DE423860C - Process for the production of carbon disulfide from rhodanammonium - Google Patents
Process for the production of carbon disulfide from rhodanammoniumInfo
- Publication number
- DE423860C DE423860C DEG60192D DEG0060192D DE423860C DE 423860 C DE423860 C DE 423860C DE G60192 D DEG60192 D DE G60192D DE G0060192 D DEG0060192 D DE G0060192D DE 423860 C DE423860 C DE 423860C
- Authority
- DE
- Germany
- Prior art keywords
- rhodanammonium
- carbon disulfide
- production
- reaction
- percent
- 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
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/70—Compounds containing carbon and sulfur, e.g. thiophosgene
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Gewinnung von Schwefelkohlenstoff aus Rhodanammonium. Es ist bekannt, daß Rhodanammonium beim Erhitzen oder Schmelzen für sich neben anderen Produkten auch Schwefelkohlenstoff liefert. Die Ausbeuten an Schwefelkohlenstoff sind aber so geringfügig, (laß an eine technische Verwertung dieser Reaktion nicht zu denken ist. So gibt C 1 a u s (Annalen der Chemie, 179, Seite i2o) als günstigste Schwefelkohlenstoffausbeüte seiner Versuche nur 2o Prozent an, also etwa 1/;, des Gewichtes des zersetzten \ H-,C\ S. Trotz genauer Untersuchungen war es ihm nicht möglich, die von L i e b i g (Annalen der Chemie, io, Seite 15) bezüglich der Schwefelkohlenstoffausbeute gemachten Angaben (fast 25 Prozent) zu erreichen. Es wurde nun die überraschende Beobachtung gemacht, daß sich die Schwefelkohlenstoffausbeute auf 37 bis 40 Prozent, (l. h. bis z/, des Gewichtes des zersetzten N H,,C\ S steigern läßt, wenn bei der Reaktion Wasserdampf zugegen ist. Es wird hiermit also ; 5 Prozent bis 8o Prozent der Theorie erreicht. Die Beobachtung dieser hohen Ausbeute ist auch insofern überraschend und nicht vorauszusehen, als auf Grund des von L i e b i g angegebenen Reaktionsschemas (1. c.) überhaupt nur 25 Prozent Ausbeute zu erwarten `waren. Die neue 1 Beobachtung zeigt mithin auch gleichzeitig, (laß die Reaktion in anderer Art, als sie von I, i e b i g formuliert ist, verlaufen muß. Zur Erreichung der jetzt beobachteten Ausbeuten muß man durch geschmolzenes Rhodanammonium bei 25o bis 3oo° einen Wasserdampfstrom leiten, oder man kann den Schwefelkohlenstoff auch direkt aus Rhodanammoniumlösungen gewinnen, indem man diese einfach in auf 2oo° und mehr erhitzte Gefäße eintropfen läßt. Etwa uniersetzt überdestillierendes Rhodanammonium kann man z. B. durch aufgesetzte Kolonnen zurückhalten, die die Hauptmenge des verdampften Wassers und den Schwefelkohlenstoff und auch das Ammoniak durchlassen, aber (las Rhodanamrnionium zurückhalten. Läßt man die abziehenden Dämpfe (tann noch heiße verdünnte Schwefelsäure durchstreichen, so wird auch das Ammoniak entfernt, und in einem nachgeschalteten Kühler kann man unter dem kondensierten Wa.ser direkt den entstandenen Schwefelkohlenstoff abziehen.Process for the production of carbon disulfide from rhodanammonium. It is known that rhodanammonium, when heated or melted, also provides carbon disulfide in addition to other products. The yields of carbon disulfide are so small, however, (let us not think of a technical utilization of this reaction. So C 1 gives (Annalen der Chemie, 179, page 12) as the most favorable carbon disulfide yield of his experiments only 20 percent, i.e. about 1 / ;, the weight of the decomposed \ H-, C \ S. Despite detailed investigations, it was not possible for him to provide the information (almost 25 percent) made by L iebig (Annalen der Chemie, io, page 1 5) regarding the carbon disulfide yield The surprising observation has now been made that the carbon disulfide yield can be increased to 37 to 40 percent, (1h to 2½, of the weight of the decomposed NH ,, C \ S, if water vapor is present in the reaction thus; 5 percent to 80 percent of theory achieved. The observation of this high yield is also surprising and not to be foreseen, as on the basis of the reaction scheme given by Liebig (1. c.) only 25 percent ent yield to be expected `were. The new observation thus also shows at the same time (let the reaction proceed in a different way than it has been formulated by I. To achieve the yields now observed, a stream of steam must be passed through molten rhodanammonium at 25o to 300 °, or The carbon disulfide can also be obtained directly from rhodanammonium solutions by simply dropping them into vessels heated to 200 ° and more Let the ammonia pass, too, but (read rhodanamine ionium to be retained. If the vapors which are drawn off are allowed to pass through the still hot dilute sulfuric acid, the ammonia is also removed, and the carbon disulfide formed can be drawn off directly under the condensed water in a downstream cooler.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG60192D DE423860C (en) | 1923-11-23 | 1923-11-23 | Process for the production of carbon disulfide from rhodanammonium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG60192D DE423860C (en) | 1923-11-23 | 1923-11-23 | Process for the production of carbon disulfide from rhodanammonium |
Publications (1)
Publication Number | Publication Date |
---|---|
DE423860C true DE423860C (en) | 1926-01-11 |
Family
ID=7132382
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEG60192D Expired DE423860C (en) | 1923-11-23 | 1923-11-23 | Process for the production of carbon disulfide from rhodanammonium |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE423860C (en) |
-
1923
- 1923-11-23 DE DEG60192D patent/DE423860C/en not_active Expired
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