ここから本文です
TWO:

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:CHAPTER V
  • 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 spite of his agitation, it occurred to him[Pg 140] that he must be prepared for worse shocks than this. It was no use giving way to panic. Incredible as had been the cricketing performance, the magical flight, and now this ridiculously sudden growth of beard, there were indications about the Clockwork man that pointed to still further abnormalities. The Doctor braced himself up to face the worst; he had no theory at all with which to explain these staggering manifestations, and it seemed more than likely that the ghastly serio-comic figure seated on the couch would presently offer some explanation of his own.

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:"Hi! that ought to cook his dough!--with her face--and her voice!"What? You gave the new wing. Well, to think of your having kept me in the dark all this time! I do call that very generous, but generous you always are, as Ive often told Mamma, about your money. I suppose that will cost a great deal of money.

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