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TWO:During the night they passed Cape King and entered Yeddo bay. The great light-house that watches the entrance shot its rays far out over the waters and beamed a kindly welcome to the strangers. Slowly they steamed onward, keeping a careful lookout for the numerous boats and junks that abound there, and watching the hundreds of lights that gleamed along the shore and dotted the sloping hill-sides. Sixty miles from[Pg 77] Cape King, they were in front of Yokohama; the engines stopped, the anchor fell, the chain rattled through the hawse-hole, and the ship was at rest, after her long journey from San Francisco. Our young adventurers were in Japan.

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:He was interested to learn that it was known as the Temple of the Sea-god, and had been at one time the residence of the Chinese commander of the Taku forts. It had a handsome front on the river, and a fleet of junks was moored directly above it. Each junk appeared to be staring with all the power of the great eyes painted on its bows, and some of the junks more distinguished than the rest were equipped with two eyes on each side, in order that they might see better than the ordinary craft. Flags floated from the masts of all the junks, and in nearly every instance they were attached to little rods, and swung from the centre. A Chinese flag twists and turns in the breeze in a manner quite unknown to a banner hung after the ways of Europe and America."The Great Wall is certainly one of the wonders of the world, and it was very much so at the time of its construction. It was built two thousand[Pg 387] years ago, and is about twelve hundred miles long. It runs westward from the shores of the Gulf of Pe-chi-li to what was then the western frontier of the Chinese Empire. For the greater part of the way it consists of a wall of earth faced with stone or brick, and it is paved on the top with large tiles. It is about twenty-five feet wide at the bottom, and diminishes to fifteen feet wide at the top, with a height of thirty feet. In many places it is not so substantial as this, being nothing more than a wall of earth faced with brick, and not more than fifteen feet high. At varying intervals there are towers for watchmen and soldiers. They are generally forty or fifty feet high, and about three hundred feet apart.
  • 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:In due time they entered the waters of the great river of Northern China, the Yang-tse. They entered them long before they sighted land, as the vast quantities of earth brought down by the stream make a change in the color of the sea that can be readily distinguished a great distance from the coast. In this respect the Yang-tse is similar to the Mississippi, and the effect of the former on the Yellow Sea is like that of the latter on the Gulf of Mexico. The coast at the mouth of the Yang-tse is low and flat, and a ship is fairly in the entrance of the river before land can be seen. The bar can be passed by deep-draught vessels only at high water, and consequently it often becomes necessary for them to wait several hours for the favorable moment. This was the case with our friends, and they walked the deck with impatience during the delay. But at last all was ready, and they steamed onward in triumph, dropping their tow at Woosung, and waving a good-bye to "the Mystery," who had recognized them from the deck of the disabled bark.

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

THREE:"Yes," I said, "the Captain's hit hard. I saw him when he was struck."
  • 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:

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