GB187728A - An improved process for the manufacture of semi-permeable separators such as diaphragms, diffusion walls and the like - Google Patents

An improved process for the manufacture of semi-permeable separators such as diaphragms, diffusion walls and the like

Info

Publication number
GB187728A
GB187728A GB20147/21A GB2014721A GB187728A GB 187728 A GB187728 A GB 187728A GB 20147/21 A GB20147/21 A GB 20147/21A GB 2014721 A GB2014721 A GB 2014721A GB 187728 A GB187728 A GB 187728A
Authority
GB
United Kingdom
Prior art keywords
mixture
parts
water
sulphuric acid
diaphragms
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
GB20147/21A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB20147/21A priority Critical patent/GB187728A/en
Publication of GB187728A publication Critical patent/GB187728A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0039—Inorganic membrane manufacture
    • B01D67/0044—Inorganic membrane manufacture by chemical reaction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/14—Dynamic membranes
    • B01D69/141—Heterogeneous membranes, e.g. containing dispersed material; Mixed matrix membranes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Cell Separators (AREA)

Abstract

Diaphragms are made by immersing a porous body in a solution containing a substance such as sodium silicate capable of forming a gelatinous medium and a coagulent therefor such as sulphuric or other acid, the mixture gelatinizing in the porous material after an appreciable lapse of time. The mixture is preferably prepared by pouring a solution consisting of one part 40 DEG B<\>ae. sodium silicate and two parts water in a thin stream and with rapid stirring into one part of 66 DEG B<\>ae. sulphuric acid diluted with two parts of water and cooled. The excess sulphuric acid and sodium sulphate may be removed or retained. When the diaphragm is removed from a liquid it may be treated with sulphuric acid or other hygroscopic substance. The porous body is preferably of material having a granular structure such as "filtros" or "alundum," but fibrous materials such as wood or asbestos may be used.ALSO:An impregnating-liquid is made by stirring a mixture of one part of sodium silicate solution of density 40 DEG B<\>ae. and two parts of water into a cooled mixture of one part of sulphuric acid of density 66 DEG B<\>ae. and two parts of water. The mixture gelatinizes after 20-30 minutes.
GB20147/21A 1921-07-27 1921-07-27 An improved process for the manufacture of semi-permeable separators such as diaphragms, diffusion walls and the like Expired GB187728A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB20147/21A GB187728A (en) 1921-07-27 1921-07-27 An improved process for the manufacture of semi-permeable separators such as diaphragms, diffusion walls and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20147/21A GB187728A (en) 1921-07-27 1921-07-27 An improved process for the manufacture of semi-permeable separators such as diaphragms, diffusion walls and the like

Publications (1)

Publication Number Publication Date
GB187728A true GB187728A (en) 1922-10-27

Family

ID=10141143

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20147/21A Expired GB187728A (en) 1921-07-27 1921-07-27 An improved process for the manufacture of semi-permeable separators such as diaphragms, diffusion walls and the like

Country Status (1)

Country Link
GB (1) GB187728A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2222138A1 (en) * 1973-03-21 1974-10-18 Ppg Industries Inc

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2222138A1 (en) * 1973-03-21 1974-10-18 Ppg Industries Inc

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