SE8107247L - PROCEDURE FOR PREPARING SPECIAL CELLULOSA WITH HIGH ALPHAHALITY BY ACID HYDRAULIC COMPREHENSIVE - Google Patents

PROCEDURE FOR PREPARING SPECIAL CELLULOSA WITH HIGH ALPHAHALITY BY ACID HYDRAULIC COMPREHENSIVE

Info

Publication number
SE8107247L
SE8107247L SE8107247A SE8107247A SE8107247L SE 8107247 L SE8107247 L SE 8107247L SE 8107247 A SE8107247 A SE 8107247A SE 8107247 A SE8107247 A SE 8107247A SE 8107247 L SE8107247 L SE 8107247L
Authority
SE
Sweden
Prior art keywords
alphahality
cellulosa
procedure
preparing special
dry matter
Prior art date
Application number
SE8107247A
Other languages
Unknown language ( )
Swedish (sv)
Inventor
B Arhippainen
E Henninen
T Marttala
A Metsevirta
M Nikula
R Panula
Original Assignee
Ahlstroem Oy
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 Ahlstroem Oy filed Critical Ahlstroem Oy
Publication of SE8107247L publication Critical patent/SE8107247L/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13K—SACCHARIDES OBTAINED FROM NATURAL SOURCES OR BY HYDROLYSIS OF NATURALLY OCCURRING DISACCHARIDES, OLIGOSACCHARIDES OR POLYSACCHARIDES
    • C13K1/00—Glucose; Glucose-containing syrups
    • C13K1/02—Glucose; Glucose-containing syrups obtained by saccharification of cellulosic materials
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K10/00—Animal feeding-stuffs
    • A23K10/30—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
    • A23K10/32—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms from hydrolysates of wood or straw
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/26—Multistage processes

Abstract

\\ The process according to the invention is related to the production of high alpha-cellulose pulps suitable for chemical processing and special papers by means of a multistage cook. Steamed chips are prehydrolyzed by using a strong acid, e.g. sulfuric acid, whereby 20 to 30 % of the dry matter of the wood is dissolved under suitable process conditions. The prehydrolysis liquor is removed from the cooker by means of a counter-current wash, whereafter the chips are conveyed to the actual sulfate cook. The hydrolysate is separated with a high dry matter content and efficiently. In addition to this, the process is characterized in that the furfural content of the prehydrolysis liquor is very low, which makes the further processing of the prehydrolysis liquor easier.
SE8107247A 1980-12-08 1981-12-03 PROCEDURE FOR PREPARING SPECIAL CELLULOSA WITH HIGH ALPHAHALITY BY ACID HYDRAULIC COMPREHENSIVE SE8107247L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI803802A FI63267B (en) 1980-12-08 1980-12-08 FOERFARANDE FOER FRAMSTAELLNING AV SPECIALCELLULOSA MED HOEGT ALFATAL GENOM FLERSTEGSKOKNING INNEFATTANDE SYRAFOERHYDROLYS

Publications (1)

Publication Number Publication Date
SE8107247L true SE8107247L (en) 1982-06-09

Family

ID=8513967

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8107247A SE8107247L (en) 1980-12-08 1981-12-03 PROCEDURE FOR PREPARING SPECIAL CELLULOSA WITH HIGH ALPHAHALITY BY ACID HYDRAULIC COMPREHENSIVE

Country Status (5)

Country Link
JP (1) JPS57121688A (en)
CA (1) CA1173602A (en)
FI (1) FI63267B (en)
FR (1) FR2495654B1 (en)
SE (1) SE8107247L (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4436586A (en) * 1982-01-22 1984-03-13 Kamyr, Inc. Method of producing kraft pulp using an acid prehydrolysis and pre-extraction
CN1099501C (en) * 1999-09-21 2003-01-22 中国科学院广州化学研究所 Pulping technology by dissolving eucalyptus
FI123036B (en) 2006-02-10 2012-10-15 Metso Paper Inc Method for recovering hydrolysis products
US9260818B2 (en) * 2007-05-23 2016-02-16 Andritz Inc. Single vessel reactor system for hydrolysis and digestion of wood chips with chemical enhanced wash method
FI121237B (en) 2008-10-21 2010-08-31 Danisco A process for producing xylose and soluble pulp
CA3003581C (en) * 2016-02-16 2023-06-27 Valmet Ab Method for recovering concentrated hydrolysate after hydrolysis of cellulose material
SE1950402A1 (en) * 2019-04-01 2020-10-02 Valmet Oy Method for extracting hemicellulose from lignocellulosic material

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE442623A (en) * 1939-12-13
SE389520B (en) * 1973-09-03 1976-11-08 Kamyr Ab APPARATUS FOR CONTINUOUS EXTRACTION OF HYDROLYSATE FROM FINELY DISTRIBUTED FIBER MATERIAL

Also Published As

Publication number Publication date
FR2495654B1 (en) 1986-07-04
FI803802L (en) 1982-06-09
JPS57121688A (en) 1982-07-29
FR2495654A1 (en) 1982-06-11
FI63267B (en) 1983-01-31
CA1173602A (en) 1984-09-04

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