2418-22-6

Usage

Physical state

Colorless liquid

Isomeric forms

E and Z

Uses

Production of fluoropolymers, building block for creating unique organic molecules

Hazards

Causes irritation to skin, eyes, and respiratory system; potential harmful effects on the environment

Handling precautions

Handle with care and dispose of properly according to local regulations.

Upstream product

• 354-58-5 1,1,1-Trichloro-2,2,2-trifluoroethane 
• 87-68-3 Hexachlorobutadiene 
• 7736-43-8 trans-2-chloro-1,1,1,4,4,4-hexafluorobutene-2 
• 303-04-8 2,3-dichloro-1,1,1,4,4,4-hexafluoro-2-butene 

Downstream Products

• 692-50-2 hexafluoro-2-butyne 

Relevant academic research and scientific papers

Preparation method of Z-1,1,1,4,4,4-hexafluoro-2-butene

The invention relates to a preparation method of Z-1,1,1,4,4,4-hexafluoro-2-butene, belonging to the field of chemical synthesis. The method comprises the following steps of taking hexachlorobutadiene (HCBD) as a raw material, performing gas-phase catalytic chlorination-fluoridation separation to obtain 2,3-dichlorohexafluoro-2-butene, performing liquid-phase dechlorination to obtain hexafluoro-2-butyne, and preparing the Z-1,1,1,4,4,4-hexafluoro-2-butene (Z-HFO-1336mzz) by means of performing gas-phase catalytic hydrogenation, wherein three reactions are included totally. The Z-1,1,1,4,4,4-hexafluoro-2-butene with high selectivity is obtained by means of performing catalytic hydrogenation by adopting the hexafluoro-2-butyne, and meanwhile the product is easily separated from side products and the raw material. The method disclosed by the invention has the advantages that the original raw material is easily obtained, the activity of a catalyst is high, the service life of the catalyst is long, the raw material can be recycled, and the standard of zero emissions is reached.

PROCESS OF CHLORINATING HYDROCHLOROFLUOROOLEFIN TO PRODUCE CHLOROFLUOROOLEFIN

The present disclosure provides a process for the preparation of chlorofluoroolefin. The process involves chlorinating a hydrochlorofluoroolefin of the formula R1CH=CCIR2 to produce a product mixture comprising a chlorofluoroolefin of the formula R1CCI=CCIR2; wherein R1 and R2 are perfluoroalkyi groups independently selected from the group consisting of CF3, C2F5, n-C3F7, i-C3F7, n-C4F9, i-C4F9 and t- C4Fg.

Catalytic synthesis of polyfluoroolefins

A catalytic synthesis of polyfluoroolefins was developed proceeding from polyfluorochlorocarbons with the use of industrially produced nickel-chromium catalyst. Three ways of the catalytic synthesis of fluoroolefins were implemented: the cleavage of vicinal chlorine atoms from polyfluorochlorocarbons, the replacement of vinyl chlorine atoms by hydrogen in fluorochloroolrfins, and the reductive dimerization of polyfluorochlorocarbons containing a trichloromethyl group. The condition of a prolonged operation of the nickel-chromium catalyst was found consisting in the application of quartz for absorption of the hydrogen fluoride formed as a side product.

Method of Hydrodechlorination to Produce Dihydrofluorinated Olefins

Disclosed herein is a process for the preparation of fluorine-containing olefins comprising contacting a chlorofluoroalkene with hydrogen in the presence of a catalyst at a temperature sufficient to cause replacement of the chlorine substituents with hydrogen. Also disclosed is a catalyst composition for the hydrodechlorination of chlorofluoroalkenes comprising copper metal deposited on a support.