DE923913C - Process for the preparation of ketoximes - Google Patents

Process for the preparation of ketoximes

Info

Publication number
DE923913C
DE923913C DEB21263A DEB0021263A DE923913C DE 923913 C DE923913 C DE 923913C DE B21263 A DEB21263 A DE B21263A DE B0021263 A DEB0021263 A DE B0021263A DE 923913 C DE923913 C DE 923913C
Authority
DE
Germany
Prior art keywords
salts
ketoximes
preparation
parts
thiosulfuric acid
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
DEB21263A
Other languages
German (de)
Inventor
Heinrich Dr Hopff
Otto Von Dr Schickh
Hans-Joachim Dr Riedl
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to DEB21263A priority Critical patent/DE923913C/en
Application granted granted Critical
Publication of DE923913C publication Critical patent/DE923913C/en
Expired legal-status Critical Current

Links

Landscapes

  • Materials For Photolithography (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

Verfahren zur Herstellung von Ketoximen Im Patent c921 752 ist ein Verfahren zur Herstellung von Ketoximen beschrieben, bei dem man sekundäre aliphatische oder cycloaliphatische Nitroverbindungen in Form ihrer Salze oder der freien aci-Formen in saurem Medium mit Thioschwefelsäure bzw. ihren wasserlöslichen Salzen umsetzt.Process for the preparation of ketoximes In patent c921 752 is a Process for the preparation of ketoximes described in which one secondary aliphatic or cycloaliphatic nitro compounds in the form of their salts or the free aci forms Reacts in an acidic medium with thiosulfuric acid or its water-soluble salts.

Es wurde nun gefunden, daß man bei diesem Verfahren an Stelle von Thiosch-,vefelsäure bzw. ihren Salzen auch solche Reaktionsgemische verwenden kann, aus denen sich in an sich bekannter Weise Thioschwefelsäure bzw. ihre Salze bilden können. Solche Reaktionsgemische bestehen z. B. aus etwa äquivalenten Mengen von wasserlöslichen Sulfiten und Schwefel, von Sulfiden und Schwefeldioxyd, von Sulfiden und Polythionaten oder von Polythionaten und Alkalien. Die Bildung der Thioschwefelsäure bzw. ihrer Salze erfolgt hierbei in Gegenwart der Nitroverbindungen bzw. ihrer Salze. Im übrigen vollzieht man die- Umwandlung der Nitroverbindungen in die gewünschten Oxime in der im Hauptpatent beschriebenen Weise, indem man das gesamte Gemisch auf einen sauren pH-Wert bringt bzw. einen solchen durch laufende oder wiederholte Zugabe von z. B. Mineralsäure aufrechterhält.It has now been found that instead of Thioschic acid, vefelsic acid or its salts can also use such reaction mixtures, from which thiosulphuric acid or its salts are formed in a manner known per se can. Such reaction mixtures exist z. B. from approximately equivalent amounts of water-soluble sulphites and sulfur, of sulphides and sulfur dioxide, of sulphides and polythionates or of polythionates and alkalis. The formation of thiosulfuric acid or their salts are carried out in the presence of the nitro compounds or their salts. Otherwise, the conversion of the nitro compounds into the desired ones is carried out Oxime in the manner described in the main patent by adding the entire mixture brings about an acidic pH value or one through continuous or repeated addition from Z. B. maintains mineral acid.

Alle Varianten des Verfahrens des Hauptpatents sind auch bei der hier beschriebenen Ausführungsform anwendbar. Die in dem Beispiel genannten Teile sind Gewichtsteile.All variants of the process of the main patent are also here described embodiment applicable. The ones mentioned in the example Parts are parts by weight.

Beispiel Man gibt zu einer Lösung von 64,5 Teilen Nitrocyclohexan in 235 Teilen 9°/niger Natronlauge 252 Teile kristallisiertes Natriumsulfit, 32 Teile Schwefelpulver und Zoo Teile Wasser und schüttelt das Gemisch bei gewöhnlicher Temperatur, bis der Schwefel völlig gelöst ist. Dann läßt man die nötigenfalls filtrierte Lösung bei etwa 2o° unter kräftigem Rühren in goo Teile 2 n-Schwefelsäure einlaufen. Dabei kristallisiert bereits ein erheblicher Anteil des entstandenen Cyclohexanonoxims aus. Man neutralisiert mit Natriumcarbonatlösung und saugt das Oxim ab. Aus dem Filtrat kann man durch Extrahieren, z. B. mit Äther, weitere Mengen Oxim gewinnen. Die Gesamtausbeute beträgt 50 bis 52 Teile reines Cyclohexanonoxim, entsprechend rund 9o °/u der Theorie, berechnet auf angewendetes Nitrocyclohexan.EXAMPLE 252 parts of crystallized sodium sulfite, 32 parts of powdered sulfur and zoo parts of water are added to a solution of 64.5 parts of nitrocyclohexane in 235 parts of 9% sodium hydroxide solution, and the mixture is shaken at ordinary temperature until the sulfur is completely dissolved. The solution, filtered if necessary, is then allowed to run into 2o parts of 2N sulfuric acid at about 20 ° with vigorous stirring. A considerable proportion of the resulting cyclohexanone oxime crystallizes out. It is neutralized with sodium carbonate solution and the oxime is filtered off with suction. From the filtrate can be extracted by extracting, for. B. with ether, gain additional amounts of oxime. The total yield is 50 to 52 parts of pure cyclohexanone oxime, corresponding to around 90 ° / u of theory, calculated on the nitrocyclohexane used.

Claims (1)

PATENTANSPRUCH: Weiterbildung des Verfahrens des Patents 921 752 zur Herstellung von Ketoximen durch Umsetzen von sekundären aliphatischen oder cycloaliphatischen Nitroverbindungen in Form ihrer Salze oder der freien aci-Formen mit Thioschwefelsäure bzw. ihren wasserlöslichen Salzen in saurem Medium, dadurch gekennzeichnet, daß man hier an Stelle von Thioschwefelsäure bzw. ihren Salzen solche Reaktionsgemische verwendet, aus denen sich in an sich bekannter Weise Thioschwefelsäure bzw. deren Salze bilden können.PATENT CLAIM: Further development of the process of patent 921 752 for the preparation of ketoximes by reacting secondary aliphatic or cycloaliphatic nitro compounds in the form of their salts or the free aci forms with thiosulfuric acid or its water-soluble salts in an acidic medium, characterized in that one takes place here of thiosulfuric acid or its salts, those reaction mixtures are used from which thiosulfuric acid or its salts can be formed in a manner known per se.
DEB21263A 1952-07-20 1952-07-20 Process for the preparation of ketoximes Expired DE923913C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB21263A DE923913C (en) 1952-07-20 1952-07-20 Process for the preparation of ketoximes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB21263A DE923913C (en) 1952-07-20 1952-07-20 Process for the preparation of ketoximes

Publications (1)

Publication Number Publication Date
DE923913C true DE923913C (en) 1955-02-24

Family

ID=6960584

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB21263A Expired DE923913C (en) 1952-07-20 1952-07-20 Process for the preparation of ketoximes

Country Status (1)

Country Link
DE (1) DE923913C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1021358B (en) * 1955-01-13 1957-12-27 Basf Ag Process for the preparation of oximes
FR2504482A1 (en) * 1981-04-22 1982-10-29 Skirail Sa Security circuit for cable operated transport system - uses interrupters along security line, with resistors in parallel with each interrupter so that fault is readily located

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1021358B (en) * 1955-01-13 1957-12-27 Basf Ag Process for the preparation of oximes
FR2504482A1 (en) * 1981-04-22 1982-10-29 Skirail Sa Security circuit for cable operated transport system - uses interrupters along security line, with resistors in parallel with each interrupter so that fault is readily located

Similar Documents

Publication Publication Date Title
DE923913C (en) Process for the preparation of ketoximes
DE915334C (en) Process for the production of bis (ª ‰ -oxyalkyl) -polysulfiden
DE855254C (en) Process for the preparation of oximes
DE855253C (en) Process for the preparation of oximes
DE611397C (en) Process for the preparation of water-soluble zinc compounds of oxymethanesulfinic acid
DE2055494A1 (en) Process for the preparation of thiobisphenols
DE947968C (en) Process for the preparation of ketoximes
DE548813C (en) Process for the production of diacetone alcohol
DE962333C (en) Process for the preparation of cyclohexanone oxime
DE865444C (en) Process for making urethanes
DE1115414B (en) X-ray contrast media
DE551145C (en) Process for the preparation of iodomethanesulfonic acid or its salts
AT131129B (en) Process for the preparation of carbamic acid esters.
DE607535C (en) Process for the preparation of sulfonic acids of the diaminodiphenyl series
DE679711C (en) Process for the production of ethersic acids
AT145204B (en) Process for the preparation of tetrazoles.
DE924803C (en) Process for the preparation of dimethylol acetone and its homologues
DE923129C (en) Process for the preparation of thiourea clusters of 4-amino-2-oxybenzoic acid
AT203014B (en) Process for the production of new bis-sulfonylureas
DE729341C (en) Process for the production of asymmetric arsenobenzenes of the urea series
DE875201C (en) Process for the preparation of substituted aryl vinyl sulfones
AT143315B (en) Process for the preparation of quinoline derivatives.
DE875361C (en) Process for the preparation of oxyphenyl-serines
AT277247B (en) Process for the preparation of the disulfur acid ester salts of 4,4'-DIHYDROXY-DIPHENYL- (2 "-PYRIDYL) -METHANE
AT112126B (en) Process for the preparation of derivatives of cyclic aminometal mercapto compounds.