Detergent alkylation process using a fluorided silica-alumina
AssigneeUop LLC
InventorJoseph A. Kocal
Life of this patent
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Abstract
A fluorided silca-alumina catalyst, particularly one with a silica:alumina ratio in the range of 1:1-9:1 containing from 1 to 6 weight percent fluoride, is particularly effective in the liquid phase alkylation of benzene to produce linear alkyl benzenes at temperatures no greater than 140.degree. C. Conversions in excess of 98% with selectivity exceeding 85% and linearity exceeding 90% may be achieved readily.
Claims15
A method for alkylating benzene with one or more linear monoolefins having from about 6 to about 20 carbon atoms with at least 98% conversion of olefins, at least 85% selectivity of olefin conversion to monoalkylbenzenes, and with at least 90% linearity with respect to monoalkylbenzene formation comprising reacting benzene with the linear monoolefins in a feedstock at alkylating conditions and in the presence of a catalyst, said feedstock containing at least one linear monoolefin, said alkylating conditions including reacting from about 5 to about 30 molar proportions of total benzene for each molar proportion of total linear monoolefins at a temperature from about 80.degree. C. to about 140.degree. C. and a pressure from about 200 to about 1000 psig, where the catalyst is a fluorided silica-alumina having a silica:alumina weight ratio of from about 1:1 to about 9:1 and contains from about 1 to about 6 weight percent fluoride.
A process for the production of a biodegradable detergent alkylbenzene sulfonate which comprises:
- alkylating benzene with at least one linear monoolefin containing from 6 to about 20 carbon atoms at alkylating conditions in an alkylation zone in the presence of a catalytic composite to selectively form monoalkylated benzenes, said catalytic composite being a fluorided silica-alumina having a silica:alumina weight ratio of from about 1:1 to about 9:1 and containing from about 1 to about 6 weight percent fluorine;
- sulfonating the monoalkylated benzenes in a sulfonation zone with a sulfonating agent at sulfonation conditions to form sulfonic acids of the monoalkylated benzenes;
- and reacting said sulfonic acids with an aqueous solution of an alkali metal base to form the monoalkylbenzene alkali metal sulfonate.
Dependencies are inferred from the claim text.