Method for producing detergent cakes

Claim 1

A PROCESS FOR THE PRODUCTION OF CLEANINGS CAKES COMPRISING REACTING APPROXIMATELY STIOCHROMETRIC QUANTITIES OF A BUTENEDIOIC ACID OF ANHYDRIDE AND A COMPOUND HAVING THEREIN A REACTIVE HYDROXYL GROUP AND AN ACYCLIC CHAIN AT LEAST PREDOMINATELY OF 12 CARBON ATOMS AT A TEMPERATURE BETWEEN THE MELTING POINT OF SAID ACID OR ANHDRIDE AND ABOUT 100*C. TO PRODUCE A MONOALKYL ESTER OF BUTENEDIOC ACID, REACTING STOICHIOMETRIC QUANTITIES OF SAID MONOALKYL ESTER WITH A SULFITE CHOSEN FROM THE GROUP CONSISTING OF ALKALI METAL, AMMONIUM AND ALKALINE EARTH METAL SULFITES AND BISULFITES IN THE PRESENCE OF FROM 5 TO 60% BY WEIGHT OF A MOLTEN PLASTICIZER CHOSEN FROM THE GROUP CONSISTING OF FATTY ACID ESTES OF POLYHYDRIC ALCOHOLS AND PARAFFIN WAX AND MIXTURES THEREOF AND FROM ABOUT 15 TO 20% BY WEIGHT OF WATER AT A TEMPERATURE FROM ABOUT 90*C TO ABOUT 100*C. TO FORM A WATER-SOLUBLE MONALKYLSULFOSUCCINATE, COOLING THE RESULTING PRODUCT, DRYING THE RESULTING PRODUCT, AND FORMING THE COOLED PRODUCT INTO CAKES, SAID CAKES INCLUDING AT LEAST ABOUT 40% OF SAID MONOALKYLSULFOSUCCINATE BY WEIGHT.