US4228025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agglomeration process for making granular detergents
Assignee: Procter and Gamble Co
•
Filing: 1979-06-29
•
Granted: 1980-10-14
•
Expires: 1999-06-29
Abstract
Abstract Granular detergent compositions comprising at least 15% sodium tripolyphosphate are prepared by agglomeration with an agglomerating agent comprising an alkali metal silicate solution such process comprising addition of such agglomerating agent to a first portion of sodium tripolyphosphate and the addition of a second portion of sodium tripolyphosphate to the mixture of said first portion and the agglomerating agent after at least about 30% of the agglomerating agent has been added.
Inventors
- 👤 Ronald L. Jacobsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:56
CPC Classifications
C; C11; C11D; C11D11/00; C11D11/0082; C11D3/00; C11D3/02; C11D3/04; C11D3/06; C11D3/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
102 words
A process for preparing an agglomerated granular detergent composition comprising at least about 15% sodium tripolyphosphate by weight, from about 50% to about 99.5% by weight of inorganic materials selected from the group consisting of alkali metal polyphosphates, orthophosphates, chlorinated orthophosphates, silicates, carbonates, sulfates and mixtures thereof and from 0% to about 20% of a surfactant, in which the agglomerating agent comprises an alkali metal silicate solution having a water content of from about 50% to about 75%, an average SiO 2 :M 2 O weight ratio of from about 1.6 to about 3.3, M being an alkali metal, said process comprising:
Claim 2
Dependent Claim
102 words
A process for preparing an agglomerated granular detergent composition comprising at least about 15% sodium tripolyphosphate by weight, from about 50% to about 99.5% by weight of inorganic materials selected from the group consisting of alkali metal polyphosphates, orthophosphates, chlorinated orthophosphates, silicates, carbonates, sulfates and mixtures thereof and from 0% to about 20% of a surfactant, in which the agglomerating agent comprises an alkali metal silicate solution having a water content of from about 50% to about 75%, an average SiO 2 :M 2 O weight ratio of from about 1.6 to about 3.3, M being an alkali metal, said process comprising:
Claim 3
Dependent Claim
56 words
(a) the addition of the agglomerating agent to a first portion of the sodium tripolyphosphate consisting of from about 50% to about 95% of the total sodium tripolyphosphate in the detergent composition, said first portion having a particle size distribution such that at least 30% by weight is retained on a 100 Tyler mesh screen, and
Claim 4
Dependent Claim
56 words
(a) the addition of the agglomerating agent to a first portion of the sodium tripolyphosphate consisting of from about 50% to about 95% of the total sodium tripolyphosphate in the detergent composition, said first portion having a particle size distribution such that at least 30% by weight is retained on a 100 Tyler mesh screen, and
Claim 5
Dependent Claim
43 words
(b) the addition of a second portion of sodium tripolyphosphate to a mixture of the first portion of sodium tripolyphosphate and the agglomerating agent after at least about 30% of the agglomerating agent has been added to the first portion of sodium tripolyphosphate.
Claim 6
Dependent Claim
43 words
(b) the addition of a second portion of sodium tripolyphosphate to a mixture of the first portion of sodium tripolyphosphate and the agglomerating agent after at least about 30% of the agglomerating agent has been added to the first portion of sodium tripolyphosphate.
Claim 7
Dependent Claim
31 words
The process of claim 1 wherein the second portion of sodium tripolyphosphate has a particle size distribution such that at least 70% by weight passes through a 100 Tyler mesh screen.
Claim 8
Dependent Claim
41 words
The process of claims 1 or 2 wherein the second portion of sodium tripolyphosphate is added after at least about 50% but not more than about 95% of the agglomerating agent has been added to the first portion of sodium tripolyphosphate.
Claim 9
Dependent Claim
20 words
The process of claim 1 wherein the agglomerated granular detergent composition comprises a material providing hypochlorite ions in aqueous solution.
Claim 10
Dependent Claim
23 words
The process of claim 1 wherein the agglomerated granular detergent composition comprises from about 0.5% to about 20% of an alkoxylated nonionic surfactant.
Claim 11
Dependent Claim
25 words
The process of claim 5 wherein the alkoxylated nonionic surfactant comprises from about 2% to about 10% by weight of the agglomerated granular detergent composition.
Claim 12
Dependent Claim
17 words
The process of claims 1 or 4 wherein the material providing hypochlorite ions is chlorinated sodium orthophosphate.
References Cited (Backward Citations)
US2689225A
Cited
US2895916A
Cited
US3247118A
Cited
US3248330A
Cited
US3630928A
Cited
US3620979A
Cited
US3598743A
Cited
US3625902A
Cited
US3812045A
Cited
US3520815A
Cited
US3600317A
Cited
US3741904A
Cited
US3888781A
Cited
US4169806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |