Patents Assigned to State Scientific-Research Designing Institute for Nitrogen Industry and for Products of Organic Synthesis
  • Stabilizers for compositions for acid gas absorbent
    Patent number: 5273679
    Abstract: A composition for acid gas absorbent comprising:(A): 99.99 to 70 wt % of a polyethylene glycol dimethyl ether composition represented by the following formula:CH.sub.3 O(C.sub.2 H.sub.4 O).sub.n CH.sub.3wherein n is an integer of 1 to 10; and,(B): 0.01 to 30 wt % of a compound containing at least one of an --NH-- group, a phenolic --OH group and an --S-- group in one molecule thereof but free from an alcoholic --OH group, is provided. More particularly, component B may be an amine, preferably a secondary amine, or a phenolic compound.
    Type: Grant
    Filed: April 12, 1991
    Date of Patent: December 28, 1993
    Assignees: Toho Kagaku Kogyo Co., Ltd., State Scientific-Research and Designing Institute for Nitrogen Industry and for Products of Organic Synthesis
    Inventors: Takeshi Hihara, Norio Tagata, Toshimitsu Shimizu, Tetsu Matsuda, Norio Takahashi, Isamu Ueno, Josif L. Leites, Julia G. Carpova, Tatiana V. Zhitkova
  • Method of removal of acid components from a gas
    Patent number: 5066314
    Abstract: Method to remove acid components from a gas including to absorb those with an organic absorbent based on ethers of polyglycols at an elevated pressure followed by regeneration of the saturated absorbent and by dehydration of a part of the regenerated absorbent by heating, which is characterized in that the dehydration of the absorbent is carried out by the combination of stripping with a gas and heating at the temperature lower than the boiling point at 0.8 to 1.3 atm. by 80.degree. to 150.degree. C.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: November 19, 1991
    Assignees: State Scientific-Research Designing Institute for Nitrogen Industry and for Products of Organic Synthesis, Toho Kagaku Kogyo Co., Ltd
    Inventors: Iosif L. Leites, Yulya G. Karpova, Vladimir M. Berchenko, Takeshi Hihara, Toshimitsu Shimizu, Norio Takahashi, Isamu Ueno