GB756875A - Improvements in or relating to the production of finely divided silica - Google Patents

Improvements in or relating to the production of finely divided silica

Info

Publication number
GB756875A
GB756875A GB3184053A GB3184053A GB756875A GB 756875 A GB756875 A GB 756875A GB 3184053 A GB3184053 A GB 3184053A GB 3184053 A GB3184053 A GB 3184053A GB 756875 A GB756875 A GB 756875A
Authority
GB
United Kingdom
Prior art keywords
silicate
calcium
calcium silicate
finely divided
prepared
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
GB3184053A
Inventor
Edward Merle Allen
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.)
Columbia Southern Chemical Corp
Original Assignee
Columbia Southern Chemical Corp
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 Columbia Southern Chemical Corp filed Critical Columbia Southern Chemical Corp
Priority to GB3184053A priority Critical patent/GB756875A/en
Publication of GB756875A publication Critical patent/GB756875A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • 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
    • 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
    • C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
    • 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
    • C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Nanotechnology (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Composite Materials (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Silicon Compounds (AREA)

Abstract

Finely divided silica is prepared by reacting a finely divided alkaline earth metal silicate, for example calcium silicate of an average particle size of below 0.1 micron with an aqueous solution of ammonium chloride which may also contain, ammonia, and/or sodium chloride using calcium silicate. Sufficient ammonium chloride to decompose all the calcium silicate is preferably employed. From 5 to 50 gm./l of free ammonia and from 25 to 100 gm./l of sodium chloride may be employed. Reaction may be effected by adding an aqueous solution of ammonium chloride to an aqueous slurry of calcium silicate with agitation and heating to drive off free ammonia. The slurry after removal of ammonia may be treated with an acid, such as hydrochloric, nitric or acetic acid, which forms a water soluble compound with calcium. The calcium silicate may be prepared by various methods and natural products such as wollastonite may also be employed. Finely divided calcium silicate of the required particle size may be prepared by mixing aqueous solutions of an alkali metal silicate, for example sodium silicate, and calcium chloride under conditions of high turbulence, for example by introducing the two streams closely together into the central area of a centrifugal pump, and in such proportions that an excess of calcium chloride is established. The calcium silicate is preferably prepared in a concentration of 5 to 150 gm./l. The alkali metal silicate preferably has the formula M2O(SiO2)x, where x is between 2 and 4.ALSO:Finely divided silica prepared by reacting an alkaline earth metal silicate, e.g. calcium silicate, of an average ultimate particle size of below 0,1 micron with an aqueous solution of ammonium chloride may be employed as a diluent for benzene hexachloride, D.D.T., chlordane and 2, 4-D.
GB3184053A 1953-06-05 1953-06-05 Improvements in or relating to the production of finely divided silica Expired GB756875A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3184053A GB756875A (en) 1953-06-05 1953-06-05 Improvements in or relating to the production of finely divided silica

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3184053A GB756875A (en) 1953-06-05 1953-06-05 Improvements in or relating to the production of finely divided silica

Publications (1)

Publication Number Publication Date
GB756875A true GB756875A (en) 1956-09-12

Family

ID=10329178

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3184053A Expired GB756875A (en) 1953-06-05 1953-06-05 Improvements in or relating to the production of finely divided silica

Country Status (1)

Country Link
GB (1) GB756875A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1222781B (en) * 1959-03-16 1966-08-11 Gessner & Co G M B H Quartz-filled paper
CN102351216A (en) * 2011-07-12 2012-02-15 湖南恒光科技股份有限公司 Preparation process for soda ash capable of combined production of white carbon black

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1222781B (en) * 1959-03-16 1966-08-11 Gessner & Co G M B H Quartz-filled paper
CN102351216A (en) * 2011-07-12 2012-02-15 湖南恒光科技股份有限公司 Preparation process for soda ash capable of combined production of white carbon black

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