GB596086A - Improved process for the recovery of chemical products from viscose rayon spinning baths - Google Patents
Improved process for the recovery of chemical products from viscose rayon spinning bathsInfo
- Publication number
- GB596086A GB596086A GB18390/45A GB1839045A GB596086A GB 596086 A GB596086 A GB 596086A GB 18390/45 A GB18390/45 A GB 18390/45A GB 1839045 A GB1839045 A GB 1839045A GB 596086 A GB596086 A GB 596086A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crystals
- sodium sulphate
- sulphate
- solution
- zinc
- 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
- 238000009987 spinning Methods 0.000 title abstract 3
- 229920000297 Rayon Polymers 0.000 title abstract 2
- 239000000126 substance Substances 0.000 title abstract 2
- 238000000034 method Methods 0.000 title 1
- 238000011084 recovery Methods 0.000 title 1
- PMZURENOXWZQFD-UHFFFAOYSA-L na2so4 Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 abstract 14
- 229910052938 sodium sulfate Inorganic materials 0.000 abstract 7
- 235000011152 sodium sulphate Nutrition 0.000 abstract 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 3
- NWONKYPBYAMBJT-UHFFFAOYSA-L Zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 abstract 3
- 239000000243 solution Substances 0.000 abstract 3
- 239000001117 sulphuric acid Substances 0.000 abstract 3
- 235000011149 sulphuric acid Nutrition 0.000 abstract 3
- 239000011686 zinc sulphate Substances 0.000 abstract 3
- 235000009529 zinc sulphate Nutrition 0.000 abstract 3
- 239000012452 mother liquor Substances 0.000 abstract 2
- 150000003839 salts Chemical class 0.000 abstract 2
- 239000011780 sodium chloride Substances 0.000 abstract 2
- 238000005406 washing Methods 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 239000002253 acid Substances 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-M hydrogensulfate Chemical class OS([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-M 0.000 abstract 1
- 239000012047 saturated solution Substances 0.000 abstract 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 abstract 1
- 229910052708 sodium Inorganic materials 0.000 abstract 1
- 239000011734 sodium Substances 0.000 abstract 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract 1
- 239000011701 zinc Substances 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
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
- C01D5/006—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
Abstract
Chemical products, from viscose rayon spinning baths containing sulphuric acid, sodium sulphate and less than 2 per cent. of zinc sulphate in solution, are recovered by evaporating water from said bath while maintaining the temperature above 32 DEG C. so as to precipitate crystals of anhydrous sodium sulphate associated with complex salts containing sodium, zinc and hydrogen sulphates, separating the crystals from the mother liquor at a temperature above 32 DEG C. and then submitting the crystals to countercurrent lixiviation with an aqueous sodium sulphate solution at a temperature above 32 DEG C., the amount of water in said solution being insufficient to dissolve all the sodium sulphate contained in the crystals but sufficient to decompose the complex salts and dissolve substantially all the sulphuric acid and zinc sulphate contained therein. The lixiviation may be effected in two stages, in the first of which sodium sulphate collected as drippings from freshly spun threads may be used, and a hot saturated solution of pure sodium sulphate for the last washing stage. The acid mother liquor removed from the crystals and the washing liquor containing sulphuric acid and zinc sulphate may be returned to the spinning bath, while the crystals of sodium sulphate may be dried. Specifications 298,639, [Class 1 (ii)], 384,726, U.S.A. Specifications 1,863,172, 2,374,004 and German Specification 356,103 are referred to.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL61277D NL61277C (en) | 1945-07-18 | ||
| BE465367D BE465367A (en) | 1945-07-18 | ||
| FR926960D FR926960A (en) | 1945-07-18 | 1946-05-15 | Process for recovering chemicals from viscose rayon spinning baths |
| DEP28677D DE853493C (en) | 1945-07-18 | 1948-12-31 | Process for the recovery of anhydrous sodium sulphate from spent viscose hair balls |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB596086A true GB596086A (en) | 1947-12-29 |
Family
ID=1733875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18390/45A Expired GB596086A (en) | 1945-07-18 | 1945-07-18 | Improved process for the recovery of chemical products from viscose rayon spinning baths |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB596086A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2645561A (en) * | 1948-11-23 | 1953-07-14 | Ind Rayon Corp | Sodium sulfate recovery |
| US2893836A (en) * | 1954-12-06 | 1959-07-07 | Monsanto Chemicals | Process for producing substantially white sodium bisulfate |
| CN112473288A (en) * | 2020-11-25 | 2021-03-12 | 赛得利(九江)纤维有限公司 | Acid bath washing dust removal device and method |
-
1945
- 1945-07-18 GB GB18390/45A patent/GB596086A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2645561A (en) * | 1948-11-23 | 1953-07-14 | Ind Rayon Corp | Sodium sulfate recovery |
| US2893836A (en) * | 1954-12-06 | 1959-07-07 | Monsanto Chemicals | Process for producing substantially white sodium bisulfate |
| CN112473288A (en) * | 2020-11-25 | 2021-03-12 | 赛得利(九江)纤维有限公司 | Acid bath washing dust removal device and method |
| 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 |
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