CA952394A - Microporous membrane process for making concentrated silica sols - Google Patents

Microporous membrane process for making concentrated silica sols

Info

Publication number
CA952394A
CA952394A CA116,479A CA116479A CA952394A CA 952394 A CA952394 A CA 952394A CA 116479 A CA116479 A CA 116479A CA 952394 A CA952394 A CA 952394A
Authority
CA
Canada
Prior art keywords
microporous membrane
membrane process
silica sols
concentrated silica
making concentrated
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
CA116,479A
Other versions
CA116479S (en
Inventor
Ralph K. Iler
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to US05/375,943 priority Critical patent/US3969266A/en
Application granted granted Critical
Publication of CA952394A publication Critical patent/CA952394A/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
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
    • C01B33/146—After-treatment of sols
    • C01B33/148—Concentration; Drying; Dehydration; Stabilisation; Purification
    • 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
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
    • C01B33/141—Preparation of hydrosols or aqueous dispersions
    • C01B33/142—Preparation of hydrosols or aqueous dispersions by acidic treatment of silicates
    • C01B33/143—Preparation of hydrosols or aqueous dispersions by acidic treatment of silicates of aqueous solutions of silicates
CA116,479A 1970-07-14 1971-06-23 Microporous membrane process for making concentrated silica sols Expired CA952394A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/375,943 US3969266A (en) 1971-06-23 1973-07-02 Microporous membrane process for making concentrated silica sols

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5486470A 1970-07-14 1970-07-14

Publications (1)

Publication Number Publication Date
CA952394A true CA952394A (en) 1974-08-06

Family

ID=21993998

Family Applications (1)

Application Number Title Priority Date Filing Date
CA116,479A Expired CA952394A (en) 1970-07-14 1971-06-23 Microporous membrane process for making concentrated silica sols

Country Status (5)

Country Link
AU (1) AU466368B2 (en)
CA (1) CA952394A (en)
DE (1) DE2134974A1 (en)
FR (1) FR2101652A5 (en)
GB (1) GB1348705A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4216119C2 (en) * 1992-05-15 1995-08-10 Bayer Ag Process for the preparation and concentration of silica sols
DE4219764A1 (en) * 1992-06-17 1993-12-23 Bayer Ag Cyclopolymerizable fluorine compounds, process for their preparation and thermoplastic fluoropolymers obtainable therefrom

Also Published As

Publication number Publication date
GB1348705A (en) 1974-03-20
FR2101652A5 (en) 1972-03-31
AU466368B2 (en) 1975-10-30
DE2134974A1 (en) 1972-01-20
AU3117071A (en) 1973-01-18

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