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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:
  • 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:The secret was now out. The tidings flew in all directions that the King of Prussia was in Strasbourg incognito. The king, not yet aware of the detection, called upon the marshal. A crowd of officers gathered eagerly around. The marshal was much embarrassed in his desire to respect the incognito, and also to manifest the consideration due to a sovereign. No one yet ventured to address him as king, though there were many indications that his rank was beginning to be known. Frederick therefore decided to get out of the city as soon as possible. To conceal his design, he made arrangements to attend the theatre with the marshal in the evening. The marshal went to the theatre with all his officers. The building was crowded with the multitude hoping to see the king. Bonfires began to blaze in the streets, and shouts were heard of Long live the King of Prussia. Frederick hastily collected his companions, paid his enormous bill at the Raven, shot off like lightning, and was seen in Strasbourg no more.

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

THREE:But Frederick did not seem to think himself at all bound by his treaty obligations with France to refrain from entering into secret arrangements with the foe which would promote his interests, however antagonistic those arrangements might be to his assumed obligations. He was the ally of France in the attempt to wrest territory from the young Queen of Austria, and to weaken her power. His armies and those of France were acting in co-operation. Frederick now proposed to the common enemy that, if Silesia were surrendered to him, he would no longer act in co-operation with his ally; but, that France might not discover his perfidy, he would still pretend to make war. The Austrians were to amuse themselves in defending Neisse from a sham siege until the pleasant weeks of autumn were gone, and then they were to march, with all their guns and ammunition, south to Vienna, there to fight the French. Frederick, still assuming that he was the ally of France, was to avail himself of the excuse that the season of ice and snow was at hand, and withdraw into winter quarters. Such, in general, were the terms which Frederick authorized his minister, Goltz, to propose to Lord Hyndford, as the agent of England and Austria.
  • 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:The king soon learned, to his inexpressible displeasure and mortification, that his boy was not soldierly in his tastes; that he did not love the rude adventures of the chase, or the exposure and hardships which a martial life demands. He had caught Fritz playing the flute, and even writing verses. He saw that he was fond of graceful attire, and that he was disposed to dress his hair in the French fashion. He was a remarkably handsome boy, of fine figure, with a ladys hand and foot, and soft blonde locks carefully combed. All this the king despised. Scornfully and indignantly he exclaimed, My son is a flute-player and a poet! In his vexation he summoned Fritz to his presence, called in the barber, and ordered his flowing locks to be cut off, cropped, and soaped in the most rigid style of military cut.

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