Patent ID: 6521084
Filing Date: 2003-02-18
Classification: D21C

Abstract:
A process for producing pulp from fibrous materials, wherein the fibrous materials are reacted with a chemical digesting solution in the presence of organosilicon compounds which are selected from organopolysiloxane compounds comprising units of the general formulae (I) to (VII)R3SiO1/2(I),R2SiO(II),RSiO3/2(III),SiO4/2(IV),R2Râ€²SiO1/2(V),RRâ€²SiO(VI),Râ€²SiO3/2(VII),whereR is a monovalent hydrocarbon radical having from 1 to 18 carbon atoms, Râ€² is a monovalent radical of the general formulae (VIII), (IX), (X) or (XI) â€ƒin which R1 is a divalent C1- to C18-hydrocarbon radical R2 is a hydrogen atom or a monovalent C1- to C6-alkyl radical, R3 is a hydrogen atom, a monovalent C1- to C6-acyl radical, C1- to C6-hydrocarbon radical, or OSO3X, X is a hydrogen atom, alkali metal ion or ammonium ion which is optionally substituted by C1- to C18-hydrocarbon radicals, Z is a glycosidyl radical composed of from 1 to 10 mono saccharide units, a has a value 1, 2, 3, 4 or 5, b has a value from 0 to 200, c has a value 0 or 1 and d has a value 0, 1, 2, 3 or 4, with the proviso that the organopolysiloxane compounds have at least one unit of the general formulae (V) to (VII), or from organosilanes of the general formula (XII)R3SiRâ€²â€ƒâ€ƒ(XII) in whichRâ€² is a monovalent radical of general formula (VIII) and R is a monovalent hydrocarbon radical having from 1 to 18 carbon atoms.