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TWO:It was plainly the cave. He went and stood in the mouth and looked into the dark, narrowing throat. A[Pg 219] weird silence poured up with the damp, earthy smell. He went farther in, half sliding down the steep bank of soft, powdery, white earth. There was only the uncanny light which comes from reflection from the ground upward. But by it he could see innumerable tiny footprints, coyote, squirrel, prairie-dog, polecat tracks and the like. It took very little imagination to see yellow teeth and eyes gleaming from black shadows also, although he knew there were no dangerous animals in those parts.

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:It made it none the better that only Landor had the right to give her the strength of his arm, and that only Cairness had the right to the desperate, imploring look she threw him. It was a swift glance of a moment, and then she reached out a steady enough hand for the parasol, and smiled. It had been much too tragic to last—and in those surroundings. It was a flash of the naked swords of pain, and then they were sheathed. But each had left a sharp gash. No one had seen it. Perhaps to many there would have been nothing to see."They put him in a tent beside the hospital, and the next morning I went over with the doctor to see him. He was all cut up on the arms and neck and shoulders. I must have been very strong." She stopped, and he still sat with the puzzled look on his face, but a light of understanding beginning to show through.
  • 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:Chapter 25

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:And then his thoughts shot back to the present with quick pain. She should not have come here, not so soon. He had taken a long, hard trip that had nearly ended in his death, to avoid this very thing, this [Pg 293]meeting, which, just because it made him so terribly happy, seemed a treachery, a sacrilege. Had she less delicacy of feeling than himself? Or had she more love? It was that, he saw it in her beautiful eyes which were growing wide and frightened at his silence. He took his hand from under the sheets and stretched it out to her. She went to him and dropped on her knees beside the bed, and threw her arms about him. He moved his weak head closer to her shoulder, and pressing her fingers to his face gave a choking sob. He was happy, so very happy. And nothing mattered but just this.

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