GB1038175A - Process of and apparatus for the manufacture of sodium sulphate from viscose coagulation baths - Google Patents
Process of and apparatus for the manufacture of sodium sulphate from viscose coagulation bathsInfo
- Publication number
- GB1038175A GB1038175A GB17334/63A GB1733463A GB1038175A GB 1038175 A GB1038175 A GB 1038175A GB 17334/63 A GB17334/63 A GB 17334/63A GB 1733463 A GB1733463 A GB 1733463A GB 1038175 A GB1038175 A GB 1038175A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conduit
- sodium sulphate
- absorber
- crystallizer
- supplied
- 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
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)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
<PICT:1038175/C1/1> Anhydrous Na2SO4 is recovered from a viscose coagulation bath by cooling the coagulation bath in a crystallizer by expansion under vacuum, allowing the water vapour produced to pass into an absorber in which it undergoes exothermic reaction with CH2SO4, passing the hot acid into a heat exchanger to which is supplied sodium sulphate decahydrate originating in the vacuum crystallizer, and thus dehydrating the hydrous salt. Additional heat from a separate source may be supplied to the heat exchanger. A viscose coagulation bath enters vacuum evaporator or crystallizer 1 by conduit 2 and is withdrawn therefrom, cooled and containing Na2SO410H2O, by conduit 3 opening into the casing of heat exchanger 4. Water vapour from 1 is withdrawn by conduit 5 into absorber 6 where it condenses and is absorbed by sulphuric acid introduced by conduit 7. Sulphuric acid is continuously cycled in the circuit consisting of absorber 6, pump 8, serpentine 9 of exchanger 4 and conduit 7. Concentrated H2SO4, e.g. at 66 DEG B<\>ae, is introduced into the circuit by conduit 10 connected to conduit 7 and dilute acid may be removed by conduit 11 as necessary. Sodium sulphate entering as the decahydrate into exchanger 4 is dehydrated therein and withdrawn by conduit 12. Steam is removed from 4 by conduit 13 and condensed elsewhere. Additional heat if required may be supplied to 4 by means of auxiliary serpentine 15.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR896844A FR1330350A (en) | 1962-05-08 | 1962-05-08 | Process for the production of anhydrous sodium sulphate from viscose coagulation baths |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1038175A true GB1038175A (en) | 1966-08-10 |
Family
ID=8778474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17334/63A Expired GB1038175A (en) | 1962-05-08 | 1963-05-02 | Process of and apparatus for the manufacture of sodium sulphate from viscose coagulation baths |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1289241B (en) |
| FR (1) | FR1330350A (en) |
| GB (1) | GB1038175A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE461184A (en) * | 1942-08-13 | 1900-01-01 |
-
1962
- 1962-05-08 FR FR896844A patent/FR1330350A/en not_active Expired
-
1963
- 1963-05-02 GB GB17334/63A patent/GB1038175A/en not_active Expired
- 1963-05-04 DE DEA43046A patent/DE1289241B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1289241B (en) | 1969-02-13 |
| FR1330350A (en) | 1963-06-21 |
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