Patent ID: 7579311
Filing Date: 2009-08-25
Classification: C07C,C11D

Abstract:
1. A no-strip process for producing a bar base having about 20-70% by wt. final bar acyl isethionate and about 15-35% by wt. free fatty acid and wherein the bar has lather of at least 80 ml lather volume as measured by the Bar Lather Appraisal Method and bar has grit of no more than 10 grit particle at 35° C. as measured by Bar wash Down Procedures, wherein said process comprises: (1) producing a directly esterified fatty acid isethionate (DEFI) by reacting fatty acid with alkali metal isethionate or ammonium isethionates in a reactor according to reaction shown: (2) adding solution of a neutralizing agent to said molten DEFI solution at a temperature of about 25° C., said agent being selected from the group consisting of metal hydroxides, metal oxides and mixtures thereof in an amount sufficient to neutralize 10 to 90% of unreacted fatty acid and form in-situ soap, RCO (3) transferring acyl isethionate solution (comprising acyl isethionate, fatty acid, in-situ soap and metal isethionate) to container holding one or more ingredients which will be in base bar composition besides what is in acyl isethionate solution; (4) cooling reactants of (3) to form base bar chips.