GB992324A - Improvements in or relating to filter materials - Google Patents

Improvements in or relating to filter materials

Info

Publication number
GB992324A
GB992324A GB1105462A GB1105462A GB992324A GB 992324 A GB992324 A GB 992324A GB 1105462 A GB1105462 A GB 1105462A GB 1105462 A GB1105462 A GB 1105462A GB 992324 A GB992324 A GB 992324A
Authority
GB
United Kingdom
Prior art keywords
fibres
filter material
orthophosphate
dispersion
polyphosphate
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
GB1105462A
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.)
Compagnie de Saint Gobain SA
Original Assignee
Compagnie de Saint Gobain SA
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 FR856687A external-priority patent/FR1292382A/en
Application filed by Compagnie de Saint Gobain SA filed Critical Compagnie de Saint Gobain SA
Publication of GB992324A publication Critical patent/GB992324A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2003—Glass or glassy material
    • B01D39/2017—Glass or glassy material the material being filamentary or fibrous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/18—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being cellulose or derivatives thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2068—Other inorganic materials, e.g. ceramics
    • B01D39/2082—Other inorganic materials, e.g. ceramics the material being filamentary or fibrous

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
  • Filtering Materials (AREA)
  • Coloring Foods And Improving Nutritive Qualities (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

A non-inflammable filter material comprises mineral fibres, e.g. glass and asbestos, and potassium polyphosphate. The material may also contain cellulose fibres, a flexible and non-inflammable resin, e.g. a fireproofed polyvinyl acetate, and a filter, e.g. calcium indicator. Methods disclosed for making the material are: (1) preformed filter material comprising mineral fibres is impregnated with a dispersion of potassium polyphosphate in a dilute solution of calcium chloride, which has preferably been allowed to age; (2) preformed filter material comprising mineral fibres is impregnated with an aqueous solution of monopotassium orthophosphate, dried and heated to a temperature at which the orthophosphate is converted to polyphosphate; (3) potassium polyphosphate is introduced into an aqueous suspension of the fibres, from which suspension a filter material in sheet form is made by paper-making methods; the potassium polyphosphate may be in the form of a dispersion in a dilute solution of calcium chloride, and the fibrous supension may include an alkali metal indicate; and (4) monopotassium orthophosphate is introduced into an aqueous suspension of the fibres, a filter material in sheet form is produced from the suspension by paper-making methods, and the orthophosphate converted to polyphosphate by heat; the monopotassium orthophosphate may be in the form of an aqueous solution to which an alkali metal silicate has been added and in which fibres of cellulose are dispersed, this dispersion being added to the aqueous dispersion of mineral fibres, after which an aqueous solution of calcium chloride is added to precipitate calcium silicate.
GB1105462A 1961-03-22 1962-03-22 Improvements in or relating to filter materials Expired GB992324A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR856433A FR1292325A (en) 1961-03-22 1961-03-22 Improvement in the manufacture of non-flammable filtering materials and materials obtained by this process
FR856687A FR1292382A (en) 1961-03-24 1961-03-24 Improvement in the manufacture of non-flammable filter materials for the filtration of gases at high temperature

Publications (1)

Publication Number Publication Date
GB992324A true GB992324A (en) 1965-05-19

Family

ID=26189797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1105462A Expired GB992324A (en) 1961-03-22 1962-03-22 Improvements in or relating to filter materials

Country Status (4)

Country Link
CH (1) CH409872A (en)
DE (1) DE1469169A1 (en)
FR (1) FR1292325A (en)
GB (1) GB992324A (en)

Also Published As

Publication number Publication date
FR1292325A (en) 1962-05-04
CH409872A (en) 1966-03-31
DE1469169A1 (en) 1969-02-06

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