GB667135A - Calcium carbonate monohydrate - Google Patents

Calcium carbonate monohydrate

Info

Publication number
GB667135A
GB667135A GB2449349A GB2449349A GB667135A GB 667135 A GB667135 A GB 667135A GB 2449349 A GB2449349 A GB 2449349A GB 2449349 A GB2449349 A GB 2449349A GB 667135 A GB667135 A GB 667135A
Authority
GB
United Kingdom
Prior art keywords
ions
solution containing
carbonate
aqueous solution
calcium
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
GB2449349A
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 GB2449349A priority Critical patent/GB667135A/en
Publication of GB667135A publication Critical patent/GB667135A/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
    • C01F11/18—Carbonates
    • C01F11/182—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by an additive other than CaCO3-seeds

Abstract

Precipitated calcium carbonate monohydrate, claimed as a new compound, is obtained (i) by reacting an aqueous solution containing calcium ions with an aqueous solution containing carbonate ions with stirring in a cold saturated sodium chloride solution containing magnesium ions or glassy sodium polyphosphate of Na2O/P2O5 mol. ratio 1.12/1, or (ii) by adding a solution of sodium carbonate to an aqueous solution containing calcium ions and magnesium ions at room temperature, stirring and allowing to stand for a day; either or both solutions may contain sodium chloride. A suitable concentration of magnesium ions is between 0.05 and 0.5 per cent expressed as magnesium chloride: 300-800 parts polyphosphate per million of the reaction mixture may be used. A molar excess of one reagent, e.g. 3-8 mols. sodium carbonate per mol. calcium chloride, is prepared. The product may be dehydrated to give an hydrous calcium carbonate suitable as a filler for rubber, paint and paper.
GB2449349A 1949-09-23 1949-09-23 Calcium carbonate monohydrate Expired GB667135A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2449349A GB667135A (en) 1949-09-23 1949-09-23 Calcium carbonate monohydrate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2449349A GB667135A (en) 1949-09-23 1949-09-23 Calcium carbonate monohydrate

Publications (1)

Publication Number Publication Date
GB667135A true GB667135A (en) 1952-02-27

Family

ID=10212530

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2449349A Expired GB667135A (en) 1949-09-23 1949-09-23 Calcium carbonate monohydrate

Country Status (1)

Country Link
GB (1) GB667135A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1063587B (en) * 1957-03-26 1959-08-20 Solvay Process for the production of precipitated calcium carbonate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1063587B (en) * 1957-03-26 1959-08-20 Solvay Process for the production of precipitated calcium carbonate

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