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Process for purifying 1-chloro-3,3,3-trifluoropropene

A technology of trifluoropropene and trifluoropropane is applied in the field of purifying hydrochlorofluoroolefins, and can solve the problems of difficult separation, complicated and expensive purification steps and the like

Pending Publication Date: 2021-12-28
ARKEMA FRANCE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in relatively complex and expensive purification steps
The difficulties encountered during the purification of HCFO-1233zdE generally left behind a significant loss of the target product
In addition, by-products can form azeotropic compositions with HCFO-1233zdE, making separation by simple distillation very difficult, or even impossible

Method used

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  • Process for purifying 1-chloro-3,3,3-trifluoropropene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0071] According to a preferred embodiment, said starting composition comprises at least 10% by weight of said at least one chlorinated compound, based on the total weight of said starting composition. Said starting composition advantageously comprises at least 15% by weight of said at least one chlorinated compound, preferably at least 20% by weight of said at least one chlorinated compound, more preferably at least 25% by weight of said at least one A chlorinated compound, in particular at least 30% by weight of said at least one chlorinated compound, more particularly at least 35% by weight of said at least one chlorinated compound, preferably at least 40% by weight of said at least one a chlorinated compound, advantageously preferably at least 45% by weight of said at least one chlorinated compound, preferably preferably at least 50% by weight of said at least one chlorinated compound, especially preferably at least 55% by weight of said at least one chlorinated compound T...

Embodiment

[0153] The examples were carried out in a reactor (both thermally insulated) with a scrubber on top. The scrubber (inner diameter = 24 mm, height = 300 mm) is packed with Raschig rings (inner diameter = 3 mm, outer diameter = 5 mm, length = 5 mm, fraction of life in the packed column = 63%). The basic solution was introduced and turned in circles through a scrubber (approximately 185 ml / min) packed with Raschig rings. According to the embodiment, the alkaline solution is brought to a temperature of 30°C or 50°C. Then, 95.8 mol% trans-1-chloro-3,3,3-trifluoropropene, 2.4 mol% cis-1-chloro-3,3,3-trifluoropropene were introduced into the reactor at a flow rate of 5 g / h. Fluoropropene (i.e. trans / cis molar ratio of 39.9), approximately 120 ppm 1,1-dichloro-1,3,3-trifluoropropane and approximately 25 ppm 1-chloro-1,3,3-trifluoropropane Composition of propylene. The amounts of components of the compositions are expressed in moles. Said composition can be obtained by carrying ou...

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Abstract

The present invention relates to a process for neutralizing a composition A comprising 1-chloro-3,3,3-trifluoropropene, 1,1-dichloro-1,3,3-trifluoropropane and one or more acid compounds of formula HX with X = F or Cl; said process comprising the step a) of bringing said composition A into contact with a solution B under conditions capable of limiting the formation of 1-chloro-1,3,3-trifluoropropene.

Description

technical field [0001] The present invention relates to a process for the purification of hydrochlorofluoroolefins. In particular, the invention relates to a process for the purification of 1-chloro-3,3,3-trifluoropropene. The invention also relates to a process for the production of 1-chloro-3,3,3-trifluoropropene. Background technique [0002] 3,3,3-Trifluoro-1-chloropropene, or alternatively 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd), exists as two isomers: cis isomer isomer, namely Z-3,3,3-trifluoro-1-chloropropene (HCFO-1233zdZ), and the trans isomer, namely E-3,3,3-trifluoro-1-chloropropene (HCFO- 1233zdE). They have different boiling points of 18.5°C for the trans compound and 39.5°C for the cis compound, respectively. [0003] Fluids based on E-3,3,3-trifluoro-1-chloropropene (HCFO-1233zdE) find numerous applications in various industrial fields, especially as heat transfer fluids, propellants, blowing agents, foaming agents, gaseous dielectrics, monomeric or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C21/18C07C17/25C07C17/38
CPCC07C17/25C07C17/38C07C21/18C07C17/395C07C17/206
Inventor E.布萨里K.希斯勒A.皮加莫
Owner ARKEMA FRANCE SA