Patent · US Expired

Method for producing anionic surfactant granulates

US6140302A · kind A · utility

16Cited by

1References

26Claims

0Family size

Assignee

Cognis Deutschland GmbH · DE

Inventors

Thomas Lueder · Langenfeld, DE
Bernhard Gutsche · Hilden, DE
Konstantinos Scholinakis · Düsseldorf, DE

Key dates

Filing date	Oct 29, 1999
Grant date	Oct 31, 2000
Priority date	—
Expiry date	Oct 29, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC11D11/04
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for the production of anionic surfactant granules comprising the steps of: PA1 A) Neutralizing an acidic anionic surfactant with a base in a horizontal thin-layer evaporator or thin-layer dryer; and PA1 B) Drying the resulting neutralized anionic surfactant in the evaporator or dryer to form surfactant granules; wherein the acidic anionic surfactant and the base taken together have a solids content such that the total quantity of water in the evaporator or dryer at no time exceeds about 15 % by weight and wherein the neutralization and drying are carried out in countercurrent flow with air or an alkaline gas stream at a temperature in the range of from about 120 to about 130.degree. C.

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