GB678462A - Improvements in and relating to the conservation and recovery of chemicals used in viscose spinning baths and processing liquors - Google Patents

Improvements in and relating to the conservation and recovery of chemicals used in viscose spinning baths and processing liquors

Info

Publication number
GB678462A
GB678462A GB6960/50A GB696050A GB678462A GB 678462 A GB678462 A GB 678462A GB 6960/50 A GB6960/50 A GB 6960/50A GB 696050 A GB696050 A GB 696050A GB 678462 A GB678462 A GB 678462A
Authority
GB
United Kingdom
Prior art keywords
caustic soda
solution
zinc
sulphuric acid
liquors
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
GB6960/50A
Inventor
Donald Entwistle
Horace James Hegan
Edwin Holroyd Sharples
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.)
Akzo Nobel UK PLC
Original Assignee
Courtaulds PLC
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 NL76447D priority Critical patent/NL76447C/xx
Priority to BE501990D priority patent/BE501990A/xx
Application filed by Courtaulds PLC filed Critical Courtaulds PLC
Priority to GB6960/50A priority patent/GB678462A/en
Priority to FR1034173D priority patent/FR1034173A/en
Publication of GB678462A publication Critical patent/GB678462A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G9/00—Compounds of zinc
    • C01G9/06—Sulfates
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F13/00—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like
    • D01F13/02—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like of cellulose, cellulose derivatives or proteins
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

Zinc is recovered from viscose processing liquors containing sulphuric acid and a small amount of zinc sulphate, such as are obtained in the process of Specification 467,500 [Group IV] by neutralizing the liquors with caustic soda, lime or chalk to raise the pH to 11-12, precipitating zinc hydroxide with caustic soda solution suitably at above 60 DEG C, and dissolving the hydroxide in sulphuric acid. The solution obtained by pressing alkali cellulose, produced by steeping cellulose in 18 per cent caustic soda, may be used as the caustic soda solution. The process is also applicable to the treatment of waste material from viscose rayon production, and containing zinc hydroxide, calcium sulphate and carbonate, and ferrous and aluminium hydroxides. This is dissolved in dilute sulphuric acid, and the filtered solution oxidized with sodium hypochlorite or sodium bichromate, and then treated with a paste of zinc hydroxide to precipitate iron and aluminium hydroxides. The solution is thereupon treated as above.
GB6960/50A 1950-03-21 1950-03-21 Improvements in and relating to the conservation and recovery of chemicals used in viscose spinning baths and processing liquors Expired GB678462A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL76447D NL76447C (en) 1950-03-21
BE501990D BE501990A (en) 1950-03-21
GB6960/50A GB678462A (en) 1950-03-21 1950-03-21 Improvements in and relating to the conservation and recovery of chemicals used in viscose spinning baths and processing liquors
FR1034173D FR1034173A (en) 1950-03-21 1951-03-20 Process for recovering chemicals used in viscose spinning baths

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6960/50A GB678462A (en) 1950-03-21 1950-03-21 Improvements in and relating to the conservation and recovery of chemicals used in viscose spinning baths and processing liquors

Publications (1)

Publication Number Publication Date
GB678462A true GB678462A (en) 1952-09-03

Family

ID=9823993

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6960/50A Expired GB678462A (en) 1950-03-21 1950-03-21 Improvements in and relating to the conservation and recovery of chemicals used in viscose spinning baths and processing liquors

Country Status (4)

Country Link
BE (1) BE501990A (en)
FR (1) FR1034173A (en)
GB (1) GB678462A (en)
NL (1) NL76447C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2867496A (en) * 1954-01-06 1959-01-06 Courtaulds Ltd Process for the recovery of zinc sulphate from solutions of zinc sulphate and magnesium sulphate
US3985858A (en) 1971-07-02 1976-10-12 Fmc Corporation Treatment of zinc hydroxide slurry and recovery of zinc-containing product therefrom
EP0003862A1 (en) * 1978-02-25 1979-09-05 Akzo N.V. Process for the removal of heavy metals from aqueous liquids
WO2023035288A1 (en) * 2021-09-10 2023-03-16 宜宾丝丽雅股份有限公司 Control method and system suitable for treating viscose waste liquid by means of bipolar membrane in spinning system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1036462B (en) * 1954-06-25 1958-08-14 Kuehnle Ag Process for separating zinc sulfate-free sodium sulfate from used zinc sulfate-containing spinning balls of the viscose-processing synthetic fiber industry
CN114259892A (en) * 2021-12-30 2022-04-01 宜宾丝丽雅股份有限公司 ZnO solution blending process

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2867496A (en) * 1954-01-06 1959-01-06 Courtaulds Ltd Process for the recovery of zinc sulphate from solutions of zinc sulphate and magnesium sulphate
US3985858A (en) 1971-07-02 1976-10-12 Fmc Corporation Treatment of zinc hydroxide slurry and recovery of zinc-containing product therefrom
EP0003862A1 (en) * 1978-02-25 1979-09-05 Akzo N.V. Process for the removal of heavy metals from aqueous liquids
US4338200A (en) * 1978-02-25 1982-07-06 Akzo N.V. Process for the removal of heavy metals from aqueous liquids
WO2023035288A1 (en) * 2021-09-10 2023-03-16 宜宾丝丽雅股份有限公司 Control method and system suitable for treating viscose waste liquid by means of bipolar membrane in spinning system

Also Published As

Publication number Publication date
BE501990A (en) 1900-01-01
NL76447C (en) 1900-01-01
FR1034173A (en) 1953-07-20

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