UST962001I4 - Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds - Google Patents
Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds Download PDFInfo
- Publication number
- UST962001I4 UST962001I4 US05/730,210 US73021076A UST962001I4 US T962001 I4 UST962001 I4 US T962001I4 US 73021076 A US73021076 A US 73021076A US T962001 I4 UST962001 I4 US T962001I4
- Authority
- US
- United States
- Prior art keywords
- sulfur dioxide
- phosphate
- dicalcium phosphate
- carbonyl
- filtrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title abstract 12
- 235000019739 Dicalciumphosphate Nutrition 0.000 title abstract 5
- 239000001506 calcium phosphate Substances 0.000 title abstract 5
- NEFBYIFKOOEVPA-UHFFFAOYSA-K dicalcium phosphate Chemical compound [Ca+2].[Ca+2].[O-]P([O-])([O-])=O NEFBYIFKOOEVPA-UHFFFAOYSA-K 0.000 title abstract 5
- 229940038472 dicalcium phosphate Drugs 0.000 title abstract 5
- 229910000390 dicalcium phosphate Inorganic materials 0.000 title abstract 5
- 239000002367 phosphate rock Substances 0.000 title abstract 4
- 150000001728 carbonyl compounds Chemical class 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract 2
- 238000000034 method Methods 0.000 abstract 5
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 abstract 3
- 239000012065 filter cake Substances 0.000 abstract 3
- 239000000706 filtrate Substances 0.000 abstract 3
- 239000007787 solid Substances 0.000 abstract 3
- 239000007788 liquid Substances 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 239000011541 reaction mixture Substances 0.000 abstract 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 1
- 239000011575 calcium Substances 0.000 abstract 1
- 229910052791 calcium Inorganic materials 0.000 abstract 1
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 abstract 1
- 235000010261 calcium sulphite Nutrition 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000007858 starting material Substances 0.000 abstract 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/48—Sulfites
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
- C01B25/324—Preparation from a reaction solution obtained by acidifying with an acid other than orthophosphoric acid
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Fertilizers (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
dicalcium phosphate is prepared from phosphate rock by a process which comprises reacting phosphate rock with sulfur dioxide and an organic carbonyl compound for 0.5 to 10 hours while maintaining the temperature of the reaction mixture below 50° C. The reaction yields a mixture of gangue, solid calcium α-hydroxy sulfonate and soluble dicalcium phosphate. The solids are separated from the liquid and P2 O5 values adhering to the solid are washed free with a mixture of carbonyl, water, and sulfur dioxide. The wash effluent is recycled to the process and both carbonyl and some sulfur dioxide are recovered from the filter cake by heating it. The offgas from the heated filter cake is recycled to the process and the dry filter cake, now largely calcium sulfite hemihydrate, is discarded.
Dicalcium phosphate is precipitated from the reaction mixture filtrate in high yield by partially distilling sulfur dioxide from the filtrate. The precipitated anhydrous dicalcium phosphate is separated from the liquid and dried. Offgas from this drying process as well as both distillate and filtrate is returned to the process. Thus, the only starting materials consumed in the process are phosphate rock and sulfur dioxide. All carbonyl is recovered for recycle.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/730,210 UST962001I4 (en) | 1976-10-06 | 1976-10-06 | Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds |
| US05/779,038 US4113842A (en) | 1976-10-06 | 1977-03-18 | Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/730,210 UST962001I4 (en) | 1976-10-06 | 1976-10-06 | Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US05/779,038 Continuation US4113842A (en) | 1976-10-06 | 1977-03-18 | Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST962001I4 true UST962001I4 (en) | 1977-09-06 |
Family
ID=24934408
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US05/730,210 Pending UST962001I4 (en) | 1976-10-06 | 1976-10-06 | Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds |
| US05/779,038 Expired - Lifetime US4113842A (en) | 1976-10-06 | 1977-03-18 | Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US05/779,038 Expired - Lifetime US4113842A (en) | 1976-10-06 | 1977-03-18 | Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds |
Country Status (1)
| Country | Link |
|---|---|
| US (2) | UST962001I4 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4177052A (en) * | 1977-05-06 | 1979-12-04 | Karl Entzmann | Process for preparing dicalcium phosphate containing fertilizer |
| US4238459A (en) * | 1978-09-11 | 1980-12-09 | Tennessee Valley Authority | Chemical beneficiation of phosphatic limestone and phosphate rock with α-hydroxysulfonic acids |
| US4252553A (en) * | 1979-05-11 | 1981-02-24 | Pircon Ladislav J | Process for production of fertilizers |
| US4395356A (en) * | 1980-11-28 | 1983-07-26 | Shell Oil Company | Method for removing catalyst residues from solutions of poly-1-butene |
| EP0108080A1 (en) * | 1982-05-05 | 1984-05-16 | Commonwealth Scientific And Industrial Research Organisation | Phosphate ore beneficiation |
| US4704263A (en) * | 1985-06-24 | 1987-11-03 | Advanced Separation Technologies Incorporated | Production of potassium phosphates by ion exchange |
| US4944997A (en) * | 1988-11-18 | 1990-07-31 | Xerox Corporation | Electrostatographic recording material |
| US5653782A (en) * | 1994-12-26 | 1997-08-05 | Rotem Amfert Negev Ltd. | Process for the manufacture of sulfur-containing fertilizers |
| WO2010151574A2 (en) | 2009-06-25 | 2010-12-29 | Shell Oil Company | Water injection systems and methods |
| AU2011323322B2 (en) | 2010-11-05 | 2015-03-12 | Shell Internationale Research Maatschappij B.V. | Treating biomass to produce materials useful for biofuels |
| BR112014027355B1 (en) | 2012-05-07 | 2020-12-29 | Shell Internationale Research Maatschappij B.V. | continuous or semi-continuous process to treat biomass |
| RU2627403C1 (en) * | 2016-03-03 | 2017-08-08 | Акционерное общество "Минерально-химическая компания "ЕвроХим" | Solid phosphate salt and method of its production |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1137806A (en) * | 1914-06-17 | 1915-05-04 | Robert Stewart | Process of producing acid monocalcium phosphate. |
| US1251741A (en) * | 1917-06-07 | 1918-01-01 | Carroll Allen | Process of treating phosphate materials. |
| US1981145A (en) * | 1933-10-21 | 1934-11-20 | Minerals Separation North Us | Process of producing phosphoric acid |
-
1976
- 1976-10-06 US US05/730,210 patent/UST962001I4/en active Pending
-
1977
- 1977-03-18 US US05/779,038 patent/US4113842A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US4113842A (en) | 1978-09-12 |
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