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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:"I knew," Cairness said, turning to Landor after a very short silence, "that you and Mrs. Landor were somewhere along here. So I left my horse at a rancheria across the hill there," he nodded over his shoulder in the direction of the looming pile just behind, "and walked to where I saw the fire. I saw you for some time before I was near, but I ought to have called out. I really didn't think about startling you."
  • 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:[Pg 239]

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

THREE:The Reverend Taylor stood there with his son in his arms. The mocking-bird trilled out a laugh to the evening air. It was irresistible, so droll that even a bird must know it,—the likeness between the little father and the little son. There was the same big head and the big ears and the big eyes and the body[Pg 247] that was too small for them all, a little, thin body, active and quivering with energy. There were the very same wrinkles about the baby's lids, crinkles of good humor and kindly tolerance, and the very same tufts of hair running the wrong way and sticking out at the temples.
  • 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:[Pg 276]

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