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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:"Suppose you let me call for volunteers," suggested Landor. He was sure of his own men, down to the last recruit.Among the scientific and literary men who were not pledged to any particular school, we find the elder Pliny rejecting the belief in immortality, not only as irrational but235 as the reverse of consolatory. It robs us, he declares, of Natures most especial boon, which is death, and doubles the pangs of dissolution by the prospect of continued existence elsewhere.361 Quintilian leaves the question undecided;362 Tacitus expresses himself doubtfully;363 and Galen, whose great physiological knowledge enabled him to see how fallacious were Platos arguments, while his philosophical training equally separated him from the materialists, also refuses to pronounce in favour of either side.364 What Juvenal thought is uncertain; but, from his general tone, we may conjecture that he leant to the negative side.365

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

THREE:"I didn't see the telegram, but it was in effect that he had no knowledge of anything of the sort, and put no faith in it."
  • 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:Who put the real ones there? Larry spoke abruptly in the astonished silence.

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