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EP0101099A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process for making a surface-modified, granulated alkali metal metasilicate pentahydrate, and use thereof

Assignee: Nouryon Pulp and Performance Chemicals AB
•
Filing: 1983-06-06
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Granted: —
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Expires: 2003-06-06
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Abstract

Abstract A process for making granules of a surface-modified alkali metal metasilicate pentahydrate either by heating alkali metal metasilicate pentahydrate granules at a temperature of 60-80°C for 1-20 seconds, or by spraying alkali metal metasilicate pentahydrate granules with an alkali metal silicate solution having a temperature of 60-100°C and the composition Si0 2 .XNa 2 O.YH 2 0 wherein X = 0.5-1.1 and Y = 3-5. The surface-modified granules have a low tendency to giving off water, thereby reducing the risk of decomposition of the chlorine compound which, together with the metasilicate granules and other conventional components, is included in the dishwashing or other detergent composition.

Inventors

  • 👤 Krister Holmberg

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-23 23:53
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/08; C01; C01B; C01B33/00; C01B33/20; C01B33/32; C01B33/325

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 84 words
Process for making a surface-modified, granulated alkali metal metasilicate pentahydrate, characteriserd by a) heating alkali metal metasilicate pentahydrate granules at a temperature of 60-80°C for 1-20 seconds; or b) applying to the surface of alkali metal metasilicate pentahydrate granules an alkali metal silicate solution having the composition SiO2·XNa 2 O·YH 2 O wherein X = 0.5-1.1 and Y = 3-5, and having a temperature of 60-100°C, to form a surface layer having a water content below 5 moles per mole of SiO 2 ,
Claim 2
Dependent Claim 84 words
Process for making a surface-modified, granulated alkali metal metasilicate pentahydrate, characteriserd by a) heating alkali metal metasilicate pentahydrate granules at a temperature of 60-80°C for 1-20 seconds; or b) applying to the surface of alkali metal metasilicate pentahydrate granules an alkali metal silicate solution having the composition SiO2·XNa 2 O·YH 2 O wherein X = 0.5-1.1 and Y = 3-5, and having a temperature of 60-100°C, to form a surface layer having a water content below 5 moles per mole of SiO 2 ,
Claim 3
Dependent Claim 14 words
Process as claimed in claim 1, characterised in that the alkali metal is sodium.
Claim 4
Dependent Claim 36 words
Process as claimed in claim 1 or 2, characterisied in that the alkali metal silicate solution is applied to the granules in an amount of 1 part by weight per 10-100 parts by weight of granules.
Claim 5
Dependent Claim 21 words
Use of a surface-modified, granulated alkali metal metasilicate pentahydrate prepared in accordance with claim 1, in dishwashing and other detergent compositions.

References Cited (Backward Citations)

US3208822A Cited
DE1567573B2 Cited
US3884645A Cited
US3748103A Cited
DE2806161B2 Cited
DE2744753A1 Cited

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