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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:The next day, the 11th, Frederick wrote from Neustadt to the Countess of Camas, who at Berlin was the grand mistress of the queens household. The trifling tone of this letter, which was penned in the midst of a struggle so awful, is quite characteristic of the writer:
  • 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 torments of Tantalus, the pains of Prometheus, the doom of Sisyphus, were nothing to the torments I have suffered for the last ten days. Death is sweet in comparison with such a life. Pity me, and believe that I still keep to myself a great many evil things, not wishing to afflict or disquiet any body with them. Believe me that I would not counsel you to fly these unlucky countries if I had any ray of hope. Adieu, mon cher.

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

THREE:Let the parsons who make for themselves a cruel and barbarous God be eternally damned, as they desire and deserve; and let those parsons who conceive God gentle and merciful enjoy the plenitude of his mercy.Thus Frederick found himself in a barren, hostile country, with a starving army, incessantly assailed by a determined foe, groping his way in absolute darkness, and with the greatest difficulty communicating even with his own divisions, at the distance of but a few leagues. He knew not from what direction to anticipate attack, or how formidable might be his assailants. He knew not whether the French, on the other side of the Rhine, had abandoned him to his own resources, or were marching to his rescue. He knew that they were as supremely devoted to their own interests as he was to his, and that they would do nothing to aid him, unless by so doing they could efficiently benefit themselves.
  • 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:As night came on he fell into what may be called the death-sleep. His breathing was painful and stertorous; his mind was wandering in delirious dreams; his voice became inarticulate. At a moment of returning consciousness he tried several times in vain to give some utterance to his thoughts. Then, with a despairing expression of countenance, he sank back upon his pillow. Fever flushed his cheeks, and his eyes assumed some of their wonted fire. Thus the dying hours were prolonged, as the friendless monarch, surrounded by respectful attendants, slowly descended to the grave.

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