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TWO:CHAPTER IV.

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:Newton then pushed forward to open the conference, and said, as he joined the smithFor once that Realf managed to land a blow, Reuben landed a couple, and with twice as much weight behind them. The younger man soon began to look green and sick, he staggered about, and flipped, while the sweat poured off his forehead into his eyes. Reuben breathed stertorously and could scarcely see out of his left eye, but was otherwise game. Pete felt prouder of him than ever.
  • 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:"Same as a parson?" enquired Pete anxiously.

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

THREE:"And your damned son!" furiously cried Ditch of Totease.
  • 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:But Reuben did not care. He had won his heart's desire, and public opinion could go where everything else he was supposed to value, and didn't, had gone. In a way he was sorry, for he would have liked to discuss his triumph at the Cocks, seasoning it with pints of decadent ale. As things were, he had no one to talk it over with but the farm-men, who grumbled because it meant more workMaude, who said she'd be sorry when all that pretty gorse was cleared awayand old mad Harry, now something very like a grasshopper, whose conversation since the blaze at Grandturzel had[Pg 456] been limited entirely to the statement that "the house was afire, and the children were burning."

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