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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 September, 1749, Madame Du Chatelet, the divine Emilie of Voltaire, suddenly died. The infidel philosopher seemed much grieved for a time. Frederick, who never fancied Madame Du Chatelet, was the more eager, now that she was out of the way, that Voltaire should come to Sans Souci, and aid him in his literary labors. A trivial incident occurred at this time worthy of record, as illustrative of the character of the king. At the close of the year 1749 there had been a review of Austrian troops at M?hren. It was not a very important affair, neither the empress queen nor her husband being present. Three380 Prussian officers made their appearance. It was said that they had come to inveigle soldiers to desert, and enlist under the banners of Prussia. They were peremptorily ordered by the Austrian authorities to leave the ground. Frederick, when he heard of it, said nothing, but treasured it up.
  • 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:Fritz, having thus established his outposts, was accustomed to retire to his room with his teacher, lay aside his tight-fitting Prussian military coat, which he detested, and called his shroud, draw on a very beautiful, flowing French dressing-gown of scarlet, embroidered with gold, and decorated with sash and tags, and, with his hair dressed in the most fashionable style of the French court, surrender himself to the indulgence of his own luxurious tastes for sumptuous attire as well as for melodious sounds. He was thus, one day, in the height of his enjoyment, taking his clandestine music-lesson, when Lieutenant Katte came rushing into the room in the utmost dismay, with the announcement that the king was at the door. The wily and ever-suspicious monarch had stolen the march upon them. He was about to make his son a very unwelcome surprise visit.

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

THREE:The exigency demanded the most decisive action. Frederick promptly gathered his army, and dashed across the Moldau, resolved, with the energies of despair, to smite down the troops of Prince Charles; but no foe could be found. For four days he sought for them in vain. He then learned that the Austrian army had crossed the Moldau several miles north of him, thus cutting off his communications with Prague.246
  • 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:This visit to Dresden, so fatal to Fritz, was closed on the 12th of February. The dissipation of those four weeks introduced the Crown Prince to habits which have left an indelible stain upon his reputation, and which poisoned his days. Upon his return to Potsdam he was seized with a fit of sickness, and for many years his health remained feeble. But he had entered upon the downward course. His chosen companions were those who were in sympathy with his newly-formed tastes. The career of dissipation into which the young prince had plunged could not be concealed from his eagle-eyed father. The kings previous dislike to his son was converted into contempt and hatred, which feelings were at times developed in almost insane ebullitions of rage.

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