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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 sulphur comes from the provinces of Satsuma and Bungothe most from the latter, and the best from the former; and the product is partly for the use of the mint, and partly for general commerce. The acid is packed in earthen jars which are glazed on the inside, and not in the carboys that are in use with us. Two jars, holding about eight quarts each, are packed in a wooden case; they rest on a bed of lime about three inches thick, and the remainder of the space is filled with coarse ashes and coal cinders. This manner of packing is considered preferable to the old one, and, besides, it enables the Japanese to make their own jars, instead of importing the carboys. The director tells me that thus far the factory has not been able to supply the Chinese demand for acid, and therefore no shipments have been made to other countries. With an increased production, it is quite possible that shipments may be made to America at no very distant day.
  • 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:And then he stopped abruptly, aware of a cool sensation on the top of his head. His hat and wig had gone! Aghast, he retraced his steps, but there was no sign of the articles on the pavement. It seemed utterly incredible, for there was only a slight breeze and he did not remember knocking into anything. He had certainly not collided with the stranger. Just for a moment he wondered.

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

THREE:I could not divine what there was ridiculous about me, except a certain damage to my dress, of which she could not possibly be aware as long as I remained in the saddle. Yet plainly she wanted to laugh. I made it as plain that I did not.Lilian glanced up at them. "If only we could keep there! By their habitations are men known. A house ought to be a sort of resting place. No more. Once you elaborate it, it becomes a prison, with hard labour attached."
  • 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:"But it is so," protested Arthur. "You didn't see him as I did. He was like nothing on earthand then he began to work. Just like a motor starting. And then that noise began. I'm sure there's something inside him, something that goes wrong sometimes." What so proudly we hailed at the twilight's last gleaming?"

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