DE857955C - Process for the production of tetrachlorethylene in addition to carbon tetrachloride - Google Patents
Process for the production of tetrachlorethylene in addition to carbon tetrachlorideInfo
- Publication number
- DE857955C DE857955C DEB14290A DEB0014290A DE857955C DE 857955 C DE857955 C DE 857955C DE B14290 A DEB14290 A DE B14290A DE B0014290 A DEB0014290 A DE B0014290A DE 857955 C DE857955 C DE 857955C
- Authority
- DE
- Germany
- Prior art keywords
- tetrachlorethylene
- carbon tetrachloride
- addition
- production
- methane
- 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
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/093—Preparation of halogenated hydrocarbons by replacement by halogens
- C07C17/10—Preparation of halogenated hydrocarbons by replacement by halogens of hydrogen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/26—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton
- C07C17/263—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton by condensation reactions
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung von Tetrachloräthylen neben Tetrachlorkohlenstoff Es ist bekannt, daß man durch Behandeln von Methan mit mehr als i Mol Chlor im Licht bei Temperaturen bis zu etwa 400° neben Methylchlorid, Methylenchlorid und Chloroform im wesentlichen Tetrachlorkohlenstoff erhält, und daß man Tetrachlorkohlenstoff durch Erhitzen auf Temperaturen zwischen etwa 5oo und iooo° in Tetrachloräthvlen und Chlor spalten kann.Process for the production of tetrachlorethylene in addition to carbon tetrachloride It is known that by treating methane with more than 1 mole of chlorine in the light at temperatures up to about 400 ° in addition to methyl chloride, methylene chloride and chloroform essentially obtained carbon tetrachloride, and that one carbon tetrachloride by heating to temperatures between about 500 and 100 ° in tetrachlorethylene and can split chlorine.
Es wurde nun gefunden, daß man in technisch einfacher Weise Tetrachloräthylen neben Tetrachlorkohlenstoff erhält, wenn man auf Methan bei 150 bis 450', insbesondere bei 250 und 32o°, unter intensiver Bestrahlung mit Licht vom Wellenbereich 300 bis 400 mu Chlor einwirken läßt. Das Mengenverhältnis von Chlor und Methan spielt dabei eine untergeordnete Rolle; man verwendet aber zweckmäßig ein Volumenverhältnis von i Volumen Methan zu 2 bis 5 Volumen Chlor und eine Reaktionszeit von mindestens i Minute.It has now been found that tetrachlorethylene is obtained in a technically simple manner in addition to carbon tetrachloride if methane is allowed to act on methane at 150 to 450 °, in particular at 250 and 320 °, under intensive irradiation with light in the wave range of 300 to 400 mu of chlorine. The proportions of chlorine and methane play a subordinate role; but it is expedient to use a volume ratio of 1 volume of methane to 2 to 5 volumes of chlorine and a reaction time of at least 1 minute.
Geeignete Lichtquellen sind insbesondere Quecksilberdampflampen mit oder ohne fluoreszierenden Belag. Je größer die Intensität des Lichtes ist, bei um so tieferer Temperatur kann man arbeiten. Die günstigsten Temperaturbedingungen und die Mindestreaktionszeit für eine gegebene Lichtquelle lassen sich durch Vorversuche leicht ermitteln, und umgekehrt. Wesentlich ist, daß man eine Erhöhung der Temperatur auf über 45o° vermeidet, gegebenenfalls durch Kühlung, da andernfalls Entflammung unter RuB-bildung erfolgt.Suitable light sources are in particular mercury vapor lamps or without a fluorescent coating. The greater the intensity of the light is at the lower the temperature one can work. The most favorable temperature conditions and the minimum response time for a given light source can be determined by preliminary experiments easily determined, and vice versa. It is essential that you increase the temperature to over 45o °, if necessary by Cooling, otherwise Inflammation takes place with the formation of soot.
Das entstehende Gemisch von Tetrachlorkohlenstoff und Tetrachloräthylen wird in üblicher Weise von Chlorwasserstoff und überschüssigem Chlor befreit und kann als solches, z. B. als Lösungsmittel, verwendet werden. Es läBt sich auch leicht durch fraktionierte Destillation trennen. Beispiel Durch ein mit keramischem Material oder Graphit ausgekleidetes Rohr von 8oo 1 Inhalt, in welches mehrere Quecksilberdampflampen eingebaut sind, leitet man bei 28o° Methan und Chlor im Volumenverhältnis 1 : 3,8 mit einer solchen Geschwindigkeit, daß das Gasgemisch etwa 5 Minuten im Rohr verweilt. Die erhaltenen Reaktionsprodukte werden gekühlt und mit Wasser gewaschen. Man erhält Tetrachloräthylen und Tetrachlorkohlenstoff im Mengenverhältnis von etwa 6o: 40, entsprechend einer Ausbeute von 35 °;o Tetrachloräthylen, bezogen auf angewendetes Methan.The resulting mixture of carbon tetrachloride and tetrachlorethylene is freed from hydrogen chloride and excess chlorine in the usual way and can as such, e.g. B. can be used as a solvent. It can also be easy separate by fractional distillation. Example by one with ceramic material or graphite-lined tube with a capacity of 800 liters, in which several mercury-vapor lamps are installed, methane and chlorine in a volume ratio of 1: 3.8 are passed at 280 ° at such a rate that the gas mixture remains in the tube for about 5 minutes. The reaction products obtained are cooled and washed with water. You get Tetrachlorethylene and carbon tetrachloride in a proportion of about 6o: 40, corresponding to a yield of 35 °; o tetrachlorethylene, based on the applied Methane.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB14290A DE857955C (en) | 1951-03-23 | 1951-03-23 | Process for the production of tetrachlorethylene in addition to carbon tetrachloride |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB14290A DE857955C (en) | 1951-03-23 | 1951-03-23 | Process for the production of tetrachlorethylene in addition to carbon tetrachloride |
Publications (1)
Publication Number | Publication Date |
---|---|
DE857955C true DE857955C (en) | 1952-12-04 |
Family
ID=6957914
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB14290A Expired DE857955C (en) | 1951-03-23 | 1951-03-23 | Process for the production of tetrachlorethylene in addition to carbon tetrachloride |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE857955C (en) |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013096311A1 (en) * | 2011-12-22 | 2013-06-27 | Dow Global Technologies, Llc | Process for the production of tetrachloromethane |
US8558041B2 (en) | 2009-10-09 | 2013-10-15 | Dow Global Technologies, Llc | Isothermal multitube reactors and processes incorporating the same |
US8581012B2 (en) | 2009-10-09 | 2013-11-12 | Dow Global Technologies, Llc | Processes for the production of chlorinated and/or fluorinated propenes and higher alkenes |
US8581011B2 (en) | 2009-10-09 | 2013-11-12 | Dow Global Technologies, Llc | Process for the production of chlorinated and/or fluorinated propenes |
US8907149B2 (en) | 2011-05-31 | 2014-12-09 | Dow Global Technologies Llc | Process for the production of chlorinated propenes |
US8907148B2 (en) | 2011-08-07 | 2014-12-09 | Dow Global Technologies Llc | Process for the production of chlorinated propenes |
US8927792B2 (en) | 2011-06-08 | 2015-01-06 | Dow Agrosciences, Llc | Process for the production of chlorinated and/or fluorinated propenes |
US9056808B2 (en) | 2011-05-31 | 2015-06-16 | Dow Global Technologies, Llc | Process for the production of chlorinated propenes |
US9067855B2 (en) | 2011-11-21 | 2015-06-30 | Dow Global Technologies Llc | Process for the production of chlorinated alkanes |
US9199899B2 (en) | 2011-12-02 | 2015-12-01 | Blue Cube Ip Llc | Process for the production of chlorinated alkanes |
US9233896B2 (en) | 2011-08-07 | 2016-01-12 | Blue Cube Ip Llc | Process for the production of chlorinated propenes |
US9284239B2 (en) | 2011-12-02 | 2016-03-15 | Blue Cube Ip Llc | Process for the production of chlorinated alkanes |
US9321707B2 (en) | 2012-09-20 | 2016-04-26 | Blue Cube Ip Llc | Process for the production of chlorinated propenes |
US9334205B2 (en) | 2011-12-13 | 2016-05-10 | Blue Cube Ip Llc | Process for the production of chlorinated propanes and propenes |
US9382176B2 (en) | 2013-02-27 | 2016-07-05 | Blue Cube Ip Llc | Process for the production of chlorinated propenes |
US9403741B2 (en) | 2013-03-09 | 2016-08-02 | Blue Cube Ip Llc | Process for the production of chlorinated alkanes |
US9475740B2 (en) | 2012-12-19 | 2016-10-25 | Blue Cube Ip Llc | Process for the production of chlorinated propenes |
US9512049B2 (en) | 2011-12-23 | 2016-12-06 | Dow Global Technologies Llc | Process for the production of alkenes and/or aromatic compounds |
US9512053B2 (en) | 2012-12-18 | 2016-12-06 | Blue Cube Ip Llc | Process for the production of chlorinated propenes |
US9598334B2 (en) | 2012-09-20 | 2017-03-21 | Blue Cube Ip Llc | Process for the production of chlorinated propenes |
US9795941B2 (en) | 2012-09-30 | 2017-10-24 | Blue Cube Ip Llc | Weir quench and processes incorporating the same |
US10065157B2 (en) | 2012-10-26 | 2018-09-04 | Blue Cube Ip Llc | Mixer and processes incorporating the same |
-
1951
- 1951-03-23 DE DEB14290A patent/DE857955C/en not_active Expired
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8933280B2 (en) | 2009-10-09 | 2015-01-13 | Dow Global Technologies Llc | Processes for the production of hydrofluoroolefins |
US8558041B2 (en) | 2009-10-09 | 2013-10-15 | Dow Global Technologies, Llc | Isothermal multitube reactors and processes incorporating the same |
US8581012B2 (en) | 2009-10-09 | 2013-11-12 | Dow Global Technologies, Llc | Processes for the production of chlorinated and/or fluorinated propenes and higher alkenes |
US8581011B2 (en) | 2009-10-09 | 2013-11-12 | Dow Global Technologies, Llc | Process for the production of chlorinated and/or fluorinated propenes |
US8926918B2 (en) | 2009-10-09 | 2015-01-06 | Dow Global Technologies Llc | Isothermal multitube reactors |
US9056808B2 (en) | 2011-05-31 | 2015-06-16 | Dow Global Technologies, Llc | Process for the production of chlorinated propenes |
US8907149B2 (en) | 2011-05-31 | 2014-12-09 | Dow Global Technologies Llc | Process for the production of chlorinated propenes |
US8927792B2 (en) | 2011-06-08 | 2015-01-06 | Dow Agrosciences, Llc | Process for the production of chlorinated and/or fluorinated propenes |
US9475739B2 (en) | 2011-08-07 | 2016-10-25 | Blue Cube Ip Llc | Process for the production of chlorinated propenes |
US8907148B2 (en) | 2011-08-07 | 2014-12-09 | Dow Global Technologies Llc | Process for the production of chlorinated propenes |
US9233896B2 (en) | 2011-08-07 | 2016-01-12 | Blue Cube Ip Llc | Process for the production of chlorinated propenes |
US9067855B2 (en) | 2011-11-21 | 2015-06-30 | Dow Global Technologies Llc | Process for the production of chlorinated alkanes |
US9284239B2 (en) | 2011-12-02 | 2016-03-15 | Blue Cube Ip Llc | Process for the production of chlorinated alkanes |
US9199899B2 (en) | 2011-12-02 | 2015-12-01 | Blue Cube Ip Llc | Process for the production of chlorinated alkanes |
US9334205B2 (en) | 2011-12-13 | 2016-05-10 | Blue Cube Ip Llc | Process for the production of chlorinated propanes and propenes |
US9169177B2 (en) | 2011-12-22 | 2015-10-27 | Blue Cube Ip Llc | Process for the production of tetrachloromethane |
WO2013096311A1 (en) * | 2011-12-22 | 2013-06-27 | Dow Global Technologies, Llc | Process for the production of tetrachloromethane |
CN104011000A (en) * | 2011-12-22 | 2014-08-27 | 陶氏环球技术有限责任公司 | Process For The Production Of Tetrachloromethane |
US9512049B2 (en) | 2011-12-23 | 2016-12-06 | Dow Global Technologies Llc | Process for the production of alkenes and/or aromatic compounds |
US9321707B2 (en) | 2012-09-20 | 2016-04-26 | Blue Cube Ip Llc | Process for the production of chlorinated propenes |
US9598334B2 (en) | 2012-09-20 | 2017-03-21 | Blue Cube Ip Llc | Process for the production of chlorinated propenes |
US9795941B2 (en) | 2012-09-30 | 2017-10-24 | Blue Cube Ip Llc | Weir quench and processes incorporating the same |
US10065157B2 (en) | 2012-10-26 | 2018-09-04 | Blue Cube Ip Llc | Mixer and processes incorporating the same |
US9512053B2 (en) | 2012-12-18 | 2016-12-06 | Blue Cube Ip Llc | Process for the production of chlorinated propenes |
US9475740B2 (en) | 2012-12-19 | 2016-10-25 | Blue Cube Ip Llc | Process for the production of chlorinated propenes |
US9382176B2 (en) | 2013-02-27 | 2016-07-05 | Blue Cube Ip Llc | Process for the production of chlorinated propenes |
US9403741B2 (en) | 2013-03-09 | 2016-08-02 | Blue Cube Ip Llc | Process for the production of chlorinated alkanes |
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