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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 boys looked in the direction indicated, but could see nothing. This is not surprising, when we remember that sailors' eyes are accustomed to great distances, and can frequently see objects distinctly long before landsmen can make them out.With a spasm of eagerness I said it did: "Our acquai'--hh--Gallatin--hh--" But my soul cried like a culprit, "No, no, it begins only now!" and my whole being stood under arrest before the accusing truth that from Gallatin till now my acquaintance had been solely with that false phase of her which I knew as Coralie Rothvelt. At the same her kind eyes sweetly granted me a stripling's acquittal--oh! why did it have to be a stripling's?
  • 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:Shanghai is very prettily situated in a bend of the river, and the water-front is ornamented with a small park, which has a background of fine buildings. These buildings are handsome, and the most of them are large. Like the foreign residences at the treaty ports of Japan, they have a liberal allowance of ground, so that nearly every house fronting on the river has a neat yard or garden in front of it. The balconies are wide, and they are generally enclosed in lattice-work that allows a free circulation of air. Back from the water-front there are streets and squares for a long distance; and the farther you go from the river-front, the less do you find the foreign population, and the greater the Chinese one. The foreign quarter is divided into three sectionsAmerican, English, and Frenchand each has a front on the river in the order here given, but the subjects, or citizens, of each country are not confined to their own national quarter; several Americans live in the French and English sections, and there are French and English inhabitants in the quarter where the American consul has jurisdiction. There is generally the most complete harmony among[Pg 321] the nationalities, and they are accustomed to make common cause in any dispute with the Chinese. Sometimes they fall out; but they very soon become aware that disputes will be to their disadvantage, and proceed to fall in again. There is a great deal of social activity at Shanghai, and a vast amount of visiting and dinner-giving goes on in the course of a year.From east to west in wild commotion."

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

THREE:
  • 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:FLYING KITES. FLYING KITES.

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