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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:And there, under the open sky, stands the crowning marvel of Ellora, the temple or Kailas, enclosed within a wall thirty metres high, pierced with panels, balconies, and covered arcades, and resting on lions and elephants of titanic proportions. This temple is hewn out of a single rock, isolated from the hill, and is divided into halls ornamented in high relief. Covered verandahs run all round the irregular mass in two storeys, reminding us, in their elaborate design, of the Chinese balls of carved ivory with other balls inside them. Nothing has been added or built on. The complicated architectureall in one piece, without cement or the smallest applied ornamentmakes one dizzy at the thought of such a miracle of perseverance and patience.
  • 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:As we returned, vistas of unreal definiteness showed us endless valleys lost in the distance, and vast spaces cultivated in green and russet stripesthe tea plantations that spread below the now vanished splendour of the snows. At a turning in the road stands a cross, erected there in memory of an epidemic of suicide that broke out among the soldiers of the English forta small structure of stone with an iron roof that faces the heaven-scaling range.

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

THREE:After him came another little Hindoo, dragging a mongoose, very like a large weasel with a fox's tail. He took a snake out of a bag, and a battle began between the two brutes, each biting with all its might; the sharp teeth of the mongoose tried to seize the snake's head, and the reptile curled round the mongoose's body to bite under the fur. At last the mongoose crushed the serpent's head with a fierce nip, and instantly a hawk flew down from a tree and snatched away the victim.
  • 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:Among the officers was a young lady on horseback, her black habit covered with dust. Instead of the pith helmet that the English ladies disfigure themselves by wearing, she had a straw hat with a long cambric scarf as a pugaree. She was pretty and sat well, and at the last turning she pulled up and watched the men, the ammunition and the baggage all march past, saluted them with her switch, and cantered off to the town of "cottages." I saw her again in the afternoon, taking tea in her garden as she sat on a packing-case among eviscerated bales, and giving orders to a mob of slow, clumsy coolies, who were arranging the house.The forest round Kandy is glorious, an exuberance, a crush of trees growing as thick as they can stand, the dense tangle of boughs and leaves outgrown by some enormous ficus, or tall terminalia, whose sharp, angular roots have pushed through the soil while its trunk, twisting in a spiral, has made its way to a prodigious height, ending a thick dome of foliage. This, again, is overgrown by delicate creepers decking the green mass with their flowers. Spreading banyans, with a hundred stems thrown out like branches and ending in roots, form colonnades of a rosy grey hue like granite, and might seem to be the vestiges of some colossal church with a dark vault above, scarcely pierced here and there by a gleam of blue light from the sky beyond. Among these giants of the forest dwells a[Pg 131] whole nation of bending ferns as pliant as feathers, of clinging plants hanging in dainty curtains of flowers from tree to tree. Sometimes between the screen of flowers a bit of road comes into view, deep in impalpable brick-red dust, of the same tint as the fruits that hang in branches from the trees.

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