GB1265580A - - Google Patents

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Publication number
GB1265580A
GB1265580A GB1265580DA GB1265580A GB 1265580 A GB1265580 A GB 1265580A GB 1265580D A GB1265580D A GB 1265580DA GB 1265580 A GB1265580 A GB 1265580A
Authority
GB
United Kingdom
Prior art keywords
suspension
calcium sulphate
phosphoric acid
surfactant
chain alkyl
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
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 filed Critical
Publication of GB1265580A publication Critical patent/GB1265580A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/46—Sulfates
    • 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)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Liquid Carbonaceous Fuels (AREA)

Abstract

1,265,580. Phosphoric acid; calcium sulphate agglomerates. CANADIAN PATENTS & DEVELOPMENT Ltd. 23 May, 1969 [10 July, 1968], No. 26536/69. Heading C1A. Phosphoric acid is separated from a suspension of gelatinous or finely divided calcium sulphate by agitating the suspension with a surfactant which is a straight or branched chain alkyl benzene sulphonic acid or salt thereof, a straight chain alkyl sulphate or a petroleun sulphonate and with a bridging liquid comprising a petroleum or other hydrocarbon liquid until agglomerates of precipitate form. The agitation preferably comprises a horizontal reciprocating motion followed by a rolling motion of slower speed. The surfactant is preferably used in an amount of 0À1-4% wt. based on the calcium sulphate. The bridging liquid, preferably in an amount of from 10-150% vol. based on the calcium sulphate, may be naphtha, kerosene, fuel oil, gas oil or a petroleum aliphatic solvent. The suspension may be formed by reacting phosphate rock with concentrated phosphoric acid and the resultant superphosphate suspension reacted with sulphuric acid.
GB1265580D 1968-07-10 1969-05-23 Expired GB1265580A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 24756 CA880214A (en) 1968-07-10 1968-07-10 Recovering phosphoric acid

Publications (1)

Publication Number Publication Date
GB1265580A true GB1265580A (en) 1972-03-01

Family

ID=4084364

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1265580D Expired GB1265580A (en) 1968-07-10 1969-05-23

Country Status (2)

Country Link
CA (1) CA880214A (en)
GB (1) GB1265580A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010080806A1 (en) * 2009-01-06 2010-07-15 Nalco Company Modification of precipitate morphology and settling characteristics in acid conditions

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1451608A (en) * 1972-11-08 1976-10-06 Fisons Ltd Process for reducing calcium sulphate scale formation
US5211928A (en) * 1991-10-15 1993-05-18 Calgon Corporation Method of improving gypsum slurry filtration in the production of phosphoric acid
US5173280A (en) * 1991-10-15 1992-12-22 Calgon Corporation Method of clarifying phosphoric acid using high charge sulfonic-type polymers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010080806A1 (en) * 2009-01-06 2010-07-15 Nalco Company Modification of precipitate morphology and settling characteristics in acid conditions

Also Published As

Publication number Publication date
CA880214A (en) 1971-09-07

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees