Method of neutralizing alkyl polyglycoside solutions
AssigneeHuels Aktiengesellschaft
InventorNorbert Ripke
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Abstract
The final mixture in the manufacture of alkyl polyglycosides comprises an acidic, non-aqueous solution of alkyl polyglycosides in long chain alcohols. The invention relates to a novel method of neutralizing these solutions. First, a small part of the solution is withdrawn and a mixture comprised of an alcohol or alcohol mixture having 1-6 C atoms and water is added thereto, the withdrawn part is neutralized with an aqueous-, alcoholic-, or aqueous-alcoholic alkali. The amount of alkali necessary to neutralize the alkyl polyglycoside solution is calculated and added to the alkyl polyglycoside solution.
Claims11
A method of neutralizing a continuous stream of acid solution of alkyl polyglycosides having alkyl groups with 8-24 C atoms in alcohols having 8-24 C atoms to a pH of 7-10, comprising withdrawing a side stream of up to about 20% of the continuous stream and adding thereto 2-10 times the amount withdrawn of a mixture of 50-90 wt. % alcohol or alcohol mixture having 1-6 C atoms and 50-10 wt. % water, then neutralizing said withdrawn side stream with an alkali selected for the group consisting of aqueous alkali, alcohol alkali, and aqueous-alcohol alkali, calculating the amount of alkali necessary to neutralize the continuous stream of alkyl polyglycoside solution based upon the amount of alkali required to neutralize the withdrawn side stream, and continuously adding the calculated amount of alkali to the continuous stream of alkyl polyglycoside solution.
Dependencies are inferred from the claim text.