US4261850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacture of powdered detergent compositions containing fatty acid soaps
Assignee: Lever Brothers Co
•
Filing: 1979-05-07
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Granted: 1981-04-14
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Expires: 1999-05-07
Abstract
Abstract A washing powder containing soap, normally in relatively large quantities, is made by combining a slurry containing washing powder components with a stream containing fatty acid or soap or a mixture of these. The fatty acid may be liquid or molten or in solution. The slurry is combined with the stream in such a way that the two are thoroughly admixed, for instance by feeding them to a pressurizing pump. When fatty acid is to be combined with the slurry, the latter will contain sufficient excess alkali to form soap in situ.
Inventors
- 👤 Johannes L. C. Manders
- 👤 Robert E. Niemansverdriet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:13
CPC Classifications
C; C11; C11D; C11D9/00; C11D9/04; C11D11/00; C11D11/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A process for the manufacture of a soap-containing washing powder comprising the steps of (a) forming a first stream comprising an aqueous slurry comprising an anionic surface active agent, a nonionic surface active agent or a detergency builder, either singly or in any combination; (b) forming a second stream comprising soap or a fatty acid precursor thereof; (c) admixing said first and second streams; and (d) spray-drying the mixture to a soap-containing washing powder.
Claim 2
Dependent Claim
74 words
A process for the manufacture of a soap-containing washing powder comprising the steps of (a) forming a first stream comprising an aqueous slurry comprising an anionic surface active agent, a nonionic surface active agent or a detergency builder, either singly or in any combination; (b) forming a second stream comprising soap or a fatty acid precursor thereof; (c) admixing said first and second streams; and (d) spray-drying the mixture to a soap-containing washing powder.
Claim 3
Dependent Claim
25 words
A process in accordance with claim 1, wherein said second stream comprises fatty acid and said first stream sufficient alkali to neutralise that fatty acid.
Claim 4
Dependent Claim
20 words
A process in accordance with claim 1, wherein said second stream is admixed with pressurised slurry in said first stream.
Claim 5
Dependent Claim
18 words
A process in accordance with claim 1, wherein said first and second streams are admixed and pressurised simultaneously.
Claim 6
Dependent Claim
18 words
A process in accordance with claim 1, wherein said fatty acid has a melting point below 70° C.
Claim 7
Dependent Claim
33 words
A process in accordance with claim 1, wherein said fatty acid and/or soap content of said first and second streams is such that the washing powder produced contains 8-25% by weight of soap.
Claim 8
Dependent Claim
33 words
A process in accordance with claim 1, wherein said first stream comprises a nonionic surfactant in an amount such that the washing powder produced contains 2 to 20% by weight of nonionic surfactant.
References Cited (Backward Citations)
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GB943405A
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JPS5231202A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-13 | 1984-10-13 | 1985-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-13 | 1988-10-13 | 1989-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-13 | 1992-10-13 | 1993-04-14 | $7700.00 | Window Closed / Lapsed |