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  About our company [2013-03-25]

Jiangsu Chemical Co., Ltd. was founded in 2008 and located in Lianyungang, Jiangsu Province, China Guannan Chemical Industrial Park, which is a professional biphenyl, terphenyl, o-terphenyl, biphenyl lipid compounds and China M-terphenyl manufacturers in the brand new chemical ground. We devote ourselves to setting technology research, manufacturing, marketing; and our annual output value exceeding 300 million RMB. What's more, our biphenyl production scale in the domestic is at the leading level, and the company has the right to import and export.

Jiangsu Chemical Co., Ltd. has always taken the science and technology as the forerunner, and done cooperation with a number of chemical research institutes and universities in Shanghai R & D base, and product R & D and trial base. The company has invested heavily in building an advanced chemical production system. Therefore our technological content of products, technological processes and detection means has been in a good advantage of the world industry.

Now, we are still working to improve product quality continuously, reduce the cost of the product, in order to get common development with our customers and to form a unique competitive advantage in the whole industry scale.

Jiangsu Chemical Co., Ltd. adheres to take the biphenyls market demand-oriented as directive for establishing an advanced, professional, efficient service team. For the sake of customers, we do our best to make good service for customers from before-sale to after-sale. To become a leader of international biphenyl industry, we explore the international market actively and export products and the technological achievements of "Made in China".

  O-terphenyl in the world and China [2013-03-25]

O-terphenyl, a kind of chemical element, has the molecular formula: C18H14; molecular weight: 230.3; CAS No. 84-15.

Production methods

In 1987, Germany Schultz isolated biphenyl, terphenyl and m-terphenyl from benzene vapor by the study of benzene pyrolysis product of hot iron pipe of the high boiling point. In 1927, Bachmann and Clark isolated three terphenyls isomers: three biphenyl, terphenyl, o-terphenyl, from coal tar and biphenyl distillation residue. In 1926, the United States began the industrial production of biphenyl, and soon terphenyl would be recycled as a by-product.

Now, China O-terphenyl manufacturers production is still produce by extracting from the biphenyl byproduct mixed terphenyls. Use the difference of boiling points, melting point, solubility characteristics of three biphenyl, terphenyl, o-terphenyl, and then take distillation, crystallization, and sublimation to separate o-terphenyl from the law. Production of o-terphenyl in China began a little late. Nowadays, the most influential brands is DYNOVA, which is produced by Jiangsu Zhongneng chemical.

  Emergency measures for using biphenyl [2013-03-25]

As a chemical element, biphenyl has a lot of applications. However, without correct application measures, biphenyl will produce huge risk. Here, I would like to talk about measures for solving risk.

First, measures for accidental release. Isolation leakage polluted area; put warning signs on the around; and then cut off the fire source. People should wear gas masks and chemical protective clothing. Collect the biphenyl in a closed container, mark it and wait for professional handling. If large spills, you need to recycle or mark as waste products after handling. Waste disposal methods: incineration.

Then, protective measures for touching biphenyls. Respiratory protection: people should wear gas masks when the concentration in the air is very high. Eye protection: wear safety glasses when necessary. Protective clothing: wearing overalls. Hand protection: Wear protective gloves when necessary. Other: no smoking scene; take a shower after working.

Third, the emergency measures for diphenyl. Skin contact: remove contaminated clothing, thoroughly washed with soap and water. Eye contact: immediately open from top to bottom eyelid, wash eyes with running water for 15minutes, and then go for medical treatment. Inhalation: leave the scene to fresh air quickly, and then go for medical treatment. Eat it: drink enough warm water for inducing vomiting, and seek for medical treatment. Firefighting methods: foam, carbon dioxide, the 1211 fire extinguishing agent, dry powder, sandy soil. Water can cause splashing boiling.

  About biphenyl [2013-03-25]

Biphenyl is an important organic raw material, which is widely used in a lot of fields such as medicine, pesticide, dyestuff, liquid crystal materials. China biphenyls also can be used to the synthesis of plasticizers, preservatives; and to manufacture fuels, plastics and high-energy fuel.

Generally speaking, biphenyls exist in coal tar, crude oil and natural gas. Preparation methods of biphenyl include benzene pyrolysis biphenyls on chemical synthesis and separation of various coal tar distillates system biphenyl extraction. The mass fraction of biphenyl of coal tar is 0.20% -0.40%. Now, in biphenyl production field, coal tar extraction and chemical synthesis coexist.

Main purposes of diphenyl: as a heat exchanger and used in organic synthesis.

Health hazards: the poisoning, mainly for the nervous system and digestive symptoms such as dizziness, headache, dizziness, drowsiness, nausea, vomiting, and sometimes liver dysfunction. If someone gets in touch with biphenyl at high levels, there will be a serious stimulus to the respiratory tract and eyes. Long-term touching with diphenyl can cause headache, fatigue, insomnia, and respiratory tract irritation. What's more, this can cause allergic contact dermatitis.

Environmental hazards: biphenyl can cause lots of pollution of the atmosphere.

Explosion hazard: This product is flammable.

Hazardous characteristics: diphenyl can case fire, heat or contact with oxidants; cause a risk of combustion and explosion.

  Optimum Method for Heat Conduction Oil Selection [2013-03-25]

With various heat conduction oils (heat transfer fluids) of different types and specifications on the market, it's a headache for customers to select them for the first time. So, how to select? By type, by initial boiling point, or by distillation range...? Here we provide an optimum method for selection - to select by the thermal stability of the conduction oil.

The thermal stability is the capability of the conduction oil to resist chemical decomposition under high temperature conditions. When the conduction oil runs into the heat transfer system, as the temperature rises, chemical reaction or molecular rearrangement will occur, and the resulting gaseous phase decomposition products, low-boiling residues, high-boiling residues and products fail to evaporate thereof will affect the application performance of the conduction oil. Due to this reason, the State Standard GB23971-2009 Heat Transfer Fluids implemented in China takes thermal stability as one of the key indexes for the Standard, rating the application and safety performance of the conduction oil that differentiates itself from other oils.

The Standard also takes the thermal stability test temperature as the basis for determining the allowed maximum application temperature of the conduction oil, and as the only basis for determining the conduction oil product code (mark). Thermal stability plays a major role in determining the type and class of the conduction oil product. That is to say, with no rating for thermal stability, no determination for allowed maximum application temperature, and thus no basis for marking product type, the oil cannot be called as conduction oil.

Since the State Standard for the conduction oil takes the thermal stability and the allowed maximum application temperature as the basis for marking product class, it has been playing a positive role in regulating the market order, providing key basis for customers to select conduction oils that suit to their application temperatures based on their own process conditions. For years, one of the major reasons behind China's disordered conduction oil market is that the allowed maximum application temperature of most conduction oils is not determined through thermal stability test. Suppliers mark the allowed maximum application temperatures of their products at will and dramatically exaggerated it.China's conduction oil market is full of products marked with maximum application temperatures @320ºC-350ºC. This not only disorders the conduction oil market itself, but also misleads the customers. Once they choose these falsely rated products, serious potential safety hazards will occur. This is also one of the major reasons behind hundreds of conduction oil boiler explosion accidents every year in China.

To effectively implement the GB23971-2009 State Conduction Oil Standard and regulate market order, safeguard production safety, and to promote healthy development of the conduction oil heat transfer technology, China has issued the compulsory Standard. To facilitate the implementation of the Standard, the authoritative testing organization - China Special Equipment Inspection and Research Institute (CSEI) came to be responsible for product type test and thermal stability test.

Mr. Si Rong et al of CBWQA have carried out research on the thermal stability of the major types of conduction oils that are most used in China, and the test data indicates:

  • The maximum application temperature of the paraffin base & naphthenic base mineral conduction oil is @300ºC.
  • The thermal stability of the mineral conduction oil based on hydrogenated base oil is higher than that of non-hydrogenated, of which the maximum application temperature reaches up to310ºC.
  • The allowed maximum application temperature of the aromatic base mineral conduction oil is generally @310ºC, with some up to320ºC.
  • The allowed maximum application temperature of the general synthetic conduction oil with Alkyl Benzene as the major composition does not exceed300ºC.
  • The allowed maximum application temperature of the DIPHYL DT synthetic conduction oil is @310ºC.
  • The allowed maximum application temperature of the synthetic conduction oil with hydrogenated Terphenyl as the major composition can be up to340ºC.

This has provided guidance and reference for customers to select appropriate conduction oils according to their own process and environmental conditions.

According to the results from the thermal stability test of 60 products of 46 suppliers by CSEI from April 2011 through August 2012, only 6 products passed thermal stability test over330ºC. Wherein SCHULTZ S750 - the hydrogenated Terphenyl conduction oil produced by Jiangsu Zhongneng Chemical Co., Ltd., has passed the thermal stability test @340ºCwith deterioration rate @ 5.3% only,  the lowest among the products tested. The allowed maximum application temperature of the product is rated @340ºC, and the product is marked as L-QD340 GB23971, a special high thermal stability synthetic conduction oil type, truly high temperature synthetic conduction oil.


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