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TWO:Text-books, such as relate to construction, consist generally of examples, drawings, and explanations of machines, gearing, tools, and so on; such examples are of use to a learner, no doubt, but in most cases he can examine the machines themselves, and on entering a shop is brought at once in contact not only with the machines but also with their operation. Examples and drawings relate to how machines are constructed, but when a learner comes to the actual operation of machines, a new and more interesting problem is reached in the reasons why they are so constructed.

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:In absolute value, Neo-Platonism stands lowest as well as last among the ancient schools of thought. No reader who has followed us thus far will need to be reminded how many valuable ideas were first brought to light, or reinforced with new arguments and illustrations by the early Greek thinkers, by the Sophists and Socrates, by Plato and Aristotle, by the Stoics, Epicureans, and Sceptics, and by the moralists of the Roman empire. On every subject of speculation that can be started, we continue to ask, like Plotinus himself, what the blessed ancients had to say about it;501 not, of course, because they lived a long time ago, but because they came first, because they said what they had to say with the unique charm of original discovery, because they were in more direct contact than we are, not, indeed, with the facts, but with the336 phenomena of Nature and life and thought. It is true that we have nothing more to learn from them, for whatever was sound in their teaching has been entirely absorbed into modern thought, and combined with ideas of which they did not dream. But until we come to Hume and his successors, there is nothing in philosophical literature that can be compared to their writings for emancipating and stimulating power; and, perhaps, when the thinkers of the last and present centuries have become as obsolete as Bacon and Descartes are now, those writings will continue to be studied with unabating zeal. Neo-Platonism, on the other hand, is dead, and every attempt made to galvanise it into new life has proved a disastrous failure. The world, that is to say the world of culture, will not read Plotinus and his successors, will not even read the books that are written about them by scholars of brilliant literary ability like MM. Vacherot and Jules Simon in France, Steinhart and Kirchner in Germany.502
  • 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:J. R.

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

THREE:"The Corner House Mystery! Startling Developments! Ren Lalage's Escape From Holloway! A Warder Seriously Injured! The Culprit Succeeds In Getting Clear Away!"
  • 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:After his Eminence had allowed me to kiss his ring, he asked me to sit down. I had now a good opportunity to notice how grief dwelt on his212 entirely spiritualised face, in its frame of white hair. But his extraordinary kindness in intercourse did not leave him for one moment.

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