Wuzheng Engineering (Shanghai)Co., Ltd.
Hotline: 021-68882529
Wuzheng Engineering (Shanghai)Co., Ltd.

Products Fine Chemical Industry
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1.  Background1, 6-hexanediol (HDO) is a white solid at room temperature,Its melting point is 43℃, boiling point is 250℃, soluble in water and ethanol, slightly soluble in hot ether, insoluble in benzene. HDO is mainly used in the production of polyurethane, unsaturated polyester, coatings, adhesives, plasticizer hardener and lubricating oil thermal stability improvers.   2.  Flow SheetPreparation of 1, 6-hexadiol with adipic acid mainly includes two steps:Esterification:Dimethyl adipate was synthesized by reaction of adipic acid and methanol.Hydrogenation: 1,6-Hexanediol was synthesized by hydrogenation of dimethyl adipate.  3.  Reaction Equation  4.  Process Parameters and Catalyst PerformanceEsterification:   Hyd...
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1. Backgroundε-caprolactone monomer is a useful chemical intermediate and can also be used as a strong solvent. Polycaprolactone (PCL) is widely used in the synthesis of environmentally friendly materials (degradable plastics). 2. ProcessDimethyl adipate (DMA) was firstly prepared by continuous esterification from adipate (AA) and then hydrogenated to 1, 6-hexanediol (HDO). ε-caprolactone is a by-product. Because of its high value, we can get high value-added by-products by distillation separation.
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1,4-butanediol is an important organic and fine chemical raw material,and is widely applied in many fields, such as medicine, chemical industry, textile, papermaking, automobile and daily chemical industry, etc.. The main commercialized technologies for 1,4-butanediol are as follows: (1) alkynaldehyde process, which is used acetylene and formaldehyde as raw materials; (2) maleic anhydride method, which is used Benzene or n-butane as raw materials under oxidation- esterification- hydrogenation reaction; (3) butadiene acetoxylation method, which is used Butadiene and acetic acid as raw materials. 1,4-butanediol is mainly produced by alkynaldehyde process and maleic anhydride method in China. Due to petroleum price decreasing, maleic anhydride method play an more important role than other tec...
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Neopentyl glycol (NPG) is widely applied in many fields, such as powder coatings, resins, polyurethane foams, plasticizers, surfactants, insulating materials, etc. Sodium formate process is a simple and traditional technology for neopentyl glycol in China, which consumes a lot of formaldehyde and produces a large amount of wastewater. So the sodium formate process will be replaced by advanced condensation-hydrogenation process, which reduce consumption of formaldehyde and produces a small amount of wastewater. We also developed an advanced condensation -hydrogenation process of formaldehyde isobutyraldehyde to produce neopentyl glycol.
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1,6-hexanediamine is an important chemical product which is widely applied in many fields, (1) polyamides, such as nylon 66, nylon 610; (2) diisocyanate; (3) the curing agents and organic crosslinking agent of such as urea-formaldehyde resin, epoxy resin, etc. Hexanediamine products are highly monopolized by Invida, Basf and Oshende, which account for 74% of global production capacity. Adiponitrile hydrogenation is main technology for the synthesis of 1,6-hexanediamine., the application of hexamethylene diamine is expanded rapidly which results in a shortage of supply and demand with the continuous development of China's automobile industryA new process is developed by the researchers of our company, which is used adipic acid as raw material, synthesized 1,6-hexanediamine through amidation...
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1. BackgroundA saturated monool containing more than twelve carbon atoms is called a higher alcohol. It is stable in nature, not easy to oxidize, stable under light, resistant to acid and alkali, not moisture absorption, and has good biodegradability and bioactivity. It usually exists in the form of white waxy solid, powder or flake crystal at room temperature. It's odorless, tasteless, non-toxic, insoluble in water, and mainly used as plasticizer, defoamer and detergent. 2.ProcessThe process is divided into two steps:Borate was synthesized from wax by boric acid oxidation;High alcohols were prepared by hydrolysis of borate.
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Wuzheng Company can provide the preparation, purification and refinement of special chemicals, fine chemicals and intermediates according to customers' requirements.
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