GB1337329A - Finely divided highly active silica - Google Patents

Finely divided highly active silica

Info

Publication number
GB1337329A
GB1337329A GB2023771A GB2023771A GB1337329A GB 1337329 A GB1337329 A GB 1337329A GB 2023771 A GB2023771 A GB 2023771A GB 2023771 A GB2023771 A GB 2023771A GB 1337329 A GB1337329 A GB 1337329A
Authority
GB
United Kingdom
Prior art keywords
silica
finely divided
sioh
highly active
active silica
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
GB2023771A
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.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
Deutsche Gold und Silber Scheideanstalt
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 claimed from DE19702004443 external-priority patent/DE2004443C3/en
Application filed by Degussa GmbH, Deutsche Gold und Silber Scheideanstalt filed Critical Degussa GmbH
Publication of GB1337329A publication Critical patent/GB1337329A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/28—Compounds of silicon
    • C09C1/30—Silicic acid
    • C09C1/3009—Physical treatment, e.g. grinding; treatment with ultrasonic vibrations
    • C09C1/3027—Drying, calcination
    • 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
    • C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
    • C01B33/187—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by acidic treatment of silicates
    • C01B33/193—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by acidic treatment of silicates of aqueous solutions of silicates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
    • C01P2002/82—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by IR- or Raman-data
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity
    • C01P2006/82—Compositional purity water content
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Silicon Compounds (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)

Abstract

1337329 Finely divided active silica DEUTSCHE GOLDUND SILBER-SCHEIDEANSTALT 19 April 1971 [31 Jan 1970] 20237/71 Heading C1A Finely divided, highly active silica is obtained by precipitating silica with acid from an alkali metal silicate solution, filtering off the silica and producing silica with a residual moisture content of 5-15% by weight (if necessary by means of heating), grinding the silica and heat treating the finely divided silica at 700‹ to 1000‹ C. for 1 to 10 seconds, preferably < 2 seconds, in a free-fall shaft in counter-current to a dry gas stream inert with respect to silica (e.g. air). A typical product of the above process is the novel, finely divided, highly active silica having isolated silanol groups (incapable of H-bonding) in its active surface but being completely free from adsorbed water and closely adjacent silanol groups (capable of hydrogen bonding), and having a silanol group density not exceeding 3À33 SiOH/100Š<SP>2</SP>(30Š<SP>2</SP>/SiOH), preferably 0À5 to 2À5 SiOH/100Š<SP>2</SP>.
GB2023771A 1970-01-31 1971-04-19 Finely divided highly active silica Expired GB1337329A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702004443 DE2004443C3 (en) 1970-01-31 Process for the production of finely divided, highly active silica

Publications (1)

Publication Number Publication Date
GB1337329A true GB1337329A (en) 1973-11-14

Family

ID=5761085

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2023771A Expired GB1337329A (en) 1970-01-31 1971-04-19 Finely divided highly active silica

Country Status (3)

Country Link
FR (1) FR2075083A5 (en)
GB (1) GB1337329A (en)
NL (1) NL174035C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4577566A (en) * 1982-04-01 1986-03-25 Betz Laboratories, Inc. Method of conditioning fireside fouling deposits using large particle size amorphous silica

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2611196B1 (en) * 1987-02-25 1990-07-27 Rhone Poulenc Chimie NOVEL LOW-RECOVERY PRECIPITATION SILICAS, THEIR PREPARATION PROCESS AND THEIR APPLICATION TO THE REINFORCEMENT OF SILICON ELASTOMERS

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR74765E (en) * 1958-01-02 1961-01-16 Bayer Ag Process for the calcination of charges of silicic acid and silicates

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4577566A (en) * 1982-04-01 1986-03-25 Betz Laboratories, Inc. Method of conditioning fireside fouling deposits using large particle size amorphous silica

Also Published As

Publication number Publication date
NL7100020A (en) 1971-08-03
DE2004443B2 (en) 1976-02-05
NL174035C (en) 1984-04-16
NL174035B (en) 1983-11-16
FR2075083A5 (en) 1971-10-08
DE2004443A1 (en) 1971-08-05

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee