GB888085A - Process for treating waste waters obtained in the production of phosphorus - Google Patents
Process for treating waste waters obtained in the production of phosphorusInfo
- Publication number
- GB888085A GB888085A GB1502360A GB1502360A GB888085A GB 888085 A GB888085 A GB 888085A GB 1502360 A GB1502360 A GB 1502360A GB 1502360 A GB1502360 A GB 1502360A GB 888085 A GB888085 A GB 888085A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phosphorus
- tank
- lime
- production
- neutralized
- 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
- C01B25/003—Phosphorus
-
- 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
- C01B25/01—Treating phosphate ores or other raw phosphate materials to obtain phosphorus or phosphorus compounds
-
- 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
- C01B25/322—Preparation by neutralisation of orthophosphoric acid
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Removal Of Specific Substances (AREA)
Abstract
<PICT:0888085/III/1> Waste waters obtained in the production of phosphorus, containing suspended and colloidal phosphorus, SiF6-and Ca++ ions and phosphoric acid, are neutralized to a pH between 6 and 8 by the addition of an aqueous solution or suspension of an alkali metal hydroxide and/or alkaline earth metal hydroxide to form a flocculent precipitate which is allowed to settle and removed. The alkali may be milk of lime or lime water containing sodium hydroxide. As shown, waste water in tank 1 is neutralized by milk of lime introduced through a valve 5 controlled by an antimony electrode 3 and pH-controller 4. Calcium phosphates are precipitated in tank 1 in the form of flocks which envelop suspended phosphorus particles. The liquid then passes to a tank 6 where solids settle and sludge is removed by a pump 7, while purified water is removed by a pump 8. Phosphorus sludge may be removed before neutralization, and the purified waste water may be subjected to a subsequent chlorination. Specification 835,859 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK37740A DE1160376B (en) | 1959-05-14 | 1959-05-14 | Process for the treatment of waste water from phosphorus production |
Publications (1)
Publication Number | Publication Date |
---|---|
GB888085A true GB888085A (en) | 1962-01-24 |
Family
ID=7221127
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1502360A Expired GB888085A (en) | 1959-05-14 | 1960-04-28 | Process for treating waste waters obtained in the production of phosphorus |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1160376B (en) |
GB (1) | GB888085A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3699212A (en) * | 1968-09-19 | 1972-10-17 | Gordon F Palm | Water systems for phosphate plants |
US4284515A (en) * | 1979-12-10 | 1981-08-18 | Stauffer Chemical Company | Process for decreasing elemental phosphorus levels in an aqueous medium |
DE3046898A1 (en) * | 1979-12-13 | 1981-09-03 | Hooker Chemicals & Plastics Corp., 14302 Niagara Falls, N.Y. | Elementary phosphorus removal from waste waters - by precipitating soluble phosphate, filtering and passing filtrate through adsorbent column |
US4402833A (en) * | 1979-12-13 | 1983-09-06 | Occidental Chemical Corporation | Waste water treatment system for elemental phosphorous removal |
CN111453710A (en) * | 2020-05-20 | 2020-07-28 | 无锡中天固废处置有限公司 | Method for preparing disodium hydrogen phosphate from metal-containing phosphoric acid waste liquid of switch production process |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3314248A1 (en) * | 1983-04-20 | 1984-10-25 | Krupp-Koppers Gmbh, 4300 Essen | Process for treating the waste water produced in the production of wet phosphoric acid |
-
1959
- 1959-05-14 DE DEK37740A patent/DE1160376B/en active Pending
-
1960
- 1960-04-28 GB GB1502360A patent/GB888085A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3699212A (en) * | 1968-09-19 | 1972-10-17 | Gordon F Palm | Water systems for phosphate plants |
US4284515A (en) * | 1979-12-10 | 1981-08-18 | Stauffer Chemical Company | Process for decreasing elemental phosphorus levels in an aqueous medium |
DE3046898A1 (en) * | 1979-12-13 | 1981-09-03 | Hooker Chemicals & Plastics Corp., 14302 Niagara Falls, N.Y. | Elementary phosphorus removal from waste waters - by precipitating soluble phosphate, filtering and passing filtrate through adsorbent column |
US4402833A (en) * | 1979-12-13 | 1983-09-06 | Occidental Chemical Corporation | Waste water treatment system for elemental phosphorous removal |
CN111453710A (en) * | 2020-05-20 | 2020-07-28 | 无锡中天固废处置有限公司 | Method for preparing disodium hydrogen phosphate from metal-containing phosphoric acid waste liquid of switch production process |
CN111453710B (en) * | 2020-05-20 | 2023-05-12 | 无锡中天固废处置有限公司 | Method for preparing disodium hydrogen phosphate from metal-containing phosphoric acid waste liquid in switch production process |
Also Published As
Publication number | Publication date |
---|---|
DE1160376B (en) | 1963-12-27 |
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