Patent · US Expired

Method for producing sodium perborate monohydrate

US5478544A · kind A · utility

6Cited by

4References

20Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Rudiger Schutte · Scheinfeld, DE
Alexander Ruhs · Rheinfelden (Baden), DE
Claas-Jurgen Klasen · Alzenau, DE
Hans Christian Alt · Gelnhausen, DE

Key dates

Filing date	Jun 7, 1995
Grant date	Dec 26, 1995
Priority date	—
Expiry date	Jun 7, 2015

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/10
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Method and apparatus for producing sodium perborate monohydrate by dehydrating sodium perborate tetrahydrate in a fluid bed with heated air. Contact surfaces are arranged inside the fluid bed whose total area is the same as up to 500 times the area of the approach-flow bottom of the fluid bed. The contact surfaces are advantageously designed as heat exchangers whose surface temperature is adjusted to maintain 90.degree. to 110.degree. C. at the contact surfaces. The method results in a sodium perborate monohydrate with especially high abrasion resistance. In addition, the energy requirement is lower than that provided in the previously known method commonly used in the industry.

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