US4008065A
Expired / Lapsed
US
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Granulated fertilizer composition and method for its preparation
Assignee: Kali Chemie AG
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Filing: 1975-02-14
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Granted: 1977-02-15
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Expires: 1995-02-14
Abstract
Abstract Disclosed is a granulated fertilizer composition comprising mineral phosphates calcined with alkali and between about 0.5 and 15% by weight of tetrapotassium pyrophosphate as an adjuvant. Also disclosed is a process for preparing the subject compositions.
Inventors
- 👤 Ulrich Hauschild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:26
CPC Classifications
C; C05; C05B; C05B13/00; C05B13/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
28 words
A granulated fertilizer composition comprising mineral phosphates calcined with alkali and between about 0.5 and 15% by weight of tetrapotassium pyrophosphate K 4 P 2 O 7 .
Claim 2
Dependent Claim
28 words
A granulated fertilizer composition comprising mineral phosphates calcined with alkali and between about 0.5 and 15% by weight of tetrapotassium pyrophosphate K 4 P 2 O 7 .
Claim 3
Dependent Claim
27 words
The granulated fertilizer composition as defined by claim 1, wherein said amount of K 4 P 2 O 7 is between about 1 and 10% by weight.
Claim 4
Dependent Claim
35 words
The granulated fertilizer composition as defined by claim 1, further comprising at least one additional plant nutritive agent selected from the group consisting of potassium salts, magnesium salts, nitrogen compounds, boron compounds and mixtures thereof.
Claim 5
Dependent Claim
41 words
The granulated fertilizer composition as defined by claim 1, further comprising an amount of a fertilizer adjuvant selected from the group consisting of sulfite waste liquor, starch, molasses, sugar, water glass, gypsum, clay, natural or synthetic water-soluble polymers and mixtures thereof.
Claim 6
Dependent Claim
19 words
The granulated fertilizer composition as defined by claim 1, having a particle size between about 0.5 and 3.0 mm.
Claim 7
Dependent Claim
53 words
A process for the preparation of the granulated fertilizer composition defined by claim 1 comprising the steps of mixing together ground alkali-containing calcined phosphate and between about 0.5 and 15% by weight of tetrapotassium pyrophosphate K 4 P 2 O 7 , granulating the resulting mixture with water and drying the resulting granules.
Claim 8
Dependent Claim
25 words
The process as defined by claim 6, wherein at least about 85% of said ground calcined phosphate has a particle size smaller than 0.15 mm.
Claim 9
Dependent Claim
29 words
The process as defined by claim 6, wherein between about 1 and 10% by weight of said K 4 P 2 O 7 is mixed with said calcined phosphate.
Claim 10
Dependent Claim
19 words
The process as defined by claim 6, wherein said mixture is granulated with between about 7 and 15% water.
Claim 11
Dependent Claim
34 words
The process as defined by claim 6, wherein said calcined phosphate contains an additional plant nutritive agent selected from the group consisting of potassium salts, magnesium salts, nitrogen compounds, boron compounds and mixtures thereof.
Claim 12
Dependent Claim
45 words
The process as defined by claim 6, further comprising adding to said mixture a minor amount of a fertilizer granulating adjuvant selected from the group consisting of sulfite waste liquor, sugar, starch, molasses, water glass, gypsum, clay, natural or synthetic water-soluble polymers and mixtures thereof.
Claim 13
Dependent Claim
23 words
The process as defined by claim 6, wherein said K 4 P 2 O 7 is added in the form of a powder.
Claim 14
Dependent Claim
24 words
The process as defined by claim 6, wherein said K 4 P 2 O 7 is added in the form of an aqueous solution.
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) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |