SE9500807D0 - Causticization process - Google Patents

Causticization process

Info

Publication number
SE9500807D0
SE9500807D0 SE9500807A SE9500807A SE9500807D0 SE 9500807 D0 SE9500807 D0 SE 9500807D0 SE 9500807 A SE9500807 A SE 9500807A SE 9500807 A SE9500807 A SE 9500807A SE 9500807 D0 SE9500807 D0 SE 9500807D0
Authority
SE
Sweden
Prior art keywords
liquor
gas
calcium carbonate
sepg
sepn
Prior art date
Application number
SE9500807A
Other languages
Swedish (sv)
Other versions
SE9500807L (en
SE521068C2 (en
Inventor
Samuel Ragnegaard
Arne Sjoeberg
Original Assignee
Caustec Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Caustec Ab filed Critical Caustec Ab
Priority to SE9500807A priority Critical patent/SE521068C2/en
Publication of SE9500807D0 publication Critical patent/SE9500807D0/en
Publication of SE9500807L publication Critical patent/SE9500807L/en
Publication of SE521068C2 publication Critical patent/SE521068C2/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0064—Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/04—Regeneration of pulp liquors or effluent waste waters of alkali lye
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Landscapes

  • Separation Using Semi-Permeable Membranes (AREA)
  • Paper (AREA)

Abstract

Causticisation process comprising steps of (1) sepg. green liquor and sludge; (2) reaction between cleaned green liquor and burnt lime; and (3) sepg. white liquor from calcium carbonate. In step (3) at least, sepn. of white liquor is done using overpressure applied above disc or drum filter to form liq. and gas phases. White liquor sepn. takes place in closed system where liquor is sepd. from gas and then gas pressure is increased in compressor before gas is returned to pressurised vessel. At least steps (2) and (3) are carried out at overpressure and this pressure is reduced during ultrafiltration of calcium carbonate to recover reaction heat. Equipment for this process is also claimed. Green liquor is predominantly sodium carbonate and reacts with slaked lime to form calcium carbonate and sodium hydroxide.
SE9500807A 1995-03-06 1995-03-06 Recovery of white liquor for sulphate pulping process SE521068C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9500807A SE521068C2 (en) 1995-03-06 1995-03-06 Recovery of white liquor for sulphate pulping process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9500807A SE521068C2 (en) 1995-03-06 1995-03-06 Recovery of white liquor for sulphate pulping process

Publications (3)

Publication Number Publication Date
SE9500807D0 true SE9500807D0 (en) 1995-03-06
SE9500807L SE9500807L (en) 1995-03-06
SE521068C2 SE521068C2 (en) 2003-09-30

Family

ID=20397458

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9500807A SE521068C2 (en) 1995-03-06 1995-03-06 Recovery of white liquor for sulphate pulping process

Country Status (1)

Country Link
SE (1) SE521068C2 (en)

Also Published As

Publication number Publication date
SE9500807L (en) 1995-03-06
SE521068C2 (en) 2003-09-30

Similar Documents

Publication Publication Date Title
US3639206A (en) Treatment of waste water from alkaline pulping processes
EP1747319B1 (en) Method and device for washing of lime mud
CA2362692A1 (en) Process for the removal of oxalate and/or sulphate from bayer liquors
CA2497677A1 (en) Treatment of spent caustic refinery effluents
JO1973B1 (en) Desulfurization and hydrocarbon quality enhancement process
SE9303034D0 (en) Methods and apparatus for the absorption of hydrogen sulphide
SE9500807L (en) Causticization process
CA2116595A1 (en) Compact Lime Slaker and Method of Slaking Lime
SE9800036D0 (en) Method of separating impurities from lime and lime sludge and a method of causticizing green liquor containing impurities, such as silicon, in two stages
SE9202258D0 (en) ONE-STEP LAYOUT AND CUSTOMIZATION PROCEDURE
US4627888A (en) Causticizing method
MY130886A (en) Apparatus and method for improved hydrate formation and improved efficiency of recovery of expansion agent in processes for expanding tobacco and other agricultural products
ATE178870T1 (en) METHOD FOR COPRODUCING CALCIUM CARBONATE AND SODIUM HYDROXIDE
US4762590A (en) Causticizing process
NO163704C (en) TREATMENT OF LIQUIDS INCLUDED IN THE POWER CUSTOMIZATION PROCESS FOR LATER USE OF CALCIUM CARBONATE.
SE8307153L (en) PROCEDURE FOR TREATMENT OF Lime Sludge, which is produced during the causticization process in sulphate cellulose paper use
WO1994001617A1 (en) Method for filtering a product formed in causticization
US5667633A (en) Method of producing white liquor streams of high and low sulphidity
JPS5637028A (en) Desulfurizing method of exhaust gas
RU2015236C1 (en) Process for regeneration of sulfate digestion waste liquors
CA2163368C (en) Production of white liquor
SE8105886L (en) PROCEDURES FOR THE PREPARATION OF COOKING CHEMICALS FOR CELLULOSE PREPARATION
CA1273758A (en) Causticizing process
SU870537A1 (en) Pulp-bleaching method
RU1806202C (en) Diffusion juice purification method

Legal Events

Date Code Title Description
NUG Patent has lapsed