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

THREE:[See larger version]In the month of April arrived the permission for Sir William Howe to retire, and, although he was one of the five Commissioners named for carrying into effect the proposals in Lord North's Bill, he determined to leave at the earliest day for England. Lord Howe, the Admiral, was equally impatient to return, but Lord Sandwich had informed him that it would be considered a great misfortune for him to quit his command in the present circumstances. This was, in fact, an order for his remaining, which the breaking out of the war with France, and the expected arrival of a French fleet, rendered doubly imperative.[256] Sir Henry Clinton was appointed to succeed Sir William Howe, and, the former having arrived in Philadelphia, Howe departed. Scarcely had Clinton assumed the command, when an order arrived from the Government at home to abandon Philadelphia, and concentrate his forces at New York. The French fleet under D'Estaing was on its way, and it was considered that we had not a fleet of sufficient strength to beat them back from the mouth of the Delaware.
  • 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:By the 8th of October Wellington was safely encamped within these impregnable lines, and the crowd of flying people sought refuge in Lisbon, or in the country around it. The British did not arrive a moment too soon, for Massena was close at their heels with his van; but he halted at Sobral for three days to allow of the coming up of his main body. This time was spent by the British in strengthening their position, already most formidable. The two ranges of mountains lying one behind the other were speedily occupied by the troops; and they were set to work at more completely stopping up roads, and constructing barriers, palisades, platforms, and wooden bridges leading into the works. For this purpose fifty thousand trees were allowed them, and all the space between Lisbon and these wonderful lines was one swarming scene of people bringing in materials and supplies. The right of the position was flanked by the Tagus, where the British fleet lay anchored, attended by a flotilla of gunboats, and a body of marines occupied the line of embarkation; Portuguese militia manned the Castle of St. Julian and the forts on the Tagus, and Lisbon itself was filled with armed bands of volunteers. There was no want of anything within this busy and interesting enclosure, for the British fleet had the command of the sea and all its means of supply. Seven thousand Portuguese peasantry were employed in bringing in and preparing the timber for the defences; and every soldier not positively on guard was enthusiastic in helping the engineers and artillery in the labour of making the lines impregnable.The English army was now in full march against them. About eight o'clock in the morning of April 16 a man who had been left asleep in the wood of Kilravock hastened to Culloden House, where Charles and his chief officers were resting, to announce that Cumberland's troops were coming. There was then a hurried running and riding to get the army drawn up to receive them. Cumberland came on with his army, divided into three columns of five battalions each. The artillery and baggage followed the second column along the sea-coast on the right; the cavalry covered the left wing, which stretched towards the hills. The men were all in the highest spirits, and even the regiments of horse, which had hitherto behaved so ill, seemed as though they meant to retrieve their characters to-day. The Highlanders were drawn up about half a mile from the part of the moor where they stood the day before, forming a sad contrast to Cumberland's troops, looking thin, and dreadfully fatigued. In placing them, also, a fatal mistake was made. They were drawn up in two lines, with a body of reserve; but the Clan Macdonald, which had always been accustomed to take their stand on the right since Robert Bruce placed them there in the battle of Bannockburn, were disgusted to find themselves now occupying the left. Instead of the Macdonalds now stood the Athol Brigade. As the battle began, a snow-storm began to blow in the faces of the Highlanders, which greatly confounded them.

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