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

Gas phase preparation method of 1,1,2,3-tetrachloropropene

A tetrachloropropene and gas phase technology, applied in the field of gas phase preparation of 1,1,2,3-tetrachloropropene, can solve the problems of unfavorable industrial production, low conversion rate selectivity, large amount of "three wastes", etc. Large production capacity, less “three wastes” and less isomer content

Active Publication Date: 2019-01-04
JUHUA GROUP TECH CENT
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the reaction time is long, the content of by-products is high, and the amount of "three wastes" is large, which is not conducive to industrial production.
The product 1,1,2,3-tetrachloropropene conversion rate (less than 85%) and selectivity of this method are all low (less than 75%), relatively serious to equipment corrosion and used catalyst life-span is short, is unfavorable for practical production application

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
  • Gas phase preparation method of 1,1,2,3-tetrachloropropene
  • Gas phase preparation method of 1,1,2,3-tetrachloropropene
  • Gas phase preparation method of 1,1,2,3-tetrachloropropene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10

[0029] A 10mm catalyst is loaded into a reactor equipped with a preheater and an electric heating module, and a thermocouple is inserted into the center of the catalyst bed to monitor the reaction temperature. Feed 1,1,1,2,3-pentachloropropane into the reactor for reaction, collect the reaction product and rectify under reduced pressure, collect the fraction at 96°C to 98°C (vacuum degree -0.097Mpa) to obtain 99.9 % purity 1,1,2,3-tetrachloropropene product. Samples were taken from the outlet of the reactor for GC analysis. The results of different catalysts and different reaction conditions are shown in Table 1.

[0030] Table 1 The results of different catalysts and reaction conditions

[0031]

[0032] Note: The total selectivity includes TCP and 2,3,3,3-tetrachloropropene isomers

[0033] Catalyst life investigation:

[0034] Choose BaCl 2 -HoCl 3 / C catalyst, under the conditions of 200 ℃ and contact time 7s, the life of it was investigated, and the specific resul...

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 gas phase preparation method of 1,1,2,3-tetrachloropropene. Under the effect of a catalyst, 1,1,1,2,3-pentachloropropane is subjected to a gas-phase catalytic dehydrochlorination reaction, the reaction temperature is 150-250 DEG C, the contact time is 1-15 seconds, and a reaction product is collected and subjected to decompression rectification to obtain the 1,1,2,3-tetrachloropropene product. The method has the advantages that the process is simple, the catalyst is good in activity and long in service life, and the method is environmentally friendly and easy to industrialize.

Description

technical field [0001] The invention relates to a preparation method of chlorinated olefins, in particular to a gas-phase preparation method of 1,1,2,3-tetrachloropropene. Background technique [0002] 1,1,2,3-Tetrachloro-propene (1,1,2,3-tetrachloro-propene, HCC-1230 or TCP), colorless transparent liquid, industrial products are often brownish yellow, CAS 10436-39-2, Molecular weight 179.86, molecular formula C 3 h 4 Cl 4 , boiling point 167.1 ℃, density 1.51g / ml, slightly soluble in water. [0003] 1,1,2,3-Tetrachloropropene (HCC-1230) was mainly used in the early preparation of the chemical herbicide "Avena" and the plant growth regulator 2,3,3-Trichloroallyltrimethylammonium chloride . In recent years, it has been found that it can be used as the main intermediate of a new generation of environmentally friendly refrigerant 2,3,3,3-tetrafluoropropene (HFO-1234yf). With the continuous expansion of the application field of 1,1,2,3-tetrachloropropene, its preparation p...

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): C07C21/04C07C17/25C07C17/38
CPCC07C17/25C07C17/38C07C21/04
Inventor 吕杨李宏峰马利勇张万宏徐晓波
Owner JUHUA GROUP TECH CENT