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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: My dearest Sister,I am in despair that I can not satisfy158 my impatience and my duty, to throw myself at your feet this day. But, alas! dear sister, it does not depend upon me. We poor princes are obliged to wait here till our generals come up. We dare not go along without them. They broke a wheel in Gera. Hearing nothing of them since, we are absolutely forced to wait here. Judge in what a mood I am, and what sorrow must be mine. Express order not to go by Baireuth or Anspach. Forbear, dear sister, to torment me on things not depending on myself at all.
  • 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:It was a serene, cloudless May morning when Frederick rode upon a small eminence to view the approach of his troops, and to form them in battle array. General Stille, who was an eye-witness of the scene, describes the spectacle as one of the most beautiful and magnificent which was ever beheld. The transparent atmosphere, the balmy air, transmitting with wonderful accuracy the most distant sounds, the smooth, wide-spreading prairie, the hamlets, to which distance lent enchantment, surmounted by the towers or spires of the churches, the winding columns of infantry and cavalry, their polished weapons flashing309 in the sunlight, the waving of silken and gilded banners, while bugle peals and bursts of military airs floated now faintly, and now loudly, upon the ear, the whole scene being bathed in the rays of the most brilliant of spring morningsall together presented war in its brightest hues, divested of every thing revolting.65

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

THREE:
  • 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:It is late. I wish you had done.In the mean time Frederick took positions which commanded the three gates on his, the southern, side of the river; constructed a bridge of boats; and sent four hundred men across the stream, and made preparations to force an entrance. At four oclock in the afternoon of Monday, not a gun having yet been fired, a messenger brought the intelligence that the town would be surrendered. At eight oclock the next morning, Tuesday, 3d of January, 1741, the city authorities came in their coaches, with much parade, to welcome their new sovereign. It was a bitter cold morning. The king had ridden away to reconnoitre the walls in their whole circuit. It was not until near noon that he was prepared to accompany the officials to the palace which was made ready for him. He then, on horseback, attended by his principal officers, and followed by an imposing retinue, in a grand entrance, proudly took possession of his easy conquest.230 He rode a very magnificent gray charger, and wore his usual cocked hat and a blue cloak, both of which were somewhat the worse for wear. Four footmen, gorgeously dressed in scarlet, trimmed with silver lace, walked by the side of his horse. The streets through which he passed were thronged, and the windows and balconies were crowded with spectators of both sexes. Though Frederick did not meet with an enthusiastic reception, he was very gracious, bowing to the people on each side of the street, and saluting with much courtesy those who seemed to be people of note.

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