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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:In 1768, a year after the birth of her youngest girl, she had another boy, and at the same time was dangerously ill of small-pox. The Duke, in terror for her life, would not allow her to be told what was [183] the matter, and even insisted on the children all being admitted to her room, for fear of arousing her suspicions and alarming her. However, she recovered and none of them took it. The baby lived and for some time appeared quite well; though after a few months it began to fade, and soon died of consumption.
  • 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:

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

THREE:There Pauline had a son, and to her great joy he and the children she afterwards had lived to grow up. The farm Mme. de Tess wished for was called Wittmold, and lay at the other side of the lake upon a plain covered with pasture and ponds, as far as the eye could reach. The house stood on a promontory jutting out into the lake, and was surrounded by fields, apple trees, and pine woods. They crossed the lake in boats, and established themselves there. They could live almost entirely upon the produce of the place, for there was plenty of game, plenty of fish in the lake: the dairy farm paid extremely well, the pasture produced rich, delicious milk; they had a hundred and twenty cows, and made enormous quantities of butter, which they sold at Hamburg. It was pleasant enough in the summer, but in winter the lake was frozen, the roads covered with snow, and the cold wind from the Baltic raved round the house. However, they were thankful for the shelter of a home that most of their friends would have envied, and they lived peacefully there for four years, during which Pauline organised and carried on a great work of charity which, with the assistance of one or two influential friends, soon spread all over Europe. It was a kind of society with branches in different countries, to collect subscriptions for the relief of the French exiles, and it involved an enormous amount of letter-writing, for, if the subscriptions poured into Wittmold, so did letters of entreaty, appealing for help. But Pauline was indefatigable not only in allotting the different sums of money, [255] but in finding employment, placing young girls as governesses, selling drawings and needlework, &c.
  • 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:I hope so, Madame. In my hat are 100,000 livres de rente, a Marquisate, and a dowry, besides my heart and my hand. Thus I put myself into a lottery: here is a heap of tickets of which only one is black, the winning one. So let all the young ladies who wish to marry come and choose one.

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