Patents by Inventor Elias Suokas

Elias Suokas 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 of selective desulfonation
    Patent number: 5741954
    Abstract: This invention relates to a process for the preparation of m-alkylphenols, particularly of 3-ethylphenol, from the mixture of alkylbenzenesulfonic acid isomers by selective desulfonation, removal of formed alkylbenzene and caustic fusion. In the present invention the inventive desulfonation is accomplished by addition of steam to the mixture of sulfonic acid in an excess in relation to the amount of evaporable water, simultaneously maintaining the temperature of the mixture above 160.degree. C. until the desired purity of isomers is obtained, and until the content of the sulfuric acid in the mixture is decreased below 40%.
    Type: Grant
    Filed: July 19, 1995
    Date of Patent: April 21, 1998
    Assignee: Kemira Agro Oy
    Inventors: Elias Suokas, Markku Niemi, Pekka Somersalo, Jouko Kujala
  • Method for preparing 4-alkyl-2-hydroxy-3,5-dichlorobenzene sulphonic acids
    Patent number: 5684183
    Abstract: The invention is related to a method for preparing 4-alkyl-2-hydroxy-3,5-dichlorobenzene sulphonic acids by sulphonating 4-chloro-3-alkylphenol and by chlorinating 4-alkyl-2-hydroxy-5-chlorobenzene sulphonic acid present in an acidic reaction mixture. According to the invention, chlorination is carried out by adding, to the acidic reaction mixture, salts of hypochlorous and/or chloric acids and, when needed, hydrochloric acid or its salt.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: November 4, 1997
    Inventors: Ari Lokio, Markku Niemi, Elias Suokas
  • Method for producing hydrogen peroxide and solvent system for use in the hydrogen peroxide production process
    Patent number: 5114701
    Abstract: The invention concerns a method for producing hydrogen peroxide using a process based on anthraquinone derivatives. According to the invention the solvent system of the working solution in said process contains carbamate having a general formula ##STR1## where groups R.sup.1 and R.sup.2, which can be the same or different ones, are a hydrogen atom or a hydrocarbon group and R.sup.3 is a hydrocarbon group,whereby the groups R.sup.1, R.sup.2 and R.sup.3 can optionally be part of a cyclic structure and/or substituted by groups which are inert to the process.
    Type: Grant
    Filed: August 22, 1990
    Date of Patent: May 19, 1992
    Assignee: Kemira OY
    Inventors: Elias Suokas, Reijo Aksela
  • Method for converting vegetable material into chemicals
    Patent number: 4732708
    Abstract: The invention relates to a method for converting biopolyesters consisting of straight-chain hydroxyacid monomers containing 10 to 40 carbon atoms, such as suberin and cutin, into a plain mixture of organic acids and their salts containing only a few main components. The depolymerization is carried out according to the invention by oxidizing either with a strong oxidizer or by dehydrating oxidation with strong alkali at elevated temperature.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: March 22, 1988
    Assignee: Kemira Oy
    Inventors: Rainer Ekman, Christer Eckerman, Tapio Mattila, Elias Suokas