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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:Her voice sank to a thrilling whisper. Bruce touched her hand soothingly. The mere contact of his fingers seemed to madden her.At Vis many men had been commanded to do certain kinds of work, cutting down trees, making of roads, bridges, and so on. Many of them never returned, because they refused to do the humiliating work and were shot. Among these there were even aged people; and I myself stood by the death-bed of a man of ninety, who had been forced to assist in building a bridge, until the poor wretch broke down and was carried to St. Hadelin College, turned into a hospital by Dr. Goffin; there he died.

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

THREE:"Then I shall shoot."
  • 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:"You don't play," she said. "What interest is there to you?"We have next the disposition of individuals, no longer to interfere in making the law, but to override it, or to bend it into an instrument for their own purposes. Doubtless there existed such a tendency in Platos time, and his polity was very largely designed to hold it in check. But such unprincipled ambition was nothing new in Greece, however the mode of its manifestations might vary. What had formerly been seized by armed violence was now sought after with the more subtle weapons of rhetorical skill; just as at the present moment, among these same Greeks, it is the prize of parliamentary intrigue. The Cretan and Spartan institutions may very possibly have been designed with a view to checking this spirit of selfish lawlessness, by reducing private interests to a minimum; and Plato most certainly had them in his mind when he pushed the same method still further; but those institutions were not types of Hellenism as a whole, they only represented one, and that a very abnormal, side of it. Plato borrowed some elements from this quarter, but, as we shall presently show, he incorporated them with others of a widely different character. Sparta was, indeed, on any high theory of government, not a State at all, but a robber-clan established among a plundered population whom they never tried or cared to conciliate. How little weight her rulers attributed to the interests of the State as such, was well exhibited during the Peloponnesian War, when political advantages of the utmost importance were surrendered in deference to the noble families whose kinsmen had been captured at Sphactria, and whose sole object was to rescue them from the fate with which they were threatened by the Athenians as a means of extorting concessions;conduct with which the refusal of Rome to ransom the soldiers who had surrendered at Cannae may be instructively contrasted.

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