GB978082A - Process for the manufacture of silicophosphoric acid - Google Patents

Process for the manufacture of silicophosphoric acid

Info

Publication number
GB978082A
GB978082A GB93661A GB93661A GB978082A GB 978082 A GB978082 A GB 978082A GB 93661 A GB93661 A GB 93661A GB 93661 A GB93661 A GB 93661A GB 978082 A GB978082 A GB 978082A
Authority
GB
United Kingdom
Prior art keywords
product
acid
silicophosphoric
ripening
ether
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
GB93661A
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.)
Hoechst AG
Original Assignee
Hoechst AG
Farbwerke Hoechst 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 Hoechst AG, Farbwerke Hoechst AG filed Critical Hoechst AG
Publication of GB978082A publication Critical patent/GB978082A/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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Silicon Compounds (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)

Abstract

Water-soluble crystalline silicophosphoric acid containing SiO2 : P2O5 in the molar ratio of 1 : 1 is produced by mixing finely-divided amorphous silica with phosphoric acid having a concentration of at least 70% by weight P2O5 in such proportions as to have a molar ratio SiO2 : P2O5 within the range 0.3 : 1 to 1.5 : 1, ripening the mixture at 50 DEG to 300 DEG C., removing excess or unreacted phosphoric acid by means of an organic solvent inert towards silicophosphoric acid. The ripening may be assisted by seeding with crystals of the product and/or by kneading. The organic solvent preferably has a boiling-point below 200 DEG C. and may contain a carbonyl, ether, or sulphoxy group, e.g. di-isopropyl ether, di-ethyl ether, formic acid, acetic anhydride, methyl acetate, dimethyl sulphoxide, dioxan, or tetrahydrofuran. The solubility of the product in water may be altered by heating the product for a period of time.
GB93661A 1960-01-07 1961-01-09 Process for the manufacture of silicophosphoric acid Expired GB978082A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF30236A DE1131647B (en) 1960-01-07 1960-01-07 Process for the production of silicophosphoric acid

Publications (1)

Publication Number Publication Date
GB978082A true GB978082A (en) 1964-12-16

Family

ID=7093676

Family Applications (1)

Application Number Title Priority Date Filing Date
GB93661A Expired GB978082A (en) 1960-01-07 1961-01-09 Process for the manufacture of silicophosphoric acid

Country Status (4)

Country Link
BE (1) BE598925A (en)
DE (1) DE1131647B (en)
GB (1) GB978082A (en)
NL (1) NL259616A (en)

Also Published As

Publication number Publication date
BE598925A (en) 1961-07-10
DE1131647B (en) 1962-06-20
NL259616A (en)

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