Patents by Inventor Arto Vainiotalo

Arto Vainiotalo 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 the preparation of a sodium sulphite containing liquor
    Patent number: 4481074
    Abstract: The method relates to a process in the preparation of the cooking liquor for sodium sulphite pulp for carrying out a reaction between sodium bisulphite and sodium bicarbonate and/or sodium carbonate by bringing solutions containing said compounds into contact with each other. The contact between the solution and gas phase takes place in a layer of tower packings. The carbon dioxide produced as a reaction product is allowed to pressurize the reaction vessel a pressure of 1 to 5 bar by restricting the flow escaping from the reaction vessel and by recovering at the same time the carbon dioxide escaping from the reaction vessel at the said pressure in order to use it for carbonation of a solution of green liquor and/or sodium carbonate.
    Type: Grant
    Filed: January 29, 1982
    Date of Patent: November 6, 1984
    Assignee: Rauma-Rapola Oy
    Inventors: Ismo Reilama, Arto Vainiotalo, Illmo Yrjala