GB614002A - Improvements in and relating to a process for the desulphation of coagulation baths for the spinning of viscose - Google Patents

Improvements in and relating to a process for the desulphation of coagulation baths for the spinning of viscose

Info

Publication number
GB614002A
GB614002A GB385/46A GB38546A GB614002A GB 614002 A GB614002 A GB 614002A GB 385/46 A GB385/46 A GB 385/46A GB 38546 A GB38546 A GB 38546A GB 614002 A GB614002 A GB 614002A
Authority
GB
United Kingdom
Prior art keywords
bath
vapours
acid
crystallization
sulphuric acid
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
GB385/46A
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.)
Appareils et Evaporateurs Kestner SA
Original Assignee
Appareils et Evaporateurs Kestner SA
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 Appareils et Evaporateurs Kestner SA filed Critical Appareils et Evaporateurs Kestner SA
Publication of GB614002A publication Critical patent/GB614002A/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
    • C01G3/00—Compounds of copper
    • C01G3/10—Sulfates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0018—Evaporation of components of the mixture to be separated
    • B01D9/0022—Evaporation of components of the mixture to be separated by reducing pressure
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/69—Sulfur trioxide; Sulfuric acid
    • C01B17/90—Separation; Purification
    • C01B17/901—Recovery from spent acids containing metallic ions, e.g. hydrolysis acids, pickling acids
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/26—Phosphates
    • C01B25/30—Alkali metal phosphates
    • C01B25/301—Preparation from liquid orthophosphoric acid or from an acid solution or suspension of orthophosphates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
    • C01D5/006—Recovery of sodium sulfate from coagulation baths for the spinning of viscose
    • 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)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

Viscose spinning baths are subjected to vaporization at low temperature under high vacuum to effect crystallization of the sodium sulphate, and the vapours so produced are absorbed in sulphuric acid of desired concentration conducted in circulation. The heat liberated is absorbed in the sulphuric acid and utilized by passage of the acid through a heat exchanger. The bath to be cooled is fed at 11, Fig. 2, to a crystallization apparatus 12 operating under high vacuum, the extraction of the salt and bath being effected at 13. A pipe 14 connects the crystallizer with a sulphuric acid washing-apparatus 15 through which the acid p circulates, absorbing both the vapours produced <PICT:0614002/IV(a)/1> by the evaporation of the bath and the heat liberated during the crystallization. Thus, the vacuum-producing ejector 18 conveys only those vapours incapable of condensation. Steam is supplied to the ejector at 19. The acid after absorbing the vapours &c. is passed to a heat exchanger 20, other liquids in the circulation system 24 being heated. The bath may be cooled prior to its final cooling in the system, and, if desired, the vaporization apparatus may be divided into a plurality of stages, each working at a higher vacuum.
GB385/46A 1942-08-13 1946-01-04 Improvements in and relating to a process for the desulphation of coagulation baths for the spinning of viscose Expired GB614002A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR830543X 1942-08-13

Publications (1)

Publication Number Publication Date
GB614002A true GB614002A (en) 1948-12-08

Family

ID=9287482

Family Applications (1)

Application Number Title Priority Date Filing Date
GB385/46A Expired GB614002A (en) 1942-08-13 1946-01-04 Improvements in and relating to a process for the desulphation of coagulation baths for the spinning of viscose

Country Status (7)

Country Link
US (1) US2512266A (en)
BE (2) BE448007A (en)
CH (1) CH232575A (en)
DE (1) DE830543C (en)
FR (2) FR888915A (en)
GB (1) GB614002A (en)
NL (1) NL58267C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758910A (en) * 1953-06-15 1956-08-14 American Viscose Corp Removing gaseous materials from liquid
FR1330350A (en) * 1962-05-08 1963-06-21 Kestner App Evaporateurs Process for the production of anhydrous sodium sulphate from viscose coagulation baths
CN108203099B (en) * 2016-12-19 2023-02-21 临沂大学 Combined equipment for comprehensively recycling waste heat resources in process of producing boric acid from low-grade boron magnesium ore
CN112473288B (en) * 2020-11-25 2022-04-15 赛得利(九江)纤维有限公司 Acid bath washing dust removal device and method
CN113233478A (en) * 2021-04-20 2021-08-10 潍坊金鑫化工化纤设备技术开发中心 Method for extracting high-purity sodium sulfate crystals from high-wet-modulus fiber coagulation bath

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1873329A (en) * 1929-07-12 1932-08-23 American Potash & Chem Corp Process of evaporative cooling
US2409624A (en) * 1943-07-20 1946-10-22 Granville Bernard Apparatus for extracting water from atmospheric air

Also Published As

Publication number Publication date
DE830543C (en) 1952-02-04
US2512266A (en) 1950-06-20
FR888915A (en) 1943-12-27
NL58267C (en) 1900-01-01
CH232575A (en) 1944-06-15
FR54218E (en) 1948-06-25
BE461184A (en) 1900-01-01
BE448007A (en) 1900-01-01

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