DE888389C - Process for the production of chloroethylenes from chlorinated ethanes - Google Patents

Process for the production of chloroethylenes from chlorinated ethanes

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Publication number
DE888389C
DE888389C DEP18344D DEP0018344D DE888389C DE 888389 C DE888389 C DE 888389C DE P18344 D DEP18344 D DE P18344D DE P0018344 D DEP0018344 D DE P0018344D DE 888389 C DE888389 C DE 888389C
Authority
DE
Germany
Prior art keywords
chlorinated
emulsifying
production
chlorinated ethane
reaction
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
Application number
DEP18344D
Other languages
German (de)
Inventor
Erich Schaeffer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wacker Chemie AG
Original Assignee
Wacker Chemie AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wacker Chemie AG filed Critical Wacker Chemie AG
Priority to DEP18344D priority Critical patent/DE888389C/en
Application granted granted Critical
Publication of DE888389C publication Critical patent/DE888389C/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00Preparation of halogenated hydrocarbons
    • C07C17/25Preparation of halogenated hydrocarbons by splitting-off hydrogen halides from halogenated hydrocarbons

Description

Verfahren zur Herstellung von Chloräthylenen aus chlorierten Äthanen Es ist bekannt, Chloräthylene aus chlorierten Äthanen, vornehmlich von Perchloräthylen aus Pentach.loräthan, durch Einwirkung von Ka@lkmisch auf feinverteilte chlorierte Äthane unterhalb des Siedepunktes herzustellen.Process for the production of chloroethylenes from chlorinated ethanes It is known that chloroethylenes are made from chlorinated ethanes, especially perchlorethylene from pentachloroethane, by the action of calcium carbonate on finely divided chlorinated ones To produce ethanes below the boiling point.

Es wurde gefunden, daß die Umsetzung erheblich, etwa um das b- bis 8fache beschleunigt wird, wenn man sie in Gegenwart von Emulgierungsmieteln oder in der Textilindustrie gebräuchlichen Netzmitteln vornimmt. Als solche eignen sich z. B. o.ooz % S.e,ife, o,o5o,o/o Sulfitzellstoffablauge, ferner Polyvinvlalkohol, Celluloseglykol:at, Kondensationsprodukte .aus Fettsäurechlorid und OxäthyIsulfosäure etwa in Mengen von @o,oz bis o,o5 1/o, bezogen auf .das angewandtle chlorierte Äbhan. Die Zusätze sind im allgemeinen äußerst niedrig, so daß sie die .Wirtschaftlichkeit des Verfahrens praktisch nicht beeinflussen. Besonders zweckmäßig ist es, wenn man eine Emulgiervorrichtung verwendet und mit Hilfe der Emulgierungsmittel z. B. eine Emulsion von Kallanilch und Pentachloräthan herstellt. Diese läßt man dann in das eigentliche Umsetzungsgefäß laufen, in dem überraschend schnell die Überführung des Pentachloräthans im PerchloräthvIen stattfindet. Das Umsetzungsgefäß braucht in diesem Falle nur mit einem einfachen Rührwerk: ausgestattet zu sein; es ist ,jedoch .auch möglich, auf eine mechanische lUischung vollkommen zu ver- zichten. Beispiel In eine Em:ulgiermasdhine werden s.äindlicli iooo kg Pentächloräthan und :2ooo kg io°/oige Kalkmilch mit -einer Temperatur vM 3o bis 4o° owie 4 1 einer i.0°/nigen Sulfitzellistoffab1auge- lösung eingeleitet. Aus dieser läßt man die gebilidete Emulsion in zwei hintereinarnde.rgeschaltete Um- satzun%gefäläe mit je 3000 cbm Inhalt laufen, welche keine oder nuT ganz langsam laufende Rühn-- werke besitzen. Aus dem zweiten Behälter wird das Reaktionsgemisch. welches nur noch aus Kalkmilch, Calciu.mohlo,ri,d und pentachloräthanfreiem Per- chloräthylen besteht, fortlaufend -abgezogen - und daraus duTch direktes Einleiten von reines PerchloTäthylen abgetrennt. It has been found that the reaction is accelerated considerably, by about b to 8 times, if it is carried out in the presence of emulsifying agents or wetting agents customary in the textile industry. As such are z. B. o.ooz% Se, ife, o, o5o, o / o sulphite cellulose waste liquor, also polyvinyl alcohol, cellulose glycol: ate, condensation products .from fatty acid chloride and oxäthyIsulphonic acid approximately in amounts of @ o, oz to o, o5 1 / o, based on The chlorinated abhan used. The additives are generally extremely low, so that they have practically no effect on the economy of the process. It is particularly useful to use an emulsifying device and, with the help of the emulsifying agent, for. B. produces an emulsion of kallanilch and pentachloroethane. This is then allowed to run into the actual reaction vessel, in which the conversion of the pentachloroethane into the perchlorethylene takes place surprisingly quickly. In this case, the conversion vessel only needs a simple agitator: to be equipped; it is, however, also possible completely reliant on a mechanical renounce. example In an em: ulgiermasdhine s.äindlicli 100 kg pentachloroethane and: 2000 kg 100% Lime milk with a temperature of 3o to 4o ° as well as 4 1 of an approximately 0% sulphite pulp eye solution initiated. From this one leaves the educated Emulsion in two consecutively switched satzun% slopes with 3000 cbm each run, which no or only very slowly running Rühn-- own works. The second container will do that Reaction mixture. which only made of milk of lime, Calciu.mohlo, ri, d and pentachloroethane-free per- chloroethylene exists, continuously - withdrawn - and from this you direct introduction of Pure Perchlo-Ethylene separated.

Claims (1)

PATENTANSPRÜCHE: i.- Verfahren zur Herstellung von Chloräthvlemen. aus chlorierten Äthanen, vornehmlich von Perchlorätliylen aus Pentachloräthan, wobei mann unterhalb des Siedepunktes des chlorierten Äthans Kalkmilch und ein feinverteiltes chloriertes Äthan -aufeinander einwirken läßt, bis das chlorierte Äthain praktisch vollkommen in ein Chloräthylen übergeführt ist, dadurch gekennzeichnet, daß die Umsetizung in Gegenwart von Emulgierungsmitteln oder in der Textilindustrie gebräuchlichen Netzmitteln vorgenommen wird. z. Verfahren nach Anspruch i, -dadurch gekennzeichnet, daß mittels einer Emulgiermaschine mit Hilfe -von Emulgierungs- oder Netzmitteln eine Emulsion von einem chlorierten Äthan und Kalkmilch hergestellt wird, worauf die Umsetzung in großen Gefäßren, gegebenenfalls auch ohne mechanische Mischung, vorgenommen wird, Angezogene Druckschriften: Deutsche Patentschrift Nr. 171 900; Ulmann: Enzyklopädie der technischenChemie, II. Aufl., Bd. T, S. @i59/ii6o; Chemisches Zentralblatt igd6II, S. 57i/572.
PATENT CLAIMS: i.- Process for the production of Chloräthvlemen. from chlorinated ethanes, primarily from perchlorethylene from pentachloroethane, with lime milk and a finely divided chlorinated ethane being allowed to act on each other below the boiling point of the chlorinated ethane, until the chlorinated ethane is practically completely converted into a chloroethylene, characterized in that the reaction in the presence of Emulsifying agents or wetting agents commonly used in the textile industry is made. z. Process according to claim i, characterized in that an emulsion of a chlorinated ethane and milk of lime is produced by means of an emulsifying machine with the aid of emulsifying or wetting agents, whereupon the reaction is carried out in large vessels, optionally also without mechanical mixing, Referred publications: German Patent No. 171,900; Ulmann: Encyclopedia of Technical Chemistry, II. Ed., Vol. T, pp. @ I59 / ii6o; Chemisches Zentralblatt igd6II, p. 57i / 572.
DEP18344D 1944-01-11 1944-01-11 Process for the production of chloroethylenes from chlorinated ethanes Expired DE888389C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP18344D DE888389C (en) 1944-01-11 1944-01-11 Process for the production of chloroethylenes from chlorinated ethanes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP18344D DE888389C (en) 1944-01-11 1944-01-11 Process for the production of chloroethylenes from chlorinated ethanes

Publications (1)

Publication Number Publication Date
DE888389C true DE888389C (en) 1953-08-31

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DEP18344D Expired DE888389C (en) 1944-01-11 1944-01-11 Process for the production of chloroethylenes from chlorinated ethanes

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Country Link
DE (1) DE888389C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1088046B (en) * 1954-11-23 1960-09-01 Minnesota Mining & Mfg Process for producing a fluorine-containing olefin
DE1191360B (en) * 1961-01-18 1965-04-22 Dynamit Nobel Ag Process for the continuous production of vinylidene chloride
DE1212513B (en) * 1963-12-23 1966-03-17 Bayer Ag Process and device for the production of 2-chlorobutadiene- (1, 3)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE171900C (en) *

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE171900C (en) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1088046B (en) * 1954-11-23 1960-09-01 Minnesota Mining & Mfg Process for producing a fluorine-containing olefin
DE1191360B (en) * 1961-01-18 1965-04-22 Dynamit Nobel Ag Process for the continuous production of vinylidene chloride
DE1212513B (en) * 1963-12-23 1966-03-17 Bayer Ag Process and device for the production of 2-chlorobutadiene- (1, 3)

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