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GB1417388A - Coking of waste alkaline sulphite pulp liquor at lowered ph - Google Patents

Coking of waste alkaline sulphite pulp liquor at lowered ph

Info

Publication number
GB1417388A
GB1417388A GB3816174A GB3816174A GB1417388A GB 1417388 A GB1417388 A GB 1417388A GB 3816174 A GB3816174 A GB 3816174A GB 3816174 A GB3816174 A GB 3816174A GB 1417388 A GB1417388 A GB 1417388A
Authority
GB
United Kingdom
Prior art keywords
coking
lowered
liquors
sulphite pulp
pulp liquor
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB3816174A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Texaco Development Corp
Original Assignee
Texaco Development Corp
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
Priority to US00149425A priority Critical patent/US3836427A/en
Application filed by Texaco Development Corp filed Critical Texaco Development Corp
Priority to GB3816174A priority patent/GB1417388A/en
Publication of GB1417388A publication Critical patent/GB1417388A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/025—Thermal hydrolysis
    • 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
    • D21C11/02—Regeneration of pulp liquors or effluent waste waters of acid, neutral or alkaline sulfite lye
    • 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
    • D21C11/12—Combustion of pulp liquors
    • D21C11/14—Wet combustion ; Treatment of pulp liquors without previous evaporation, by oxidation of the liquors remaining at least partially in the liquid phase, e.g. by application or pressure
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S423/00—Chemistry of inorganic compounds
    • Y10S423/03—Papermaking liquor

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Paper (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

1417388 Treating alkaline sulfite waste pulping liquors TEXACO DEVELOPMENT CORP 31 Aug 1974 38161/74 Heading D2W A process for treating alkaline sulfite waste pulping liquors comprises coking the liquors in the liquid phase under autogeneous pressure so as to form coke, gases, and an aqueous effluent, the pH of the liquors being lowered by at least one pH unit prior to coking by the addition of SO 2 , separating the coke from the effluent, and recovering the latter to form additional pulping liquor.
GB3816174A 1971-06-03 1974-08-31 Coking of waste alkaline sulphite pulp liquor at lowered ph Expired GB1417388A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US00149425A US3836427A (en) 1971-06-03 1971-06-03 COKING OF WASTE ALKALINE SULFITE PULP LIQUOR AT LOWERED pH
GB3816174A GB1417388A (en) 1971-06-03 1974-08-31 Coking of waste alkaline sulphite pulp liquor at lowered ph

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US00149425A US3836427A (en) 1971-06-03 1971-06-03 COKING OF WASTE ALKALINE SULFITE PULP LIQUOR AT LOWERED pH
GB3816174A GB1417388A (en) 1971-06-03 1974-08-31 Coking of waste alkaline sulphite pulp liquor at lowered ph

Publications (1)

Publication Number Publication Date
GB1417388A true GB1417388A (en) 1975-12-10

Family

ID=32964155

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3816174A Expired GB1417388A (en) 1971-06-03 1974-08-31 Coking of waste alkaline sulphite pulp liquor at lowered ph

Country Status (2)

Country Link
US (1) US3836427A (en)
GB (1) GB1417388A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944462A (en) * 1971-06-03 1976-03-16 Texaco Inc. Coking of waste kraft pulping liquors at lowered pH

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA847218A (en) * 1970-07-21 V. Ingruber Otto Alkaline sulfite pulping
GB1054239A (en) * 1964-11-13
US3558426A (en) * 1968-11-29 1971-01-26 Texaco Inc Treatment of waste liquors from pulp and paper mills
US3649534A (en) * 1970-05-15 1972-03-14 Du Pont Wet oxidation of acidified activated sludge

Also Published As

Publication number Publication date
US3836427A (en) 1974-09-17

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee