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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:The General looked at me between puffs of his cigar. "I hear you've ridden over fifty miles to-day."He made no rejoinder except that his eyes were insistent. She wiped his temples. "I hate to refuse you."
  • 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:"Yes," exclaimed Camille as the three candle-bearers gathered close, "that's your mother's writing," and as we fell into marching order again, with the lights still in the front files, I opened it. It was thick and soft with sheet after sheet of thinnest paper. With these was a sealed letter, unaddressed, containing in one corner what seemed to be a ring. Around all was a sheet of writing of later date than any other. Wonderful, my mother's lines declared, was the Providence that had brought her wounded boy among such priceless friends; and wonderful that same Providence that now gave her the chance to send three weeks' daily letters in one, and to send them by a hand so sure that she ventured to add this other note, a matter so secret that it must be delivered only by my own hands, or hands which I could trust as my own, to Charlotte Oliver. We glanced back in search of Charlotte. She and Ferry were well in the rear of the procession, moving with laggard steps, she lighting his page with a borrowed candle, and he evidently reading not his orders, but the Federal surgeon's letter. "Oh, don't speak yet," murmured Camille, "let them alone!"

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

THREE: We have the pleasure of introducing to you Mr. Frank Bassett, the bearer of this letter, whose signature you will find in the margin. We beg you to honor his drafts to the amount of two hundred pounds sterling, upon our London house, all deductions and commissions being at his expense.She read on aloud how two private Federal soldiers, hospital convalescents, had come to my mother telling her of his death, and how he had named my mother over and over in his delirium, desiring that she should be given charge of the small effects on his person and that she would return them to his father in the Confederacy. My mother wrote how she had been obliged secretly to buy back from the hospital steward a carte-de-visite photograph of Charlotte, and this ring; how, Oliver not being a Federal soldier, she had been allowed to assume the expense and task of his burial; how she had found the body already wrapped and bound, in the military way, when she first saw it, but heard the two convalescents praising to each other the strong, hard-used beauty of the hidden face, and was shown the suit of brown plantation jeans we all knew so well; and how, lastly, when her overbearing conscience compelled her to tell them she might find it easier to send the relics to the wife rather than the father, they had furtively advised her to do as she pleased.
  • 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:"Yes, that is, I knew FrankI mean Mr. Bassettthat is, I knew you were all three going away, and I thought I might come down and see you start."

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