Patents by Inventor Evgenia S. Ostrovlyanchik

Evgenia S. Ostrovlyanchik has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for desilication of aluminate solution
    Patent number: 4455284
    Abstract: The present invention relates to the production of alumina and, more specifically, to a process for desilication of aluminate solutions.The process of desilication according to the present invention comprises treatment of the aluminate solution first with a calcium-containing reagent "a" which is a product of the reaction of desilication of the aluminate solution; reagent "a" contains mainly calcium hydrogarnet of the formula:3CaO.Al.sub.2 O.sub.3.nSiO.sub.2 (6-2n)H.sub.2 Owherein n.ltoreq.1, and then with a reagent "b" of the formula:4CaO.Al.sub.2 O.sub.3 (0.1-0.6)X.mH.sub.2 Owherein X is CO.sub.2 and/or SO.sub.3 ; m=8 to 15. The treatment of the aluminate solution with reagent "a" is carried out for 0.5 to 2 hours at a temperature ranging from 40.degree. to 105.degree. C. Weight ratio of reagents "a" and "b" is maintained within the range of from 1:1 to 3:1.The process according to the present invention is useful in the manufacture of alumina.
    Type: Grant
    Filed: January 18, 1983
    Date of Patent: June 19, 1984
    Assignee: Vsesojuzny Nauchnoissledovatelsky I Proektny Institut Aljuminievoi, Magnievoi I Elektrodnoi Promyshlennosti
    Inventors: Viktor M. Sizyakov, Nikolai A. Kaluzhsky, Khoren A. Badaiants, Ivan M. Kostin, Isaak A. Zatulovsky, Evgeny A. Isakov, Zarya N. Alexandrova, Valentin N. Afanasiev, Vinetsy I. Chernov, Alexandr G. Zhukov, Viktor S. Kutsenko, Galina M. Vysotskaya, Evgenia S. Ostrovlyanchik, Evgeny I. Mironov, Pavel S. Vladimirov, Alexei I. Alexeev, Leonid I. Finkelshtein, deceased, Nina J. Finkelshtein, administrator, Julia L. Finkelshtein, administrator