GB1250191A - - Google Patents
Info
- Publication number
- GB1250191A GB1250191A GB1250191DA GB1250191A GB 1250191 A GB1250191 A GB 1250191A GB 1250191D A GB1250191D A GB 1250191DA GB 1250191 A GB1250191 A GB 1250191A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gypsum
- caso
- filtration
- phosphoric acid
- aqueous solution
- 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.)
- Expired
Links
Classifications
-
- 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
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
1,250,191. Phosphoric acid; gypsum. FISONS Ltd. 17 June, 1969 [4 July, 1968], No. 31982/68. Heading C1A. A prior process described in Specification 1,135,951 for the production of phosphoric acid and calcium sulphate semihydrate in three stages is modified by the addition of a fourth stage in which the washed CaSO 4 .¢H 2 O is recrystallized to form gypsum in an aqueous solution at a temperature of 30-70‹ C., the solution containing 2À5-10% by weight of H 2 SO 4 and having an H 2 SO 4 : P 2 O 5 ratio in the range 0À6- 3À4 : 1 and subsequently separating gypsum crystals from the aqueous solution by filtration, part of the filtrate resulting from the filtration of the gypsum crystals being used as at least part of the third-stage wash for the CaSO 4 .¢H 2 O.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3198268 | 1968-07-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1250191A true GB1250191A (en) | 1971-10-20 |
Family
ID=10331279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1250191D Expired GB1250191A (en) | 1968-07-04 | 1968-07-04 |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5417597B1 (en) |
| AT (1) | AT301486B (en) |
| BE (1) | BE735078A (en) |
| BR (1) | BR6910443D0 (en) |
| DE (1) | DE1933692B2 (en) |
| ES (1) | ES369090A2 (en) |
| FR (1) | FR2012292A6 (en) |
| GB (1) | GB1250191A (en) |
| NL (1) | NL6910092A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4309395A (en) * | 1980-04-21 | 1982-01-05 | Hauge Douglas O | Phosphoric acid production |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4029743A (en) * | 1975-12-24 | 1977-06-14 | Hauge Douglas O | Phosphoric acid manufacture |
| US4424196A (en) * | 1982-06-29 | 1984-01-03 | United States Gypsum Company | Phosphohemihydrate process for purification of gypsum |
| US4853201A (en) * | 1988-07-11 | 1989-08-01 | Occidental Chemical Corporation | Recovery of P2 O5 values from phosphoric acid hemihydrate crystals |
| DE19817245A1 (en) * | 1998-04-18 | 1999-10-28 | Loh Kg Rittal Werk | switch cabinet |
| DE102016212242B4 (en) | 2016-07-05 | 2019-02-07 | Technische Universität Bergakademie Freiberg | Process for the production of phosphoric acid from phosphorus-containing primary and secondary raw materials |
-
1968
- 1968-07-04 GB GB1250191D patent/GB1250191A/en not_active Expired
-
1969
- 1969-06-24 BE BE735078D patent/BE735078A/xx not_active IP Right Cessation
- 1969-07-01 AT AT627669A patent/AT301486B/en not_active IP Right Cessation
- 1969-07-01 NL NL6910092A patent/NL6910092A/xx unknown
- 1969-07-03 ES ES369090A patent/ES369090A2/en not_active Expired
- 1969-07-03 FR FR6922500A patent/FR2012292A6/fr not_active Expired
- 1969-07-03 DE DE19691933692 patent/DE1933692B2/en not_active Withdrawn
- 1969-07-04 JP JP5253869A patent/JPS5417597B1/ja active Pending
- 1969-07-04 BR BR21044369A patent/BR6910443D0/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4309395A (en) * | 1980-04-21 | 1982-01-05 | Hauge Douglas O | Phosphoric acid production |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1933692A1 (en) | 1970-01-15 |
| AT301486B (en) | 1972-09-11 |
| ES369090A2 (en) | 1976-11-16 |
| BR6910443D0 (en) | 1973-05-31 |
| FR2012292A6 (en) | 1970-03-20 |
| DE1933692B2 (en) | 1977-06-16 |
| BE735078A (en) | 1969-12-24 |
| NL6910092A (en) | 1970-01-06 |
| JPS5417597B1 (en) | 1979-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES346854A1 (en) | Process for the production of phosphoric acid | |
| GB1250191A (en) | ||
| GB1220963A (en) | Process for the production of phosphoric acid at a high concentration and gypsum by-product of improved quality | |
| BR7308671D0 (en) | A PROCESS FOR THE WASHING OF CRYSTAL CRYSTAL CRYSTAL CRYSTAL CRYSTAL AND / OR CALCIUM SULPHATE HEMIHYDRATE, PROCESS FOR THE PRODUCTION OF PHOSPHORIC ACID BY THE VALVE BLOCK DAMP PROCESS | |
| CA951493A (en) | Process for the production of neutral calcium hypochlorite crystals | |
| GB1328357A (en) | Wet process for the manufacture of phosphoric acid and caldium sulphate | |
| GB1481788A (en) | Production of shaped gypsum articles | |
| GB1268396A (en) | Anhydrous calcium sulphate and calcium sulphate semihydrate | |
| GB1184585A (en) | A Method for Manufacturing Pure Gypsum. | |
| AT319132B (en) | Process for the production of anhydrous calcium sulfate II, so-called anhydrite II or dead fire, from synthetic gypsum | |
| ES330957A1 (en) | A continuous procedure for the preparation of phosphoric acid and plaster. (Machine-translation by Google Translate, not legally binding) | |
| ES310115A1 (en) | A procedure for the production of phosphoric acid and gypsum crystals. (Machine-translation by Google Translate, not legally binding) | |
| GB1175577A (en) | A Process for Preparing Phosphoric Acid | |
| JPS52794A (en) | Process for production of high quality gypsum | |
| NL7505135A (en) | PROCESS FOR PREPARING STABILIZED, BONDABLE CALCIUM SULPHATE BY CONVERSION OF CALCIUM COMPOUNDS WITH SULFURIC ACID. | |
| GB1288835A (en) | ||
| CA967722A (en) | Process for purifying sulfuric acid for the catalytic synthesis of hydroxylammonium sulfate | |
| SU376422A1 (en) | METHOD OF OBTAINING A GRADUATE FORM OF 1-LININO-2-NAF-TOL-4-SULFO ACIDS | |
| GB1278247A (en) | Phosphoric acid | |
| JPS5212146A (en) | Process for preparation of p- acetylaminobenzene-sufonylchloride | |
| JPS5248262A (en) | Method of treatment of waste water from phosphoric acid wet production plant | |
| SU526594A1 (en) | The method of producing phosphoric acid | |
| GB1155957A (en) | Phosphoric Acid Purification Process. | |
| GB1398331A (en) | Preparation of phosphoric acid by the wet process | |
| GB1251897A (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |