DE2148549C3 - Process for the preparation of 2-chlorathosphonic acid - Google Patents

Process for the preparation of 2-chlorathosphonic acid

Info

Publication number
DE2148549C3
DE2148549C3 DE19712148549 DE2148549A DE2148549C3 DE 2148549 C3 DE2148549 C3 DE 2148549C3 DE 19712148549 DE19712148549 DE 19712148549 DE 2148549 A DE2148549 A DE 2148549A DE 2148549 C3 DE2148549 C3 DE 2148549C3
Authority
DE
Germany
Prior art keywords
acid
preparation
chloroethane
chlorathosphonic
temperatures
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
DE19712148549
Other languages
German (de)
Other versions
DE2148549A1 (en
DE2148549B2 (en
Inventor
Karl Rehn
Otto Schaeffner
Gerhard Staehler
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.)
Hoechst AG
Original Assignee
Hoechst 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 Hoechst AG filed Critical Hoechst AG
Priority to DE19712148549 priority Critical patent/DE2148549C3/en
Priority to CS8549A priority patent/CS167336B2/cs
Priority to CH1812071A priority patent/CH569031A5/xx
Priority to GB5746971A priority patent/GB1373513A/en
Priority to NL7116981A priority patent/NL7116981A/xx
Priority to IT32311/71A priority patent/IT943888B/en
Priority to IL38340A priority patent/IL38340A/en
Priority to JP46100789A priority patent/JPS594440B1/ja
Priority to CA130,083A priority patent/CA942316A/en
Priority to RO69049A priority patent/RO60363A/ro
Priority to FR7144825A priority patent/FR2118579A5/fr
Priority to BE776735A priority patent/BE776735A/en
Publication of DE2148549A1 publication Critical patent/DE2148549A1/en
Priority to US05/871,550 priority patent/US4322371A/en
Publication of DE2148549B2 publication Critical patent/DE2148549B2/en
Application granted granted Critical
Publication of DE2148549C3 publication Critical patent/DE2148549C3/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F9/00Compounds containing elements of Groups 5 or 15 of the Periodic System
    • C07F9/02Phosphorus compounds
    • C07F9/28Phosphorus compounds with one or more P—C bonds
    • C07F9/38Phosphonic acids RP(=O)(OH)2; Thiophosphonic acids, i.e. RP(=X)(XH)2 (X = S, Se)
    • C07F9/3804Phosphonic acids RP(=O)(OH)2; Thiophosphonic acids, i.e. RP(=X)(XH)2 (X = S, Se) not used, see subgroups
    • C07F9/3808Acyclic saturated acids which can have further substituents on alkyl

Description

1515th

Zusatz zu Patent 20 61 610,8 und zu Patent 2134346,4.Addition to patent 20 61 610.8 and patent 2134346.4.

Gegenstand des Patents 2061610,8 ist ein Verfahren zur Herstellung von 2-Chloräthanphosphonsäure, das dadurch gekennzeichnet ist, daß man, vorzugsweise in einem Lösungsmittel, Phosphortrichlorid bei Temperaturen zwischen +10° und +50°C mit Äthylenoxyd zu Tris-2-chloräthylphosphit umsetzt, dieses ohne weitere Reinigung bei Temperaturen von 140°-200°C zu 2-Chloräthanphosphonsäure-bis-2-chloräthylester umlagert und das so erhaltene Rohprodukt ohne weitere Reinigung mit 50-500 Gew.-% an konzentrierter Salzsäure bei Temperaturen oberhalb 1000C unter Druck und Abdestillieren des entstehenden 1,2-Dichloräthans zu 2-Chloräthanphosphonsäure spaltet.The subject of patent 2061610.8 is a process for the preparation of 2-chloroethane phosphonic acid, which is characterized in that, preferably in a solvent, phosphorus trichloride is reacted with ethylene oxide at temperatures between + 10 ° and + 50 ° C to give tris-2-chloroethyl phosphite this without further purification at temperatures of 140 ° -200 ° C to 2-Chloräthanphosphonsäure-bis-2-chloräthylester rearranges and the crude product so obtained without further purification with 50-500 wt .-% of concentrated hydrochloric acid at temperatures above 100 0 C. splits under pressure and distilling off the resulting 1,2-dichloroethane to give 2-chloroethane phosphonic acid.

Gegenstand des Zusatzpatents 2134346,4 ist ein Verfahren zur Herstellung von 2-Chloräthanphosphonsäure, bei welchem der rohe 2-ChIoräthanphosphonsäure-bis-2-chloräthylester mit Chlorwasserstoff in Gegenwart von 0,1-31 Gew.-% Wasser, bezogen auf das eingesetzte rohe Vorprodukt, gespalten wird.The subject of the additional patent 2134346.4 is a process for the preparation of 2-chloroethane phosphonic acid, in which the crude 2-chloroethane phosphonic acid bis-2-chloroethyl ester is cleaved with hydrogen chloride in the presence of 0.1-31% by weight of water, based on the crude precursor used.

Beide Anmeldungen nennen in der allgemeinen Verfahrensbeschreibung und den Verfahrensbeispielen als Reaktionstemperaturen bei der Spaltung des --ohen 2-Chloräthanphosphonsäureesters 110°-160'C, vor- 4» zugsweise 120°-140 C.Both registrations are mentioned in the general description of the procedure and the process examples as reaction temperatures for the cleavage of the --ohen 2-chloroethane phosphonic acid ester 110 ° -160'C, before- 4 » preferably 120 ° -140 C.

Es wurde nun gefunden, daß man die Herstellung von 2-Chloräthanphosphonsäure gemäß Hauptpatent und Zusatzpatint durchfuhren kann, indem man die Spaltung des rohen 2-Chloräthanphosphonsäure-bis-2-chloräthylesters bei Temperaturen zwischen 160° und 2003C durchführtIt has now been found that, by drove the preparation of 2-Chloräthanphosphonsäure according to the main patent and Zusatzpatint by the crude 2-Chloräthanphosphonsäure-bis-2-chloräthylesters carries out the cleavage at temperatures between 160 ° C and 200 3

Beispielexample

In einem 150Liter fassenden, innen emaillierten Druckkessel, der mit einem über einen Hahn mit einem Auffanggefäß verbundenen, innen emaillierten Rückflußkühler verbunden ist, werden 100 kg roher 2-Chloräthanphosphonsäure-bis-2-chloräthylester und 5 kg konzentrierte Salzsäure unter Rühren auf dis Reaktionstemperatur erhitzt. Dabei wird durch Einleitung von Chlorwasserstoffgas unter Abdestillieren des entstandenen Dichloräthans ein HCl-Überdruck erzeugt und durch Nachgasen von Chlorwasserstoff bis zur Beendigung der Dichloräthanbildung aufrechterhalten. Das Reaktionsgemisch wird noch weitere 3 Stunden auf die Reaktionstemperatur erhitzt Dann wird die Kesselbeheizung abgestellt, der überschüssige Chlorwasserstoff abgelassen und das im Reaktionsgemisch enthaltene Wasser im Vakuum abdestilliert Schließlich wird der restliche, im Reaktionsgemisch noch vorhandene Chlorwasserstoff durch einstündiges Durchblasen von Stickstoff entfernt.In a 150 liter, internally enamelled pressure vessel, which is connected to a tap with a 100 kg of crude 2-chloroethane-bis-2-chloroethyl ester are connected to the collecting vessel and are connected to the inside enamelled reflux condenser and heated 5 kg of concentrated hydrochloric acid to the reaction temperature with stirring. In doing so, by introduction of hydrogen chloride gas while distilling off the resulting dichloroethane generates an HCl overpressure and maintained by gassing with hydrogen chloride until the end of the dichloroethane formation. The reaction mixture is heated to the reaction temperature for a further 3 hours. The boiler is then heated turned off, drained the excess hydrogen chloride and contained in the reaction mixture Water distilled off in vacuo Finally, the remainder still present in the reaction mixture is removed Removed hydrogen chloride by bubbling nitrogen through it for one hour.

In der nachfolgenden Tabelle sind Temperaturen, Reaktionszeiten, Chlorwasserstoffverbrauch, Ausbeuten und Reingehalt des Reaktionsproduktes von verschiedenen Versuchen zusammengefaßt, die mit einem Ausgangsmaterial durchgeführt wurden, das 62% reinen 2-Chloräthanphosphonsäure-bis-2-chloräthylester enthielt.The table below shows the temperatures, reaction times, consumption of hydrogen chloride and yields and the purity of the reaction product from various tests combined with a Starting material was carried out, the 62% pure 2-chloroethane-bis-2-chloroethyl ester contained.

Reakt.-Reaction Reakt.-Reaction MCl-MCl- Ausbeuteyield Reinheit inPurity in Temp.Temp. ZeitTime Verbrauchconsumption % 2-Chlor-% 2-chlorine- äthanphos-ethanphos phonsäurephonic acid "C"C Std.Hours. kgkg kgkg 160160 2020th 3434 55,555.5 9696 170170 1515th 3535 53,553.5 9494 180180 1414th 3636 5353 9191 190190 1313th 3434 5353 9090

Claims (1)

Patentanspruch:Claim: Verfahren zur Herstellung von 2-Chloräthanphosphonsäure durch Spaltung von rohem 2-Chloräthanphosphoasäure-bis-2-ch]oräthylester mit konzentrierter Salzsäure gemäß Patent 20 61610,8 bzw. mit gasförmigem Chlorwasserstoff in Gegenwart von 0,1-31 Gewichtsprozent Wasser gemäß Patent 2134346.4, dadurch gekennzeichnet, daß man die Spaltung bei Temperaturen zwischen 160° und 200' C durchführtProcess for the production of 2-chloroethane phosphonic acid by cleavage of crude 2-chloroethane phosphoic acid bis-2-ch] oräthylester with concentrated hydrochloric acid according to patent 20 61610.8 or with gaseous hydrogen chloride in the presence of 0.1-31 percent by weight of water according to the patent 2134346.4, characterized in that the cleavage is carried out at temperatures between 160 ° and 200 ° C 1010
DE19712148549 1970-12-15 1971-09-29 Process for the preparation of 2-chlorathosphonic acid Expired DE2148549C3 (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
DE19712148549 DE2148549C3 (en) 1971-09-29 1971-09-29 Process for the preparation of 2-chlorathosphonic acid
CS8549A CS167336B2 (en) 1970-12-15 1971-12-08
GB5746971A GB1373513A (en) 1970-12-15 1971-12-10 Process for the manufacture of 2-chloroethane-phosphonic acid
NL7116981A NL7116981A (en) 1970-12-15 1971-12-10
CH1812071A CH569031A5 (en) 1970-12-15 1971-12-10
IL38340A IL38340A (en) 1970-12-15 1971-12-13 Process for the manufacture of 2-chloroethane-phosphonic acid
IT32311/71A IT943888B (en) 1970-12-15 1971-12-13 PROCESS FOR THE PREPARATION OF 2 CHLOROETANFOSFONIC ACID
JP46100789A JPS594440B1 (en) 1970-12-15 1971-12-14
CA130,083A CA942316A (en) 1970-12-15 1971-12-14 Process for the manufacture of 2-chloroethane-phosphonic acid
RO69049A RO60363A (en) 1970-12-15 1971-12-14
FR7144825A FR2118579A5 (en) 1970-12-15 1971-12-14
BE776735A BE776735A (en) 1970-12-15 1971-12-15 PROCESS FOR PREPARING 2-CHLORO-ETHANE- PHOSPHONIC ACID
US05/871,550 US4322371A (en) 1970-12-15 1978-01-23 Process for the manufacture of 2-chloroethane-phosphonic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712148549 DE2148549C3 (en) 1971-09-29 1971-09-29 Process for the preparation of 2-chlorathosphonic acid

Publications (3)

Publication Number Publication Date
DE2148549A1 DE2148549A1 (en) 1973-04-05
DE2148549B2 DE2148549B2 (en) 1979-06-07
DE2148549C3 true DE2148549C3 (en) 1980-06-04

Family

ID=5820888

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19712148549 Expired DE2148549C3 (en) 1970-12-15 1971-09-29 Process for the preparation of 2-chlorathosphonic acid

Country Status (1)

Country Link
DE (1) DE2148549C3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4728466A (en) * 1985-10-18 1988-03-01 Rhone-Poulenc Nederland B.V. Process for the production of aliphatic phosphonic acids

Also Published As

Publication number Publication date
DE2148549A1 (en) 1973-04-05
DE2148549B2 (en) 1979-06-07

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Legal Events

Date Code Title Description
OD Request for examination
C3 Grant after two publication steps (3rd publication)
8340 Patent of addition ceased/non-payment of fee of main patent