METHOD OF SYNTHESIS OF WATER-SOLUBLE SULFONATED DISPERSERS Russian patent published in 1998 - IPC

Abstract RU 2117003 C1

FIELD: chemical technology. SUBSTANCE: method involves interaction of sulfur trioxide with aromatic fractions at mass ratio (0.8-1.5):1 at 5-45 C in the presence of sulfur dioxide. After sulfur dioxide removal sulfonation product is heated to 70-110 C and kept at this temperature for 10-200 min. Stages of interaction, sulfur dioxide removing, heating and keeping are carried out under conditions providing grinding and the forced moving the sulfonation solid product. Stage of oxidative oligomerization is carried out without solvent using. EFFECT: improved method of synthesis. 7 cl, 2 tbl

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RU 2 117 003 C1

Authors

Armando Markotullio

Ehnriko Borgarello

Roberto Trotta

Ehlio Donati

Dates

1998-08-10—Published

1994-03-14—Filed