Nissan Chemical Industries Limited

Kouichi Maeda

Kazumi Tsubaki

Noriaki Koto

A process for producing chlorobenzene sulfochloride comprises adding a reaction mixture of chlorobenzene and chlorosulfonic acid to water or diluted sulfuric acid to decompose excess chlorosulfonic acid; driving off hydrogen chloride thereby generated, from the system; bringing the sulfuric acid concentration in the sulfuric acid layer upon completion of the decomposition to be from 60 to 90%; and then separating chlorobenzene sulfochloride. The process is characterized in that the excess chlorosulfonic acid is decomposed at a temperature of from 40.degree. to 85.degree. C. and the chlorobenzene sulfochloride is separated in a liquid state at a temperature of from 60.degree. to 80.degree. C.

Process for producing chlorobenzene sulfochloride

A powdery isotactic polyolefin having high isotactic characteristic and high bulk density and a narrow size distribution is produced by forming a polymerization catalyst system by reacting a Grignard reagent with a chain or cyclic hydropolysiloxane having the unit ##EQU1## (R.sup.1 represents an alkyl, aryl, aralkyl, alkoxy or aryloxy group; a is 0, 1 or 2; b is 1, 2 or 3 and a+b.ltoreq.3) to form a reaction product (a); reacting the reaction product (a) with at least one compound having the formula

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Kouichi Maeda