- Document Number:
20220017458
- Appl. No:
17/299764
- Application Filed:
December 05, 2019
- Abstract:
The present invention relates to a method for recycling and/or disposal of halocarbons, particularly fluorinated alkanes, such as trifluoromethane, by reacting said halocarbons with sulfur trioxide, particularly to form halide sulfonic acids and sulfur dioxide.
- Claim:
1. A method for conversion of halocarbons, comprising the steps of reacting a halocarbon with SO3.
- Claim:
2. The method according to claim 1, wherein the SO3 is present as oleum.
- Claim:
3. The method according to claim 1, characterized in that the halocarbon is reacted with sulfur trioxide to form the corresponding halide sulfonic acid.
- Claim:
4. The method according to claim 1, characterized in that the halocarbon is a hydrocarbon in which at least one H-atom is replaced by a halogen, said hydrocarbon being selected from an alkane, an alkene, or an alkyne, wherein said hydrocarbon can be linear, branched or cyclic, substituted or un-substituted.
- Claim:
5. The method according to claim 1, characterized in that the molecular ratio between sulfur trioxide and halocarbon is in the range of from 1 to 100.
- Claim:
6. The method according to claim 1, characterized in that the halocarbon is reacted with sulfur trioxide at a temperature of 0 to 200° C.
- Claim:
7. The method according to claim 1, characterized in that the halocarbon is reacted with sulfur trioxide at a pressure of 1 to 200 bar.
- Claim:
8. The method according to claim 1, characterized in that the halocarbon is a fluorinated, brominated or chlorinated derivative of an alkane.
- Claim:
9. The method according to claim 1, characterized in that the halocarbon comprises a single or multiple halogen atoms, wherein one or more of the carbon atom of the halocarbon are bonded to one or more halogen atoms.
- Claim:
10. The method according to claim 1, characterized in that the halocarbon is a halogenated derivative of a branched or unbranched alkane with a carbon number in the range of from 1 to 20, especially with a carbon number in the range of from 1 to 10.
- Claim:
11. The method according to claim 2, wherein a peroxide compound is added to the reaction mixture comprising halocarbon and oleum.
- Claim:
12. The method according to claim 11, wherein the peroxide is added stoichiometrically if the halocarbon comprises more than 1 C-atom, and the peroxide is added sub-stoichiometrically if the halocarbon comprises 1 C-atom.
- Claim:
13. The method according to claim 1, wherein sulfated intermediates occur during the reaction.
- Claim:
14. The method according to claim 13, wherein the sulfated intermediate is separated from the reaction mixture.
- Claim:
15. The method of claim 1, further comprising recycling or disposing of a reaction product of the conversion of halocarbons.
- Claim:
16. The method of claim 15, characterized in that the halocarbon is a fluoroalkane.
- Claim:
17. The method according to claim 6, characterized in that the halocarbon is reacted with sulfur trioxide at a pressure of 1 to 200 bar.
- Claim:
18. The method according to claim 2, characterized in that the halocarbon is reacted with sulfur trioxide to form the corresponding halide sulfonic acid.
- Claim:
19. The method according to claim 6, characterized in that the halocarbon is reacted with sulfur trioxide at a temperature of 80° C. to 125° C.
- Claim:
20. The method according to claim 1, wherein the halocarbon is a CF3H.
- Current International Class:
07
- Accession Number:
edspap.20220017458
Processing Request
No Comments.