PURPOSE: In the continuous thin-film sulfation with an SO3-containing gas, moistured air or steam is introduced into or immediately before the gas-liquid separator to effect the reaction whereby the sulfated product of an organic compound is obtained in the state of lightly colored condition.
CONSTITUTION: An organic feedstock 1 such as an alpha-olefin of 10W23 carbon atoms or a higher alcohol of 8W24 carbon atoms is allowed to react with an SO3-containing gas 2 introduced into a thin-film reactor 3 and moistured air or steam is introduced into or immediately before the gas-liquid separator 4 at the parts 5, 5' and 5" to obtain the objective compound from 6. 7 is exausted gas outlet, 8 is cooling water inlet 9, is its outlet. The amount of water inmoistened air or of steam is 1W10, preferably 2W5 times the equivalent quantity of the remaining SO3.
KUNIKAWA KENZO
KASAI HISASHI
KUSUMI TOMOKATSU
