Unlock instant, AI-driven research and patent intelligence for your innovation.

Synthesis process of methyl chloroformate

A technology of methyl chloroformate and synthesis process, applied in the preparation of phosgene or haloformate, organic chemistry, etc., can solve the problems of high pressure in the tail gas system, increased phosgene feed ratio, and large amount of light-containing tail gas.

Pending Publication Date: 2021-03-26
ANHUI GUANGXIN AGROCHEM
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The reaction between phosgene and methanol is not sufficient. For the quality and yield of methyl chloroformate, the feed ratio of phosgene is increased;
[0004] 2. The molar ratio of phosgene to methanol increases, the amount of phosgene tail gas is large, the pressure of the tail gas system is high, and the amount of liquid alkali and waste water is large;
[0005] 3. The content of methyl chloroformate in the existing process is 90%, and the quality is low;

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Synthesis process of methyl chloroformate
  • Synthesis process of methyl chloroformate
  • Synthesis process of methyl chloroformate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] see Figure 1-3 Shown, a kind of synthesis technique of methyl chloroformate specifically comprises the following steps:

[0036] Step 1, using two-level series reaction towers to synthesize, firstly, the inside of the first-level reaction tower 2 and the second-level reaction tower 3 are evacuated into a vacuum state through two gas guide pipes 11, and the inside of the first-level reaction tower 2 is adjusted by using the heating rod 84 The temperature of the first reaction tower is 20°C, then methanol is introduced into the interior of the first reaction tower 2 through the feed pipe 6 on the first reaction tower 2, and the feed assembly 5 at the right end of the first reaction tower 2 is used to feed the first reaction tower 2 A mixture of methanol and phosgene is passed inside;

[0037] Step 2, the mixture of methanol and phosgene enters the distribution ring 53 through the feed pipe 51, and finally the mixture is ejected through the feeding holes on the distribut...

Embodiment 2

[0040] see Figure 1-3Shown, a kind of synthesis technique of methyl chloroformate specifically comprises the following steps:

[0041] Step 1, using two-level series reaction towers to synthesize, firstly, the inside of the first-level reaction tower 2 and the second-level reaction tower 3 are evacuated into a vacuum state through two gas guide pipes 11, and the inside of the first-level reaction tower 2 is adjusted by using the heating rod 84 The temperature of the first reaction tower is 30°C, and then methanol is introduced into the interior of the first reaction tower 2 through the feed pipe 6 on the first reaction tower 2, and at the same time, the feed assembly 5 at the right end of the first reaction tower 2 is used to supply A mixture of methanol and phosgene is passed inside;

[0042] Step 2, the mixture of methanol and phosgene enters the distribution ring 53 through the feed pipe 51, and finally the mixture is ejected through the feeding holes on the distribution ...

Embodiment 3

[0045] see Figure 1-3 As shown, the two-stage series reaction tower comprises a fixed frame 1, a primary reaction tower 2, a secondary reaction tower 3 and a receiving box 4, and the primary reaction tower 2 and the secondary reaction tower 3 are all fixed on the top of the fixed frame 1, And the primary reaction tower 2 and the secondary reaction tower 3 are arranged side by side, the right ends of the primary reaction tower 2 and the secondary reaction tower 3 are connected with the feed assembly 5, and the primary reaction tower 2 and the secondary reaction tower 3 peripheral surfaces The left side of each is connected with feed pipe 6, and the left end of primary reaction tower 2 is connected with discharge pipe-7, and one end of discharge pipe-7 runs through the middle part of secondary reaction tower 3 and extends to secondary reaction tower 3 The inside of the first reaction tower 2 and the second reaction tower 3 are rotatably connected with a synthesis component 8 . ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a synthesis process of methyl chloroformate. The synthesis process adopts a two-stage tandem type reaction tower for synthesis. First, the interiors of a first-stage reaction tower and a second-stage reaction tower are vacuumized through two gas guide pipes; according to the synthesis process of methyl chloroformate, phosgene is introduced through a distribution ring, phosgene unit consumption can be effectively reduced, cost is saved, a new synthesis process is adopted, half of methanol is added into the first-stage reaction tower firstly, then methanol and phosgene ina certain proportion are introduced from the bottom of the tower at the same time, and the reaction temperature is controlled to be 20 to 30 DEG C; methyl chloroformate produced by reaction flows into the middle part of the second-stage reaction tower from the top of the first-stage reaction tower, a certain flow of phosgene is introduced from the bottom of the second-stage reaction tower, substances generated by side reaction are removed by reaction, and generated high-content methyl chloroformate flows into a receiving box from the top of the second-stage reaction tower, so that the qualityof methyl chloroformate can be effectively improved; meanwhile, the consumption of raw materials and the pressure load of tail gas damage are reduced, and the effects of saving energy and reducing consumption are achieved.

Description

technical field [0001] The invention relates to the technical field of material synthesis technology, in particular to a synthesis technology of methyl chloroformate. Background technique [0002] Methyl chloroformate, also known as methyl chlorocarbonate, has the molecular formula C 2 h 3 ClO 2 The molecular weight is 94.5, the boiling point is 70-72°C, the melting point is 61°C, and the relative density is 1.22. Methyl chloroformate is a colorless, transparent liquid with a pungent smell. It is soluble in water and gradually decomposed by water. Methyl chloroformate A glass-lined reaction tower is generally used for the mass production of chloroform, and methanol is first added to the tower, and the reaction temperature is controlled at 20-30°C, and then methanol and phosgene are ventilated from the bottom of the tower in the same direction to obtain methyl chloroformate. The reaction tail gas of this method adopts condenser freezing to catch, and the reaction formula o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C07C68/02C07C69/96
CPCC07C68/02C07C69/96
Inventor 王争强庞有顺程伟家潘荣欢邵辉望李健刘长庆朱光文胡梓杨李行
Owner ANHUI GUANGXIN AGROCHEM