EP0267042A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Detergent granules and a process for their preparation
Assignee: Unilever PLC
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Filing: 1987-11-06
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Granted: —
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Expires: 2007-11-06
Abstract
Abstract Detergent powders built with alkali metal carbonate and containing both sodium silicate and a calcium carbonate seed crystal material such as calcite are prepared by granulating a carbonate/silicate base powder with the seed crystal material, ideally in the presence of a liquid binder such as sucrose solution.
Inventors
- 👤 Robert William Anderson
- 👤 Peter Mccowan Duggleby
- 👤 Peter Frederick Garner-Gray
- 👤 Ian Eric Niven
- 👤 Timothy John Price
- 👤 Chandulal Kantilal Ranpuria
- 👤 Thomas Taylor
- 👤 Raymond John Wilde
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 12:43
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/10; C11D3/08; C11D3/12; C11D3/1233; C11D3/16; C11D3/20; C11D3/22; C11D3/221; C11D3/222; C11D3/225
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
64 words
A granular detergent product comprising: (i) from 3% to 42% of a detergent active material selected from anionic detergent active materials, nonionic detergent active materials, nonionic detergent active materials and mixtures thereof; (ii) from 5% to 56% of sodium carbonate: (iii)from 5% to 30% of sodium silicate; and (iv) from 5% to 40% particulate calcite having a surface area of at least 10 m²/g;
Claim 2
Dependent Claim
64 words
A granular detergent product comprising: (i) from 3% to 42% of a detergent active material selected from anionic detergent active materials, nonionic detergent active materials, nonionic detergent active materials and mixtures thereof; (ii) from 5% to 56% of sodium carbonate: (iii)from 5% to 30% of sodium silicate; and (iv) from 5% to 40% particulate calcite having a surface area of at least 10 m²/g;
Claim 3
Dependent Claim
29 words
wherein said detergent active material, sodium carbonate and sodium silicate are in the form of granulated base powder, said calcite being adhered to the surface of said base powder.
Claim 4
Dependent Claim
29 words
wherein said detergent active material, sodium carbonate and sodium silicate are in the form of granulated base powder, said calcite being adhered to the surface of said base powder.
Claim 5
Dependent Claim
36 words
A granular detergent product according to claim 1 further comprising a binder material which serves to adhere said calcite to said base powder, said binder material being selected from sucrose, sodium carboxymethyl cellulose and nonionic surfactants.
Claim 6
Dependent Claim
35 words
A granular detergent product according to claim 1 further comprising a peracid generating bleach system selected from peracids and mixtures of a peroxybleach with a peracid bleach activator, the product being essentially free of phosphorus.
Claim 7
Dependent Claim
66 words
A process for the preparation of a granular detergent product comprising (i) from 3% to 42% of a detergent active material selected from anionic detergent active materials, nonionic detergent active materials and mixtures thereof; (ii) from 5% to 56% of sodium carbonate; (iii)from 5% to 30% of sodium silicate; and (iv) from 5% to 40% particulate calcite having a surface area of at least 10 m²/g;
Claim 8
Dependent Claim
66 words
A process for the preparation of a granular detergent product comprising (i) from 3% to 42% of a detergent active material selected from anionic detergent active materials, nonionic detergent active materials and mixtures thereof; (ii) from 5% to 56% of sodium carbonate; (iii)from 5% to 30% of sodium silicate; and (iv) from 5% to 40% particulate calcite having a surface area of at least 10 m²/g;
Claim 9
Dependent Claim
44 words
comprising the steps of a) granulating said detergent active material, sodium carbonate and sodium silicate to form a granulated base powder; and b) granulating said granulated base powder with said calcite, to cause said calcite to adhere to the surface of said base powder.
Claim 10
Dependent Claim
44 words
comprising the steps of a) granulating said detergent active material, sodium carbonate and sodium silicate to form a granulated base powder; and b) granulating said granulated base powder with said calcite, to cause said calcite to adhere to the surface of said base powder.
Claim 11
Dependent Claim
32 words
A process according to Claim 4, wherein said granulated base powder is formed by spray-drying an aqueous slurry comprising said detergent active material, sodium carbonate and sodium silicate in a spray-drying tower.
Claim 12
Dependent Claim
27 words
A process according to claim 5, wherein said calcite is simultaneously injected into said spray-drying tower, whereby calcite particules encounter said granulated base powder within said tower.
References Cited (Backward Citations)
No citation records indexed.
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