GB1356586A - Inhibition of calcium sulphate scale formation - Google Patents
Inhibition of calcium sulphate scale formationInfo
- Publication number
- GB1356586A GB1356586A GB5386970A GB5386970A GB1356586A GB 1356586 A GB1356586 A GB 1356586A GB 5386970 A GB5386970 A GB 5386970A GB 5386970 A GB5386970 A GB 5386970A GB 1356586 A GB1356586 A GB 1356586A
- Authority
- GB
- United Kingdom
- Prior art keywords
- additive
- washing
- liquors
- sulphonic acid
- caso
- 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
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 title abstract 4
- 235000011132 calcium sulphate Nutrition 0.000 title abstract 2
- 239000001175 calcium sulphate Substances 0.000 title abstract 2
- 230000015572 biosynthetic process Effects 0.000 title 1
- 230000005764 inhibitory process Effects 0.000 title 1
- 239000000654 additive Substances 0.000 abstract 6
- 230000000996 additive effect Effects 0.000 abstract 6
- 238000005406 washing Methods 0.000 abstract 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract 2
- 150000004996 alkyl benzenes Chemical class 0.000 abstract 2
- -1 alkylaryl sulphonic acid Chemical compound 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-N sulfonic acid Chemical compound OS(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-N 0.000 abstract 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 abstract 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 abstract 1
- 125000000217 alkyl group Chemical group 0.000 abstract 1
- 125000002947 alkylene group Chemical group 0.000 abstract 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract 1
- 125000004432 carbon atom Chemical group C* 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 230000008021 deposition Effects 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000007791 liquid phase Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
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
- C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
- C01B25/223—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen only one form of calcium sulfate being formed
- C01B25/226—Hemihydrate process
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Detergent Compositions (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
1356586 Calcium sulphate wash liquors FISONS Ltd 12 Nov 1971 [12 Nov 1970 16 Jan 1971 15 Feb 1971 24 Sept 1971] 53869/70 16 Jan 1971 15 Feb 1971 and 24 Sept 1971 Heading C1A Deposition of CaSO 4 from the liquors from washing CaSO 4 .¢H 2 O is reduced by bringing the liquors into contact with an additive before or during washing, the additive being an alkylaryl sulphonic acid or an alkylene oxide condensate of an alcohol, phenol or an alkyl phenol or derivatives or mixtures of the foregoing. Where the additive is an alkylbenzene sulphonic acid or derivative the alkyl group preferably contains 8 to 16 carbon atoms. A preferred additive comprises 50-80% of a C9-11 alkylbenzene sulphonic acid or derivative thereof with a condensate formed from 5 to 15 moles ethylene oxide per mole of octyl- or nohylphenol. The washing may be carried out in a number of stages and the additive may be added to the slurry prior to filtration, the filtered crystals or the liquids used for washing. The additive concentration is preferably 0À0002 to 0À3% by weight of the liquid phase and a temperature of 20 to 90‹ C. is preferred. The process is especially suitable for use in conjunction with the wet process for the manufacture of phosphoric acid.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5386970A GB1356586A (en) | 1970-11-12 | 1970-11-12 | Inhibition of calcium sulphate scale formation |
| DE19712155617 DE2155617B2 (en) | 1970-11-12 | 1971-11-09 | Method for reducing the rate of formation of calcium sulfate dihydrate precipitates when washing calcium sulfate hemihydrate crystals |
| SE1444671A SE371424B (en) | 1970-11-12 | 1971-11-11 | |
| BR751971A BR7107519D0 (en) | 1970-11-12 | 1971-11-11 | PROCESS TO REDUCE CRUSTING |
| ZA717610A ZA717610B (en) | 1970-11-12 | 1971-11-12 | Process for reducing scale deposition |
| ES71396936A ES396936A1 (en) | 1970-11-12 | 1971-11-12 | A procedure to reduce the deposit of calcium sulfate from washing liquids, during the washing of calcium sulfate hemihydrate. (Machine-translation by Google Translate, not legally binding) |
| FR7140486A FR2114584A5 (en) | 1970-11-12 | 1971-11-12 | |
| JP7189992A JPS5510543B1 (en) | 1970-11-12 | 1971-11-12 | |
| NL7115613A NL169576C (en) | 1970-11-12 | 1971-11-12 | PROCESS FOR REDUCING THE FORMATION OF COAT DURING THE WASHING OF CALCIUM SULPHATE-SEMI-HYDRATE CRYSTALS. |
| US05/522,265 US4049774A (en) | 1970-11-12 | 1974-11-08 | Process for reducing formation of gypsum scale durng the washing of calcium sulphate hemihydrate crystals |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5386970A GB1356586A (en) | 1970-11-12 | 1970-11-12 | Inhibition of calcium sulphate scale formation |
| GB222571 | 1971-01-16 | ||
| GB469071 | 1971-02-15 | ||
| GB4456071 | 1971-09-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1356586A true GB1356586A (en) | 1974-06-12 |
Family
ID=27447220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5386970A Expired GB1356586A (en) | 1970-11-12 | 1970-11-12 | Inhibition of calcium sulphate scale formation |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5510543B1 (en) |
| DE (1) | DE2155617B2 (en) |
| FR (1) | FR2114584A5 (en) |
| GB (1) | GB1356586A (en) |
| NL (1) | NL169576C (en) |
| SE (1) | SE371424B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4049774A (en) | 1970-11-12 | 1977-09-20 | Fisons Limited | Process for reducing formation of gypsum scale durng the washing of calcium sulphate hemihydrate crystals |
| US4221769A (en) * | 1972-11-08 | 1980-09-09 | Fisons Limited | Process for preventing the formation of calcium sulphate scale |
| US4313915A (en) * | 1976-11-30 | 1982-02-02 | Produits Chimiques De La Montagne Noire | Method for the manufacture of phosphoric acid by the wet process |
-
1970
- 1970-11-12 GB GB5386970A patent/GB1356586A/en not_active Expired
-
1971
- 1971-11-09 DE DE19712155617 patent/DE2155617B2/en not_active Withdrawn
- 1971-11-11 SE SE1444671A patent/SE371424B/xx unknown
- 1971-11-12 JP JP7189992A patent/JPS5510543B1/ja active Pending
- 1971-11-12 FR FR7140486A patent/FR2114584A5/fr not_active Expired
- 1971-11-12 NL NL7115613A patent/NL169576C/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4049774A (en) | 1970-11-12 | 1977-09-20 | Fisons Limited | Process for reducing formation of gypsum scale durng the washing of calcium sulphate hemihydrate crystals |
| US4221769A (en) * | 1972-11-08 | 1980-09-09 | Fisons Limited | Process for preventing the formation of calcium sulphate scale |
| US4313915A (en) * | 1976-11-30 | 1982-02-02 | Produits Chimiques De La Montagne Noire | Method for the manufacture of phosphoric acid by the wet process |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2155617B2 (en) | 1980-01-24 |
| NL7115613A (en) | 1972-05-16 |
| DE2155617A1 (en) | 1972-05-25 |
| SE371424B (en) | 1974-11-18 |
| JPS5510543B1 (en) | 1980-03-17 |
| NL169576B (en) | 1982-03-01 |
| NL169576C (en) | 1982-08-02 |
| FR2114584A5 (en) | 1972-06-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |