Tuesday, September 23, 2014

Cyclohexanone Manufacture Process

High concentrations of cyclohexanone vapors have narcotic which have inhibitory effect on central nervous system. At the same time, cyclohexanone having a stimulating effect to skin and mucous membrane.  As we known, there are three method to make cyclohexanone. They are phenol method, cyclohexane oxidation mehod and hydrogenation of benzene oxidation method.

Phenol method usually use nickel as catalyst. Adding hydrogenation to the phenol, we can get cyclohexanol. Then using the zinc as catalyst to move the hydrogenation, so that we can get cyclohexanone. Cyclohexane oxidation method is always regarded cyclohexane as material and after a series of treatment, we will get qualified products.

High concentrations of cyclohexanone poisoning will damage the blood vessel and cause cardiac muscle, lung, liver, spleen, kidney and brain lesions. Even it may cause large coagulation necrosis. Then absorbed by skin. Finally there will be tremors anesthesia, reduce temperature and until to death. Cyclohexanone is widely used for coating producing, synthetic resin dissolved and preparing paint stripping agent. It also could be regarded as penicillin, tetracycline production solvent. Cyclohexanone is an important chemical raw material for a wide range of application. It is mainly used as intermediate of caprolactam, adipate acid and its salt.  It has good dissolving capacity, little poison and relatively low price.

Wednesday, September 10, 2014

Methylene Chloride In Different Industries

Methylene chloride is widely used in many industries. It can not only used for chemical industry, but also applicated in pharmaceutical industry. Methylene chloride has the advantages of strong dissolving capacity and low toxicity. It is widely used for safety film and polycarbonate. It is also regarded as paint solvent, metal degreasing agent, aerosol sprays, polyurethane foaming agent, release agent, paint remover and correction fluid.

Methylene chloride is a colorless liquid. It can used as a reaction medium in pharmaceutical industry and also can make into oil dewaxing solvents, aerosol propellants and synthetic organic extractant. On the research of plant genetic, methylene chloride can used as solvent and mutagens.

In China, methylene chloride is mainly used for film production and medical field. Consumption of film production accounted for 50% of total consumption. Medical field only account for 20%. Cleaning agent and chemical industry consumption accounted for 20% of the total consumption. Generally speaking, methylene chloride is synthesis of chlorinated with methane. Methane chloride by chlorination can get a pile of mixture which has four kinds. Because of their boiling point distance is relatively large, people can separation and purification through ordinary fractionation technique.