GB888085A - Process for treating waste waters obtained in the production of phosphorus - Google Patents

Process for treating waste waters obtained in the production of phosphorus

Info

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
Application number
GB1502360A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Knapsack AG
Knapsack Griesheim AG
Original Assignee
Knapsack AG
Knapsack Griesheim AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Knapsack AG, Knapsack Griesheim AG filed Critical Knapsack AG
Publication of GB888085A publication Critical patent/GB888085A/en
Expired legal-status Critical Current

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.
GB1502360A 1959-05-14 1960-04-28 Process for treating waste waters obtained in the production of phosphorus Expired GB888085A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (6)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
GB1298927A (en) Removal of fluorine values from aqueous solutions of fluosilicic acid
EP0129260A2 (en) Process and composition for conditioning an aqueous system
GB888085A (en) Process for treating waste waters obtained in the production of phosphorus
GB970992A (en) A process for the extraction of lithium from its ore
GB1514023A (en) Waste treatment of fluoroborate solutions
JPS5771693A (en) Method of removing phosphate ion contained in liquid
FR2382406A1 (en) Neutralising acid contg. liquors esp. metal cleaning liquors - using chalk of particle size below a half milli-meter
ES441720A1 (en) Process for the treatment of acidic waste liquid containing dissolved salts
JPH0236317B2 (en)
GB481499A (en) Improvements in and relating to the flocculation of solid in liquid suspensions
GB1334052A (en) Removal of phosphorus from waste liquids
GB992365A (en) Improvements in the clarification of water containing mineral solids
SU148035A1 (en) The method of producing ammonium sulfate
CN211712837U (en) System for removing sulfate in water and water treatment system comprising same
JP2001162287A (en) Method for treating boron-containing water and treatment agent
GB749662A (en) Process for the purification of liquids containing colloidal or suspended substances in very fine division
US1572944A (en) Process of softening water
SU986850A1 (en) Method of producing extraction phosphoric acid
JPS5647526A (en) Nickel removing process
SU136679A1 (en) Sediment compaction method
JPS62277111A (en) Flocculating method for suspended solid matter
US2087264A (en) Process of clarifying water in connection with softening
US2334210A (en) Manganese electrolyte purification
GB118668A (en) Improvements in or relating to Softening Water.
JPS5768200A (en) Treatment of sludge in drinking water