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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 the mean time the Austrians had turned in upon us a rivulet, and by midnight we found our horses in the water up to their bellies. We were really incapable of defending ourselves.
  • 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 Russians marched to Poland. The Austrians returned to Saxony. As soon as Frederick heard of their retreat, instead of continuing his march to Berlin, he also turned his columns southward. On the 27th of October he crossed the Elbe, about sixty miles above Dresden, and found himself in the vicinity of General Daun, whose army outnumbered that of Frederick two to510 one. The situation of Frederick was extremely critical. Under these circumstances, he wrote to DArgens on the 28th:293 Of the political morality of this game of fast-and-loose what have we to say, except that the dice on both sides seem to be loaded; that logic might be chopped upon it forever; that a candid mind will settle what degree of wisdom (which is always essential veracity) and what of folly (which is always falsity) there was in Frederick and the others; whether, or to what degree, there was a better course open to Frederick in the circumstances; and, in fine, it will have to be granted that you can not work in pitch and keep hands evidently clean. Frederick has got into the enchanted wilderness populous with devils and their work, alas! It will be long before he get out of it again; his life waning toward night before he get victoriously out, and bequeath his conquest to luckier successors!

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

THREE:Frederick, establishing his head-quarters at Chrudim, did not suppose the Austrians would think of moving upon him until the middle of June. Not till then would the grass in that cold region afford forage. But Maria Theresa was inspired by energies fully equal to those of her renowned assailant. Undismayed by the powerful coalition against her, she sent Prince Charles, her brother-in-law, early in May, at the head of an army thirty thousand strong, to advance by a secret, rapid flank march, and seize the Prussian magazines beyond the Elbe.
  • 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:

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