US4022702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of detergent compositions containing calcium carbonate
Assignee: Lever Brothers Co
•
Filing: 1975-05-28
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Granted: 1977-05-10
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Expires: 1995-05-28
Abstract
Abstract Particulate detergent compositions which comprise a detergent compound, an alkali metal carbonate detergency builder and finely divided calcium carbonate having a surface area of at least about 5 m 2 /g, are made with improved properties, by using a process in which the calcium carbonate is dispersed in water to which at least some of the detergent compound is added, after which the alkali metal carbonate is added to form a detergent slurry which is then spray-dried to form the detergent composition.
Inventors
- 👤 Michael Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:02
CPC Classifications
C; C11; C11D; C11D11/00; C11D11/02; C11D3/00; C11D3/02; C11D3/04; C11D3/10; C11D3/12; C11D3/1233
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
158 words
In a process for making a particulate detergent composition comprising from about 5 to about 40% of a detergent surface active compound selected from the group consisting of an anionic active which does not form an insoluble calcium salt during use, an amphoteric active, a zwitterionic active and mixtures thereof; from about 10 to about 75% of an alkali metal carbonate detergency builder; and from about 5 to about 60% of finely divided calcium carbonate having a surface area of at least about 5m 2 /g, the percentages being by weight of the total composition, the improvement whereby the calcium carbonate is dispersed in water to which from 5 to 100% of the detergent surface active compound is added, this percentage being by weight of the total detergent active compound in on the resultant composition, after which the alkali metal carbonate is added to form a detergent slurry which is then spray dried to form the detergent composition.
Claim 2
Dependent Claim
158 words
In a process for making a particulate detergent composition comprising from about 5 to about 40% of a detergent surface active compound selected from the group consisting of an anionic active which does not form an insoluble calcium salt during use, an amphoteric active, a zwitterionic active and mixtures thereof; from about 10 to about 75% of an alkali metal carbonate detergency builder; and from about 5 to about 60% of finely divided calcium carbonate having a surface area of at least about 5m 2 /g, the percentages being by weight of the total composition, the improvement whereby the calcium carbonate is dispersed in water to which from 5 to 100% of the detergent surface active compound is added, this percentage being by weight of the total detergent active compound in on the resultant composition, after which the alkali metal carbonate is added to form a detergent slurry which is then spray dried to form the detergent composition.
Claim 3
Dependent Claim
24 words
A process according to claim 1, whrein the calcium carbonate has a surface are of from about 30 to about 100 m 2 /g.
Claim 4
Dependent Claim
22 words
A process according to claim 1, wherein the calcium carbonate has not been dried before it is incorporated into the detergent slurry.
Claim 5
Dependent Claim
62 words
A process according to claim 1, comprising the step of adding to the detergent slurry sodium toluene sulphonate, coconut monoethanolamide or a condensation product of nine moles of ethylene oxide with a linear secondary alkanol containing 11 to 15 carbon atoms as a slurry viscosity decreasing additive, in an amount of from about 0.5% to about 5.0% by weight of the composition.
Claim 6
Dependent Claim
38 words
A process according to claim 1, comprising the step of adding to the detergent slurry after the calcium carbonate from about 5 to about 15% by weight of sodium alkaline or neutral silicate, based on the final composition.
References Cited (Backward Citations)
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US3979314A
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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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |