FR2369379A1 - Drying (fibrous) unrefined cellulose materials - with addn. of synthetic fibre-forming polymer prior to drying - Google Patents

Drying (fibrous) unrefined cellulose materials - with addn. of synthetic fibre-forming polymer prior to drying

Info

Publication number
FR2369379A1
FR2369379A1 FR7732270A FR7732270A FR2369379A1 FR 2369379 A1 FR2369379 A1 FR 2369379A1 FR 7732270 A FR7732270 A FR 7732270A FR 7732270 A FR7732270 A FR 7732270A FR 2369379 A1 FR2369379 A1 FR 2369379A1
Authority
FR
France
Prior art keywords
drying
cellulose
forming polymer
synthetic fibre
fibrous
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.)
Withdrawn
Application number
FR7732270A
Other languages
French (fr)
Inventor
Luigi Torti
Paolo Parrini
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.)
Montedison SpA
Original Assignee
Montedison SpA
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 Montedison SpA filed Critical Montedison SpA
Publication of FR2369379A1 publication Critical patent/FR2369379A1/en
Withdrawn legal-status Critical Current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
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp

Abstract

Sheets of essentially unrefined cellulose or fibrous materials contg. cellulose can be dried by evapn. of the liq. phase present. Before drying, 1-15% (by wt. of dry material) of fibrils or fibrids of a synthetic fibre-forming polymer of surface area >1 m2/g is added to the cellulose paste. The method is esp. useful for dealing with wood paste or a semi-chemical cellulose paste. It increases the speed fo drying of these materials by up to 50%, compared with existing methods, thus reducing considerably the energy consumption and therefore the cost of this part of the cellulose extraction process. The fibrils do not modify the properties of the cellulose.
FR7732270A 1976-10-28 1977-10-26 Drying (fibrous) unrefined cellulose materials - with addn. of synthetic fibre-forming polymer prior to drying Withdrawn FR2369379A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT28788/76A IT1068428B (en) 1976-10-28 1976-10-28 IMPROVEMENTS IN THE DRYING PROCESS OF CELLULOSE OR OF FIBROUS MATERIALS CONTAINING CELLULOSE

Publications (1)

Publication Number Publication Date
FR2369379A1 true FR2369379A1 (en) 1978-05-26

Family

ID=11224181

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7732270A Withdrawn FR2369379A1 (en) 1976-10-28 1977-10-26 Drying (fibrous) unrefined cellulose materials - with addn. of synthetic fibre-forming polymer prior to drying

Country Status (9)

Country Link
JP (1) JPS5358011A (en)
BE (1) BE860163A (en)
DE (1) DE2748476A1 (en)
DK (1) DK471977A (en)
FI (1) FI773158A (en)
FR (1) FR2369379A1 (en)
IT (1) IT1068428B (en)
NL (1) NL7711650A (en)
NO (1) NO773624L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2513421A1 (en) * 1981-09-18 1983-03-25 Victor Company Of Japan DEVICE FOR SEARCHING THE TRACK OF AN INFORMATION SIGNAL FOR A DEVICE FOR REPRODUCING ROTATING RECORDING MEDIA

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111576074B (en) * 2020-05-25 2022-06-14 郑州磊展科技造纸机械有限公司 Multi-disc thickener

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2513421A1 (en) * 1981-09-18 1983-03-25 Victor Company Of Japan DEVICE FOR SEARCHING THE TRACK OF AN INFORMATION SIGNAL FOR A DEVICE FOR REPRODUCING ROTATING RECORDING MEDIA
US4592035A (en) * 1981-09-18 1986-05-27 Victor Company Of Japan, Ltd. Information signal track search system in a rotary recording medium reproducing apparatus

Also Published As

Publication number Publication date
NL7711650A (en) 1978-05-03
IT1068428B (en) 1985-03-21
DK471977A (en) 1978-04-29
NO773624L (en) 1978-05-02
FI773158A (en) 1978-04-29
BE860163A (en) 1978-04-27
JPS5358011A (en) 1978-05-25
DE2748476A1 (en) 1978-05-03

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Legal Events

Date Code Title Description
RE Withdrawal of published application