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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:He looked about now for a sign of either party. Across the creek was some one riding slowly along the crest of a hill, seeming so small and creeping that only a very trained eye could have made it out. It was probably a hound. The hares lay low, in ca?ons and gullies and brush, as a rule. As he scanned the rest of the valley, his horse stopped short, with its fore legs planted stiffly. He looked down and saw that he was at the brink of a sheer fall of twenty feet or more, like a hole scooped in the side of the little rise he was riding over. He remembered, then, that there was a cave somewhere about. He had often heard of it, and probably it was this. He dismounted, and, tying the pony in a clump of bushes, walked down and around to investigate.It occurred to Cairness that it was ungenerous of Landor to revenge himself by a shot from the safe intrenchment of his rank. "Mrs. Landor has had time to tell me nothing," he said, and turned on his spurred heel and went off in the direction of the post. But it was not a situation, after all, into which one could infuse much dignity. He was retreating, anyway it might be looked at, and there is bound to be more or less ignominy in the most creditable retreat.
  • 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:Cairness did remember, but he did not see fit to say so."No," he agreed, "it doesn't matter. And I shall do well enough." Then the three went out, and she finished her breakfast alone.

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

THREE:Landor's wrath was mighty, but he smiled as he sat balancing a ruler on his fingers and hearing how the citizens of San Tomaso, eager to avenge their wrongs, had met him at early morning, had gone bravely forward, keen on the scent, had implored him to hasten, while he halted on worthless pretexts, and had, towards evening, reluctantly left a hot trail, going from it at right angles, "and camping," said Brewster, regretfully, "as far away as it was possible to get, considering the halts."
  • 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:

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