EP 0203526 B1 19910123 - COMPOUNDS IN MELTED BLOCK FORM CONTAINING ALKALINE HYDROXIDE AND ACTIVE CHLORINE FOR MACHINE DISH-WASHING, AND PROCESS FOR THEIR PREPARATION
Title (en)
COMPOUNDS IN MELTED BLOCK FORM CONTAINING ALKALINE HYDROXIDE AND ACTIVE CHLORINE FOR MACHINE DISH-WASHING, AND PROCESS FOR THEIR PREPARATION
Publication
Application
Priority
DE 3519355 A 19850530
Abstract (en)
[origin: US4729845A] Detergents for dishwashing machines in the form of fused blocks containing alkali metal hydroxides, alkali metal silicates, and from 0.2 to 4% by weight of active chlorine donors having a hydrolysis constant of 3x10-4 or lower (preferably Na- or K-dichloroisocyanurate, Na-dichloroisocyanurate dihydrate, Na-monochloroamido-sulfonate or Na-N-chloro-p-toluene sulfonic acid amide). The process of making the fused blocks comprises heating metasilicate or waterglass solution with or without solid alkali metal hydroxide to 45 DEG to 48 DEG C., allowing the reaction temperature to rise to 60 DEG to 65 DEG C., adding the remaining ingredients including the active chlorine donor at 50 DEG to 65 DEG C., pouring the still liquid melt into flexible molds and allowing it to solidify into blocks therein. The detergent blocks of the invention have good stability to storage and a high dissolving rate in use.
IPC 1-7
IPC 8 full level
C11D 3/04 (2006.01); C11D 3/08 (2006.01); C11D 3/395 (2006.01); C11D 17/00 (2006.01)
CPC (source: EP US)
C11D 3/08 (2013.01 - EP US); C11D 3/3955 (2013.01 - EP US); C11D 17/0052 (2013.01 - EP US)
Citation (examination)
Kirk-Othmer:"Encyclopedia of Chemical Technology", Band 4, Seiten 912, 913
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL
DOCDB simple family (publication)
EP 0203526 A2 19861203; EP 0203526 A3 19880323; EP 0203526 B1 19910123; AT E60355 T1 19910215; DE 3519355 A1 19861204; DE 3677058 D1 19910228; US 4729845 A 19880308
DOCDB simple family (application)
EP 86106948 A 19860522; AT 86106948 T 19860522; DE 3519355 A 19850530; DE 3677058 T 19860522; US 86882186 A 19860529