GB800694A - Improvements in or relating to silicas - Google Patents

Improvements in or relating to silicas

Info

Publication number
GB800694A
GB800694A GB23150/55A GB2315055A GB800694A GB 800694 A GB800694 A GB 800694A GB 23150/55 A GB23150/55 A GB 23150/55A GB 2315055 A GB2315055 A GB 2315055A GB 800694 A GB800694 A GB 800694A
Authority
GB
United Kingdom
Prior art keywords
solution
acid
silicate
sprayed
atmosphere
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
GB23150/55A
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
Publication of GB800694A publication Critical patent/GB800694A/en
Expired legal-status Critical Current

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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Silicon Compounds (AREA)

Abstract

<PICT:0800694/III/1> Finely divided silica is produced by treating the surface of an aqueous solution of an alkali metal silicate with an acid-reacting substance and drawing the treated surface into the body of the solution, and dispersing it therein, by means of a rotary stirrer 3 having arcuate blades 9, a fresh surface thereby being formed for treatment. The reaction vessel may be provided with baffles 5. The atmosphere above the silicate solution may be sprayed with a solution of the acid from a pipe 11 and the spray may strike the surface of the solution. A conventional lawn soaker spray may be employed. When using a solution of an acid gas or a readily volatile liquid acid, the solution may be sprayed at an elevated temperature, e.g. above 50 DEG C., so as to saturate the atmosphere with the acid. An acid gas may also be supplied as such to the atmosphere. Acidreacting substances specified are hydrochloric, sulphuric, nitric, sulphurous, phosphoric, hydrobromic and carbonic acid, aluminium chloride and sulphate, and ammonium chloride. Sodium silicate of the formula Na2O(SiO2)x, where x is 2-4 is preferably employed, but sodium monosilicate and potassium silicates may also be employed. The silicate solution may contain sodium chloride or sulphate and the aqueous acid calcium or aluminium chloride. One half of the silicate may be neutralized over a period of 100 minutes. Thereafter neutralization may be effected at a more rapid rate and by the use of other methods. In the example a sodium silicate solution at a temperature of 149-152 DEG F. was stirred by means of a turbo agitator rotating at 70 r.p.m. and was sprayed with 12.2 N hydrochloric acid at a temperature of 25 DEG C. for a period of 329 minutes, after which time the resulting slurry had a pH of 7. The slurry was then boiled for 1 hour giving a pH of 8.5, allowed to cool and further hydrochloric acid added, giving a pH of 8.2. After decanting the mother liquor, the silica was treated with 0.225 per cent of a mixture of dimethyl dialkyl ammonium chlorides in aqueous solution, and the mother liquor again decanted. The silica after drying has a surface area of 121 sq.m/gm. Specification 745,822 is referred
GB23150/55A 1954-11-05 1955-08-11 Improvements in or relating to silicas Expired GB800694A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US332800XA 1954-11-05 1954-11-05

Publications (1)

Publication Number Publication Date
GB800694A true GB800694A (en) 1958-09-03

Family

ID=21869508

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23150/55A Expired GB800694A (en) 1954-11-05 1955-08-11 Improvements in or relating to silicas

Country Status (4)

Country Link
CH (1) CH332800A (en)
DE (1) DE1125891B (en)
FR (1) FR1134178A (en)
GB (1) GB800694A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2222823A (en) * 1987-05-25 1990-03-21 Kawatetsu Mining A process for producing high purity silica
WO2004047723A2 (en) * 2002-11-25 2004-06-10 Dutov, Ivan Nikolaevich Method for producing fine highly porous silicium dioxide
EP2892849A4 (en) * 2012-09-07 2016-04-20 Paben Proyectos Estrategicos S A De C V Silica-based structurants and processes for making thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0784594A1 (en) * 1994-10-03 1997-07-23 Societe Chimique Prayon-Rupel Method for making phosphated alkaline salts, resulting salts and silicas, and detergent or foodstuff containing such salts

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496736A (en) * 1942-10-10 1950-02-07 William T Maloney Manufacture of precipitated silica
GB710015A (en) * 1950-12-02 1954-06-02 Degussa An improved process for the production of finely divided silica

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2222823A (en) * 1987-05-25 1990-03-21 Kawatetsu Mining A process for producing high purity silica
GB2222823B (en) * 1987-05-25 1992-04-08 Kawatetsu Mining A process for producing high purity silica
WO2004047723A2 (en) * 2002-11-25 2004-06-10 Dutov, Ivan Nikolaevich Method for producing fine highly porous silicium dioxide
WO2004047723A3 (en) * 2002-11-25 2004-08-26 Dutov Ivan Nikolaevich Method for producing fine highly porous silicium dioxide
EP2892849A4 (en) * 2012-09-07 2016-04-20 Paben Proyectos Estrategicos S A De C V Silica-based structurants and processes for making thereof
US9738856B2 (en) 2012-09-07 2017-08-22 Paben Proyectos Estrategicos, S.A. De C.V. Silica-based structurants and processes for making thereof

Also Published As

Publication number Publication date
CH332800A (en) 1958-09-30
FR1134178A (en) 1957-04-08
DE1125891B (en) 1962-03-22

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