Patents Assigned to Kiram AB
  • Patent number: 11149221
    Abstract: The present invention is directed to a process for the production of a syngas suited for further conversion to fine chemicals and/or automotive fuels from biomass by a thermochemical process conducted in a several steps procedure, said process comprising; a) Providing a stream of biomass material; b) Providing an aqueous alkaline catalyst stream comprising sodium and/or potassium compounds; c) Mixing comminuted biomass and alkaline catalyst and optional additives to form an alkaline biomass slurry or suspension; d) Treating alkaline biomass slurry or suspension in a hydrothermal treatment reactor at a temperature in the range of 200-400° C.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: October 19, 2021
    Assignee: KIRAM AB
    Inventors: Erik Furusjö, Kentaro Umeki, Rikard Gebart, Lars Stigsson
  • Patent number: 8617354
    Abstract: Provided is a process for manufacturing shaped cellulose materials from lignocellulose where a dissolving grade pulp is manufactured and dissolved in an aqueous alkaline or acidic solvent system forming a solution suitable for shaping new cellulose structures including fibers, films and cellulose derivatives. At least a part of the spent cellulose dissolving or cellulose shaping chemicals are recovered in one or more unit operations in a pulp mill chemical recovery cycle.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: December 31, 2013
    Assignee: Kiram AB
    Inventor: Lars Stigsson
  • Publication number: 20120000621
    Abstract: Provided is a process for manufacturing shaped cellulose materials from lignocellulose where a dissolving grade pulp is manufactured and dissolved in an aqueous alkaline or acidic solvent system forming a solution suitable for shaping new cellulose structures including fibers, films and cellulose derivatives. At least a part of the spent cellulose dissolving or cellulose shaping chemicals are recovered in one or more unit operations in a pulp mill chemical recovery cycle.
    Type: Application
    Filed: March 8, 2010
    Publication date: January 5, 2012
    Applicant: KIRAM AB
    Inventor: Lars Stigsson
  • Publication number: 20090217573
    Abstract: There is disclosed a method for manufacturing fatty acid alkyl esters from tall oil comprising the steps of a) esterifying tall oil in at least one esterification reactor in the presence of an acidic catalyst and an C1 to C8 alcohol to form a crude product stream comprising fatty acid alkyl esters and H2O, b) separating H2O and alcohol from the crude product stream formed in step a) to form a dehydrated fatty acid alkyl ester product stream, and c) separating dehydrated fatty acid alkyl ester product stream from step b) into at least two product streams wherein one product stream is enriched in fatty acid alkyl esters and one product stream is enriched in resin acid compounds. There are disclosed fatty acid alkyl esters and resin acids manufactured by the method. Moreover there is disclosed a fuel composition and its use as an automotive fuel, said fuel composition comprises the fatty acid alkyl esters produced according to the present invention.
    Type: Application
    Filed: October 19, 2006
    Publication date: September 3, 2009
    Applicant: Kiram AB
    Inventor: Lars Stigsson
  • Patent number: 6946057
    Abstract: The present invention relates to a new and environmentally sound process for the manufacturing of a chemical pulp from lignocellulosic material with an integrated recovery system for recovery of pulping chemicals. The process is carried out in several stages involving a pre-treatment stage followed by one or more delignification stages using an alkaline buffer solution comprising alkali metaborate and sodium carbonate as major components. The alkaline components of the pulping liquor are recovered from a chemicals recovery furnace and at least a portion of the alkali is recycled and used for delignification without any prior reactions with lime or calcium compounds for generation of alkali hydroxide. A quinone based delignification catalyst may be added to be present during delignification.
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: September 20, 2005
    Assignee: Kiram AB
    Inventor: Lars Stigsson
  • Patent number: 6770168
    Abstract: A substantially sulfur free process for the manufacturing of a chemical pulp with an integrated recovery system for recovery of pulping chemicals is carried out on in several stages involving physical and chemical treatment of lignocellulosic material in order to increase accessibility of the lignocellulosic material to reactions with an oxygen-based delignification agent. Spent cellulose liquor comprising lignin components and spent chemical reagents is fully or partially oxidized in a gas generator wherein a stream of hot raw gas and a stream of alkaline chemicals and chemical reagents is formed for subsequent recycle and reuse in the pulp manufacturing process.
    Type: Grant
    Filed: August 14, 2001
    Date of Patent: August 3, 2004
    Assignee: Kiram AB
    Inventor: Lars Stigsson