摘要:
This invention pertains to a method for removing acidic impurity from halogenated olefins, especially methods for removing acidic impurity from halogenated propenes, and even more particularly to methods for removing acidic impurity from 1,3,3,3-tetrafluoro-1-propene (HFO-1234ze), 2,3,3,3-tetrafluoro-1-propene (HFO-1234yf), 1-chloro-3,3,3-trifluoro-1-propene (HCFO-1233zd), and 2-chloro-3,3,3-trifluoro-1-propene (HCFO-1233xf). The method is conducted by passing the halogenated olefin stream, in liquid or gas form, through a solid adsorbent bed, which contains at least one acid reactive agent.
摘要:
This invention relates to a method to improve 1,1,3-trichloropropene (HCC-1240za) and/or 3,3,3-trichloropropene (HCC-1240zf) selectivity in the dehydro-chlorination of 1,1,1,3-tetrachloropropane (HCC-250fb). In normal practice, FeCl 3 is used as the catalyst for the dehydrochlorination of HCC-250fb to produce 1,1,3-trichloro-propene and/or 3,3,3-trichloropropene. Here the improvement comprises, using as the starting material, a mixture comprising HCC-250fb and Heavies generated from the reaction of CCl 4 and ethylene to produce HCC-250fb, wherein the Heavies comprise one or more tetrachloropentane isomers. These compounds reduce or eliminate the formation of unwanted high boiling compounds (HBCs).
摘要:
Disclosed is a process for making the compound l,l,2-trichloro-3,3,3-trifluoro- propane (233da) by the catalytic fluorination of 1,1, 1,2,3, 3-hexachloropropane. 233da is a starting material used in the production cis-l-chloro-3,3,3-trifluoropropene (cis- 1233zd).
摘要:
Disclosed is a process for making cis-1-chloro-3,3,3-trifluoropropene comprising reacting 3,3,3-trifluoropropyne with HCl in a reaction vessel at a yield of at least about 80%.
摘要:
The present invention provides a process of catalytic fluorination in gas phase of product 1,1,1,2,3- pentachloropropane or/and 1, 1, 2, 2, 3-pentachloropropane into product 2, 3, 3, 3-tetrafluoropropene in presence of a catalyst.
摘要:
The present invention provides a process for preparing 2, 3, 3, 3-tetrafluoropropene, comprising the following steps: (a) catalytic reaction of 1, 1, 1, 2, 3-pentachloropropane and/or 1, 1, 2, 2, 3-pentachloropropane with HF into product 2- chloro-3, 3, 3-trifluoropropene; (b) catalytic reaction of the thus-obtained 2-chloro-3, 3, 3-trifluoropropene into 2,3,3, 3-tetrafluoropropene.