PL8795B1 - A method for the production of sodium bisulfide by saturating with hydrogen sulfide the waste caustic soda obtained in the manufacture of artificial fibers with a viscose system. - Google Patents
A method for the production of sodium bisulfide by saturating with hydrogen sulfide the waste caustic soda obtained in the manufacture of artificial fibers with a viscose system. Download PDFInfo
- Publication number
- PL8795B1 PL8795B1 PL8795A PL879527A PL8795B1 PL 8795 B1 PL8795 B1 PL 8795B1 PL 8795 A PL8795 A PL 8795A PL 879527 A PL879527 A PL 879527A PL 8795 B1 PL8795 B1 PL 8795B1
- Authority
- PL
- Poland
- Prior art keywords
- hydrogen sulfide
- caustic soda
- manufacture
- production
- saturating
- Prior art date
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 title claims description 21
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title claims description 10
- 239000002699 waste material Substances 0.000 title claims description 8
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title claims description 7
- 235000011121 sodium hydroxide Nutrition 0.000 title claims description 7
- 229920000297 Rayon Polymers 0.000 title claims description 4
- 229920002994 synthetic fiber Polymers 0.000 title claims description 4
- 238000000034 method Methods 0.000 title claims description 3
- 238000009738 saturating Methods 0.000 title claims 2
- IHYNKGRWCDKNEG-UHFFFAOYSA-N n-(4-bromophenyl)-2,6-dihydroxybenzamide Chemical compound OC1=CC=CC(O)=C1C(=O)NC1=CC=C(Br)C=C1 IHYNKGRWCDKNEG-UHFFFAOYSA-N 0.000 title 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 4
- CJDPJFRMHVXWPT-UHFFFAOYSA-N barium sulfide Chemical compound [S-2].[Ba+2] CJDPJFRMHVXWPT-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- 229920002488 Hemicellulose Polymers 0.000 claims description 2
- 229920002955 Art silk Polymers 0.000 claims 1
- 239000000835 fiber Substances 0.000 claims 1
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 claims 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 229910052979 sodium sulfide Inorganic materials 0.000 description 2
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000007832 Na2SO4 Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-M hydrosulfide Chemical compound [SH-] RWSOTUBLDIXVET-UHFFFAOYSA-M 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- UNHKSXOTUHOTAB-UHFFFAOYSA-N sodium;sulfane Chemical compound [Na].S UNHKSXOTUHOTAB-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Description
Wiadomem jest, jak wielka trudnosc stanowi uzycie sody kaustycznej odpadko¬ wej, otrzymywanej przy fabrykacji sztucz¬ nych wlókien systemem wiskozowym. Ta¬ ka sama trudnosc zachodzi z odpadkowemi kwasami, otrzymywanemi przy tejze fa¬ brykacji. Caly szereg istniejacych paten¬ tów na tak zwana regeneracje sody kau¬ stycznej i kwasów nie daje dobrych wyni¬ ków gospodarczych; wszystkie one sa bo¬ wiem kosztowne, o ile ma sie na celu otrzy¬ manie produktów chemicznie czystych.Trescia patentu niniejszego jest ^zasto¬ sowanie odpadków wyzej wymienionych, mianowicie otrzymywanie z nich wodoro¬ siarczku sodu.Soda kaustyczna odpadkowa zawiera, jak wiadomo, pewne ilosci hemicelulozy i innych substancyj organicznych. Zanieczy¬ szczenie to jest wlasnie zwykle powodem, dla którego wszystkie reakcje z ta odpad¬ kowa soda kaustyczna staja sie utrudnione.Droga starannych badan zostalo stwierdzo¬ ne, ze wieksza czesc tych organicznych za¬ nieczyszczen usuwa sie z latwoscia przez wprowadzenie siarkowodoru, który niemal calkowicie straca hemieeluloze.Otrzymany w ten sposób wodorosiar- czek moze byc z korzyscia uzyty np. przy fabrykacji jedwabiu systemu Chardonnefa, gdzie, jak wiadomo, potrzebne sa ogromne ilosci wodorosiarczku.Reakcja nasycenia siarkowodorem od¬ bywa sie szczególnie pomyslnie w rozcien-czonych, np, 15%-eh, roztworach i przy temperaturze 20—25°.Siarkowodór do powyzszego celu otrzy¬ muje sie dzialaniem mieszaniny kwasu siar¬ kowego i siarczanu sodu na siarczek baro¬ wy. Jak wiadomo, mieszanina ta stanowi wlasnie produkt uboczny, otrzymywany przy fabrykacji wiskozy. Otrzymuje sie re¬ akcje, która da sie wyrazic równaniami na¬ stepuj acemi: BaS + H2S04 = BaS04 + H2S . ) Na2S + H2S04 = Na2SO± + H2S. 1 | BaS + Na2S04 = Na2S + BaS04 W wyniku otrzymuje sie osad czysty siarczanu barowego, siarkowodór, jako gaz i wreszcie w roztworze wodnym zostaje Na2SOif który daje sie z latwoscia wy¬ krystalizowac.Stracony siarczan barowy uzywa sie, jako cenny produkt do fabrykacji litoponu, albo tez przez redukcje z weglem otrzymu¬ je sie z niego siarczek baru, który ponow¬ nie wprowadza sie do cyklu reakcji, beda¬ cego przedmiotem niniejszego patentu.W ten sposób obydwa produkty odpad¬ kowe znajduja cenne zastosowanie przy fabrykacji jedwabiu kolodjonowego. PL PLIt is known how great a difficulty is the use of waste caustic soda, obtained in the manufacture of artificial fibers with a viscose system. The same difficulty occurs with the waste acids produced by this process. The entire number of existing patents for the so-called regeneration of caustic soda and acids do not give good economic results; They are all expensive if the aim is to obtain chemically pure products. The subject matter of this patent is the use of the waste mentioned above, namely the preparation of sodium hydrogen sulphide from them. Waste caustic soda contains, as is known, certain amounts of hemicellulose and other organic substances. This contamination is usually the reason why all reactions with this waste caustic soda become difficult. The path of careful research has found that most of these organic contaminants are easily removed by introducing hydrogen sulphide, which is almost It completely loses hemieellulose. Hydrogen sulphide obtained in this way can be used with advantage, for example, in the fabrication of silk in the Chardonnef system, where, as it is known, large amounts of hydrosulphide are needed. 15% strength in solutions and at a temperature of 20-25 °. Hydrogen sulfide for the above purpose is obtained by the action of a mixture of sulfuric acid and sodium sulfate on the barium sulfide. As you know, this mixture is a by-product of the manufacture of viscose. A reaction is obtained, which can be expressed by the following equations: BaS + H2SO4 = BaSO4 + H2S. ) Na2S + H2SO4 = Na2SO + H2S. 1 | BaS + Na2SO4 = Na2S + BaSO4 The result is a pure barium sulphate precipitate, hydrogen sulphide as a gas, and finally Na2SOif remains in the aqueous solution, which can easily crystallize out. The lost barium sulphate is used as a valuable product for lithopone fabrication, or also by reducing it with carbon, barium sulphide is obtained, which is reintroduced into the reaction cycle, which is the subject of this patent. Thus, both waste products find valuable use in the fabrication of collodion silk. PL PL
Claims (2)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL8795B1 true PL8795B1 (en) | 1928-05-31 |
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