TW328533B - Process for the production of a precipitated silica - Google Patents

Process for the production of a precipitated silica

Info

Publication number
TW328533B
TW328533B TW083107689A TW83107689A TW328533B TW 328533 B TW328533 B TW 328533B TW 083107689 A TW083107689 A TW 083107689A TW 83107689 A TW83107689 A TW 83107689A TW 328533 B TW328533 B TW 328533B
Authority
TW
Taiwan
Prior art keywords
precipitation
value
surface area
production
filtration
Prior art date
Application number
TW083107689A
Other languages
Chinese (zh)
Inventor
Heinz Esch
Robert Kuhlmann
Matthias Neumuller
Karin Otto
Ralf Rausch
Original Assignee
Degussa
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 Degussa filed Critical Degussa
Application granted granted Critical
Publication of TW328533B publication Critical patent/TW328533B/en

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
    • C01B33/18—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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
    • A61K8/25—Silicon; Compounds thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q11/00—Preparations for care of the teeth, of the oral cavity or of dentures; Dentifrices, e.g. toothpastes; Mouth rinses
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • 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
    • C01P2006/22—Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Birds (AREA)
  • Epidemiology (AREA)
  • Silicon Compounds (AREA)
  • Cosmetics (AREA)

Abstract

A process for the production of a precipitated silica which has a BET surface area of 10-130 m2/g, a CTAB surface area of 10-70 m2/g, an average particle diameter of 5-20 μm, a Cu abrasion value in a 10% glycerol dispersion of 4-50 mg and thickening behavior in a CMC solution (20% dispersion) of 300-3500 mPa.s, which is characterize in simultaneously adding alkali silicate (weight modulus SiO2:alkali oxide = 2.5-3.9:1) and a mineral acid to an initial amount of water which has been adjusted to a pH value of 7.0 to 9.9 or 10.0 to 10.7 by the addition of water glass, holding the pH value constant between 7.0 and 9.9 or 10.0 to 10.7 during addition, in which the initial precipitation temperature is 50-90℃ and an increase in viscosity occurs after at most 25% of the duration of precipitation, adjusting the pH value to ≰6, once a pH of 7.0 to 9.9 at the start of precipitation and a silica content of greater than 120 g/l or a pH of 10.0 to 10.7 at the start of precipitation and a silica content of greater than 150 g/l has been reached, separating the solid by filtration, washing, drying and grinding it to form a filtration cake or fluidized filtration cake.
TW083107689A 1993-08-07 1994-08-22 Process for the production of a precipitated silica TW328533B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4326576 1993-08-07
DE4423493A DE4423493A1 (en) 1993-08-07 1994-07-05 Process for the preparation of a precipitated silica

Publications (1)

Publication Number Publication Date
TW328533B true TW328533B (en) 1998-03-21

Family

ID=6494691

Family Applications (1)

Application Number Title Priority Date Filing Date
TW083107689A TW328533B (en) 1993-08-07 1994-08-22 Process for the production of a precipitated silica

Country Status (4)

Country Link
KR (1) KR970005188B1 (en)
DE (1) DE4423493A1 (en)
TW (1) TW328533B (en)
ZA (1) ZA945890B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19642448A1 (en) * 1996-03-27 1997-10-02 Degussa Precipitated silica
EP0798266B2 (en) * 1996-03-27 2002-01-02 Degussa AG Precipitated silica
DE19740440A1 (en) * 1997-09-15 1999-03-18 Degussa Easily dispersible precipitated silica
DE19840153A1 (en) * 1998-09-03 2000-04-20 Degussa Precipitated silica

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL289590A (en) * 1962-03-02
FR2622439B1 (en) * 1987-11-04 1991-07-12 Rhone Poulenc Chimie SILICA FOR TOOTHPASTE COMPOSITIONS COMPATIBLE IN PARTICULAR WITH CHLORHEXIDINE

Also Published As

Publication number Publication date
KR950005745A (en) 1995-03-20
DE4423493A1 (en) 1995-02-09
ZA945890B (en) 1995-03-16
KR970005188B1 (en) 1997-04-14

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