TREA

Combination of various pulping processes with one or several recovery systems (cross-recovery)

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Industry

  • CPC
  • D21C11/0014
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Parent Industries

DTEXTILES PAPER D21Papermaking D21CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS APPARATUS THEREFOR D21C11/00Regeneration of pulp liquors or effluent waste waters

Current Industry

D21C11/0014Combination of various pulping processes with one or several recovery systems (cross-recovery)
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Method and a system for adjusting S/Na-balance of a pulp mill
    • Patent number 11,634,864
    • Issue date Apr 25, 2023
    • VALMET TECHNOLOGIES OY
    • Risto Hämäläinen
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Method and a system for adjusting S/Na-balance of a pulp mill
    • Patent number 11,619,000
    • Issue date Apr 4, 2023
    • VALMET TECHNOLOGIES OY
    • Risto Hämäläinen
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Use of fly ash in biological process of wastewater treatment systems
    • Patent number 10,619,300
    • Issue date Apr 14, 2020
    • Lakehead University
    • Pedram Fatehi
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    BCTMP filtrate recycling system and method
    • Patent number 8,999,114
    • Issue date Apr 7, 2015
    • International Paper Company
    • Caifang F. Yin
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Method to use heat energy from black liquor
    • Patent number 8,545,674
    • Issue date Oct 1, 2013
    • Metso Paper Sweden AB
    • Vidar Snekkenes
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Black liquor treatment method
    • Patent number 7,713,422
    • Issue date May 11, 2010
    • K.I. System Co., Ltd.
    • Sadao Kitagawa
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Method for producing furfural, acetic acid and formic acid from spe...
    • Patent number 6,955,743
    • Issue date Oct 18, 2005
    • Chempolis Oy
    • Esa Rousu
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Process of producing sodium hydroxide from sodium sulphate in a pul...
    • Patent number 5,702,570
    • Issue date Dec 30, 1997
    • Thor Technology Corporation
    • James W. Smith
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Method for the treatment of spent liquors in pulp production
    • Patent number 5,022,962
    • Issue date Jun 11, 1991
    • Enso-Gutzeit OY
    • Olli Korhonen
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Method for purifying resin-containing waste liquor in the manufactu...
    • Patent number 4,921,613
    • Issue date May 1, 1990
    • Boliden Aktiebolag
    • Cecilia M. Nordberg
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Kraft mill recycle process
    • Patent number 4,288,286
    • Issue date Sep 8, 1981
    • Hooker Chemicals & Plastics Corp.
    • Willard A. Fuller
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Method for combusting a mixture of spent magnesium sulphite digesti...
    • Patent number 4,227,966
    • Issue date Oct 14, 1980
    • Sunds Aktiebolag
    • Lennart Ivnas
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Recovery system for oxygen bleaching of pulp
    • Patent number 4,131,508
    • Issue date Dec 26, 1978
    • Kamyr Inc.
    • Oliver A. Laakso
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Method for the preparation of a pulp
    • Patent number 4,118,271
    • Issue date Oct 3, 1978
    • Jujo Paper Co., Ltd.
    • Kyoichi Oku
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    High yield semichemical wood pulping process
    • Patent number 4,073,678
    • Issue date Feb 14, 1978
    • Westvaco Corporation
    • Jack A. Hammond
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Process of the pulping of bleaching of vegetable material
    • Patent number 4,070,233
    • Issue date Jan 24, 1978
    • Japan Pulp & Paper Research Instutute Inc.
    • Hiroshi Matsuura
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    3598695
    • Patent number 3,598,695
    • Issue date Aug 10, 1971
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    3210236
    • Patent number 3,210,236
    • Issue date Oct 5, 1965
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    3055793
    • Patent number 3,055,793
    • Issue date Sep 25, 1962
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    3003908
    • Patent number 3,003,908
    • Issue date Oct 10, 1961
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2974081
    • Patent number 2,974,081
    • Issue date Mar 7, 1961
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2974084
    • Patent number 2,974,084
    • Issue date Mar 7, 1961
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    2913310
    • Patent number 2,913,310
    • Issue date Nov 17, 1959
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2823120
    • Patent number 2,823,120
    • Issue date Feb 11, 1958
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2738270
    • Patent number 2,738,270
    • Issue date Mar 13, 1956
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2734037
    • Patent number 2,734,037
    • Issue date Feb 7, 1956
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2730445
    • Patent number 2,730,445
    • Issue date Jan 10, 1956
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2642399
    • Patent number 2,642,399
    • Issue date Jun 16, 1953
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2047032
    • Patent number 2,047,032
    • Issue date Jul 7, 1936
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2041666
    • Patent number 2,041,666
    • Issue date May 19, 1936
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE

Patents Applicationslast 30 patents