Patent US3728093A successfully refreshed from Google Patents.
US3676352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of enzyme and perborate-containing detergent compositions
Assignee: Knapsack AG
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Filing: 1970-01-26
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Granted: 1972-07-11
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Expires: 1990-01-26
Abstract
Abstract Production of enzyme and perborate-containing detergent compositions by spraying liquid or pasty detergent components onto solid, powdery detergent components with the resultant formation of a readily flowable granulate. Solid detergent components comprising a powder mixture consisting substantially of one or more alkali metal salts as a builder substance and sodium perborate are fluidized by means of air and the fluidized powder mixture is granulated by spraying liquid detergent components comprising water or an aqueous solution or suspension of one or more binders and optionally a surface-active substance, onto it. The enzyme may be present in the powder mixture or in the water or aqueous solution or suspension to be sprayed thereonto.
Inventors
- 👤 Dieter Grimm
- 👤 Joachim Kandler
- 👤 Karl Merkenich
- 👤 Wolf-Dieter Pirig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:41
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/38; C11D3/386; C11D3/38672; C11D3/38609
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
43 words
The process as claimed in claim 1, wherein the builder substance is at least one member selected from the group consisting of sodium tripolyphosphate with a phase-I-content of between 20 and 100 weight percent, sodium pyrophosphate, sodium hexametaphosphate, trisodium nitrilotriacetate and tetrasodium ethylenediaminetetracetate.
Claim 2
Dependent Claim
30 words
The process as claimed in claim 1, wherein the builder substances are hydrated using a quantity of water, between about 2 and 50 weight percent, based on the builder substance.
Claim 3
Dependent Claim
38 words
The process as claimed in claim 1, wherein the detergent composition contains between about 20 and 50 weight percent builder, between about 50 and 10 weight percent sodium perborate and between about 0.2 and 2 weight percent enzyme.
Claim 4
Dependent Claim
23 words
The process as claimed in claim 1, wherein the granulated detergent composition is prepared in a turbulent air mixer provided with spray systems.
Claim 5
Dependent Claim
24 words
The process as claimed in claim 2, wherein the builder substance is sodium tripolyphosphate with a phase-I-content of between 40 and 80 weight percent.
Claim 6
Dependent Claim
22 words
The process as claimed in claim 2, wherein the sodium tripolyphosphate has an apparent density of preferably between 600 and 700 grams/liter.
Claim 7
Dependent Claim
144 words
In the process for the manufacture of granular detergent compositions essentially containing an enzyme selected from the group consisting of hydrolases, oxidoreductases, transferases, desmolases and isomerases, an alkali perborate and a builder salt, the cation of the builder salt being a lithium, sodium, potassium or ammonium ion, and the acid salt component having at least one member selected from the group consisting of sulfuric acid, silicic acid, carbonic acid, pyrophosphoric acid, metaphosphoric acid, tripolyphosphoric acid, nitrilotriacetic acid, and ethylenediaminetetracetic acid, by granulating the components of the detergent composition, the improvement which comprises air-fluidizing a powder mixture of the alkali perborate and the builder salt and effecting granulation by spraying an aqueous solution or suspension of the enzyme and of at least one binder selected from the group consisting of carboxymethylcellulose, dextrin, agar-agar, gum arabic, tragacanth, bassorin and a guar gum onto the powder mixture.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |