Patent · US Expired

Deinking wastepaper using alkoxylation product of carboxylic acid containing an OH group and alkylene oxide

US5221433A · kind A · utility

15Cited by

2References

13Claims

0Family size

Assignee

Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

Peter Daute · Beverstedt, DE
Gerhard Stoll · Winnenden, DE
Klaus Hornfeck · Mettmann, DE

Key dates

Filing date	Jan 13, 1992
Grant date	Jun 22, 1993
Priority date	—
Expiry date	Jan 13, 2012

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/64
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

According to the invention, wastepaper is refined in the presence of alkoxylation products obtainable by reaction of alkylene oxides with C.sub.10-22 carboxylic acid derivatives and/or C.sub.10-22 carboxylic acids containing carboxylic acid residues with at least one OH group in the 9, 10, 13 and/or 14 position and the detached printing ink particles are subsequently removed from the paper stock suspensions by flotation or washing.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.