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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:One day Reuben was so tired that he fell asleep over his supper. His mother cleared the table round him, glancing at him with fond, submissive eyes. Each day she had come to love him more, with an obedient love, almost instinctive and elemental, which she had never felt for the gentle husband or considerate son. This evening she laid her shawl over his shoulders, and went to her washing-up.The reader may, perhaps, be surprised that all this should pass without eliciting either opposition or remark from the king of Norfolk; but the fact was, that Leicester, although in general a very temperate man, had been so much pleased with the flavour of Wat Turner's wine, and had so often replenished his cup that he had not been, for the last half hour, precisely in a situation either to combat or agree to any proposition. Indeed, had any of the members been bold enough to submit a motion, depriving him of his kingship elect, it is a question if he would have resisted, so much was the natural arrogance and asperity of his temper softened by the genial beverage.

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

THREE:The neighbourhood pitied him in his loss. There was indeed something rather pathetic about this old man of eighty, who had lost nearly all his kith and kin, yet now tasted bereavement for the first time. They noticed that he lost some of the erectness which had distinguished him, the corners of his mouth drooped, and his[Pg 418] hair, though persistently thick, passed from iron grey to a dusty white.
  • 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:The court of Pie-powder was situated at the extremity of the fair-green, about twenty paces beyond the last stall: the court was a kind of tent, with a large, high-backed chair in the centre for the judge, a long table being placed before him, on which were balances and weights of various descriptions, to ascertain the truth of any charges that might be preferred against the sellers at the fair: there was also a smaller balance, a stone, and a small phial of liquid, to prove the weight and purity of any coin that might be doubted. At each extremity of the table was a bench, on which sat six men, to act as jurors. Although in a fair, the court was conducted with some attention to propriety; the clerk, who sat as judge, assumed as much importance as a dignitary of a higher tribunal; and, as the crowd approached, hallooing and vociferating, with the culprit, two men, who stood at the door with maces in their hands, prevented the rush of the people: and, by order of the judge, the accuser, the offender, and two witnesses were the only persons permitted to enter. The charge was laid;the foreign dusty-foot was accused of defrauding the accuser's wife, one Martha Fuller, of the value of half a noble.

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