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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:In the ward we had just passed through there were none but convalescents or favourable cases. At the further end of the room a boy, fearfully emaciated, so thin that his body, lying in the hollow of the mattress, was hardly visible under the covering, was asleep as we approached. He had come from one of the famine districts, and in escaping from one scourge had come to where the other had clutched him. The doctor touched him on the[Pg 34] shoulder, and he opened his great splendid eyes. The awakening brought him gladness, or perhaps it was the end of his dream, for he had the happy look of a contented child, shook his shaven head waggishly, and the single corkscrew lock at the top, and was asleep again instantly.
  • 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:All about the town of pink plaster, in the dust of the roads and fields, are an endless number of dead templestemples of every size and of every period; and all deserted, all empty; even those that are uninjured look like ruins.

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

THREE:The highest peak of the chain that overlooks Bunnoo looks like the ruins of a fortress. A legend, which must have had its origin at some time when a man-eating tiger lurked in the neighbourhood, relates that it is the lair of a ferocious ogre always on the look-out for prey. Nothing on earth would induce any of the natives to go up the mountain; nay, for a long distance even the plain is not too safe.DARJEELING
  • 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 as the priests knew that the beast would need no help they again left me to myself. Up came the elephant at a brisk trot, flourishing his trunk and hooting; within two yards of me he stopped and stood still. He accepted a four-anna piece that I offered him, and handed it up for his driver, but finding no one on his back he put the coin back into my pocket, and sniffing all over my coat found a biscuit, ate it, and then quietly went back to his stable.The road lay among flowers, all-pervading; in the fields, on the rocks, on the road itself, pink flowers or lavender or white; bright moss, shrubs and trees in full bloom, and hovering over them birds of changing hue and golden butterflies.

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