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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:
  • 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:Tazulmulook arrives in the same town, and is on the point of ringing at Dilbar's door when he is hindered by his father's vizier, who tells him how many times this dangerous woman has been the ruin of kings' sons. But Tazulmulook, in a discourse on valour addressed to the audience, who stamped applause, rejects the counsels of prudence and rings at the dancer's door. Tazulmulook wins the game with Dilbar, and compels her to release his brothers, but only after branding each on the back of his neck.In the sacred tank, where Vishnu bathes when[Pg 165] he comes on earth, an old woman was standing pouring the stagnant green water over her body, while others of the faithful, seated on the steps, were piously drinking the stuff from a coco-nut that they handed round. In one corner of this pool was an exquisite bower of floating wreathsyellow, white, and violeta splash of bright colour on the squalid water.

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:At Jan the pagodas are of red stone. The largest, conical in shape, covers with its ponderous roof, overloaded with sculptured figures of gods and animals, a very small passage, at the end of which two lights burning hardly reveal a white idol standing amid a perfect carpet of flowers. Round the sacred tank that lies at the base of the[Pg 45] temple, full of stagnant greenish-white water, are flights of steps in purple-hued stone; at the angles, twelve little conical kiosks, also of red stone and highly decorated, shelter twelve similar idols, but black. And between the temples, among the few huts that compose the village of Jan, stand Moslem mausoleums and tombs. Verses from the Koran are carved on the stones, now scarcelyl visible amid the spreading briars and garlands of creepers hanging from the tall trees that are pushing their roots between the flagstones that cover the dead.

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