Lion Corporation

Toshimi Terao

Kyozo Kitano

Katsumasa Nagano

Kentaro Kiyama

Fusao Kondo

Fumihiro Mikuchi

A method for sulfonating olefins comprising the steps of mixing (A) internal olefins having 8 to 22 carbon atoms with (B) alpha-olefins having an average carbon atom number, larger by 3 to 7 than that of the internal olefins (A) in a weight ratio of (A)/(B)=95/5 to 5/95, and sulfonating the resultant mixture with a sulfonating agent. Thus, internal olefins can be sulfonated at a high conversion.

Olefin sulfonation method

A method for sulfonating polystyrene having an average molecular weight of 200 to 50,000 in a halogenated hydrocarbon solvent comprising the step of reacting the polystyrene with a sulfonating agent under a condition of a shearing force of 0.08 to 1.5 N/cm.sup.2 by using an agitator satisfying the following requirements (I) and (II):

Sulfonation method of polystyrene

Alkylbenzene is sulfonated in a thin film type sulfonation process by adding 2 through 20 parts by weight, based on 100 parts by weight of said alkylbenzene, of alkylbenzene sulfonic acids having alkyl groups of 1 through 20 carbon atoms and/or benzene sulfonic acids to the alkylbenzene prior to the contact thereof with diluted gaseous sulfur trioxide. The addition of alkylbenzene sulfonic acids and/or benzenesulfonic acid effectively prevents the formation of adherent deposits on the surface of a reaction wall.

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Chiba, Japan

Toshimi Terao