GB877890A - Improvements in the preparation of silica flour - Google Patents

Improvements in the preparation of silica flour

Info

Publication number
GB877890A
GB877890A GB2858558A GB2858558A GB877890A GB 877890 A GB877890 A GB 877890A GB 2858558 A GB2858558 A GB 2858558A GB 2858558 A GB2858558 A GB 2858558A GB 877890 A GB877890 A GB 877890A
Authority
GB
United Kingdom
Prior art keywords
silica
mineral
silica flour
grinding
carbonate
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
GB2858558A
Inventor
Herbert Daymond Segrove
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.)
British Industrial Sand Ltd
Original Assignee
British Industrial Sand Ltd
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 British Industrial Sand Ltd filed Critical British Industrial Sand Ltd
Priority to GB2858558A priority Critical patent/GB877890A/en
Priority to BE582343A priority patent/BE582343A/en
Priority to DEB54685A priority patent/DE1119836B/en
Publication of GB877890A publication Critical patent/GB877890A/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

Landscapes

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

Abstract

Silica flour having a whiteness rating of at least 90, as defined, is derived from a mineral silica which on washing and grinding to silica flour by known means has a whiteness rating of less than 85, by comminuting the mineral silica in the absence of surfaces, such as ferrous surfaces, which would provide coloured contaminants in the silica flour, to a size such that 100% will pass a 120 B.S. screen, and heating the comminuted mineral in the presence of 1 to 5% of an oxide, hydroxide, carbonate, or bicarbonate of an alkali or alkaline earth metal to between 1000 and 1700 DEG C. for 10 mins. to 1 hr. Heating may be effected before, or after grinding, and the added compound may be sodium, or potassium, carbonate, or lithium, barium, or calcium hydroxide. The mineral silica may be sand, or sandstone, and may be comminuted in a silica lined mill with silica pebbles. The added compound may be admixed as a solution, or as a finely divided solid.
GB2858558A 1958-09-05 1958-09-05 Improvements in the preparation of silica flour Expired GB877890A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB2858558A GB877890A (en) 1958-09-05 1958-09-05 Improvements in the preparation of silica flour
BE582343A BE582343A (en) 1958-09-05 1959-09-04 Improvements to the preparation of finely divided silica.
DEB54685A DE1119836B (en) 1958-09-05 1959-09-04 Process for cleaning finely divided mineral silicic acid

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2858558A GB877890A (en) 1958-09-05 1958-09-05 Improvements in the preparation of silica flour
GB3191558 1958-10-07

Publications (1)

Publication Number Publication Date
GB877890A true GB877890A (en) 1961-09-20

Family

ID=26259462

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2858558A Expired GB877890A (en) 1958-09-05 1958-09-05 Improvements in the preparation of silica flour

Country Status (3)

Country Link
BE (1) BE582343A (en)
DE (1) DE1119836B (en)
GB (1) GB877890A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3437501A (en) * 1965-03-18 1969-04-08 Eugen Schneider Process for the manufacture of white quartz powder

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113278202B (en) * 2021-07-13 2022-05-24 江西省矿产资源保障服务中心 Rubber reinforcing filler and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3437501A (en) * 1965-03-18 1969-04-08 Eugen Schneider Process for the manufacture of white quartz powder

Also Published As

Publication number Publication date
DE1119836B (en) 1961-12-21
BE582343A (en) 1960-12-31

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