US4478735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing granular detergent composition
Assignee: Lion Corp
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Filing: 1982-05-11
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Granted: 1984-10-23
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Expires: 2002-05-11
Abstract
Abstract A process for producing a granular detergent composition containing a surface active agent, a zeolite, an alkali metal silicate, and other detergent builder is described. This granular detergent composition is produced by either (1) (a) preparing an aqueous slurry containing, as a dispersing medium, the surface active agent; (b) bubbling a gas into the aqueous slurry to form a slurry containing bubbles having an average bubble diameter of 40 through 100 microns and having a specific gravity of 0.7 through 0.9; (c) mixing the resultant aqueous slurry with the zeolite, the alkali metal silicate, and the other builders to form a detergent slurry; and (d) spray drying the detergent slurry to form the granular detergent composition or (2) (a) preparing a detergent slurry containing the surface active agent, the zeolite, the alkali metal silicate, and/or other detergent builders; (b) passing the detergent slurry through a centrifugal pump, while a gas is bubbled into the detergent slurry, whereby the detergent slurry containing bubbles having an average diameter of 40 through 100 microns and having a specific gravity of 0.7 through 0.9 is formed; and (c) spray drying the detergent slurry to form the granular detergent composition.
Inventors
- 👤 Mitsuyoshi Yazaki
- 👤 Hideo Tanaka
- 👤 Masayoshi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:46
CPC Classifications
C; C11; C11D; C11D11/00; C11D11/02; C11D3/00; C11D3/02; C11D3/12; C11D3/124; C11D3/1246; C11D3/128; Y; Y10; Y10S; Y10S159/00; Y10S159/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A process for producing a granular detergent composition containing a surface active agent, a zeolite, an alkali metal silicate, and other detergent builders, the content of the zeolite being 10% through 25% by weight on a dry weight basis, comprising the steps of: (a) preparing an aqueous slurry having a water content of 45% through 80% by weight and containing, as a dispersing medium, the surface active agent; (b) bubbling a gas into the aqueous slurry to form a slurry containing bubbles having an average bubble diameter of 40 through 100 microns and having a specific gravity of 0.7 through 0.9; (c) mixing the resultant aqueous slurry with the zeolite, the alkali metal silicate, and the other builders to form a detergent slurry; and (d) spray drying the detergent slurry to form a granular detergent composition having a bulk density of 0.305 g/cc or less; said process providing a drying capacity of at least about 3800 kg/hr.
Claim 2
Dependent Claim
157 words
A process for producing a granular detergent composition containing a surface active agent, a zeolite, an alkali metal silicate, and other detergent builders, the content of the zeolite being 10% through 25% by weight on a dry weight basis, comprising the steps of: (a) preparing an aqueous slurry having a water content of 45% through 80% by weight and containing, as a dispersing medium, the surface active agent; (b) bubbling a gas into the aqueous slurry to form a slurry containing bubbles having an average bubble diameter of 40 through 100 microns and having a specific gravity of 0.7 through 0.9; (c) mixing the resultant aqueous slurry with the zeolite, the alkali metal silicate, and the other builders to form a detergent slurry; and (d) spray drying the detergent slurry to form a granular detergent composition having a bulk density of 0.305 g/cc or less; said process providing a drying capacity of at least about 3800 kg/hr.
Claim 3
Dependent Claim
22 words
A process as claimed in claim 1 wherein the aqueous slurry into which a gas is bubbled contains the alkali metal silicate.
Claim 4
Dependent Claim
32 words
A process as claimed in claim 1 or 2 wherein the aqueous slurry is passed through a centrifugal pump prior to the mixing thereof with the zeolite and the other detergent builders.
Claim 5
Dependent Claim
141 words
A process for producing a granular detergent composition containing a surface active agent, a zeolite, an alkali metal silicate, and other detergent builders, the content of the zeolite being 10% through 25% by weight on a dry weight basis, comprising the steps of: (a) preparing a detergent slurry containing the surface active agent, the zeolite, the alkali metal silicate, and/or other detergent builders; (b) passing the detergent slurry through a centrifugal pump, while a gas is bubbled into the detergent slurry, whereby the detergent slurry containing bubbles having an average diameter of 40 through 100 microns and having a specific gravity of 0.7 through 0.9 is formed; and (c) spray drying the detergent slurry to form a granular detergent composition having a bulk density of 0.305 g/cc or less; said process providing a drying capacity of at least about 3800 kg/hr.
Claim 6
Dependent Claim
141 words
A process for producing a granular detergent composition containing a surface active agent, a zeolite, an alkali metal silicate, and other detergent builders, the content of the zeolite being 10% through 25% by weight on a dry weight basis, comprising the steps of: (a) preparing a detergent slurry containing the surface active agent, the zeolite, the alkali metal silicate, and/or other detergent builders; (b) passing the detergent slurry through a centrifugal pump, while a gas is bubbled into the detergent slurry, whereby the detergent slurry containing bubbles having an average diameter of 40 through 100 microns and having a specific gravity of 0.7 through 0.9 is formed; and (c) spray drying the detergent slurry to form a granular detergent composition having a bulk density of 0.305 g/cc or less; said process providing a drying capacity of at least about 3800 kg/hr.
References Cited (Backward Citations)
US3629951A
Cited
US4362640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |