Patent ID: 6331518
Filing Date: 2001-12-18
Classification: C11D

Abstract:
A method for preparing a water-containing solid detergent, the method comprising:providing aqueous 42 to 55% lye in a quantity of 21 to 70% by weight;mixing with the aqueous lye compound of formula (I), compound of formula (II), or a combination thereof to achieve a quantity of this compound or combination of 0.5 to 40% by weight and to form a first mixture;formula (I) being:HOCH.sub.2 CH(R.sup.1)OR.sup.2 (I)in which R.sup.1 is a hydrogen atom or a methyl group, andR.sup.2, independent of R.sup.1, is a hydrogen atom, a C.sub.1-4 alkyl group, a group CH.sub.2 CH(R.sup.3)OR.sup.4, or a group CH.sub.2 CH(R.sup.5)OCH.sub.2 --CH(R.sup.6)OR.sup.7, where R.sup.3, R.sup.5, and R.sup.6 represent hydrogen atoms or methyl groups and R.sup.4 and R.sup.7 represent hydrogen atoms or C.sub.1-4 alkyl groups;formula (II) being:[(HOCH.sub.2 CH)(R.sup.8).sub.3-x ]NH.sub.x (II)in which R.sup.8 is a hydrogen atom or a methyl group, andx is the number 0, 1 or 2;adding to the first mixture foam inhibitor followed by the addition of 15% to 60% by weight, based on the weight of the detergent, of a building component to form second mixture;adding to the second mixture as a component: 0.1% to 8% by weight, based on the weight of the detergent, of paraffin oil, 1% to 20% by weight, based on the total weight of the detergent, of surfactant, 0.1% to 10% by weight, based on the total weight of the detergent, of a polyhydroxy compound, or a combination thereof; to form third mixture;adding to the third mixture solid alkali metal hydroxide to achieve 2% to 25% by weight of the alkali metal hydroxide and to form the detergent;wherein % by weight is based on the weight of the detergent.