GB646111A - Process for producing anhydrous sodium sulphate from glauber's salt - Google Patents

Process for producing anhydrous sodium sulphate from glauber's salt

Info

Publication number
GB646111A
GB646111A GB17869/48A GB1786948A GB646111A GB 646111 A GB646111 A GB 646111A GB 17869/48 A GB17869/48 A GB 17869/48A GB 1786948 A GB1786948 A GB 1786948A GB 646111 A GB646111 A GB 646111A
Authority
GB
United Kingdom
Prior art keywords
glauber
salt
sodium sulphate
zone
solution
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
GB17869/48A
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 BE489948D priority Critical patent/BE489948A/xx
Priority to NL70236D priority patent/NL70236C/xx
Application filed by Courtaulds PLC filed Critical Courtaulds PLC
Priority to GB17869/48A priority patent/GB646111A/en
Priority to US97414A priority patent/US2592139A/en
Priority to DEP45518A priority patent/DE853937C/en
Priority to FR990016D priority patent/FR990016A/en
Publication of GB646111A publication Critical patent/GB646111A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C01D5/18—Dehydration
    • 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)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Anhydrous sodium sulphate is produced from Glauber's salt (Na2SO4.10H2O) by drawing the Glauber's salt through a stream of saturated sodium sulphate solution moving in a direction opposite to that in which the Glauber's salt is drawn, the Glauber's salt being drawn first through a zone of solution of gradually increasing temperature, the maximum temperature of which is the transition temperature of Glauber's salt, i.e. 32.5 DEG C. and then into a heated zone maintained above 32.5 DEG C., wherein the Glauber's salt is decomposed into anhy <PICT:0646111/III/1> <PICT:0646111/III/2> <PICT:0646111/III/3> <PICT:0646111/III/4> <PICT:0646111/III/5> drous sodium sulphate and saturated sodium sulphate solution; this saturated sodium sulphate solution moving towards the coolant zone of the solution and thereby forming said stream. The process is particularly applicable to the recovery and purification of chemicals from viscose rayon spinning baths. In Fig. 1, Glauber's salt 1 is fed from a hopper 2 into a zone A, B of a jacketted tank 3 and is drawn from left to right by means of scrapers 4 oscillated as shown and finally into a heated zone of solution B, C wherein it is decomposed into anhydrous sodium sulphate 8 which is stirred by a stirrer 16 to effect washing and saturated sodium sulphate solution which flows from right to left and finally through pipe 17 to waste. Zone A, B is cooled by water flowing through an inlet pipe 10, a baffled jacket 9 and an outlet pipe 11 and zone B, C is heated by steam pipes 13, the cooling and heating being such that the temperature at B is 32.5 DEG C. and at A is 12-14 DEG C. In Fig. 3 the zone B, C of the tank is shaped so that the crystals are drained before being introduced into a heated decomposition chamber 20, the crystals in zone B, C being agitated by scrapers 18 oscillated as shown. The saturated sodium sulphate solution formed in container 20 is fed back into the tank 3 via a channel 23. In Fig. 4 the tank is formed by a series of intercommunicating tanks 24, the Glauber's salt being propelled by a series of rotating paddles 25. In Fig. 6 the saturated sodium sulphate flows beyond the point where the Glauber's salt is introduced (which may be where the solution is at 20 DEG C.), whereby Glauber's salt crystals are deposited which are moved by scrapers 29 in the same direction as the solution and deposited in a container 30. Fig. 7 shows apparatus for the recovery of anhydrous sodium sulphate from viscose rayon spinning baths. Spinning bath liquor at 40-50 DEG C. is fed via a pipe 33 into a jacketted tank 34, wherein it is cooled so that Glauber's salt (35) is deposited which is drawn up at weir 38, the temperature of which may be 12-14 DEG C. and which is provided with perforations so that the mother liquor drains away down pipe 44 and may, after adjustment of its composition, be returned to the spinning bath. The crystals are drawn from the top of the weir into a counter-current flow of sodium sulphate solution. U.S.A. Specification 2,374,004 and Canadian Specification 314,908 is referred to.
GB17869/48A 1948-07-02 1948-07-02 Process for producing anhydrous sodium sulphate from glauber's salt Expired GB646111A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE489948D BE489948A (en) 1948-07-02
NL70236D NL70236C (en) 1948-07-02
GB17869/48A GB646111A (en) 1948-07-02 1948-07-02 Process for producing anhydrous sodium sulphate from glauber's salt
US97414A US2592139A (en) 1948-07-02 1949-06-06 Continuous process for the production of anhydrous glauber's salt
DEP45518A DE853937C (en) 1948-07-02 1949-06-11 Process and device for the extraction of anhydrous sodium sulfate from raw Glauber's salt crystallized from used viscose spinning balls, optionally with simultaneous recovery of the spinning balls
FR990016D FR990016A (en) 1948-07-02 1949-07-01 Improvements in the recovery and purification of chemicals from viscose spinning baths

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB17869/48A GB646111A (en) 1948-07-02 1948-07-02 Process for producing anhydrous sodium sulphate from glauber's salt

Publications (1)

Publication Number Publication Date
GB646111A true GB646111A (en) 1950-11-15

Family

ID=10102640

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17869/48A Expired GB646111A (en) 1948-07-02 1948-07-02 Process for producing anhydrous sodium sulphate from glauber's salt

Country Status (6)

Country Link
US (1) US2592139A (en)
BE (1) BE489948A (en)
DE (1) DE853937C (en)
FR (1) FR990016A (en)
GB (1) GB646111A (en)
NL (1) NL70236C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111533142A (en) * 2020-06-04 2020-08-14 新疆中泰化学阜康能源有限公司 Circular production method for heating precipitated anhydrous sodium sulphate, cooling, crystallizing and concentrating

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL282796A (en) * 1961-09-07
US4209312A (en) * 1976-07-19 1980-06-24 General Electric Company Controlling size in Glauber's salt crystal formation
IL51692A (en) * 1977-03-18 1981-05-20 Sadan Abraham Process for dehydrating hydrated salts in solar ponds
IL56510A (en) * 1979-01-26 1982-04-30 Solmat Syst Method of utilizing solar ponds for effecting controlled temperature changes of solution

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US400983A (en) * 1889-04-09 Apparatus for the manufacture of salt
US1004858A (en) * 1907-11-11 1911-10-03 Dow Chemical Co Method of producing crystals.
FR518671A (en) * 1918-06-25 1921-05-28 Balcke Ag Maschbau Cooling device for hot saline solutions
DE444048C (en) * 1923-08-29 1927-05-14 Bernhard Young Dr Process for the production of dry sodium sulfate from Glauber's salt in one operation
DE424983C (en) * 1924-10-04 1926-02-10 Waldemar Recha Dipl Ing Process for the continuous production of anhydrous sodium sulfate
DE478987C (en) * 1924-10-04 1929-07-08 Waldemar Recha Dipl Ing Process for the continuous production of dry sodium sulfate from Glauber's salt
US2121208A (en) * 1935-03-30 1938-06-21 American Agricultural Chem Co Production of monocalcium phosphate
GB448007A (en) * 1935-04-26 1936-05-29 Int Paper Co Improvements in or relating to thermal insulation and process of making the same
DE662448C (en) * 1935-10-03 1938-07-13 Zahn & Co G M B H Process for dewatering fusible salts, e.g. B. Glauber's salt, in rotary kilns
DE710373C (en) * 1937-04-13 1941-09-11 I G Farbenindustrie Akt Ges Process for the regeneration of viscose spun balls containing ammonium sulphate and sodium sulphate
US2374004A (en) * 1941-12-02 1945-04-17 American Viscose Corp Glauber's salt conversion
BE452848A (en) * 1942-10-26
US2459302A (en) * 1942-12-10 1949-01-18 American Viscose Corp Concentration of salts having minimum solubilities at temperatures above those of the initial solutions
US2504097A (en) * 1948-08-30 1950-04-11 West End Chemical Company Process for producing anhydrous sodium sulfate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111533142A (en) * 2020-06-04 2020-08-14 新疆中泰化学阜康能源有限公司 Circular production method for heating precipitated anhydrous sodium sulphate, cooling, crystallizing and concentrating

Also Published As

Publication number Publication date
FR990016A (en) 1951-09-17
BE489948A (en) 1900-01-01
DE853937C (en) 1952-10-30
US2592139A (en) 1952-04-08
NL70236C (en) 1900-01-01

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