DE2545656A1 - (3)-Methyl pentanediol bis-chlorocarbonate - is mfd. by phosgenation of the diol and used in polycarbonate prodn. - Google Patents

(3)-Methyl pentanediol bis-chlorocarbonate - is mfd. by phosgenation of the diol and used in polycarbonate prodn.

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Publication number
DE2545656A1
DE2545656A1 DE19752545656 DE2545656A DE2545656A1 DE 2545656 A1 DE2545656 A1 DE 2545656A1 DE 19752545656 DE19752545656 DE 19752545656 DE 2545656 A DE2545656 A DE 2545656A DE 2545656 A1 DE2545656 A1 DE 2545656A1
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DE
Germany
Prior art keywords
diol
chlorocarbonate
phosgenation
mfd
prodn
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.)
Withdrawn
Application number
DE19752545656
Other languages
German (de)
Inventor
Werner Dipl Chem Dr Fliege
Herwig Dipl Chem Dr Hoffmann
Karl Dr Merkel
Herbert Dipl Chem Dr Mueller
Franz Dipl Chem Dr Neumayr
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 DE19752545656 priority Critical patent/DE2545656A1/en
Publication of DE2545656A1 publication Critical patent/DE2545656A1/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
    • C07C69/96—Esters of carbonic or haloformic acids

Abstract

New 3-methyl-pentan-1,5-diol-bis(chlorocarbonate) is of formula Cl-CO-O-(CH2)2-CH(CH3)-(CH2)2-O-CO-Cl (I). (I) is prepd. by phosgenation of 3-methyl-p ntan-1, 5-diol. In an example, 472 pts. (4 mol equivs.) 3-methyl-pentan-1,5-diol were reacted with 1000 pts. phosgene (10 mol equivs.) at 12-16 degrees C in a rotating reactor. The reaction mixt. contg. 20% COCl2, was then allowed to flow to a post-reaction zone where it was degassed at 70 degrees C/70 mbars.

Description

3-Methylpentandiol- 1, 5-bis-chlorkohlensäureester 3-methylpentanediol-1,5-bis-chlorocarbonic acid ester

Die Erfindung betrifft einen neuen Stoff, 3-Methylpentandiol-1,5-bis-chlorkohlensäureester. Die chemische Strukturformel des Stoffs ist Cl-CO-O-(CH2)2-CH-(CH2)2-O-CO-Cl (1).The invention relates to a new substance, 3-methylpentanediol-1,5-bis-chlorocarbonic acid ester. The chemical structural formula of the substance is Cl-CO-O- (CH2) 2-CH- (CH2) 2-O-CO-Cl (1).

(I) kann erhalten werden durch Phosgenierung von 3-Methylpentandiol-1,5--unter geeigneten Bedingungen. Ein geeignetes Verfahren, um diese Reaktion zu bewirken, ist z.B. in den DT-OSen 2 251 206 und 2 453 284 beschrieben.(I) can be obtained by phosgenation of 3-methylpentanediol-1,5 - under suitable conditions. A suitable method to effect this reaction is described, for example, in DT-OSes 2 251 206 and 2 453 284.

3-Methylpentandiol-1,5 ist das Ergebnis der Hydrierung eines entsprechenden Pentendiols, das bei der Anlagerung von 2 Mol Formaldehyd an Isobutylen erhalten wird.3-methylpentanediol-1,5 is the result of the hydrogenation of a corresponding Pentenediol obtained from the addition of 2 moles of formaldehyde to isobutylene will.

Der Chlorkohlensäureester hat folgende Eigenschaften: Bei 20°C farblose Flüssigkeit; Siedepunkt bei etwa 1,3 mbar 130°C. Der Chlorgehalt beträgt 29,18 %.The chlorocarbonic acid ester has the following properties: Colorless at 20 ° C Liquid; Boiling point at about 1.3 mbar 130 ° C. The chlorine content is 29.18%.

Herstellungsbeispiel Der Stoff kann z.B. in der nachstehend vereinfachtbeschriebenen Anlage vorteilhaft hergestellt werden: Über Einspritzleitungen werden einem Umlaufreaktor flüssiges Phosgen und Alkohol zugeführt, wobei die Bewegungsenergie des Produktumlaufs durch die zugeführten Stoffmengen mitgebracht und aufrechterhalten wird. Ein Kühlsystem hält die UmlauStemperatur niedrig. Über aufgesetzte Solekühler wird mitgeführtes Phosgen von freigesetztem Chlorwasserstoff abgetrennt, der Chlorwasserstoff wird anschließend noch mit Chlorkohlensäureester gewaschen. Production example The substance can, for example, be described in simplified form below Plant are advantageously produced: Via injection lines are a circulation reactor liquid phosgene and alcohol supplied, with the kinetic energy of the product circulation brought along by the amount of substance added and sustained will. A cooling system keeps the circulation temperature low. Via attached brine cooler entrained phosgene is separated from released hydrogen chloride, the hydrogen chloride is then washed with chlorocarbonate.

Das ablaufende Reaktionsprodukt gelangt über eine gekühlte Rohrleitung und einen Nachreaktor in ein Puffergefäß, von wo aus es in eine Ausgasvorrichtung geleitet wird.The reaction product running off passes through a cooled pipeline and a post-reactor into a buffer vessel, from where it is fed into an outgassing device is directed.

In die vorstehend beschriebene Anlage, deren Umlaufreaktor 500 Raumteile Nutzinhalt (ausreichend für etwa 700 Gewichtsteile Gemisch) besitzt, wird zunächst Phosgen vorgelegt. Dann werden stündlich 472 Teile 3-Methylpentandiol-1,5 (entsprechend 4 Moläquivalenten) und 1 000 Teile Phosgen (entsprechend 10 Moläquivalenten) zugeführt. Es stellt sich eine Temperatur zwischen 12 und 16 0C ein. Die Temperatur in den Kühlern wird auf -250C gehalten.In the plant described above, the circulation reactor of which is 500 parts Useful content (sufficient for about 700 parts by weight of the mixture) is initially Phosgene presented. Then 472 parts of 3-methylpentanediol-1,5 (corresponding to 4 molar equivalents) and 1,000 parts of phosgene (corresponding to 10 molar equivalents). A temperature between 12 and 16 ° C is established. The temperature in the Cooling is kept at -250C.

Man erhält nach dem Durchlaufen der Nachreaktionszone eine Lösung mit einem Gehalt von etwa 20 ffi Phosgen. Diese Lösung wird bei etwa 700C unter einem Druck von etwa 70 mbar entgast. Die Ausbeute ist im Rahmen der Meßgenautgkeit quantitativ. Der Stoff eignet sich z.B. zur Herstellung von Polycarbonaten.After passing through the post-reaction zone, a solution is obtained with a content of about 20 ffi phosgene. This solution is taking at around 700C degassed at a pressure of about 70 mbar. The yield is within the scope of the measurement accuracy quantitatively. The material is suitable e.g. for the production of polycarbonates.

Claims (1)

Patentanspruch 3-Nethylpentandiol-1,5-bis-chlorkohlensäureester der Formel Cl-CO-O-(CH2)2-C(CH3)-(CH2)2-O-CO-Cl .Claim 3-Nethylpentanediol-1,5-bis-chlorocarbonic acid ester Formula Cl-CO-O- (CH2) 2-C (CH3) - (CH2) 2-O-CO-Cl.
DE19752545656 1975-10-11 1975-10-11 (3)-Methyl pentanediol bis-chlorocarbonate - is mfd. by phosgenation of the diol and used in polycarbonate prodn. Withdrawn DE2545656A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752545656 DE2545656A1 (en) 1975-10-11 1975-10-11 (3)-Methyl pentanediol bis-chlorocarbonate - is mfd. by phosgenation of the diol and used in polycarbonate prodn.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752545656 DE2545656A1 (en) 1975-10-11 1975-10-11 (3)-Methyl pentanediol bis-chlorocarbonate - is mfd. by phosgenation of the diol and used in polycarbonate prodn.

Publications (1)

Publication Number Publication Date
DE2545656A1 true DE2545656A1 (en) 1977-04-21

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ID=5958934

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752545656 Withdrawn DE2545656A1 (en) 1975-10-11 1975-10-11 (3)-Methyl pentanediol bis-chlorocarbonate - is mfd. by phosgenation of the diol and used in polycarbonate prodn.

Country Status (1)

Country Link
DE (1) DE2545656A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010710A1 (en) * 1978-11-02 1980-05-14 Bayer Ag Process for the production of methyl chloroformate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010710A1 (en) * 1978-11-02 1980-05-14 Bayer Ag Process for the production of methyl chloroformate

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