GB1012892A - Process for the preparation of modified silica gels - Google Patents

Process for the preparation of modified silica gels

Info

Publication number
GB1012892A
GB1012892A GB1713464A GB1713464A GB1012892A GB 1012892 A GB1012892 A GB 1012892A GB 1713464 A GB1713464 A GB 1713464A GB 1713464 A GB1713464 A GB 1713464A GB 1012892 A GB1012892 A GB 1012892A
Authority
GB
United Kingdom
Prior art keywords
gel
sol
silica
metal salt
hydrous
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
GB1713464A
Inventor
Ellsworth George Acker
Forest Rayburn Hurley
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.)
WR Grace and Co
Original Assignee
WR Grace 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
Priority to US230726A priority Critical patent/US3313739A/en
Application filed by WR Grace and Co filed Critical WR Grace and Co
Priority to GB1713464A priority patent/GB1012892A/en
Priority to DE19641267667 priority patent/DE1267667B/en
Publication of GB1012892A publication Critical patent/GB1012892A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • 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
    • C01B33/141—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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Silicon Compounds (AREA)

Abstract

A silica gel containing a hydrous metal oxide is prepared by incorporating in a silica sol 2 to 6 weight per cent based on the silica content of the sol of a metal salt which can be hydrolysed to a hydrous oxide, gelling the sol, washing the gel with acidic water and activating the gel. The metal salt may be the bromide, chloride, iodide, sulphate or nitrate of germanium, zirconium, tin, hafnium, lead, thorium, or cerium or a basic aluminium salt. The amount of metal salt is preferably such that the gel contains 0.5 to 2.5% by weight of the hydrous metal oxide based on the weight of silica in the gel. The silica sol may be prepared by the hydrolysis of silicon tetrachloride or tetrafluoride or ethyl orthosilicate or by the reaction of an alkali metal silicate and a mineral salt. The metal salt, in solution in the minimum amount of water, or as a liquid, is added to the sol, or the metal salt plus sulphuric acid may be added to sodium silicate. The mixture is allowed to gel for e.g. 15 to 30 minutes and the gel after ageing for several hours at 50-70 DEG C. with water at pH 2.5-3.5. After drying and activation the total volatiles in the gel is no more than 7%. The gels show high absorptive capacity at low relative humidities (see Division B1).ALSO:A silica gel containing a hydrous metal oxide e.g. of Ti, Ge, Zr, Sn, Hf, Pb, Th and Ce, is prepared by incorporating in a silica sol 2-6% by weight based on the silica content of the sol of a metal salt which can be hydrolysed to a hydrous oxide, gelling the sol, washing the gel with acidic water and activating the gel. The gel shows an increased adsorptive capacity for water at relative humidities below 30%, and is particularly useful for drying "Freon" (Registered Trade Mark) natural gas and air.
GB1713464A 1962-10-15 1964-04-24 Process for the preparation of modified silica gels Expired GB1012892A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US230726A US3313739A (en) 1962-10-15 1962-10-15 Process for the preparation of silica gel
GB1713464A GB1012892A (en) 1964-04-24 1964-04-24 Process for the preparation of modified silica gels
DE19641267667 DE1267667B (en) 1964-04-24 1964-05-06 Silica gel as an adsorbent for gas mixtures with a relative moisture content of less than 30%

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1713464A GB1012892A (en) 1964-04-24 1964-04-24 Process for the preparation of modified silica gels

Publications (1)

Publication Number Publication Date
GB1012892A true GB1012892A (en) 1965-12-08

Family

ID=10089888

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1713464A Expired GB1012892A (en) 1962-10-15 1964-04-24 Process for the preparation of modified silica gels

Country Status (1)

Country Link
GB (1) GB1012892A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0691305A1 (en) * 1994-07-06 1996-01-10 ENIRICERCHE S.p.A. Micro-mesoporous gel and process for its preparation
EP1260484A2 (en) * 2001-05-25 2002-11-27 Tokuyama Corporation A process for preparing a flocculant for water treatment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0691305A1 (en) * 1994-07-06 1996-01-10 ENIRICERCHE S.p.A. Micro-mesoporous gel and process for its preparation
EP1260484A2 (en) * 2001-05-25 2002-11-27 Tokuyama Corporation A process for preparing a flocculant for water treatment
EP1260484A3 (en) * 2001-05-25 2003-10-29 Tokuyama Corporation A process for preparing a flocculant for water treatment
US7338617B2 (en) 2001-05-25 2008-03-04 Tokuyama Corporation Process for preparing a flocculant for water treatment

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