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US3776713A
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US
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Kcl-phosphate granules
Assignee: Azote et Produits Chimiques SA
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Filing: 1969-06-09
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Granted: 1973-12-04
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Expires: 1989-06-09
Abstract
Abstract To produce hard, abrasion-resistant, substantially spherical granules consisting essentially of potassium chloride and phosphate, particulate potassium chloride is agglomerated with an aqueous solution containing as the essential binding agent, a complex mixture of ortho-phosphates and condensed phosphates produced by reacting potassium chloride in orthophosphoric acid at above 180* C. To improve the granulation yield having the desired particle sizes, ammonia is added to the mixture to be granulated either before or during granulation.
Inventors
- 👤 B Quanquin
- 👤 H Trimbach
- 👤 P Dumont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:40
CPC Classifications
C; C05; C05B; C05B7/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
15 words
A process as defined by claim 1 wherein said molar ratio is 1:1 to 2.25:1.
Claim 2
Dependent Claim
18 words
A process as defined by claim 1 wherein said reaction product is reacted at less than 300* C.
Claim 3
Dependent Claim
18 words
A process as defined by claim 2 wherein said reaction product is reacted at less than 300* C.
Claim 4
Dependent Claim
18 words
A process as defined by claim 1 wherein said reaction product is reacted at 200* - 250* C.
Claim 5
Dependent Claim
18 words
A process as defined by claim 2 wherein said reaction product is reacted at 200* - 250* C.
Claim 6
Dependent Claim
25 words
A process as defined by claim 1 comprising the further step of admixing ammonia to said mixture to be granulated to increase the granulation yield.
Claim 7
Dependent Claim
25 words
A process as defined by claim 2 comprising the further step of admixing ammonia to said mixture to be granulated to increase the granulation yield.
Claim 8
Dependent Claim
25 words
A process as defined by claim 3 comprising the further step of admixing ammonia to said mixture to be granulated to increase the granulation yield.
Claim 9
Dependent Claim
25 words
A process as defined by claim 6 comprising the further step of admixing ammonia to said mixture to be granulated to increase the granulation yield.
Claim 10
Dependent Claim
21 words
A process as defined by claim 1, wherein said aqueous solution of reaction product is formed prior to the granulation step.
Claim 11
Dependent Claim
21 words
A process as defined by claim 1, wherein said reaction product consists essentially of a mixture of orthophosphates and condensed phosphates.
Claim 12
Dependent Claim
16 words
A process as defined by claim 1, wherein said reaction product consists esSentially of potassium metaphosphate.
Claim 13
Dependent Claim
37 words
A process as defined by claim 11, wherein the reaction product and water is added thereto to obtain a solution having a temperature of about 90* to 100* C., said solution being introduced into the granulating step.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |