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Class Information
Number: 71/41
Name: Chemistry: fertilizers > Processes and products > Inorganic material > Phosphorus-containing > Phosphates > Acid treatment > Acids of phosphorus
Description: Processes wherein the acid used is an acid of phosphorus.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7452398 |
Phosphate and potash(PK)-containing compound fertilizer |
Nov. 18, 2008 |
| 7160350 |
Formulation of phosphorus fertilizer for plants |
Jan. 9, 2007 |
| 7160349 |
Formulation of phosphorus fertilizer for plants |
Jan. 9, 2007 |
| 6929673 |
Formulation of phosphorus fertilizer for plants |
Aug. 16, 2005 |
| 6896714 |
Formulation of phosphorus fertilizer for plants |
May. 24, 2005 |
| 6645268 |
Formulation of phosphorus fertilizer for plants |
Nov. 11, 2003 |
| 6406510 |
Methods for treating wastewater sludge |
Jun. 18, 2002 |
| 6391080 |
Phosphate, phosphatic fertilizers manufacturing process |
May. 21, 2002 |
| 6231767 |
Treatment of phosphatic wastes |
May. 15, 2001 |
| 6183532 |
Method for sterilizing soils |
Feb. 6, 2001 |
| 6113665 |
Formulation of phosphorus fertilizer for plants |
Sep. 5, 2000 |
| 5830255 |
Formulation of phosphorus fertilizer for plants |
Nov. 3, 1998 |
| 5514200 |
Formulation of phosphorus fertilizer for plants |
May. 7, 1996 |
| 5378258 |
Method and an installation for producing granulated triple superphosphate (TSP) |
Jan. 3, 1995 |
| 5374294 |
Controlled release potassium divalent metal phosphate fertilizer |
Dec. 20, 1994 |
| 5308372 |
Vegetable oil processing to obtain nutrient by-products |
May. 3, 1994 |
| 5300136 |
Potassium fertilizer from aluminum reclamation by-products |
Apr. 5, 1994 |
| 5211735 |
Process for preparing phosphated or nitrophosphated fertilizers through solubilization of phosphate rock |
May. 18, 1993 |
| 5035872 |
Method of preparing potassium magnesium phosphate |
Jul. 30, 1991 |
| 4932993 |
Batch production of suspension fertilizers using lignosulfonate |
Jun. 12, 1990 |
| 4883530 |
Use of ammonium syngenite as a slow-acting nitrogen fertilizer |
Nov. 28, 1989 |
| 4838922 |
Method for producing monocalcium phosphate and products produced therefrom |
Jun. 13, 1989 |
| 4836843 |
Fertilizer process |
Jun. 6, 1989 |
| 4832735 |
High nutrient value liquid fertilizer |
May. 23, 1989 |
| 4765822 |
Recovery of fluorine from waste gases |
Aug. 23, 1988 |
| H425 |
O--X--O and O--X--X suspension fertilizers from phosphoric acid, phosphate rock, and potash |
Feb. 2, 1988 |
| 4576627 |
Method of providing fertilizer from brines |
Mar. 18, 1986 |
| 4557748 |
Method of lowering the magnesium impurity level of wet-process phosphoric acid during production of liquid fertilizer |
Dec. 10, 1985 |
| 4536376 |
Method of producing potassium magnesium phosphate |
Aug. 20, 1985 |
| 4528021 |
Granulated fertilizer and slurry process therefor |
Jul. 9, 1985 |
| 4522638 |
Method and apparatus for regulating the NH.sub.3 content in scrubbing liquid used in a gas scrubbing process |
Jun. 11, 1985 |
| 4496526 |
Process for the production of potassium magnesium phosphate |
Jan. 29, 1985 |
| 4475940 |
Method of converting waste dross to fertilizer |
Oct. 9, 1984 |
| 4457773 |
Magnesium phosphate fluid fertilizer |
Jul. 3, 1984 |
| 4440560 |
Mixed phosphatic fertilizer and process for producing the same |
Apr. 3, 1984 |
| 4337079 |
Low polyphosphate suspension fertilizers from wet-process acid |
Jun. 29, 1982 |
| 4336053 |
Fertilizer solutions stabilized with inorganic acids |
Jun. 22, 1982 |
| T101802 |
Low polyphosphate suspension fertilizers from wet-process acid |
May. 4, 1982 |
| 4308049 |
Process for the absorption of ammonia in acid solutions or slurries |
Dec. 29, 1981 |
| 4286982 |
Process of manufacturing stable ammonium polyphosphate fertilizers |
Sep. 1, 1981 |
| 4217333 |
Process for the production of potassium magnesium phosphate |
Aug. 12, 1980 |
| 4205049 |
Water injection for control of fines for producing defluorinated phosphate rock granules |
May. 27, 1980 |
| 4175943 |
Water-soluble fertilizers |
Nov. 27, 1979 |
| 4167406 |
High temperature decomposition process for producing an alkali-containing calcined phosphate fertilizer |
Sep. 11, 1979 |
| 4160657 |
Preparation of monocalcium phosphate and phosphoric acid |
Jul. 10, 1979 |
| 4158558 |
Potassium polyphosphate fertilizers |
Jun. 19, 1979 |
| 4101637 |
Direct granulation process for triple superphosphate |
Jul. 18, 1978 |
| 4073635 |
Process for producing a slurry suitable for the manufacture of a mixed fertilizer containing nitrogen plus phosphorus |
Feb. 14, 1978 |
| 4008314 |
Manufacture of solid ammonium phosphate |
Feb. 15, 1977 |
| 4006004 |
Phosphate enriched peat moss fertilizer and method therefor including free amino acid supplementation |
Feb. 1, 1977 |
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