GB714378A - Improvements in or relating to activated silica - Google Patents

Improvements in or relating to activated silica

Info

Publication number
GB714378A
GB714378A GB14110/52A GB1411052A GB714378A GB 714378 A GB714378 A GB 714378A GB 14110/52 A GB14110/52 A GB 14110/52A GB 1411052 A GB1411052 A GB 1411052A GB 714378 A GB714378 A GB 714378A
Authority
GB
United Kingdom
Prior art keywords
silica
organic acid
activating
boiling
concentration
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
GB14110/52A
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.)
LABORATOIRES DES PROXYTASES SO
Original Assignee
LABORATOIRES DES PROXYTASES SO
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 LABORATOIRES DES PROXYTASES SO filed Critical LABORATOIRES DES PROXYTASES SO
Publication of GB714378A publication Critical patent/GB714378A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
    • A61K9/141—Intimate drug-carrier mixtures characterised by the carrier, e.g. ordered mixtures, adsorbates, solid solutions, eutectica, co-dried, co-solubilised, co-kneaded, co-milled, co-ground products, co-precipitates, co-evaporates, co-extrudates, co-melts; Drug nanoparticles with adsorbed surface modifiers
    • A61K9/143—Intimate drug-carrier mixtures characterised by the carrier, e.g. ordered mixtures, adsorbates, solid solutions, eutectica, co-dried, co-solubilised, co-kneaded, co-milled, co-ground products, co-precipitates, co-evaporates, co-extrudates, co-melts; Drug nanoparticles with adsorbed surface modifiers with inorganic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
    • 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
    • C01B33/152—Preparation of hydrogels
    • C01B33/154—Preparation of hydrogels by acidic treatment of aqueous silicate solutions

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Analytical Chemistry (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Silicon Compounds (AREA)

Abstract

Activated silica is obtained by precipitating silica at ambient temperature from an alkali metal silicate by means of an organic acid washing the silica with water, drying below 250 DEG C., activating by boiling with a solution of an organic acid having a concentration of 5 per cent. by weight or less washing again with water and drying below 250 DEG C. Acetic acid is preferred for both preparation and activation but tartoric or sulicylic acids may be used. The alkalic metal silicate, preferably sodium, may be prepared by the action of the corresponding base on silicon tetrafluoride and thus be iron-free. After use, for example, as an absorbent of hormones, the silica may be reactivated by boiling with an aqueous solution of an alkali metal hydroxide having a concentration of 5 per cent. by weight or less, and activating with the organic acid as above.
GB14110/52A 1951-06-16 1952-06-04 Improvements in or relating to activated silica Expired GB714378A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR956096X 1951-06-16

Publications (1)

Publication Number Publication Date
GB714378A true GB714378A (en) 1954-08-25

Family

ID=9487717

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14110/52A Expired GB714378A (en) 1951-06-16 1952-06-04 Improvements in or relating to activated silica

Country Status (3)

Country Link
DE (1) DE956096C (en)
FR (1) FR1045802A (en)
GB (1) GB714378A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1912786B1 (en) * 2005-07-19 2019-04-03 Pilkington Group Limited Fire resistant glazings

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE428041C (en) * 1924-06-21 1926-04-26 J G Farbenindustrie Akt Ges Production of strongly adsorbing silica
DE665099C (en) * 1934-12-22 1938-09-21 Prod Silgelac Soc Process for the production of a silica gel or hydrogel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1912786B1 (en) * 2005-07-19 2019-04-03 Pilkington Group Limited Fire resistant glazings

Also Published As

Publication number Publication date
FR1045802A (en) 1953-12-01
DE956096C (en) 1957-01-10

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