GB856247A - Improvements in and relating to filtration processes - Google Patents

Improvements in and relating to filtration processes

Info

Publication number
GB856247A
GB856247A GB1668/58A GB166858A GB856247A GB 856247 A GB856247 A GB 856247A GB 1668/58 A GB1668/58 A GB 1668/58A GB 166858 A GB166858 A GB 166858A GB 856247 A GB856247 A GB 856247A
Authority
GB
United Kingdom
Prior art keywords
hydrolysed
sodium salt
slurry
wetting agent
polyacrylonitrile
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
GB1668/58A
Inventor
Arthur Glover Tallentire
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB1668/58A priority Critical patent/GB856247A/en
Priority to FR784278A priority patent/FR1221875A/en
Publication of GB856247A publication Critical patent/GB856247A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B11/00—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes
    • C05B11/04—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid
    • C05B11/08—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using sulfuric acid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D37/00—Processes of filtration
    • B01D37/03—Processes of filtration using flocculating agents
    • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

Filtration of a gypsum-water slurry is improved by prior addition of a small quantity of a polyelectrolyte and of a wetting agent. Examples of polyelectrolytes: 60% hydrolysed polyacrylonitrile, sodium salt of 90% hydrolysed polyacrylonitrile, sodium salt of 100% hydrolysed polyethacrylonitrile, ammonium salt of 100% hydrolysed polymethacrylonitrile, sodium salt of methylene dinaphthalene sulphonic acid, alkali and ammonium salts of polysulphonic acids. p Example of wetting agent: a 30% aqueous solution of octyl phenol-ethylene oxide condensate. Quantities: 0.001 to 0.3 gram per 100 ccs. of slurry. The slurry obtained as a by-product in the treatment of rock phosphate with sulphuric acid and containing phosphoric acid was treated.ALSO:Filtration of a gypsum-water slurry is improved by prior addition of a small quantity of a polyelectrolyte and of a wetting agent. Examples of polyelectrolytes : 60% hydrolysed polyacrylonitrile, sodium salt of 90% hydrolysed polyacrylonitrile, sodium salt of 100% hydrolysed polyethacrylonitrile, ammonium salt of 100% hydrolysed polymethacrylonitrile, sodium salt of methylene dinaphthalene sulphonic acid, alkali and ammonium salts of polysulphonic acids. Example of wetting agent : a 30% aqueous solution of octyl phenolethylene oxide condensate. Quantities : 0,001 to 0,3 gram per 100 ccs. of slurry. The slurry obtained as a by-product in the treatment of rock phosphate with sulphuric acid was treated.
GB1668/58A 1958-01-17 1958-01-17 Improvements in and relating to filtration processes Expired GB856247A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1668/58A GB856247A (en) 1958-01-17 1958-01-17 Improvements in and relating to filtration processes
FR784278A FR1221875A (en) 1958-01-17 1959-01-17 Slurry filtration process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1668/58A GB856247A (en) 1958-01-17 1958-01-17 Improvements in and relating to filtration processes

Publications (1)

Publication Number Publication Date
GB856247A true GB856247A (en) 1960-12-14

Family

ID=9725979

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1668/58A Expired GB856247A (en) 1958-01-17 1958-01-17 Improvements in and relating to filtration processes

Country Status (2)

Country Link
FR (1) FR1221875A (en)
GB (1) GB856247A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0094745A2 (en) * 1982-05-14 1983-11-23 Imperial Chemical Industries Plc Filtration
US4596661A (en) * 1985-02-04 1986-06-24 Calgon Corporation Method for settling calcium carbonate
CN100463720C (en) * 2007-06-22 2009-02-25 天津大学 Phase-transferring catalyst containing dinaphthalene chiral double-spiral quaternary ammonium and its production

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5613099A (en) * 1979-07-10 1981-02-07 Nichireki Chem Ind Co Ltd Treating method of sludge

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0094745A2 (en) * 1982-05-14 1983-11-23 Imperial Chemical Industries Plc Filtration
EP0094745A3 (en) * 1982-05-14 1986-09-17 Imperial Chemical Industries Plc Filtration
US4596661A (en) * 1985-02-04 1986-06-24 Calgon Corporation Method for settling calcium carbonate
CN100463720C (en) * 2007-06-22 2009-02-25 天津大学 Phase-transferring catalyst containing dinaphthalene chiral double-spiral quaternary ammonium and its production

Also Published As

Publication number Publication date
FR1221875A (en) 1960-06-07

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