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The classification and size order of polar solvents

by David Zhang, Sales Manager at Junyuan Petroleum Group March 4, 2022

The classification and size order of polar solvents
Polar solvent
Polar solvent refers to the solvent containing polar groups such as hydroxyl or carbonyl, that is, the solvent molecule is a polar molecule. The polarity of the molecule is caused by the non coincidence of the centers of gravity of positive and negative charges in the molecule. The physical quantity used to characterize the polarity of molecules is dipole moment or dielectric constant. A large dielectric constant indicates a large polarity.
Chemical covalent bond can be divided into polar bond and nonpolar bond. Nonpolar bonds are common electron pairs that are not offset and appear in simple substances, such as O2; A polar bond is an offset of a common electron pair, such as HCl. When the offset is very strong, it seems that one side completely loses electrons and the other side gets electrons, which will become ionic bonds, such as NaCl.
The polarity of a compound depends on the functional groups and molecular structure contained in the molecule. The polarity of various compounds increases in the following order:
– CH3, – CH2 -, – CH =, – C III, – o-r, – S-R, – NO2, – n (R) 2, – ocor, – CHO, – COR, – NH2, – Oh, – COOH, – SO3H
Strong polar solvent
Methanol > ethanol > isopropanol
Medium polar solvent
Ethyl cyanide > ethyl acetate > chloroform > dichloromethane > ether > toluene
Nonpolar solvent
Cyclohexane, petroleum ether, hexane, pentane
Polarity order of single solvent
Petroleum ether (small) → cyclohexane → carbon tetrachloride → trichloroethylene → benzene → toluene → dichloromethane → chloroform → ether → ethyl acetate → methyl acetate → acetone → n-propanol → methanol → pyridine → acetic acid (large)

Polar order of mixed solvents
Benzene: chloroform (1 + 1) → cyclohexane: ethyl acetate (8 + 2) → chloroform: acetone (95 + 5) → benzene: acetone (9 + 1) → benzene: ethyl acetate (8 + 2) → chloroform: ether (9 + 1) → benzene: methanol (95 + 5) → benzene: ether (6 + 4) → cyclohexane: ethyl acetate (1 + 1) → chloroform: ether (8 + 2) → chloroform: methanol (99 + 1) → benzene: methanol (9 + 1) → chloroform: acetone (85 + 15) → benzene: ether (4 + 6) → benzene: ethyl acetate (1 + 1) → chloroform: methanol (95 + 5) → chloroform: acetone (7 + 3) → benzene: ethyl acetate (3 + 7) → benzene: ether (1 + 9) → ether: methanol (99 + 1) → ethyl acetate: methanol (99 + 1) → benzene: acetone (1 + 1) → chloroform: methanol (9 + 1)
Note: benzene: methanol (95 + 5) means that 95 volumes of benzene are mixed with 5 volumes of methanol to form a mixed solvent
Common mixed solvents
Ethyl acetate / hexane: common concentration: 0 ~ 30%. However, it is sometimes difficult to completely remove the solvent on the rotary evaporator.
Ether / pentane system: it is commonly used when the concentration is 0 ~ 40%. It is very easy to remove on the rotary evaporator.
Ethanol / hexane or pentane: 5 ~ 30% is suitable for strong polar compounds.
Dichloromethane / hexane or pentane: 5 ~ 30%, which can be considered when other mixed solvents fail.
Comparison of functional group polarity
Alkanes (- CH3, – CH2 -) < olefins (- CH = ch -) < ethers (- O-CH3, – o-ch2 -) < nitro compounds (- NO2) < dimethylamine (ch3-n-ch3) < lipids (- coor) < ketones (- co -) < aldehydes (- CHO) < mercaptans (- SH) < amines (- NH2) < amides (- nhco-ch3) < alcohols (- OH) < phenols (- ar-oh) < carboxylic acids (- COOH)
Common mobile phase polarity
Petroleum ether < gasoline < heptane < hexane < carbon disulfide < xylene < toluene < chloropropane < benzene < bromoethane < brominated benzene < dichloroethane (DCM) < chloroform < isopropyl ether < nitromethane < butyl acetate < ether < ethyl acetate < n-pentane < n-butanol < phenol < methylethanol < TERT butanol < tetrahydrofuran < dioxane < acetone < ethanol < acetonitrile < methanol < nitrogen dimethylformamide (DMF) < water
Indicates the polarity of an organic solvent, which is related to its physicochemical properties, such as dielectric constant, dipole moment or refractive index. This representation regards all solvents as continuous acting media rather than discontinuous unity composed of various molecules, and does not take into account the special interaction between solvents and solutes.

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CyclopentaneHeptanesHexanesOctanesPentane BlendsPentanes

22-JAN-22, There was no change in the price of Pentane, Hexane and Heptane series products today.

by David Zhang, Sales Manager at Junyuan Petroleum Group January 22, 2022

22-JAN-22, There was no change in the price of Pentane, Hexane and Heptane series products today. It’s just a kind reminder that the Chinese New Year holiday is coming. Customers who need to confirm orders please make arrangements in advance.
Spring Festival (Chinese New Year)
The State Council released the official China public holiday 2022 schedule through its Circular of the General Office of the State Council on the Arrangement of Public Holidays in 2022. In 2022, Spring Festival falls between January 31 and February 6. Saturday, January 29 and Sunday, January 30, are designated as official workdays to partially offset the seven days off for Spring Festival.

  • January 31 to February 6, 2022 (seven days in total; Monday to Sunday)
  • Adjusted working days: January 29, 2022 (Saturday) and January 30, 2022 (Sunday)
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The price of foaming agent rose slightly today - price change trend of pentane, hexane and heptane
CyclopentaneHeptanesHexanesOctanesPentane BlendsPentanes

The price of pentane blowing agents rose slightly today

by David Zhang, Sales Manager at Junyuan Petroleum Group December 30, 2021

The price of foaming agent rose slightly today, among which the price of foam blowing agent with high Isopentane content increased by 0.81 percentage points, and the price of foam blowing agent with high n-Pentane content increased by 0.85 percentage points. The price returned to its position on December 24.
The prices of other key products such as n-Pentane, Isopentane, n-Heptane and n-Hexane remain unchanged today.
Chemical Market Focus
U.S. commercial crude oil inventory and refined oil inventory decreased, and international oil prices continued to rise, but the epidemic in Europe and the United States severely restrained the increase again. NYMEX crude oil futures 02 contract 76.56, up $0.58/barrel or 0.76%; Ice oil distribution futures 02 contract 79.23 rose $0.29/barrel, or 0.37%.
Industry News
◎ judging from the US economic data, crude oil prices rose and fell
Recently, the US dollar index has weakened, reaching 96.09 on December 27, down 0.50% from December 17. The decline of the dollar mainly stems from: on December 20, Goldman Sachs Group lowered its forecast for U.S. economic growth because Democratic Senator manqin said he would not support the core content of President Biden’s economic agenda, that is, the $2 trillion tax and expenditure plan. Manchin’s statement actually killed the Democratic Party’s plan to pass the bill called build back better. Economists at Goldman Sachs said that if the bill could not be passed, it would have a negative impact on U.S. economic growth and would make the U.S. economy face the dilemma of slowing down in 2022. The weakening dollar supported the rise of crude oil prices to a certain extent.
◎ domestic LNG price in terms of apparent consumption
Affected by the epidemic situation, the comprehensive statistics of domestic apparent natural gas consumption from January to February 2020 is 52.7 billion cubic meters. Without splitting, the annual apparent natural gas consumption in 2020 is 320.38 billion cubic meters. Except for the epidemic situation at the beginning of the year and the Spring Festival factors, it is relatively stable throughout the year and increases in the heating season. There will be great changes in 2021. Although the overall consumption increases greatly, the consumption growth rate is unstable. As of October 2021, the apparent consumption of domestic natural gas totaled 302.893 billion cubic meters, an increase of 24.51% over the same period last year. And this year, the apparent consumption in October near the heating season decreased by 2.34% compared with September. The reason is that under the demand expectation and supply guarantee requirements of this year’s heating season, the domestic natural gas reserve work is carried out in advance, and the overall reserve is relatively sufficient. With the promotion of carbon peak and carbon neutralization, the strengthening of environmental protection work by local governments greatly limits the industrial demand, so the demand shrinks near the heating season.
◎ needle coke market summary in November
In November 2021, the import volume of needle coke was 20900 tons, an increase of 11% month on month. Among them, oil measures are 8700 tons, accounting for 41.6%, and coal measures are 12200 tons, accounting for 58.4%. From January to November 2021, the cumulative import volume of needle coke is about 205400 tons, and the oil series is 97500 tons, accounting for 47%. Coal measures account for 10.79%, accounting for 52%
◎ liquefied gas: the market rebounded at a low level after ether appeared on the positive support of supply and demand
The supply of some oil producing countries has decreased and the market demand prospect has been better supported. The international crude oil trend is strong, which has obvious positive support for the relevant industrial chains in the region. However, as the end of the year is approaching, there is a certain demand for inventory discharge by enterprises, and the market atmosphere tends to be conservative. It is expected that the market will maintain stability in the short term, and the power for both rise and fall is insufficient. After the year or due to the centralized replenishment of downstream goods, The market has a “good start” again, but under the influence of policy, there is uncertainty. Follow up, pay close attention to the startup and shutdown of upstream and downstream devices.
◎ game between cost and demand, stalemate in polyester filament Market
With strong cost support and weak demand as a foregone conclusion, polyester filament needs to pay more attention to its own fundamental data. As we all know, the load of direct spinning factories in the Spring Festival is higher than that of looms, so the inventory of polyester filament factories from January to February is expected. According to the market understanding, the inventory of some polyester filament factories has been at a high level. Near the Spring Festival, the factory or machine price exchange is not ruled out. At this time, polyester filament is in a shock downward trend in the game of cost and demand, or dragged down by demand.
◎ the supply of polyester bottles and chips is reduced, and the spot in the market is still tight
From the order receiving situation of polyester bottle chip manufacturers, the order receiving amount of the factory has decreased recently. Since mid September, due to the influence of dual control, some production enterprises have limited operation and reduced supply, and the spot circulation of polyester bottles and chips shows signs of tightening. In addition, the increase in foreign trade shipments has exacerbated the tense atmosphere of spot circulation. The large downstream soft drink manufacturers will advance the procurement cycle and the centralized purchase time to November. In the fourth quarter, according to the past performance, the demand is off-season, and the bottle chip factory is overhauled during this period. However, this year is different from previous years. The off-season is “not light”, and the demand side makes collective efforts. As a result, the polyester bottle chip factory has no spot to sell and can only sell far month futures. Last weekend, a 600000 ton unit of a large factory in East China was overhauled as planned, the supply was further reduced, and the price of polyester bottles and chips rose steadily.
◆ industry newsletter
◎ EU economic Commissioner gentiloni said that the EU is considering amending the stability and growth pact to no longer set a unified debt ceiling and allow member states to set a reasonable debt scale according to their national conditions. Since March 2020, EU member states have unanimously decided to suspend the implementation of the EU stability and growth pact until the end of 2022.
◎ the US merchandise trade deficit in November increased to US $97.8 billion, expanding to a record high. Among them, the import volume increased by 4.7% to a record high of US $252.4 billion; Exports fell to $154.7 billion. In addition, US wholesale inventory increased by 1.2% and retail inventory increased by 2% in November, the largest increase since 1992.
◎ the second-hand housing contract volume index of the United States unexpectedly fell by 2.2% in November, while it fell by 2.7% year-on-year. The real estate market, boosted by strong demand and low borrowing costs, began to cool towards the end of the year, and high house prices and limited inventory still put pressure on house purchase activities.
◎ the Ministry of industry and information technology and other six departments jointly issued the implementation plan for the recycling of industrial wastewater, which proposed to strive to achieve the reuse rate of industrial water above Designated Size of about 94% by 2025, and the water consumption of 10000 yuan of industrial added value decreased by 16% compared with 2020. Focus on key industries such as petrochemical and chemical industry, iron and steel, nonferrous metals, papermaking, textile and food, and implement the action to improve the recycling of wastewater.
◎ according to the 14th five year plan for copyright work issued by the national copyright administration, by 2025, the construction of a copyright power will have achieved remarkable results, the number of works registered across the country will exceed 5 million, and the added value of the copyright industry will increase to about 7.5% of GDP.
Thursday (December 30)
06:00 Singapore’s total fuel inventory for the week ended December 29 (10000 barrels)
21:30 US initial jobless claims for the week ended December 25 (10000)
At 21:30, the number of Americans who renewed their claims for unemployment benefits for the week ended December 18 (10000)
22:45 Chicago PMI in December

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n-Pentane in blue drums
Specialty Solvents

Weekly Prices of Chemicals 09/30/21

by David Zhang, Sales Manager at Junyuan Petroleum Group September 30, 2021

List of Weekly Rise and Fall of Chemicals (09/24/2021-09/30/2021)

Industry Chain Product Name Region 09/17/2021 09/30/2021 Fluctuation Range (Yuan / ton) Percentage(%)
Aromatic Hydrocarbon Industry Chain Pure Benzene East China 8375 7825 -550 -6.57%
Styrene East China 9250 9100 -150 -1.62%
Toluene East China 5710 5670 -40 -0.70%
Isoxylene East China 5950 5950 0 0.00%
Solvent Xylene East China 5840 5810 -30 -0.51%

CHINESE YUAN FORECAST 2021, 2022-2025

2021/09/29. USD TO CNY TODAY.

Actual USD to CNY exchange rate equal to 6.4702 Chinese Yuans per 1 Dollar. Today’s range: 6.4702-6.4702. Previous day close: 6.4710. Change for today -0.0008, -0.01%. Inverse rate: CNY to USD.

Down
6.4702
 -0.01%

Recent changes:

Period 2 Days 3 Days 1 Week 2 Weeks 1 Month
Chng,% +0.12% +0.12% +0.12% +0.19% +0.15%
Ex-Rate 6.4622 6.4622 6.4622 6.4577 6.4606

Major Key Players Covered in the Global Aromatic Hydrocarbon Solvent Market Are:

  • Exxon Mobil Corporatio
  • UOP LLC
  • Royal Dutch Shell
  • Eastman Chemical Company
  • BASF SE
  • Lyondellbasell Industries N.V
  • Chevron Phillips Chemical Company
  • Junyuan Petroleum Group

On the basis of Product Type, we research the production, revenue, price, market share and growth rate, primarily split into: –

  • Benzene
  • Toluene
  • Xylene
  • Pentane
  • Hexane
  • Heptane
  • Octane

For the end users/applications, this report focuses on the status and outlook for major applications/end users, consumption (sales), market share and growth rate of Cellular Repeater market for each application, including: –

  • Pharmaceuticals
  • Oilfield Chemicals
  • Automotive
  • Paint and Coatings
Junyuan's products are of high quality and their service is trustworthy.

Junyuan's products are of high quality and their service is trustworthy.

+8617810300898
No. 117, Guangqing Rd., Guangrao County, Dongying, China
https://junyuanpetroleumgroup.com
Buy Now
Product Name : n-Pentane, 99%
URL : https://junyuanpetroleumgroup.com/request-a-quote/
Price : 956
Currency : USD
Availability : InStock
Brand : Junyuan Petroleum Group
SKU : tons
Product MPN : NPENTANE28980287
Price Valid Until : September 30, 2021
Product Description : Pentane is a clear colorless quickly evaporating liquid with a hydrocarbon odor. It is used primarily as a solvent with other applications in synthesis and lab use.

n-Pentane - Physico-chemical Properties Molecular Formula C5H12 Molar Mass 72.1488 g/mol Density 0.649g/cm3 Melting Point -130℃ Boling Point 35.2°C at 760 mmHg Solubility insoluble Vapor Presure 527mmHg at 25°C Refractive Index 1.371

Junyuan Petroleum Group ᴾᵘʳⁱᵗʸ. Qᵘᵃˡⁱᵗʸ. ᵀʳᵘˢᵗ.
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Technical Exchange Meeting
News & Updates

Technical Exchange Meeting

by David Zhang, Sales Manager at Junyuan Petroleum Group September 19, 2021

Professors from Shandong Institute of Petrochemical Technology Came to the Company for Technical Exchange Meeting

Recently, Professor Dai Xiaodong and Professor Shi Huilong of Shandong Institute of Petrochemical Technology came to our company for technical exchange. Yu Rui, deputy general manager of the group company, and Yue Xinbing, deputy director of the production dispatching center, attended the technical exchange meeting.

The two sides had in-depth discussions on in-depth learning, which played a positive role in promoting the company’s production technology level in the solvent fields such as pentane, hexane, heptane and octane.

Warmly welcome professors from Shandong Institute of petrochemical technology to our company for technical exchange
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n-Octane loading photo
Octanes

Physical Data and Uses of n-Octane

by David Zhang, Sales Manager at Junyuan Petroleum Group June 7, 2017

Preparation Method:
Add 100g (1.53mol) of zinc amalgam, 250ml of concentrated hydrochloric acid and 50ml of water into the reaction bottle equipped with stirrer, reflux condenser and vent pipe (extending into the bottom of the bottle), add 40g (0.35mol) of octanone-2 (2) under stirring, and slowly inject hydrogen chloride gas. If the reaction is too violent, the hydrogen chloride gas can be suspended. After 2-3H, most of the zinc amalgam reaction was completed, hydrogen chloride was stopped and placed overnight. Remove the agitator and change to steam distillation unit for steam distillation until the distillate is transparent. The upper oil layer was separated, washed twice with distilled water, fractionated after drying with anhydrous sodium sulfate, and the fraction at 124-126 ℃ was collected to obtain 26G octane (1) with a yield of 58%.

Product Name: n-Octane
Product Properties and Uses: pharmaceutical intermediates;
Category: pharmaceutical intermediates;

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n-Octane Storage Tanks
Octanes

Properties of n-Octane

by David Zhang, Sales Manager at Junyuan Petroleum Group April 21, 2017

The appearance and properties of n-Octane are colorless and transparent liquid. It is one of the components of industrial gasoline. It can also be used as solvent and organic synthetic raw material. Octane is present in petroleum. Laboratory preparation can be synthesized from bromobutane.

Junyuan Petroleum Group produces and sells n-Octane, and has more information about the latest professional product parameters, real-time quotation, market situation, high-quality commodity wholesale, supplier and so on. You can also query quotations, publish inquiry information, and find business opportunities on the platform.

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The main business scope of Junyuan Petroleum Group covers seven series, including propylene butane series, pentane series, hexane series, solvent oil series, aromatics series, environment-friendly D series solvent oil and hydrogenated naphtha series, including Propane, Isobutane, n-Butane and high clean liquefied gas; Isopentane, n-Pentane, Cyclopentane, Pentane foaming agent, Isohexane and n-Hexane (content 60%, 70%, 80%, 90%, 95%, 99%), n-Heptane, 99% and n-Octane; Environmental friendly solvent oil D-20 and other more than 20 products.
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    Junyuan Petroleum Group ᴾᵘʳⁱᵗʸ. Qᵘᵃˡⁱᵗʸ. ᵀʳᵘˢᵗ.
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    Junyuan Petroleum Group ᴾᵘʳⁱᵗʸ. Qᵘᵃˡⁱᵗʸ. ᵀʳᵘˢᵗ.
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