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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 events that followed form part of the general history of that time. The Government well knew that they were more popular in the country than their opponents. In the few days that succeeded, during which men were doubtful if they would resign, the Minister had had time to feel the power of that popularity, and the value of the support of the Free Trade party. To satisfy the selfish expectations of the more bigoted of his own supporters must have seemed to him more and more helpless. To break with them, and to look elsewhere for the support which their vindictiveness would inevitably render necessaryto become less a leader of a class, and more a statesman seeking the true foundations of power in a steady regard to the welfare of the great bulk of the communitywere ideas naturally present to the Minister's mind. When he met Parliament again to announce the determination of the Government to ask the House to reconsider its decision, his tone was observed to be more bitter than before. His allusions to the defections of his own followers were significant; but they plainly indicated that his course was taken. "We cannot conceal from ourselves," he said, "that in respect to some of the measures we have proposed, and which have been supported, they have not met with that cordial assent and agreement from those for whose character and opinions we entertain the[514] highest and sincerest respect. But I am bound to say, speaking here of them with perfect respect, that we cannot invite their co-operation and support upon the present occasion by holding out expectations that we shall take a middle or other course with regard to those measures which we believe to be best for the interests of the country, and consistent with justice." This modest but firm defiance of the ultra-Protectionist party was not lost upon the Free Traders in the House; neither were the Minister's further remarks"We have thought it desirable to relax the system of Protection, and admit into competition with articles of the domestic produce of this country articles from foreign lands. We have attempted to counsel the enforcement of principles which we believe to be founded in truth, and with every regard for existing institutions, and with every precaution to prevent embarrassment and undue alarm."There was a radical difference in spirit between the Viceroy and the Premier. The former sympathised warmly with the Roman Catholics in their struggles for civil equality, feeling deeply the justice of their cause. The Duke, on the other hand, yielded only to necessity, and thought of concession not as a matter of principle, but of expediency; he yielded, not because it was right[291] to do so, but because it was preferable to having a civil war. The feeling of Mr. Peel was somewhat similar; it was with him, also, a choice of evils, and he chose the least.
  • 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 earliest idea of a steam-engine was that given by the Marquis of Worcester, in his "Century of Inventions," in 1663, which idea he obtained from De Caus, and reduced to action in London. The next step was to Papin's Digester, and then to Savery's so-called "Atmospheric Engine." This, improved by Newcomen in 1711,[195] was introduced to drain mines in all parts of the kingdom, but especially in the coal-mines of the north and midland counties, and the copper mines of Cornwall. By its means many mines long disused through the accumulation of water were drained and made workable, and others were sunk much deeper. Smeaton, in 1769, greatly improved this engine, which, from its rapid working of a horizontal beam, was called by the miners a "Whimsey," as having a whimsical look. Watt, then a student in the University of Glasgow, commenced a series of experiments upon it, which, between 1759 and 1782, raised the engine to a pitch of perfection which made it applicable not only to draining water out of mines, but, by the discovery of the rotatory motion, enabled it to propel any kind of machinery, spin cotton, grind in mills of all kinds, and propel ships and carriages. Watt was greatly aided in his efforts by Mr. Matthew Boulton, and their engines were manufactured at Soho Works, near Birmingham. They did not, however, enjoy the fruits of their patents for protecting their inventions without many most unprincipled attempts to invade their rights by masters of mines and others, by which they were involved in very harassing law-suits. The first application of the steam-engine to the machinery of a cotton-mill was at Papplewick, in Nottinghamshire, in 1785, and the first mill built for the employment of machinery driven by an engine was in Manchester, in 1789. The first application of the engine to propel a vessel was at Dalswinton, on the Clyde, in 1788, the boat being constructed by Patrick Miller, James Taylor, and William Symington. In the following year these inventors made a second experiment on the Forth and Clyde Canal at the Carron Works, with perfect success, the vessel going at the rate of nearly seven miles an hour. Symington was probably the real machinist in this firm, and in 1802 he made a tug-boat on the Forth and Clyde Canal, under the patronage of Lord Dundas, which was worked extremely well by its engine. In 1807 Fulton followed up these experiments by launching a steam-boat on the Hudson, in America, after having in vain solicited the patronage of the British and French Governments for his enterprise. The proposal of Fulton, submitted to the Academy of Paris, was received with a burst of laughter, and Napoleon abandoned the project in deep disgust at having been, as he supposed, made a dupe of by Fulton. We have pointed out on the preceding page the period of the first application of the steam-engine to railways.

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:Meanwhile, the first municipal election under the Manchester Charter of Incorporation had been held, at which Mr. Cobden, and a number of other gentlemen professing Free Trade views, had been chosen aldermen, not without formidable opposition. At a meeting held at Leeds, and attended by seven or eight thousand persons, the Chartists, under Mr. Feargus O'Connor, resisted the resolutions of the Free Traders, on the ground that the movement was one only intended to give the manufacturers power to lower the wages of their workmena mistaken doctrine, but one not altogether without support in the writings of the Free Trade party, some of whom, with the common propensity of zealous advocates for adopting doubtful arguments as well as good ones in support of their objects, had put forth the statement that the British manufacturer required cheap food in order to get cheap labour, and thus to compete the better with foreign producers. The opposition of the Chartists created great confusion at almost every meeting held under the auspices of the Manchester Association. Bread, however, continued to rise, and the task of the Association in rousing the country became easier.The cause of the Pretender sank in proportion to the peace throughout Europe and the prosperity at home. From 1728 to 1740 it was at a very low ebb, and lost the few marked men who had moved in it. Three of the chief leaders died about this timeMar, Wharton, and Atterbury. So low was the Jacobite interest now fallen, that Sir Robert Walpole said that, if ever the Stuarts came again, it must be through the lowest people, for the chiefs were all dead or discouraged.

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