Process for 1,3,3,3-tetrafluoropropene
AssigneeHoneywell International Inc.
InventorsHaridasan K. Nair, Rajiv Ratna Singh, Andrew Joseph Poss, David Nalewajek
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Abstract
The present invention provides a simple three step process for the production of 1,3,3,3-tetrafluoropropene (HFO-1234ze). In the first step, carbon tetrachloride is added to vinyl fluoride to afford the compound CCl3CH2CHClF (HCFC-241fb). HCFC-241fb is then fluorinated with anhydrous HF to afford CF3CH2CHClF (HCFC-244fa) in the second step. Dehydrochlorination of HCFC-244fa, in the third step, affords the desired product, CF3CH═CHF (HFO-1234ze). Following similar chemistry, vinyl chloride may be used in place of vinyl fluoride.
Claims25
A process for the production of 1,3,3,3-tetrafluoropropene (HFO-1234ze) comprising the steps of:
- (a) reacting carbon tetrachloride with vinyl fluoride to afford the compound CCl3CH2CHClF (HCFC-241fb);
- (b) fluorinating HCFC-241fb with HF to afford the compound CF3CH2CHClF (HCFC-244fa);
- and
- (c) dehydrochlorinating HCFC-244fa to produce the compound CF3CH═CHF (HFO-1234ze).
A process for the production of 1,3,3,3-tetrafluoropropene (HFO-1234ze) comprising the steps of:
- (a) reacting carbon tetrachloride with vinyl chloride to afford the compound CCl3CH2CHCl2;
- (b) fluorinating the compound CCl3CH2CHCl2 to generate the compound CF3CH2CHClF (HCFC-244fa);
- and
- (c) dehydrochlorinating HCFC-244fa to produce the compound CF3CH═CHF (HFO-1234ze).
Dependencies are inferred from the claim text.