Dicyclohexylamine Molecular Weight-manufacture,factory,supplier from China

Dicyclohexylamine has the chemical properties of a secondary amine. It has a strong base and can form salts with various acids. Acylation may occur. In terms of solubility, dicyclohexylamine is slightly soluble in cold water but almost insoluble in hot water. Dry powder, carbon dioxide, soluble foam and sand are used to extinguish the fire.

The invention relates to a method for the synthesis of N-chlorinated dicyclohexylamine with low concentration of sodium hypochlorite. The mass of dicyclohexylamine is weighed, and the amount of sodium hypochlorite of low concentration required for the reaction is calculated according to the molar ratio of dicyclohexylamine and sodium hypochlorite =1:1.051.20. Put dicyclohexylamine into the reactor, and keep the reactor temperature.

The purity of dicyclohexylamine is better than 99.five%, that is 99% higher than the standard of peer organizations. recycling the economic chain can lessen the comprehensive value of the manufacturing facility. there are 3 aniline factories in dongying, shandong, huai 'an, jiangsu and tianji, shanxi within four hundred kilometers. the generation is mature, and the people have about twenty years of practical enjoy.

The invention relates to a refining method of dicyclohexylamine, belonging to the technical field of organic chemistry.

The purity of dicyclohexylamine is higher than ninety nine.5%, that is 99% better than the same old of peer groups. recycling the economic chain can lessen the comprehensive price of the producing facility. there are three aniline factories in dongying, shandong, huai 'an, jiangsu and tianji, shanxi within four hundred kilometers. the era is mature, and the people have about 20 years of practical enjoy.

The purity of dicyclohexylamine is higher than 99.5%, which is 99% higher than the standard of peer enterprises. Recycling the industrial chain can reduce the comprehensive cost of the factory. There are three aniline factories in Dongying, Shandong, Huai 'an, Jiangsu and Tianji, Shanxi within 400 kilometers. The technology is mature, and the workers have about twenty years of practical experience. Stable supply, with an annual output of 36,000 tons, of which dicyclohexylamine has an annual output of 12,000 tons.

At present, there are few reports on the quantitative analysis of dicyclohexylamine and impurities, so it is necessary to study them separately accurate quantitative analysis method. Since dicyclohexylamine has no ultraviolet absorption, the quantitative analysis method of dicyclohexylamine by high performance liquid chromatography evaporative light scattering detector was studied. 

The invention relates to a tail gas refining method, especially a method for hydrogenation of aniline to produce dicyclohexylamine tail gas deamination and hydrogen refining, which belongs to the technical field of chemical industry.

The purity of dicyclohexylamine is better than ninety nine.5%, this is 99% higher than the identical old of peer companies. recycling the economic chain can reduce the complete fee of the manufacturing facility. there are 3 aniline factories in dongying, shandong, huai 'an, jiangsu and tianji, shanxi within 4 hundred kilometers. the technology is mature, and the human beings have approximately twenty years of realistic experience.

The invention relates to a synthesis method of dicyclohexylamine, which comprises the following steps: in a hydrogenation reactor, aniline and hydrogen are hydrogenated in gas phase under the catalyst to obtain DCHA crude product.The replacement reaction was carried out with aniline and DCHA crude product to obtain the replacement mother liquor. The replacement mother liquor was delight and refined, and DCHA product was obtained at the top of the refining tower.

Cyclohexanol gas-phase ammoniation method: it is the liquid hydrogenation of cyclohexanol and ammonia to cyclohexanamine and dicyclohexanamine under the action of nickel/silica catalyst. The yield of cyclohexanol and dicyclohexanamine is 3:1, and the conversion rate of cyclohexanol is about 70%, which has not been reported in industrialization in China.

At present, amine salt type corrosion inhibitors are widely used and have superior effects. Through physical and chemical analysis of the sample, ultraviolet spectrum, infrared spectrum, nuclear magnetic resonance spectroscopy and ion chromatography and other series of analysis and  prediction to determine the role of different ions of dicyclohexylamine salt corrosion inhibitor in steel corrosion analysis, and finally determined that the solid sample may be dicyclohexylamine nitrite. 

The method of species co-production of cyclohexylamine and dicyclohexylamine and the catalyst system used for the method. The method includes the following steps :(1) the raw material aniline, cyclohexanone, ammonia, hydrogen after the loading load RhNi catalyst first section reactor, the first reaction liquid.(2) The reaction solution containing cyclohexylamine and dicyclohexylamine was obtained through the second stage reactor loaded with RhCo catalyst.

DCHA at home and abroad is usually a by-product of CHA production. In the process of CHA synthesis by aniline hydrogenation, about 10% of DCHA can be obtained by by-product. In addition, according to the different catalysts, the yield of DCHA prepared by aniline hydrogenation can reach up to 70%, and the yield of cyclohexylamine (CHA) is 30%.Benzene, cyclohexane, cyclohexanol, N-cyclohexylcyclohexamine, phenylcyclohexylamine and other by-products will be generated in the reaction.

Foreign production and application are mainly concentrated in the western developed countries and regions, the main manufacturers are the United States Air Products company, Celanes company, Germany BASF, Bayer company and other scale manufacturers. But in Europe, cyclohexylamine has been in short supply due to the limitation of hydrogen feedstock. With the rapid development of the food additive cyclamate and rubber industry, the consumption of cyclohexylamine has been increasing at an average annual rate of more than 10%.

The process relates to a tail gas refining method, in particular to the hydrogenation of aniline to prepare cyclohexylamine and the deamination of dicyclohexylamine tail gas to refine hydrogen.

A vapor phase corrosion inhibitor preparation method, including the following steps :a. Dispersing montmorillonite in deionized water, beating, stirring, and then taking the suspension of the solution to add morpholine, heating the solution to evaporate and precipitate crystals.b. Add formaldehyde to the solution in Step a and let it stand; add dicyclohexylamine and let it stand; then add the mixed solution of benzoic acid and acetone to the solution and let it stand to generate white slurry.

Nitrocyclohexane reduction method: This method takes nitrocyclohexane and hydrogen as raw materials, using reducing agent to generate cyclohexylamine, because nitrocyclohexane raw materials are difficult to obtain, this method is basically eliminated. Moreover, the process has some defects, such as low one-way conversion of aniline and poor selectivity of dicyclohexylamine.

The invention uses nitro-benzene and hydrogen as raw materials. Adding solvent, nitro-benzene and catalyst into the reaction kettle, controlling the reaction pressure of 0.5 ~ 4MPa, reaction temperature of 60 ~ 160℃, reaction for 2 ~ 8h, cyclohexylamine and dicyclohexylamine are obtained, and the catalyst used is Pd/CNTs catalyst or PD-Ni /CNTs catalyst. 

By controlling the parameters in each step, such as time, temperature, pressure, etc.The yield of cyclohexylamine products is high, the product yield is more than 99%, the quality is stable, the yield is high, the production capacity is large, the side reaction is less, and a small amount of by-product dicyclohexylamine in the reaction can be recovered and purified, and the added value of the products can be increased.

The purity of hydrogen is high, and the purity of cyclohexylamine reaches over 99.95%, which is higher than the industry standard by 99.8%. The purity of dicyclohexylamine is higher than 99.5%, which is 99% higher than the standard of peer enterprises. Recycling the industrial chain can reduce the comprehensive cost of the factory. There are three aniline factories in Dongying, Shandong, Huai 'an, Jiangsu and Tianji, Shanxi within 400 kilometers. The technology is mature, and the workers have about twenty years of practical experience.

Devices that use tail gas to recover cyclohexylamine are characterized in that they include: spray tower, circulating pump, condenser, defogger, photooxygen catalytic oxidizer, ozone treatment device, blower, chimney. Described in the circulating pump and spray the bottom connection, as described in the other side of the circulating pump are connected to the condenser, the condenser and the upper spray tower connection, described in the spray tower are connected to the top of demister, described in the mist bottom and photocatalytic oxidation, photocatalytic oxidation is described, ozone

It is obtained by catalytic reduction of nickel or cobalt from aniline at high temperature and pressure. Cyclohexanol can also be reduced by phenol, oxidized to cyclohexanone, and then aminated with ammonia to obtain cyclohexanamine.This substance is harmful to the environment, and special attention should be paid to the pollution of water bodies. Acute poisoning may occur by inhalation of vapour. Irritant and corrosive to skin, eyes and mucous membranes, and can cause allergy through skin absorption.

To explore the application value of ion chromatography in the detection of cyclohexylamine in workplace air. Workplaces containing cyclohexylamine in the production of raw materials were selected as sampling sites, and the content of cyclohexylamine in workplaces was detected by ion chromatography. At the same time, the precision and recovery rate of ion chromatography, desorption efficiency, sampling efficiency and other cation interference characteristics were analyzed.