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A kind of gas phase preparation method of 1,1,2,3-tetrachloropropene

A technology of tetrachloropropene and gas phase, which is applied in the field of gas phase preparation of 1,1,2,3-tetrachloropropene, which can solve the problems of large amount of "three wastes", low conversion selectivity, and serious equipment corrosion

Active Publication Date: 2021-06-15
JUHUA GROUP TECH CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • A kind of gas phase preparation method of 1,1,2,3-tetrachloropropene

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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 reactor outlet 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 results are ...

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Abstract

The invention discloses a gas-phase preparation method of 1,1,2,3-tetrachloropropene. Under the action of a catalyst, 1,1,1,2,3-pentachloropropane undergoes a gas-phase catalytic dehydrochlorination reaction, and the reaction The temperature is 150-250° C., the contact time is 1-15 seconds, and the reaction product is collected and rectified under reduced pressure to obtain 1,1,2,3-tetrachloropropene product. The invention has the advantages of simple process, good catalyst activity, long service life, environmental protection and easy industrialization.

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

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Application Information

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Patent Type & Authority Patents(China)
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
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