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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:CHAPTER XXI. ASYLUMS OF REFUGE.It is sometimes the custom to release a man from the punishment of a slight crime when the injured person pardons him: an act, indeed, which is in accordance with mercy and humanity but contrary to public policy; as if a private citizen could by his remission do away with the necessity of the example in the same way that he can excuse the reparation due for the offence. The right of punishing does not[190] rest with an individual, but with the community as a whole, or the sovereign. An individual can only renounce his particular portion of that right, not annul that of all the rest.
  • 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 second epoch of history consists in the hard and terrible transition from errors to truth, from the darkness of ignorance to the light. The great clash between the errors which are serviceable to a few men of power and the truths which are serviceable to the weak and the many, and the contact and fermentation of the passions at such a period aroused, are a source of infinite evils to unhappy humanity. Whoever ponders on the different histories of the world, which after certain intervals of time are so much alike in their principal episodes, will therein frequently observe the sacrifice of a whole generation[248] to the welfare of succeeding ones, in the painful but necessary transition from the darkness of ignorance to the light of philosophy, and from despotism to freedom, which result from the sacrifice. But when truth, whose progress at first is slow and afterwards rapid (after mens minds have calmed down and the fire is quenched that purged a nation of the evils it suffered), sits as the companion of kings upon the throne, and is reverenced and worshipped in the parliaments of free governments, who will ever dare assert that the light which enlightens the people is more injurious than darkness, and that acknowledging the true and simple relations of things is pernicious to mankind?

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

THREE:Another principle would serve admirably to draw still closer the important connection between a misdeed and its punishment, and that is, that the latter should as far as possible conform to the nature of the crime. This analogy facilitates marvellously the contrast that ought to exist between the impulse to[188] the crime and the counter-influence of the punishment, the one, that is, diverting the mind and guiding it to an end quite different from that to which the seductive idea of transgressing the law endeavours to lead it.The lighting of a city by night at the public expense; the distribution of guards in the different quarters; simple moral discourses on religion, but only in the silent and holy quiet of churches, protected by public authority; speeches on behalf of private and public interests in national assemblies, parliaments, or wherever else the majesty of sovereignty residesall these are efficacious means for preventing the dangerous condensation of popular passions. These means are a principal branch of that magisterial vigilance which the French call police; but if this is exercised by arbitrary laws, not laid down in a code of general circulation, a door is opened to tyranny,[221] which ever surrounds all the boundaries of political liberty. I find no exception to this general axiom, that Every citizen ought to know when his actions are guilty or innocent. If censors, and arbitrary magistrates in general, are necessary in any government, it is due to the weakness of its constitution, and is foreign to the nature of a well organised government. More victims have been sacrificed to obscure tyranny by the uncertainty of their lot than by public and formal cruelty, for the latter revolts mens minds more than it abases them. The true tyrant always begins by mastering opinion, the precursor of courage; for the latter can only show itself in the clear light of truth, in the fire of passion, or in ignorance of danger.
  • 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:For since the observance of some regular proportion between crime and punishment, whatever that proportion may be, constitutes the first principle of an[87] equitable code; and since the most important thing in public morality is a fixed penal estimate for every class of crime; it is above all things desirable that the law should always adhere to such proportion and estimate, by concerning itself solely with the crime and not with the criminal. The injury to the public is precisely the same whether a criminal has broken the law for the first time or for the thousandth and first; and to punish a man more severely for his second offence than for his first, because he has been punished before, is to cast aside all regard for that due proportion between crime and punishment which is after all the chief ingredient of retributive justice, and to inflict a penalty often altogether incommensurate with the injury inflicted on the public.

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