Patent US3971726A successfully refreshed from Google Patents.
US3971726A
Expired / Lapsed
US
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Process for lowering the bulk density of alkali making built synthetic detergent compositions
Assignee: Colgate Palmolive Co
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Filing: 1974-04-22
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Granted: 1976-07-27
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Expires: 1994-04-22
Abstract
Abstract Spray dried beads, having a low bulk density and high in alkali metal carbonate content and useful for post-treatment with additional amounts of nonionic detergent to produce a heavy duty detergent compositon of a bulk density in the range of 0.2 to 0.35 gram per milliliter, are made by admixing a small percentage of alkali metal soap of higher fatty acid with a 40-75% solids content aqueous crutcher mix comprising the alkali metal carbonate and up to about 2% by weight nonionic detergent heating the crutcher mix to 170°-190° F. and spray drying the mixture.
Inventors
- 👤 Frank R. Smith, Jr.
- 👤 Edward J. Kenney
- 👤 Walter A. DiSalvo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:26
CPC Classifications
C; C11; C11D; C11D11/00; C11D11/02; C11D3/00; C11D3/02; C11D3/04; C11D3/10; C11D3/16; C11D3/20; C11D3/2075; C11D3/2079; C11D9/00; C11D9/04; C11D9/06; C11D9/08; C11D9/10; C11D9/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
121 words
A method of spray drying alkali metal carbonate beads useful to be post-treated with a polyethoxylated nonionic organic detergent to produce a heavy duty detergent composition, the bulk density of said bead being in the range of about 0.2 to 0.35 gram per milliliter comprising admixing with a 40-75% solids content aqueous crutcher mix containing said alkali metal carbonate from about 0.75 to 4% of an alkali metal soap of a higher fatty acid and up to about 2% by weight nonionic detergent, heating and spray drying the resulting mixture, the carbonate content being approximately 20-75% by weight, and thereafter post-treating said mix with additional amounts of said nonionic detergent such that the final bead contains about 5-15% of said nonionic.
Claim 2
Independent Claim
121 words
A method of spray drying alkali metal carbonate beads useful to be post-treated with a polyethoxylated nonionic organic detergent to produce a heavy duty detergent composition, the bulk density of said bead being in the range of about 0.2 to 0.35 gram per milliliter comprising admixing with a 40-75% solids content aqueous crutcher mix containing said alkali metal carbonate from about 0.75 to 4% of an alkali metal soap of a higher fatty acid and up to about 2% by weight nonionic detergent, heating and spray drying the resulting mixture, the carbonate content being approximately 20-75% by weight, and thereafter post-treating said mix with additional amounts of said nonionic detergent such that the final bead contains about 5-15% of said nonionic.
Claim 3
Dependent Claim
69 words
A method according to claim 1 wherein the alkali metal carbonate is sodium carbonate, the bulk density of the spray dried beads made is from 0.25 to 0.35 g./ml., the alkali metal soap is sodium soap of a mixture of higher fatty acids of carbon contents in the range of 12 to 18 carbon atoms per molecule and the crutcher mix is at a temperature of 170°-190°F before spraying.
Claim 4
Dependent Claim
86 words
A method according to claim 2 wherein the sodium carbonate content of the crutcher mix is such as to produce beads containing from 40 to 90% of sodium carbonate, the crutcher mix solids content is from 50 to 75% and the sodium soap is a mixture of higher fatty acids in the 12 to 18 carbon atoms range, in which those of 16 to 18 carbon atoms are from 60 to 100% and the crutcher mix is dried to a moisture content of 1 to 12%.
Claim 5
Dependent Claim
86 words
A method according to claim 3 wherein the sodium carbonate content of the crutcher mix is such as to produce beads containing from 50 to 90% of sodium carbonate, the sodium soap is a mixture of higher fatty acids of 12 to 18 carbon atoms in which those of 16 to 18 carbon atoms constitute from 75 to 100%, the sodium soap content of the crutcher mix is 2 to 4% and the temperature to which the crutcher mix is heated is from 175° to 185°F.
Claim 6
Dependent Claim
22 words
A method according to claim 4 wherein the crutcher mix also contains from 0.5 to 2% of a polyethoxylated nonionic organic detergent.
Claim 7
Dependent Claim
24 words
A method according to claim 4 wherein the crutcher mix also contains from 2 to 20% of water soluble anionic synthetic organic detergent salt.
Claim 8
Dependent Claim
43 words
A method according to claim 5 wherein the crutcher mix also contains water soluble anionic synthetic organic detergent salt and sodium silicate in such proportions as to result in 2 to 20%, respectively and 5 to 20% thereof in the spray dried beads.
Claim 9
Dependent Claim
56 words
A method according to claim 5 wherein the spray dried higher alkali metal carbonate content beads are post sprayed with a polyethoxylated nonionic organic detergent so that the content thereof in the post sprayed detergent beads is from 5 to 15% thereof and the bulk density of the product resulting is from 0.25 to 0.4 g./ml.
Claim 10
Dependent Claim
61 words
A method according to claim 7 wherein the spray dried beads are post-sprayed with a polyethoxylated nonionic organic detergent so that the total content thereof in the product is from 5 to 15%, the particle sizes of the product are in the 8 to 100 mesh range and the bulk density of the product resulting is from 0.25 to 0.4 g./ml.
Claim 11
Dependent Claim
14 words
An alkali metal carbonate bead produced by the process as defined in claim 1.
Claim 12
Dependent Claim
23 words
A detergent composition containing a minor amount of nonionic detergent derived from the beads produced in accordance with the method of claim 2.
References Cited (Backward Citations)
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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) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |