Patents by Inventor Juha Anttila

Juha Anttila 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 Preparing a Sugar Product
    Publication number: 20100240112
    Abstract: The invention relates to a method for producing sugars, such as glucose, by fractionating lignocellulose-containing biomass. The sugar product thus obtained is useful for the manufacture of bioethanol and other chemicals.
    Type: Application
    Filed: November 7, 2008
    Publication date: September 23, 2010
    Inventors: Juha Anttila, Juha Tanskanen, Pasi Rousu, Päivi Rousu, Keijo Hytönen
  • Process for producing pulp
    Patent number: 7097738
    Abstract: The invention relates to a process for producing pulp from a fibre-based raw material using, as the cooking reagent, a solvent mixture which is based on organic acids and also contains furfural. The method is applicable to herbaceous plants, in particular.
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: August 29, 2006
    Assignee: Chempolis Oy
    Inventors: Esa Rousu, Pasi Rousu, Juha Anttila, Päivi Rousu
  • Method for producing furfural, acetic acid and formic acid from spent pulp-cooking liquor
    Patent number: 6955743
    Abstract: The invention relates to a process for recovering and producing chemicals in a pulp production process where organic chemicals, such as formic acid and acetic acid, are used as cooking chemicals. The process of the invention is based on regeneration of cooking acids and formation of additional cooking acids and furfural by evaporating the cooking liquor and then separating acetic acid, formic acid, furfural and water. The separation is preferably carried out by distillation using the furfural formed in the process as a distilling aid in the distillation.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: October 18, 2005
    Assignee: Chempolis Oy
    Inventors: Esa Rousu, Pasi Rousu, Juha Anttila, Juha Tanskanen, Päivi Rousu
  • Process for recovering organic acids from bleaching liquors
    Patent number: 6923888
    Abstract: The invention relates to a process for treating bleaching liquors from pulping processes based on organic acids. The process is characterized in that inorganic acid, such as nitric acid, phosphoric acid and/or sulphuric acid, is added into a bleaching liquor obtained from the bleaching or a stage closely associated with bleaching, whereby organic acids contained in the bleaching liquor are released into the bleaching liquor. The organic acids are then separated from the bleaching liquor and recycled to the cooking stage to be used as cooking chemicals. The nitrogen-, phosphor- and/or sulphur-containing product thereby produced, from which organic acids have been separated, is recovered to be used as a fertilizer or as raw material for a fertilizer.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: August 2, 2005
    Assignee: Chempolis Oy
    Inventors: Pasi Rousu, Päivi Rousu, Esa Rousu, Juha Anttila
  • Process for producing pulp
    Publication number: 20040231810
    Abstract: The invention relates to a process for producing pulp from a fibre-based raw material using, as the cooking reagent, a solvent mixture which is based on organic acids and also contains furfural. The method is applicable to herbaceous plants, in particular.
    Type: Application
    Filed: January 13, 2004
    Publication date: November 25, 2004
    Inventors: Esa Rousu, Pasi Rousu, Juha Anttila, Paivi Rousu
  • Method for producing furfural, acetic acid and formic acid from spent pulp-cooking liquor
    Publication number: 20040040830
    Abstract: The invention relates to a process for recovering and producing chemicals in a pulp production process where organic chemicals, such as formic acid and acetic acid, are used as cooking chemicals. The process of the invention is based on regeneration of cooking acids and formation of additional cooking acids and furfural by evaporating the cooking liquor and then separating acetic acid, formic acid, furfural and water. The separation is preferably carried out by distillation using the furfural formed in the process as a distilling aid in the distillation.
    Type: Application
    Filed: June 27, 2003
    Publication date: March 4, 2004
    Inventors: Esa Rousu, Pasi Rousu, Juha Anttila, Juha Tanskanen, Paivi Rousu
  • Process for recovering organic acids from bleaching liquors
    Publication number: 20030145961
    Abstract: The invention relates to a process for treating bleaching liquors from pulping processes based on organic acids. The process is characterized in that inorganic acid such as nitric acid, phosphoric acid and/or sulphuric acid, is added into a bleaching liquor obtained from the bleaching or a stage closely associated with bleaching, whereby organic acids contained in the bleaching liquor are released into the bleaching liquor. The organic acids are then separated from the bleaching liquor and recycled to the cooking stage to be used as cooking chemicals. The nitrogen-, phosphor- and/or sulphur-containing product thereby produced, from which organic acids have been separated, is recovered to be used as a fertilizer or as raw material for a fertilizer.
    Type: Application
    Filed: November 15, 2002
    Publication date: August 7, 2003
    Inventors: Pasi Rousu, Paivi Rousu, Esa Rousu, Juha Anttila