F141b crude stabilization
AssigneeElf Atochem North America, Inc.
InventorsWayne E. Brooks, Craig Jolley
Life of this patent
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Abstract
Separation of 1,1-dichloro-1-fluoroethane (141b) from lower boiling components contained in a crude 141b feed stream mixture by adding the feed stream mixture, and, based upon the weight of 141b in the feed stream mixture, between 100 and 300 ppm of a component that will inhibit formation of 1,1-difluoro-1-chloroethane into a feed line of a distillation column operated at between 3 and 165 psig pressure with a temperature between 100.degree. F. and 250.degree. F. in the bottom reboiler section of the column.
Claims4
A method for separating 1,1-dichloro-1fluoroethane (141b) from lower boiling components contained in a crude 1,1-dichloro-1-fluoroethane feed stream mixture consisting essentially of the steps of:
- selecting a component that will inhibit formation of 1,1-difluoro-1-chloroethane during heating of 1,1-dichloro-1-fluoroethane;
- adding said component in the range consisting of from 100 to 300 ppm of said component, based on the weight of 1,1-dichloro-1-fluoroethane in said feed stream mixture, to said feed stream mixture so as to suppress conversion of 1,1-dichloro-1-fluoroethane to 1,1-difluoro-1-chloroethane;
- introducing said component and said feed stream mixture into a feed line of a distillation column;
- and
- maintaining the temperature of a bottom reboiler section of said column between 100.degree. F. and 250.degree. F. and the pressure between 3 and 165 psig whereby formation of 1,1-difluoro-1-chloroethane is inhibited.
Dependencies are inferred from the claim text.