36 results about "Trichloromethyl chloroformate" patented technology

The invention discloses a production process of 1, 4-phenylene diisocyanate. The production process includes: heating a solution of p-phenylenediamine and triethylamine to 100 DEG C, adding the heated solution and the chlorobenzene solution of di-(trichloromethyl) carbonate or the chlorobenzene solution of trichloromethyl chlorocarbonate into a reaction kettle, heating until reflux occurs, continuing adding the chlorobenzene solution of di-(trichloromethyl) carbonate or the chlorobenzene solution of trichloromethyl chlorocarbonate, rectifying, and collecting a 130-136 DEG C / 8mmHg rectifying product, wherein the reaction kettle comprises a drive motor, a stirring shaft and stirring blades, an automatic sampling device is mounted on the stirring shaft and comprises a sleeve and a sampling component, the sleeve is provided with a liquid storage cavity inside, and the sleeve comprises an annular fixed component located on the upper portion and an annular rotatable component located on the lower portion. The production process has the advantages that the sleeve, the sampling component and the stirring shaft can rotate synchronously by the annular fixed component and the annular rotatable component, real-time sampling during reaction is achieved, and sampling efficiency is increased.

The invention discloses an environmental-friendly method for synthesizing 1-methyl-3-ethide-4-chlorine-5-pyrazole formyl chloride. The synthesizing method takes 1- methyl-3-ethide-4-chlorine-5- pyrazole formic acid which is shown as a formula (II) and bis (trichloromethyl) carbonate which is shown as a formula (III) as raw materials and takes organic amine as a catalyst. The raw materials and thecatalyst react sufficiently in an organic solvent at a temperature of between 20 and 80 DEG C; and the 1-methyl-3-ethide-4-chlorine-5-pyrazole formyl chloride which is shown as the formula (I) is obtained by processing the reaction fluid. Compared with prior art, the method has advanced process flow, reasonable process conditions, and cheap and available raw materials, avoids the phosgene, the Cloruro de tionilo and the trichloromethyl chloroformate, and has simple and safe operation, high reaction yield coefficient, low production cost, great implementation value and social and economical benefits and basically does not have 'three wastes'.

The invention belongs to the technical field of an organic compound, and particularly relates to a method for preparing 4,4'-dicyclohexylmethane diisocyanate by utilizing a non-phosgene process. The method comprises the following step: reacting 4,4'-dicyclohexylmethane diisocyanate or an isomer mixture or salt thereof, or a mixture of amine and salt thereof which are as raw materials with bis(trichloromethyl) carbonate or trichloromethyl chlorocarbonate or a mixture thereof in an inert solvent. By adopting the method disclosed by the invention, the defects that preparation of the 4,4'-dicyclohexylmethane diisocyanate by utilizing the traditional phosgene process is long in process route, complicated in technique, poor in safety and the like are overcome. The method disclosed by the invention has the advantages of being convenient to operate, high in safety, environment-friendly, and accurate in reactant feeding and metering, and the feeding ratio is reduced, so that the safety coefficient of production is improved. In addition, exhaust treatment is simple; high-purity hydrochloric acid can be prepared from a hydrogen chloride gas generated by water absorption reaction; chloridion can be fully utilized; environmental conservation is facilitated.

The invention provides a process for synthesizing 4-Nitrobenzyl chloroformate, which comprises reacting trichloromethyl chloroformate or bis(trichloromethyl)carbonate with p-nitrobenzyl alcohol at -40-20 deg C under the action of acid-binding agent, finally carrying out post-treatment to obtain the outcome yield.

The invention relates to a preparation method of 1-chloroethyl cyclohexyl propyl carbonate and belongs to the field of chemicals. The preparation method of 1-chloroethyl cyclohexyl propyl carbonate comprises the following steps of: adding triethylamine or pyridine or N,N-dimethylaniline into trichloromethyl chloroformate at the temperature between 10 DEG C below zero and 0 DEG C, and dropwise adding paraldehyde to carry out reaction; adding triethylamine or pyridine or N,N-dimethylaniline after reaction, dropwise adding cyclohexanol under the condition that the temperature in a reactor is below 20 DEG C, and stirring to carry out reaction; taking a product of reaction, washing with water, and distilling by reducing pressure to obtain an organic phase which is 1-chloroethyl cyclohexyl propyl carbonate. The synthesized 1-chloroethyl cyclohexyl propyl carbonate is high in yield and purity and low in cost, and the preparation method of 1-chloroethyl cyclohexyl propyl carbonate is easy to control in the preparation process, is easy to operate, is low in risk and is particularly suitable for industrial production.

The invention discloses a preparation method of a halogen-free environment-friendly polyurethane oil paint. The preparation method comprises the following steps: performing refluxing catalytic hydrogenation reduction on a phosphatizing agent and a nitrobenzene derivative in an organic solvent with the presence of a metal catalyst to obtain a phosphatized aniline derivative, dropwise adding trichloromethyl chloroformate, mixing and stirring uniformly at room temperature, reacting continuously for 2-4 hours to obtain phosphatized phenyl isocyanate, stirring the phosphatized phenyl isocyanate and an alcoholic compound for 3 hours with the presence of a polymerization catalyst, adding an amine compound, stirring continuously for 2 hours, performing vacuum dewatering on a reaction mixture to obtain flame-retardant polyurethane resin, adding a curing agent and a solvent, and reacting to obtain the halogen-free environment-friendly polyurethane oil paint. The invention further discloses the halogen-free environment-friendly polyurethane oil paint. The halogen-free environment-friendly polyurethane oil paint is an expansive environment-friendly flame-retardant polyurethane oil paint with a phosphorous-nitrogen synergistic effect. In the production process of a flame retardant, raw materials are cheap and easily obtained; the preparation method is free of a high-heat and high-pressure process, and simple to operate, and energy consumption in the production process is low; the whole production process is saves energy and is environment-friendly.