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When is TBPS or DTBPS preferred over DMDS?

Refineries may select TBPS/DTBPS when:

• A lower sulfiding temperature is required.
• Methane formation (“methane make”) is a concern.
• Operators prefer less odor and improved safety profile (TBPS/DTBPS are less volatile than DMDS).
• The unit requires gradual sulfur release for temperature-sensitive catalysts.

How is the sulfiding process monitored?

A controlled sulfiding procedure includes:

1. Drying the catalyst bed (200–250°F).
2. Wetting with clean straight-run feed.
3. Injecting DMDS or DTBPS at 450–500°F in hydrogen-rich atmosphere.
4. Monitoring H₂S concentration to detect catalyst activation (“breakthrough”).
5. Holding temperature (600–660°F) until sulfiding is complete.

Modern refineries use online H₂S and hydrogen analyzers to ensure precision and safety throughout the process.

How is the sulfiding process monitored?

Modern refineries use online H₂S and hydrogen analyzers to monitor sulfiding progress. The process involves:

1. Drying and wetting the catalyst bed.
2. Gradually heating the reactor while introducing the sulfiding agent.
3. Tracking H₂S concentration in the effluent gas to detect breakthrough — the point at which the catalyst becomes fully sulfided.
4. Holding at a final temperature (typically 600–660°F) until completion.

What is sulfiding in refineries?

Sulfiding is the activation process for hydrotreating and hydrocracking catalysts. Fresh catalysts are manufactured in oxide form and must be converted into their active sulfide form before they can remove sulfur, nitrogen, and other impurities from fuels. The process involves feeding a sulfur-containing compound (sulfiding agent) with hydrogen into the reactor to form hydrogen sulfide (H₂S), which reacts with the catalyst to create the active sulfide phase.

Sodium Methoxide in Methanol

We are pleased to offer immediate availability of Sodium Methoxide in Methanol, manufactured via the metallic sodium method, a process known for delivering high purity and consistent performance. This product meets the requirements of HG/T 2561-2014 and is ideal for applications in pharmaceuticals, agrochemicals, biodiesel production, and fine chemical synthesis.

Product Highlights

• Exceptional Purity Total alkali content: 30.15% Free alkali: 0.27% Moisture: 0.12% Ensures high reactivity and minimal side reactions.
• Reliable Metallic Sodium Route Produced using metallic sodium and anhydrous methanol, this method avoids water byproducts and delivers superior product stability.
• Ready-to-Ship Inventory Current stock: 5MT in barrel packaging, available for prompt dispatch.
• Strict Quality Control Each batch is tested and certified with a full Certificate of Analysis (COA) to guarantee compliance and peace of mind.

Product Details

• Product Name: Sodium Methoxide in Methanol
• Lot No.: JPG2510170930
• Packaging: ISO Tank
• Quantity: 20 Metric Tons/ISO tank
• Quality Standard: HG/T 2561-2014
• CAS No.: 124-41-4

Test Item	Specification	Test Result
Appearance	Colorless to Yellowish Viscous Liquid	Colorless Viscous Liquid
Total Alkali Content	28.9–31.0%	30.15%
Free Alkali	≤0.50%	0.27%
Moisture	≤0.20%	0.12%

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If this specification suits your requirements, or if you need a tailored quotation or sample, please don’t hesitate to reach out. We’re committed to providing responsive service, dependable quality, and flexible logistics to support your business.

Certificate of Analysis (COA)
Product Name: Cyclopentane/Isopentane Blend (80-20%)
Batch No.: JY20251014
Date of Manufacture: October 14, 2025
Date of Analysis: October 14, 2025
Manufacturer: Junyuan Petroleum Group
Packaging Type: ISO Tank
Quantity: 16 Metric Tons

Analytical Results:

Parameter	Specification Range	Test Result	Unit	Test Method
Cyclopentane Content	78.0 – 82.0	80.3	wt%	GC
Isopentane Content	18.0 – 22.0	19.7	wt%	GC
Total Sulfur	≤ 5	2.1	ppm	ASTM D5453
Benzene Content	≤ 5	1.3	ppm	GC-MS

Application:

This product is primarily used as a blowing agent in the production of polyurethane foams, especially for refrigeration insulation panels and construction-grade thermal insulation materials. It may also be used as a solvent or formulation component in chemical manufacturing processes requiring low boiling point hydrocarbons.

Remarks:

• All values are based on standard laboratory testing procedures.
• The product meets the required specifications and is suitable for industrial use.
• This COA is issued by the Quality Control Department and reflects the actual batch performance.

1. Product Overview

Cyclopentane (Low Thermal Conductivity Type) is a high-efficiency hydrocarbon blowing agent developed for polyurethane (PU) rigid foam insulation systems. Compared with traditional blowing agents, it provides superior insulation performance, environmental protection, and process safety. It is an ideal alternative to CFC and HCFC agents, aligning with global environmental trends.

Main advantages include:

low thermal conductivity for enhanced insulation efficiency;

zero ozone depletion potential (ODP = 0);

low global warming potential (GWP);

and stable, safe, and efficient supply and transportation.

2. Technical Advantages

First, its low thermal conductivity delivers excellent insulation performance. The product’s optimized molecular design and uniform foam-cell structure help reduce heat transfer, significantly improving the thermal insulation capacity of polyurethane foam. It has been successfully used in refrigerators, freezers, and construction panels to help products achieve higher energy efficiency standards.

Second, it offers outstanding environmental compatibility. Cyclopentane contains no chlorine or fluorine and therefore has zero ozone depletion potential. Its greenhouse gas impact is minimal, and it meets the latest global environmental protection regulations. The product supports industries in achieving sustainability and carbon reduction targets.

Third, it is cost-effective and highly compatible with existing foaming processes. Raw materials are abundant, production technology is mature, and it can directly replace traditional systems without major equipment modifications. Compared with imported fluorinated blowing agents, it offers more stable costs and shorter delivery times.

Fourth, it ensures operational safety when handled properly. As a flammable hydrocarbon, Cyclopentane should be used in well-ventilated, explosion-proof environments. Standardized closed systems, anti-static measures, and professional storage and transportation management can effectively minimize risks. Industrial users have already accumulated mature experience in its safe and stable application.

3. Application Fields

Cyclopentane (Low Thermal Conductivity Type) is suitable for a wide range of polyurethane rigid foam applications that require both high insulation and environmental performance.

In the household appliance sector, it is mainly used as a blowing agent in refrigerator and freezer insulation systems, improving energy efficiency and reducing power consumption.

In the building materials sector, it is widely used in wall and roof insulation panels. Its low thermal conductivity helps buildings meet increasingly strict energy-saving standards.

In the cold chain and logistics sector, it is used in the insulation layers of refrigerated trucks and cold storage equipment, effectively reducing heat loss and improving temperature stability.

In the industrial sector, it is used for the insulation of pipes, tanks, and other equipment that require long-term thermal stability and durable foam structures.

The product formulation can be customized to meet different application requirements, ensuring consistent performance across diverse foaming systems.

4. Market Potential

With the global elimination of fluorinated blowing agents, hydrocarbon-based alternatives are gaining rapid adoption. Cyclopentane (Low Thermal Conductivity Type) has become one of the most promising options thanks to its combination of high energy efficiency, low environmental impact, cost-effectiveness, and reliable availability.

Under the global carbon neutrality trend, demand for sustainable insulation materials continues to rise. Cyclopentane (Low Thermal Conductivity Type) will play a vital role in next-generation insulation systems for refrigeration, construction, and industrial applications.

5. Promotional Summary

Cyclopentane (Low Thermal Conductivity Type) — Smarter Insulation, Greener Future.

Engineered for superior thermal efficiency and environmental protection.

Low thermal conductivity, zero ODP, low GWP, stable and cost-effective performance.

Ideal for energy-efficient refrigerators, building insulation panels, and cold-chain logistics.

Lower conductivity. Higher sustainability.

— Supporting High-Standard Compliance in the Pharmaceutical Industry

We are pleased to announce that our n-Heptane (CAS No.: 142-82-5) has successfully obtained EU REACH 1000MT+ registration, marking a significant step forward in regulatory compliance, safety, and market access. This achievement highlights our commitment to regulatory excellence and sustainable supply in the global chemical market.

Applications of n-Heptane in the Pharmaceutical Industry

In the pharmaceutical sector, n-Heptane is an essential organic solvent widely used across analysis, purification, and formulation development. Its non-polar nature and high purity make it an ideal choice in various drug manufacturing processes:

• Solvent Functions: Used for extraction, crystallization, and separation processes, particularly effective in purifying active pharmaceutical ingredients (APIs) or intermediates.
• Chromatographic Analysis: Serves as a standard solvent for gas chromatography (GC) or high-performance liquid chromatography (HPLC), facilitating accurate analysis of drug components and impurities.
• Formulation Development: Acts as an excipient or process solvent in certain formulations, assisting coating, granulation, and drying processes.
• Cleaning Agent: Suitable for cleaning equipment or glassware, especially in water-sensitive production processes.
• Reference Material: Employed in pharmacopeial testing as a standard for instrument calibration or method validation.

Significance of REACH Registration

REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) is one of the strictest chemical regulatory frameworks worldwide. Achieving 1000MT+ registration allows us to legally supply over 1,000 tons of n-Heptane annually to the EU market, backed by comprehensive physical-chemical, toxicological, and environmental assessments.

This milestone reflects our dedication to quality and regulatory compliance while strengthening our competitive edge across the pharmaceutical, coatings, rubber, ink, and specialty chemical industries.

Safety and Compliance

n-Heptane is volatile and possesses neurotoxic potential. It should be handled in well-ventilated areas with appropriate protective measures. We uphold the principles of safety, environmental responsibility, and regulatory compliance to provide customers with high-standard chemical solutions and technical support.

For technical data sheets (TDS), MSDS, or regulatory support documents related to n-Heptane, please feel free to contact us.

#Heptane #nHeptane #REACH #PharmaceuticalSolvent #GreenChemistry #ChemicalCompliance

In pharmaceutical manufacturing, purity is more than a specification — it’s a promise. Every solvent plays a critical role in ensuring product safety, consistency, and regulatory compliance. That’s why we’re proud to introduce our premium-grade n-Heptane, produced by the only REACH-registered manufacturer in China.

Why Choose Our n-Heptane

• REACH-Certified for Europe We are the sole Chinese producer of n-Heptane officially registered under the EU REACH regulation. This guarantees full compliance for import and use across European markets, including Italy.
• Pharmaceutical-Grade Purity With purity levels exceeding 99%, our n-Heptane meets the stringent requirements of pharmaceutical applications — from active ingredient extraction to crystallization and cleaning processes.
• Reliable Supply and Documentation We offer consistent production capacity, flexible packaging options, and complete technical documentation including COA and MSDS, ensuring smooth procurement and regulatory alignment.
• Dedicated Support for European Clients Our experienced export team provides clear communication, fast response times, and full assistance with logistics coordination and compliance paperwork.

Bridging Chinese Manufacturing with European Standards

Our REACH certification is more than a regulatory milestone — it’s a symbol of our long-term commitment to quality, safety, and partnership. We understand the expectations of European pharmaceutical companies and deliver accordingly.

Let’s Build a Smarter, Safer Supply Chain Together

Whether you’re optimizing your sourcing strategy or seeking a more compliant and cost-effective alternative, our n-Heptane is ready to meet your needs.

n-Heptane (CAS No.: 142-82-5) is a widely used non-polar organic solvent in pharmaceuticals, coatings, and specialty chemical industries. While its high purity and versatile applications make it an essential industrial chemical, it is important to understand its flash point, a critical property for safe handling and storage.

What is Flash Point?

The flash point of a liquid is the lowest temperature at which it can vaporize to form a combustible mixture with air. At or above this temperature, a spark or flame can ignite the vapor, potentially causing fire or explosion. Understanding flash points is fundamental for classifying chemicals, selecting storage conditions, and implementing safety measures.

Flash Point of n-Heptane

n-Heptane is highly flammable, with a flash point of approximately −4°C (24.8°F). This extremely low value indicates that n-Heptane can easily form flammable vapors at room temperature, emphasizing the need for caution during handling.

Safety Implications

Because of its low flash point, n-Heptane requires careful handling to minimize fire hazards:

• Storage: Keep in tightly sealed containers, away from heat, sparks, and open flames.
• Ventilation: Use in well-ventilated areas to prevent vapor accumulation.
• Personal Protection: Wear flame-resistant clothing and appropriate gloves and goggles.
• Grounding and Bonding: When transferring n-Heptane between containers, ensure proper grounding to avoid static sparks.

Industrial Relevance

Understanding n-Heptane’s flash point is not only important for laboratory and industrial safety but also for regulatory compliance. It helps chemical manufacturers, distributors, and end-users comply with fire safety regulations, REACH guidelines, and occupational health standards.

Conclusion

The flash point of n-Heptane is a key physical property that underscores its high flammability. Proper knowledge, storage, and handling practices ensure that this versatile solvent can be safely used in pharmaceutical, coating, and specialty chemical applications.

#nHeptane #Heptane #ChemicalSafety #FlashPoint #PharmaceuticalSolvent #FlammableLiquids #ChemicalCompliance