C - Chemistry – Metallurgy – 11 – D
Patent
C - Chemistry, Metallurgy
11
D
134/19
C11D 1/22 (2006.01) C11D 3/065 (2006.01) C11D 11/04 (2006.01) C11D 17/00 (2006.01)
Patent
CA 1333245
Laundry detergent bars are formulated with linear alkyl benzene sulfonate and detergent builders. The process comprises the steps of: (a) supplying substan- tially anhydrous linear alkyl benzene sulfonic acid, the linear alkyl chain of which contains from about 8 to about 20 carbon atoms; (b) neutralizing the afore- mentioned sulfonic acid with a subtantially anhydrous granular base selected from the group consisting of alkali metal carbonates, alkali metal bicarbonates, and mixtures thereof to form alkali metal linear alkyl benzene sulfonate; (c) blending detergent builder with the aforementioned sulfonate; and (d) preparing laundry detergent bars from the thus formed mixture of detergent builder and alkali metal linear alkyl benzene sulfonate. Importantly, any water which is blended with the alkali metal linear alkyl benzene sulfonate subsequent to the neutralization step mentioned above must be in the form of water of hydration of a material such as an inorganic builder salt used in the formulation. The resulting bars comprise from about 5% to about 50% alkali metal linear alkyl benzene sulfonate and from about 10% to about 85% detergent builder.
538834
Kirby Eades Gale Baker
The Procter & Gamble Company
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