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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:
  • 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 journey was insupportable. In the diligence with them was a dirty, evil-looking man, who openly confessed that he was a robber, boasting of the watches, &c., that he had stolen, and speaking of many persons he wished to murder la lanterne, amongst whom were a number of the acquaintances of Mme. Le Brun. The little girl, now five or six years old, was frightened out of her wits, and her mother took courage to ask the man not to talk about murders before the child.

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

THREE:Taking leave of her friends, who implored her not to leave them, she started for Brussels, accompanied by her niece Henriette and Pamela, who went part of the way with her. At Antwerp she met her son-in-law, M. de Lawoestine, who had been to visit her when she was living in Holstein. With her two sons-in-law she was always on the most friendly and affectionate terms.Lise, or Lisette, as she was generally called, was a delicate child, and her parents, who were devotedly fond of her and very anxious about her, frequently came and took her home for a few days, greatly to her delight. With them and her brother Louis, their only child besides herself, she was perfectly happy. Louis was three years younger, and did not possess her genius for painting, but the brother and sister were always deeply attached to one another.
  • 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:After the death of her eldest boy, the sight of this picture so affected the Queen that she had it removed, taking care to explain to Mme. Le Brun that this was done only because she could not bear to see it, as it so vividly recalled the child whose loss was at that time such a terrible grief to her.Only a few years since, the chronicler Barbier had remarked, It is very apparent that we make all Europe move to carry out our plans, and that we lay down the law everywhere. [2]

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