Compositions based on 1,1,3,3-tetrachloropropene

Patent metadata

Field	Value
Publication number	US-2018148394-A1
Application number	US-201615575980-A
Country	US
Kind code	A1
Filing date	May 4, 2016
Priority date	May 22, 2015
Publication date	May 31, 2018
Grant date	—

Abstract

The present invention relates to compositions based on F-1230za (1,1,3,3-tetrachloropropene), or on a mixture consisting of F-1230za and F-1230zd (1,3,3,3-tetrachloropropene), the manufacture thereof, and also the use thereof in particular for the production of F-1233zdE (trans-1-chloro-3,3,3-trifluoropropene), F-1234zeE (trans-1,3,3,3-tetrafluoropropene), and/or F-245fa (1,1,1,3,3-pentafluoropropane).

First claim

1 . A composition comprising at least 99.5% by weight of 1,1,3,3-tetrachloropropene (F-1230za), or a mixture of 1,1,3,3-tetrachloropropene and of 1,3,3,3-tetrachloropropene (F-1230zd), and at least one additional compound chosen from a list of compounds consisting of pentachloropropanes, tetrachloropropenes other than F-1230za and F-1230zd, chlorobutenes, chlorobutanes and oxygenated compounds, said compound and/or the total amount of said compounds being present in the composition in a content of less than or equal to 0.5% by weight.

2 . The composition as claimed in claim 1 , in which said additional compound represents a content of less than or equal to 1000 ppm, in the composition.

3 . The composition as claimed in claim 2 , in which said additional compound is or are chosen from 1,1,1,3,3-pentachloropropane (F-240fa), 1,1,1,2,3-pentachloropropane (F-240db) and 1,1,2,3-tetrachloropropene (F-1230xa).

4 . A process for manufacturing the composition as claimed in claim 1 , comprising the following steps:
reaction of carbon tetrachloride with vinyl chloride to produce 1,1,1,3,3-pentachloropropane (F-240fa); dehydrochlorination of F-240fa to obtain 1,1,3,3-tetrachloropropene (F-1230za); one or more steps for separating out the F-1230za.

5 . A process for manufacturing the composition as claimed in claim 1 , comprising the following steps:
reaction of carbon tetrachloride with ethylene to produce 1,1,1,3-tetrachloropropane (F-250fb); chlorination of F-250fb to obtain 1,1,1,3,3-pentachloropropane (F-240fa); dehydrochlorination of F-240fa to obtain 1,1,3,3-tetrachloropropene (F-1230za); one or more steps for separating out the F-1230za.

6 . The process as claimed in claim 4 , in which the separation is performed by distillation or extraction, and/or by physicochemical separation on molecular sieves, alumina or active charcoal, and/or by membrane separation, optionally in the gas phase.

7 . The process as claimed in claim 6 , in which a first separation step is performed via one or more distillations and a second separation step is performed by adsorption on molecular sieves, on active charcoal or on a mixture thereof.

8 . The process as claimed in claim 6 , in which the separation step is performed by adsorption on zeolite, and optionally followed by gas-phase membrane separation.

9 . The process as claimed in claim 6 , in which the step of separation by adsorption is performed at a temperature of between 0 and 120° C.

10 . The use of the composition as claimed in claim 1 in the manufacture of 1-chloro-3,3,3-trifluoropropene (F-1233zd), 1,3,3,3-tetrafluoropropene (F-1234ze) or 1,1,1,3,3-pentafluoropropane (F-245fa).

11 . A process for manufacturing 1-chloro-3,3,3-trifluoropropene (F-1233zd), and/or 1,3,3,3-tetrafluoropropene (F-1234ze) and/or 1,1,1,3,3-pentafluoropropane (F-245fa), by fluorination performed in the liquid phase and in the absence of catalyst, comprising the steps:
introducing into a fluorination reactor a stream comprising the composition as claimed in claim 1 .

12 . The process as claimed in claim 11 for forming trans-1-chloro-3,3,3-trifluoropropene (F-1233zdE) or trans-1,3,3,3-tetrafluoropropene (F-1234zeE).

13 . The process as claimed in claim 11 , followed by one or more steps for separating 1-chloro-3,3,3-trifluoropropene (F-1233zd), and/or 1,3,3,3-tetrafluoropropene (F-1234ze) and/or 1,1,1,3,3-pentafluoropropane (F-245fa) from the stream of products.

Assignees

• Arkema France

Inventors

• Pigamo Anne
• Collier Bertrand

Classifications

• C07C17/383

  by distillation · CPC title

• C07C17/25

  by splitting-off hydrogen halides from halogenated hydrocarbons · CPC title

• C09K5/045

  containing only fluorine as halogen · CPC title

• C07C17/206 Primary

  the other compound being HX · CPC title

• C09K5/044

  comprising halogenated compounds · CPC title