US2512266A - Process for the desulfation of coagulation baths for the spinning of viscose - Google Patents

Process for the desulfation of coagulation baths for the spinning of viscose Download PDF

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Publication number
US2512266A
US2512266A US761566A US76156647A US2512266A US 2512266 A US2512266 A US 2512266A US 761566 A US761566 A US 761566A US 76156647 A US76156647 A US 76156647A US 2512266 A US2512266 A US 2512266A
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US
United States
Prior art keywords
bath
sulphuric acid
viscose
spinning
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 - Lifetime
Application number
US761566A
Other languages
English (en)
Inventor
Caute Louis
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
Application granted granted Critical
Publication of US2512266A publication Critical patent/US2512266A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the factory has available a refrigerating machine cooling a cold-producing brine to the desired temperature and the brine circulates in the crystallization apparatus of known type.
  • the present invention relates to a process in brine .'refrigerator'.l tobe f preceded by ⁇ V anotherl cooler wherein the coldv is produced by the Water or bythe bath already- 3 which the cooling and the subsequent crystallization of the bath are obtained by placing yas previously, the bath in a space wherein there is found a very high vacuum. But in this process the btaining of the vacuum is entirely different.
  • the principle is known, of the sulphuric acid refrigerating machine wherein the cold is obtained by evaporation of any desired solution under a very high vacuum (the vapour emitted being absorbed by the sulphurifc acid which is diluted owing to this, and which is concentrated later to be reintroduced into the circuit).
  • Fig. 2 shows a plan of apparatus which may be used for the application of the present invention.
  • the bath to be cooled reaches at I I a crystallization apparatus I2 by'expansion under high vacuum of type known in itself and I3 designates the extraction of the bath and of the salt; this crystallizer I2 is connected through the conduit I4 to a sulphuric acid washer I5 wherein circulates the -sulphuric acid fed at I6 and emerging at I'I.
  • the vapour produced by the evaporation of the bath owing to the heat yielded up by its own heat and by the heat'from the crystallization of the sodium sulphate, is absorbed by the sulphuric acid.
  • revalorization has been aiected yof the liberated calories which were unusable when they were 'available at a temperature of 10 C., but which may be used very readily at a temperature of 'Z0-80. They may be used for any desired purpose, for example by absorbing them by a bath circulation, or by a water circulation, in such manner 1as to obtain hot water for which there is always a call in such factories.
  • designates a circulation pump for the sulphuric acid
  • 22 is an extraction Iof the diluted acid
  • 23 a feed of fresh acid
  • 2d a circulation of liquid to be heated in the exchanger 20.
  • the expansion apparatus could likewise be divided into several stages working under increased vacuum without thereby altering the principle.
  • the bath could likewise be partially cooled prior to its final cooling in the installation hereinbefore described.
  • the ejector that is to say, the device extracting the gases incapable of condensation, could be replaced by an apparatus especially for this purpose; -a vacuum pump of any suitable type.
  • a process for the elimination of sodium sulphate from viscose coagulation baths comprising passing the bath containing the sodium sulphate through at least one reduced pressure zone for effecting evaporation and cooling thereof, effecting an absorption of the heat of the vapors due to evaporation by sulphuric acid, maintaining -a reduced pressure in respect to the sulphuric acid, and regaining the heat absorbed by the sulphuric acid for utilization thereof.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
US761566A 1942-08-13 1947-07-17 Process for the desulfation of coagulation baths for the spinning of viscose Expired - Lifetime US2512266A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
US2512266A true US2512266A (en) 1950-06-20

Family

ID=9287482

Family Applications (1)

Application Number Title Priority Date Filing Date
US761566A Expired - Lifetime US2512266A (en) 1942-08-13 1947-07-17 Process for the desulfation of coagulation baths for the spinning of viscose

Country Status (7)

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

Cited By (1)

* 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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1330350A (fr) * 1962-05-08 1963-06-21 Kestner App Evaporateurs Procédé de fabrication de sulfate de soude anhydre à partir de bains de coagulation de viscose
CN108203099B (zh) * 2016-12-19 2023-02-21 临沂大学 一种低品位硼镁矿生产硼酸过程中余热资源综合回收利用的组合式设备
CN112473288B (zh) * 2020-11-25 2022-04-15 赛得利(九江)纤维有限公司 一种酸浴洗涤除尘装置和方法
CN113233478A (zh) * 2021-04-20 2021-08-10 潍坊金鑫化工化纤设备技术开发中心 一种从高湿模量纤维凝固浴中提取高纯度硫酸钠结晶的方法

Citations (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

Patent Citations (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

Cited By (1)

* 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

Also Published As

Publication number Publication date
FR888915A (fr) 1943-12-27
BE461184A (fr) 1900-01-01
CH232575A (fr) 1944-06-15
DE830543C (de) 1952-02-04
FR54218E (fr) 1948-06-25
NL58267C (fr) 1900-01-01
GB614002A (en) 1948-12-08
BE448007A (fr) 1900-01-01

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