摘要:
The gas separation and purification process can recover efficiently a valuable gas such as krypton and xenon to be used as an atmospheric gas in a semiconductor manufacturing equipment etc. by means of PSA process. In the process for separating a valuable gas in the form of purified product from a mixed gas, used as a raw gas, containing the valuable gas by means of pressure swing adsorption process, the valuable gas is separated and purified by using as the pressure swing adsorption process a combination of equilibrium pressure swing adsorption process for separating gas components based on the difference in equilibrium adsorption and rate-dependent pressure swing adsorption process for separating the gas components based on the difference in adsorption rates.
摘要:
There is provided a method and an apparatus for collecting a rare gas, which are capable of effectively collecting the rare gas contained in an exhaust gas exhausted from a rare gas using apparatus such as a plasma apparatus or the like, and moreover capable of securely supplying the rare gas having a predetermined purity to the rare gas using apparatus, and the method for collecting rare gas which comprises collecting a rare gas contained in an exhaust gas exhausted from a rare gas using apparatus operated under decompression, the method comprises the step of collecting the rare gas by separating the rare gas and impurities contained in the exhaust gas via at least two gas separating steps.
摘要:
Stable isotope atoms present in the form of stable isotope compounds, for example, 13C present in the form of 13CO, are separated by distillation using a distillation column packed orderly with a formed packing, and preferably by distillation using a distillation column packed with a “promoting-fluid-dispersion type” structured packing.
摘要:
There is disclosed a composition for use in the formation of an active light waveguide comprising a fluorinated polyamic acid and an electro-optical material. The active light waveguide is manufactured by subjecting the fluorinated polyamic acid to imide ring closure into a fluorinated polyimide, and orienting the electro-optical material. The active light waveguide fabricated by using the composition for use in the formation of the active light waveguide can provide excellent electro-optical effect. The active light waveguide is extremely thermally stable and suitable to manufacture of electro-optical devices.
摘要:
There are disclosed a novel naphthalocyanine derivative represented by the general formula [I] or [II] shown below, a process for preparing said derivative, an optical information recording medium using said derivative, and a process for preparing thereof: ##STR1## wherein M is a metal, metal oxide, metal hydroxide and the like, R.sup.1 is an alkyl group of 1-22 carbon atoms, n is an integer of 1 to 4, and Y.sub.1 and Y.sub.2 aryloxy group and the like.
摘要:
An ointment base for external use is provided which contains a water-soluble protein and monohydric alcohol or/and oleginous substance and additionally contains a wetting agent. The present ointment base offers a markedly improved percutaneous absorption of drugs, as compared with the conventional ointment bases.