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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:All the sick were sudras, Hindoos of the lowest caste. All the rest, Brahmins, Kshatriyas, Vaisiyas, would rather die at home, uncared for, than endure the promiscuous mixture of caste at the hospital, and contact with their inferiors. Even the sudras are but few. There is an all-pervading dread of a hospital, fostered by Indian bone-setters and sorcerers, stronger even than the fear of the pestilence; the people hide themselves to die, like[Pg 33] wounded animals, and their relations will not speak of an illness for fear of seeing anybody belonging to them taken to the hospital.
  • 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:In the harbour, where there was a light breeze blowing, the little outrigged canoes had hoisted large sails, white edged with black, and vanished into the distance, skimming like winged things over the intensely blue water.

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

THREE:Along the roads of beaten earth, between tall plastered houses, a tramway runs. In the shopfronts the motley display suggests a curiosity shop, and the goods have a look of antiquity under the thick layer of dust that lies on everything. It is[Pg 5] only in the heart of the city, in the "Fort," that the shops and houses have a European stamp.
  • 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:Near her was another woman, gone mad, dancing, her skeleton limbs contorted in a caricature of[Pg 193] grace; and a child of some few months, like an undeveloped abortion, of the colour of a new penny, with a large head rolling on a neck reduced to the thickness of the vertebr?, and arms and legs no larger than knitting-pins, but, in a sort of mockery, the swollen belly of the fever-stricken. The eyes blinked in the little wrinkled face, seeking something in vacancy; it tried to cry, but the only sound was a feeble croak.Near a small station oxen were filing slowly past. On their heads were hoops hung with bells, and little ornaments at the tips of their horns dangled with quick flashes of light.

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