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.

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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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.