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Membrane separation type solvent dehydration system

Great attention is recently being paid to global environmental issues, and it is now conceivable that companies will need to treat used solvents themselves. In consideration of this kind of social issue, we have developed a “membrane separation type solvent dehydration system,” which uses a polyimide membrane with superior dehydration properties developed by Ube Industries, Ltd. in combination with our own distillation and concentration technology that has resulted in solvents being more easily recovered.

THREE:Lise, or Lisette, as she was generally called, was a delicate child, and her parents, who were devotedly fond of her and very anxious about her, frequently came and took her home for a few days, greatly to her delight. With them and her brother Louis, their only child besides herself, she was perfectly happy. Louis was three years younger, and did not possess her genius for painting, but the brother and sister were always deeply attached to one another.
  • 1Under the distillation system, even in case of azeotropic solvent compositions, this system which remove water vapor by the polyimide membrane will easily dehydrate.
  • 2In comparison with the distillation system, it significantly saves on use of steam.
  • 3Dehydration can be performed through merely supplying evaporated vapor to the membrane module and maintaining the differential pressure between the permeable side and the impermeable side.
  • 4Solvent purity of 99.9% or more can be achieved by carrying out dehydration with a polyimide membrane only.
  • 5The polyimide membrane has superior heat and solvent resistance. Therefore, the vapor permeation system reduces contamination of the membrane and thus extends its life.
THREE:Les bonnes m?urs et labondance.

The aromatic polyimide membrane is highly permeable to water vapor but less permeable to vapors of organic compounds such as alcohol etc.

THREE:
  • 1 Recovery of the detergent solvent Recovery of the cleaning solvent such as electronic parts industry, precision instrument industry.
  • 2Solvent recovery and the refinement Solvent recovery and the refinement such as chemical industry, an industry of medical supplies, food industry, the fermentation industry.
THREE:Society was much larger here than at St. Petersburg, where it seemed almost to form one family, every one being related to each other.The brothers went out shooting; there were visits, dances, village ftes; they dressed up, wrote verses, acted plays, and went to see the Rosire, an institution which, in this century, would be an impossibility, and which even then many people were beginning to find silly and useless, as may be shown by the remarks of a M. de Matigny, a magistrate and bailli, who was staying in the house for some theatricals, and whom they tried to persuade to stop another day.

Acetone, ethanol, methyl ethyl ketone, butanol, isopropyl alcohol, ethyl acetate, methyl isobutyl ketone, others (including hexane and toluene).