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TWO:BHAWNAGAR

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:Close to a temple, of which the cornice is decorated with female figures holding musical instruments, on a sort of terrace a party of youths were making a distracting din with brass instruments, acutely shrill, and, of course, tom-toms. Two very small temples covered with brass that shines like gold stand in the bazaar to mark the beginning and end of the coppersmiths' quarter, where every stall rings with the tinkle of the little hammers tapping the metal that is beaten into trays and pots and a thousand vessels for the worship of the gods and for domestic purposes. Workmen aged four, the great-grand-sons of the master-smith, were already trying their 'prentice hand, chiselling the hard metal with a free touch, and ornamenting cups and bowls of traditional shape. And this is the only part of the calm and lazy city, living on its temples and its sacred river,[Pg 161] where the visitor feels himself a "tourist." Here the shops for the special craft of Benares are furnished with the unwonted luxury of chairs, and some display of signs and wares is made. Further on is a large open place full of piles of flowers, garlands of jasmine and marigold, and heaps of rose petals to be strewn on the 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:The dinner-table was covered with flowersMarchal Niel and Gloire de Dijon rosesbut enormous, as big as saucers, and of such a texture, such a colour! a tissue of frost and light; and round the table, which was loaded with silver plate, were grey and red uniforms. Strains of music were wafted in through the open windows from the regimental band playing slow waltz-tunes a little way off.Servants carrying large trays offer the company certain strange little green parcels: a betel-leaf screwed into a cone and fastened with a clove, containing a mixture of spices and lime, to be chewed after dinner to digest the mass of food you may see spread out in the tables in the dining-room.

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