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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:Evidently he had pleased the multitude, for there was now a thick crowd in the central space, and already dancing had begun. Farm-hands in clean smocks, with bright-coloured handkerchiefs round their necks, gambolled uncouthly with farm-girls in spotted and striped muslins. Young farmers' wives, stiff with the sedateness of their bridehead, were drawn into reluctant capers. Despairing virgins renewed their hope, and tried wives their liveliness in unaccustomed arms. Even the elders danced, stumping together on the outskirts of the whirl as long as their breath allowed them."Yours!"
  • 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:Skipwith bowed.To-day business was bad. Here and there a ploughboy pulled up his slop and fumbled for pennies in his corduroys, but for the most part the stalls were deserted, even in certain cases by their holders. This was not because the Fair was empty. On the contrary, it was much more crowded than usual; but the crowd clotted into groups, all discussing the same thingthe Inclosure.

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

THREE:Her eyes were fixed on him with their strange spell, and her sharp little face was grave. He knew that she did not sympathisehe had not expected it. But he was glad he had told her.
  • 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:Rose burst into tears, and young David, interrupted[Pg 276] in the midst of an excellent meal, sent up a piercing wail.She was glad in a way that everything was so different, glad that Reuben's love-making was so utterly unlike Harry's. Otherwise she could never have plunged herself so deep into forgetfulness. She was quite without regretsshe could never have imagined she could be so free of them. She lived for the present, and for the future which was not her own. She was at rest. No longer the pursuing feet came after her, making her life a nightmare of long flightsshe was safe in her captor's grasp, borne homeward on his shoulder.

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