Process for the production of crystalline zeolite powder of type A

US4339419A · kind A · utility

Assignees

• Degussa AG · DE
• Henkel Kommanditgesellschaft auf Aktien (Henkel KGAA) · DE

Inventor

• Hans Strack · Alzenau, DE

Key dates

• Filing date: Feb 24, 1981
• Grant date: Jul 13, 1982
• Expiry date: Feb 24, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S423/24
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

There is produced a crystalline zeolite powder of Type A which can be employed as a phosphate substitute in washing agents by a precipitation reaction by a specific sequence in which there are simultaneously added to water in a container a waterglass solution and a sodium aluminate liquor and subsequently in succession a waterglass solution and then sodium aluminate liquor. The crystalline product has an average particle size of 6.7 to 8.mu. as well as a narrow particle size distribution curve.