JPS6477693A - Deposite preventing method in old paper deinking and washing process - Google Patents

Deposite preventing method in old paper deinking and washing process

Info

Publication number
JPS6477693A
JPS6477693A JP22802687A JP22802687A JPS6477693A JP S6477693 A JPS6477693 A JP S6477693A JP 22802687 A JP22802687 A JP 22802687A JP 22802687 A JP22802687 A JP 22802687A JP S6477693 A JPS6477693 A JP S6477693A
Authority
JP
Japan
Prior art keywords
washing process
pulp
deposite
preventing method
inlet
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.)
Granted
Application number
JP22802687A
Other languages
Japanese (ja)
Other versions
JP2526924B2 (en
Inventor
Koji Kiuchi
Akio Hashimoto
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.)
Kurita Water Industries Ltd
Original Assignee
Kurita Water Industries Ltd
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 Kurita Water Industries Ltd filed Critical Kurita Water Industries Ltd
Priority to JP22802687A priority Critical patent/JP2526924B2/en
Publication of JPS6477693A publication Critical patent/JPS6477693A/en
Application granted granted Critical
Publication of JP2526924B2 publication Critical patent/JP2526924B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Abstract

PURPOSE: To prevent deposits in a process for washing pulp with water after a deinking process by adding a phosphonic acid or its salt to a pulp dispersion in the water washing process after the waste paper-deinking process. CONSTITUTION: A phosphonic acid or its salt is added to a pulp dispersion in a water washing process in a concentration of 0. 05-5 mg/L, preferably 0.1-4 mg/L. Addition places are suitably the inlet of a screen 5, the inlet of an inclined screen 6, the inlet of an extractor 7, the shower water of the extractor 7, etc. Thereby, the deposits are not by-produced, and the deposits contaminate the deinked pulp to improve the whiteness of the deinked pulp.
JP22802687A 1987-09-11 1987-09-11 A method to prevent deposits in the deinking process of waste paper Expired - Fee Related JP2526924B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22802687A JP2526924B2 (en) 1987-09-11 1987-09-11 A method to prevent deposits in the deinking process of waste paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22802687A JP2526924B2 (en) 1987-09-11 1987-09-11 A method to prevent deposits in the deinking process of waste paper

Publications (2)

Publication Number Publication Date
JPS6477693A true JPS6477693A (en) 1989-03-23
JP2526924B2 JP2526924B2 (en) 1996-08-21

Family

ID=16870033

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22802687A Expired - Fee Related JP2526924B2 (en) 1987-09-11 1987-09-11 A method to prevent deposits in the deinking process of waste paper

Country Status (1)

Country Link
JP (1) JP2526924B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11241286A (en) * 1998-02-24 1999-09-07 Hakuto Co Ltd Inhibition of scale in process for bleaching pulp

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS591793A (en) * 1982-06-28 1984-01-07 栗田工業株式会社 Pitch adhesion preventing agent for papermaking

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS591793A (en) * 1982-06-28 1984-01-07 栗田工業株式会社 Pitch adhesion preventing agent for papermaking

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11241286A (en) * 1998-02-24 1999-09-07 Hakuto Co Ltd Inhibition of scale in process for bleaching pulp

Also Published As

Publication number Publication date
JP2526924B2 (en) 1996-08-21

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Legal Events

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LAPS Cancellation because of no payment of annual fees