Classifications

• • 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
  • B01D69/10—Supported membranes; Membrane supports
  • B01D69/106—Membranes in the pores of a support, e.g. polymerized in the pores or voids
• • 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
  • B01D69/12—Composite membranes; Ultra-thin membranes
  • B01D69/125—In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction
• • 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

Definitions

• the process may be continuous.
• the substituents on the photolabile onium are each independently hydroxyalkyl, phenyl or alkyl groups or are heterocyclic saturated moieties which include the onium in the ring.
• the photolabile onium group is bonded to the -(-CH2-)- moiety of a benzyl group and is a dialkyl sulfonium, trialkyl phosphonium or trialkyl ammonium moiety wherein each alkyl has from about 1 to about 16 carbon atoms or is a sulfonium, alkyl phosphonium or alkyl ammonium where two of the valences are part of a five- or six-member ring including the onium.
• Rp may be an alkyl which is not fully fluorinated, but no more than one atom of hydrogen or chlorine should be present in place of fluorine for each carbon atom.
• R ⁇ is a group which includes a carbon-carbon single bond formed during vinyl addition polymerization of the polymer and Y is a chemical bond or a noninterfering, bivalent moiety.
• ArC is a chromophore
• Z is a linking group
• Q ® a photolabile onium as defined hereinbefore.
• R ⁇ is the residue of an ethylenically unsaturated monomer, more preferably fCH 2 -CH ⁇ or
• u is independently at each occurrence an integer from 1 to 20 and v is an integer from 1 to 12, but preferably 1.
• Illustrative examples of B include
• G is an organic noninterfering group, such as
• the first and second compounds can be prepared in situ from polymerizable moieties bearing at least one nucleophilic or onium group.
• polymerizable moieties bearing at least one nucleophilic or onium group For example, vinylbenzyl chloride, hydroxyethylmethacrylate and methacrylic acid can be copolymerized using a free radical initiator.
• the film was loosened from the edge of the dish.
• the volume of the solution below the film was increased four times by the addition of water through a syringe.
• the submerged support was drawn up through the film to laminate the film on to the support which was then placed for one hour in an oven pre-heated to 90°C.
• a 1.5 inch in diameter disk was cut out of the support. This disk was placed in a solution of 1:1 weight: eight isopropanol and water to rewet the polysulfone support. The disk was then immersed in deionized water for a few minutes and then assembled into a reverse osmosis test cell and tested sequentially with the following feed solutions: 2000 ppm NaCl in deionized water at 250 psi; 2000 ppm MgS04 in deionized water at 250 psi; 6 percent corn syrup in deionized water containing 50 ppm Thimerosal antimicrobial. Feed was circulated at a rate of 100 cm3/min.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Separation Using Semi-Permeable Membranes (AREA)
• Manufacture Of Macromolecular Shaped Articles (AREA)

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Publications (1)

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Family Cites Families (3)

• 1994
  • 1994-08-22 WO PCT/US1994/009432 patent/WO1995005890A1/en not_active Application Discontinuation
  • 1994-08-22 CA CA002169555A patent/CA2169555A1/en not_active Abandoned
  • 1994-08-22 EP EP94926547A patent/EP0715540A1/en not_active Withdrawn
  • 1994-08-22 JP JP7507699A patent/JPH09501609A/ja active Pending
  • 1994-08-22 KR KR1019960700884A patent/KR960703659A/ko not_active Application Discontinuation
  • 1994-08-22 AU AU76353/94A patent/AU675877B2/en not_active Ceased

Non-Patent Citations (1)

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