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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:"That is a promise," the Indian insisted, "to pay me dos reales a day if I would cut hay for him."
  • 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:"On his ranch, living on the fat of a lean land, I believe. He's rich, you know. I don't know much about them. I've small use for them. And I used to like Cairness, too. Thought he was way above his job. Those squaw-men lose all sense of honor."

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

THREE:He was still more exasperated, with himself and with her, that he had allowed himself to think for one moment that she had come on purpose to find him. Where were the others? How did she happen to be here alone? he asked.[Pg 20]
  • 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:"How," answered Felipa, as unconcernedly as though she had not recognized him almost at once for the buck she had last seen in the A tent beside the hospital, with the doctor picking pieces of bone and flesh from his shoulder. Then she took the quiver and examined it. There was a bow as tall as herself, and pliable as fine steel, not a thing for children to play with, but a warrior's arm. Also there were a number of thin, smooth, gayly feathered arrows. "Malas," he told her, touching the heads. "Venadas" and she knew that he meant that they were poisoned by the process of [Pg 89]dipping them in putrid liver, into which a rattler had been made to inject its venom. Even then the sort was becoming rare, though the arrow was still in use as a weapon and not merely as an attraction for tourists.

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