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TWO:Mrs Keeling rose from her chair. The dressing-bell had already sounded, and she had not had a moments rest since before lunch.Where are you going? asked Keeling.

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:
  • 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:To tell all that was done and seen by our young friends during their stay in Kioto would be to tell a great deal. They had their time fully occupied from their arrival to their departure, and they regretted much the necessity of leaving when they did. At the Doctor's suggestion, they attempted a new system of relating their adventures to their friends at home, and were so well pleased at the result that they determined to try it again. The new scheme was the preparation of a letter in which both had equal shares, Frank undertaking to write one half of it and Fred the other. They succeeded so well that when they read over their production to Doctor Bronson before sending it away, he was unable to say which was Fred's portion and which was Frank's. We will reproduce the letter and leave our readers to judge how well they performed their self-imposed duty. At the Doctor's suggestion, each of the boys wrote as though speaking for himself, and consequently the letter had a good deal of "I" in it.

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

THREE:After their sight-seeing in the grove of Dai-Boots was over, the party proceeded to Enoshima. When they arrived at the sea-shore opposite the island, they found, to their dismay, that the tide was up; and they were obliged to hire a boat to take them to their destination. At low tide one can walk upon a sand-bar the entire distance; but when the sea is at its highest, the bar is covered, and walking is not practicable. The beach slopes very gradually, and consequently the boats were at some distance out, and the travellers were compelled to wade to them or be carried on men's shoulders. The boys tried the wading, and were successful; the Doctor, more dignified, was carried on the shoulders of a stout Japanese, who was very glad of the opportunity to earn a few pennies. But he came near having a misadventure, as his bearer stumbled when close to the edge of the boat, and pitched the Doctor headlong into the craft. He was landed among a lot of baskets and other baggage, and his hat came in unpleasant contact with a bucket containing some freshly caught fish. Luckily he suffered no injury, and was able to join the others in laughing over the incident."Is that all you've noticed?" I smilingly inquired. "Isn't anybody else mortally in love with anybody else? You can't make me believe that's all you know!"
  • 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:He waddled swiftly along, and, to Arthur's great disappointment, disappeared round the corner of the hedge, so that it was impossible to get more than a fleeting glimpse of that fascinating object at the back of his head. But he was still speaking.

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