ES403376A1 - Prehydrolysis and digestion of bagasse fibers - Google Patents

Prehydrolysis and digestion of bagasse fibers

Info

Publication number
ES403376A1
ES403376A1 ES403376A ES403376A ES403376A1 ES 403376 A1 ES403376 A1 ES 403376A1 ES 403376 A ES403376 A ES 403376A ES 403376 A ES403376 A ES 403376A ES 403376 A1 ES403376 A1 ES 403376A1
Authority
ES
Spain
Prior art keywords
bagasse
weight percent
fibers
alkali metal
original
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
ES403376A
Other languages
Spanish (es)
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.)
Process Evaluation and Development Corp
Original Assignee
Process Evaluation and 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
Application filed by Process Evaluation and Development Corp filed Critical Process Evaluation and Development Corp
Publication of ES403376A1 publication Critical patent/ES403376A1/en
Expired legal-status Critical Current

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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/24—Continuous processes
    • 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
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • D21C3/022—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes in presence of S-containing compounds
    • 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
    • D21C3/222—Use of compounds accelerating the pulping processes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Abstract

A process for producing pulp from bagasse fibers of sugarcane in yields greater than 60 percent, the pulp having a brightness g.e. Greater than 55 and an opacity greater than 90, characterized by (a) prehydrolyzing the core-free bagasse fibers at a ph of 4.5 to 5.8, in the presence of 70 to 100 weight percent moisture, based on the completely dry weight of the fiber feed and under autogenous steam pressures, at temperatures within the range of 171º c, at 188º c, over a period of time sufficient to remove from 40 percent to 60 weight percent of the content pentosan original of bagasse fiber feed; (b) then, raising the ph of the prehydrolyzed fibers to at least 8.5, by the addition of alkali metal silicate or alkali metal bisulfite or mixtures thereof, alone or together with other alkaline chemical digestion materials, which are required to provide the required ph and digest at the alkaline ph and at the same steam pressures and temperatures, for an additional period of time sufficient to reduce the total content of the hemicellulose from the original bagasse fiber feed, up to a scale of 20 to 22 weight percent; and (c) then adding to the slurry, when required, sufficient quantities of an alkali metal silicate to provide a total amount of 0.8 to 1.3 weight percent silicate, based on the completely dry weight of the feeding of original bagasse fiber. (Machine-translation by Google Translate, not legally binding)
ES403376A 1971-06-01 1972-05-31 Prehydrolysis and digestion of bagasse fibers Expired ES403376A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14900071A 1971-06-01 1971-06-01

Publications (1)

Publication Number Publication Date
ES403376A1 true ES403376A1 (en) 1975-04-16

Family

ID=22528372

Family Applications (1)

Application Number Title Priority Date Filing Date
ES403376A Expired ES403376A1 (en) 1971-06-01 1972-05-31 Prehydrolysis and digestion of bagasse fibers

Country Status (8)

Country Link
US (1) US3738908A (en)
JP (1) JPS5539678B1 (en)
AU (2) AU474222B2 (en)
BR (2) BR7203416D0 (en)
EG (1) EG10779A (en)
ES (1) ES403376A1 (en)
FR (1) FR2154407B1 (en)
PH (1) PH9628A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923591A (en) * 1972-03-21 1975-12-02 Process Evaluation Devel Prehydrolysis and digestion of fibrous lignocellulosic material
ZA75370B (en) * 1974-02-15 1976-01-28 H Funk Method of treating bagasse
US4199399A (en) * 1976-04-19 1980-04-22 Process Evaluation & Development Corp. Method for preparing bagasse dissolving pulps and producing rayon having a degree of polymerization of at least 800 therefrom
AU7782181A (en) * 1980-11-25 1982-06-03 Australian Paper Manufacturers Limited Oxidisation of spent pulp liquor
AT387408B (en) * 1987-05-12 1989-01-25 Voest Alpine Ind Anlagen COMBINED METHOD FOR THE THERMAL AND CHEMICAL TREATMENT OF BIOMASS CONTAINING LIGNOCELLULOSE AND FOR THE EXTRACTION OF FURFURAL
AT387247B (en) * 1987-05-12 1988-12-27 Voest Alpine Ind Anlagen COMBINED PROCESS FOR THE THERMAL AND CHEMICAL TREATMENT OF BIOMASS CONTAINING LIGNOCELLULOSE AND FOR THE EXTRACTION OF FURFURAL

Also Published As

Publication number Publication date
AU475331B2 (en) 1976-08-19
BR7203416D0 (en) 1973-07-19
FR2154407B1 (en) 1974-01-04
US3738908A (en) 1973-06-12
AU4251072A (en) 1973-11-22
AU474222B2 (en) 1976-07-15
PH9628A (en) 1976-01-20
JPS5539678B1 (en) 1980-10-13
EG10779A (en) 1976-05-31
AU4245072A (en) 1973-11-22
FR2154407A1 (en) 1973-05-11
BR7203417D0 (en) 1973-07-19

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