US4196093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of detergent compositions
Assignee: Lever Brothers Co
•
Filing: 1978-05-15
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Granted: 1980-04-01
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Expires: 1998-05-15
Abstract
Abstract Particulate detergent compositions comprising a detergent active compound, an alkali metal carbonate and finely divided calcium carbonate, are made by contacting the alkali metal carbonate in particulate form with a liquid or pasty detergent active compound or mixture thereof and admixing the calcium carbonate in powder form with the alkali metal carbonate particles so that the calcium carbonate adheres thereto.
Inventors
- 👤 David E. Clarke
- 👤 James F. Davies
- 👤 John B. Tune
- 👤 Raymond J. Wilde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:18
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/12; C11D3/1233; C11D3/04; C11D3/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
115 words
In a process for making a particulate detergent composition comprising from about 10% to about 75% of an alkali metal carbonate, from about 1% to about 40% of a detergent active compound and from about 5% to about 50% of finely divided calcium carbonate having a surface area of at least about 10 m 2 /g, the improvement consisting essentially of contacting sodium or potassium carbonate or a mixture thereof in particulate form with a liquid or pasty detergent active compound or mixture thereof which contains a major proportion of a nonionic detergent compound and admixing the calcium carbonate in powder form with the alkali metal carbonate particles so that the calcium carbonate adheres thereto.
Claim 2
Dependent Claim
115 words
In a process for making a particulate detergent composition comprising from about 10% to about 75% of an alkali metal carbonate, from about 1% to about 40% of a detergent active compound and from about 5% to about 50% of finely divided calcium carbonate having a surface area of at least about 10 m 2 /g, the improvement consisting essentially of contacting sodium or potassium carbonate or a mixture thereof in particulate form with a liquid or pasty detergent active compound or mixture thereof which contains a major proportion of a nonionic detergent compound and admixing the calcium carbonate in powder form with the alkali metal carbonate particles so that the calcium carbonate adheres thereto.
Claim 3
Dependent Claim
25 words
A process according to claim 1, wherein the calcium carbonate is added after the alkali metal carbonate has been treated with the detergent active compound.
Claim 4
Dependent Claim
21 words
A process according to claim 1, wherein the detergent active compound is added to mixed alkali metal carbonate and calcium carbonate.
Claim 5
Dependent Claim
14 words
A process according to claim 1, wherein the alkali metal carbonate is sodium carbonate.
Claim 6
Dependent Claim
23 words
A process according to claim 1, wherein the alkali metal carbonate is at least partially hydrated prior to addition of the calcium carbonate.
Claim 7
Dependent Claim
14 words
A process according to claim 1, wherein the alkali metal carbonate is spray dried.
Claim 8
Dependent Claim
36 words
A process according to claim 1, wherein the alkali metal carbonate has a mean particle size of 0.1 mm to 0.5 mm and with at least 80% by weight of the particles being within this range.
Claim 9
Dependent Claim
12 words
A process according to claim 1, wherein the calcium carbonate is calcite.
Claim 10
Dependent Claim
27 words
A process according to claim 1, wherein the calcium carbonate has a surface area of from about 10 m 2 /g to about 100 m 2 /g.
Claim 11
Dependent Claim
26 words
A process according to claim 1, wherein the amount of the detergent active compound is from about 5% to about 20% by weight of the composition.
Claim 12
Dependent Claim
27 words
A process according to claim 1, wherein the detergent compound is heated to a temperature of from about 50°-100° C. and sprayed onto the alkali metal carbonate.
Claim 13
Dependent Claim
31 words
A process according to claim 1, wherein sodium perboate mono- or tetra-hydrate or sodium percarbonate is admixed with the alkali metal carbonate before or after contact with the detergent active compound.
Claim 14
Dependent Claim
17 words
A process according to claim 1, wherein the resultant composition comprises not more than about 0.05% phosphorus.
Claim 15
Dependent Claim
30 words
A process according to claim 1, wherein sodium silicate is added to the alkali metal carbonate in an amount of not more than about 5% by weight of the composition.
Claim 16
Dependent Claim
12 words
A particulate detergent composition made by a process according to claim 1.
References Cited (Backward Citations)
US4013578A
Cited
US4051054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |