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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:(After the Portrait by A. E. Challon, R.A.)
  • 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 effects of the monstrous drain of the war on the revenues of the country were now beginning to show themselves in the manufacturing districts, and the workpeople had broken out in serious riots in Lancashire, Yorkshire, and Cheshire. Instead of attributing their distresses to the vast system of taxation, they attributed them to the increase of machinery, and broke into the mills in many places and destroyed it. This was only adding to the misery by destroying capital, and stopping the very machinery which gave them bread. A committee of inquiry was instituted, and the result showed that the members of Parliament were not a whit more enlightened than the artisans themselves. Instead of attempting to find some means of ameliorating the condition of the starving populationwhich, indeed, they could not do, for nothing but peace and reduction of taxation, and the restoration of the natural conditions of commerce could do it,they recommended coercion, and Lord Castlereagh brought in a severe Bill for the purpose,the first of many such Bills of his, which nearly drove the people eventually to revolution, and, by a more fortunate turn, precipitated reform of Parliament. This Bill, the operation of which was limited to the following March, was carried by large majorities, and Parliament, thinking it had done enough to quiet hungry stomachs in the north, was prorogued on the 30th of July, and on the 20th of September dissolved.But the attempts to reduce the other chiefs to subjection were unsuccessful. An unfortunate collision with the tribes of Ghilzais formed a painful episode in the Afghan war. The Cabul Pass is a long defile, through which the road runs from Cabul to Jelalabad, which it was therefore necessary to keep open for the purpose of safe intercourse between Cabul and British India. The Indian Government thought that the most desirable mode of effecting this object was to pay the Ghilzai chiefs a yearly sum from the Cabul treasury, in order that our troops might not be molested. But retrenchment being determined upon, the money was withheld; the chiefs, therefore, felt that the British had been guilty of a deliberate breach of faith. They were exasperated, assumed a hostile attitude, and cut off all communication with British India. It therefore became necessary to force the Pass, for which purpose Major-General Sir Robert Sale was sent by General Elphinstone from Cabul, with a brigade, of light infantry. On the 12th of October they entered the Pass, near the middle of which the enemy were found posted behind precipitous ridges of the mountains on each side, from which they opened a well-directed fire. General Sale was hit with a ball above the ankle, and compelled to retire and give the command to Colonel Dennie. The Pass was gallantly cleared, but with severe fighting and heavy loss. After this was accomplished, the force had still to fight its way through a difficult country, occupied by an active enemy, for eighteen days. All the commanding points of the hills were held by the Ghilzais, where they were protected by breastworks; and though they had been from time to time outflanked and routed, when the march was resumed and the cumbrous train of baggage filed over the mountains the enemy again appeared from beyond the most distant ridges, renewing the contest with increased numbers and the most savage fury. Since leaving Cabul our troops had been kept constantly on the alert by attacks night and day. Their positions had been secured only by unremitting labour, throwing up entrenchments, and very severe outpost duty. The enemy were eminently skilful at the species of warfare to which their attempts had been confined, and were armed with weapons that enabled them to annoy the invaders from a distance at which they could be reached only by our artillery. The brigade reached Jelalabad on the 12th of November.

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

THREE:Meanwhile Brigadier Wild occupied a position of great difficulty at Peshawur. He had four native infantry regiments, containing a large number of young soldiers, whom the mutinous Sikhs had impressed with a great horror of the Khyber Pass. The only cavalry he had was a troop of irregular horse, and the only guns, four pieces of Sikh artillery. Besides, the owners of the camels, which had been hired at Ferozepore to proceed as far as Jelalabad, refused to advance farther than Peshawur. It was in these circumstances that Sale and M'Gregor earnestly urged the advance of the brigade for the relief of that place. The fortress of Ali Musjid, regarded as the key to the Khyber Pass, is situated about[498] twenty-five miles from Peshawur: and as it lay between the two positions of Sale and Wild, it was of the utmost importance that it should be occupied. It was accordingly resolved that one-half of Wild's brigade should be dispatched for this service. On the 15th of January Colonel Moseley, with the 53rd and 64th Sepoy Regiments, started under cover of the night, and reached their destination early in the morning. The fortress was about five miles up the Pass. Soon after they had taken up their position they discovered to their dismay that owing to some mistake, instead of 350 supply bullocks, which had been ordered, only fifty or sixty had arrived. Here, then, were two regiments shut up in an isolated fortress without provisions. Day after day passed and no succour came. Wild made an effort to send forward supplies, but the attempt was a disastrous failure. The Sikh auxiliaries mutinied to a man, and refused to enter the Pass. There being no prospect of relief, Colonel Moseley determined to evacuate the fortress. Captain Burt and Captain Thomas offered to remain and keep possession of so important a position, if only 150 men would volunteer for the service. But none were found willing to undertake the perilous duty, and so Ali Musjid was abandoned and suffered to fall into the hands of the Afreedis. The brigade had some fighting on its way back. Some of its officers were killed, some wounded and sick were abandoned, and some baggage was lost.
  • 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:[See larger version]

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