DE849406C - Process for the preparation of alkali salts of aromatic dicarboxylic acids - Google Patents

Process for the preparation of alkali salts of aromatic dicarboxylic acids

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Publication number
DE849406C
DE849406C DEB12751A DEB0012751A DE849406C DE 849406 C DE849406 C DE 849406C DE B12751 A DEB12751 A DE B12751A DE B0012751 A DEB0012751 A DE B0012751A DE 849406 C DE849406 C DE 849406C
Authority
DE
Germany
Prior art keywords
dicarboxylic acids
parts
preparation
aromatic dicarboxylic
alkali salts
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
DEB12751A
Other languages
German (de)
Inventor
Eugen Dr Immendoerfer
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 DEB12751A priority Critical patent/DE849406C/en
Application granted granted Critical
Publication of DE849406C publication Critical patent/DE849406C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/41—Preparation of salts of carboxylic acids
    • C07C51/412—Preparation of salts of carboxylic acids by conversion of the acids, their salts, esters or anhydrides with the same carboxylic acid part

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polyesters Or Polycarbonates (AREA)

Description

Verfahren zur Herstellung von Alkalisalzen aromatischer Dicarbonsäuren Um .llkalisalze aromatischerDicarbonsäuren aus deren Anhydriden, z. B. das Mono- oder das Di- natriumsalz der Plithalsäure, herzustellen, verfuhr man bisher so, daß man das entsprechende Säure- anlrvdrid, z. l). Plrtlralsätireanhydrid, mit wäßrigen All:alicarbonatlösurrgen verkochte. Bei der tech- nischen Ausführung dieses Verfahrens ergeben sieh Schwierigkeiten durch starkes Schäumen und dic lange Dauer des Lösevorganges; man muß zur l.iisun der letzter Mengen des Säureanhvdrids sehr lange erw;irmen, und häufig treten auch Kor- rosionen der Gefäße ein. I's wurde nun gefunden, daß man in einfacher Weise rasch und ohne Zufuhr von Wärme Zlono- oder Dinatriumsalze von Dicarbonsäuren erhält, wenn man Gemische aus i Mol Dicarbonsäureanhydrid und r/2 bzw. i Mol wasserfreiem Natriumcarbonat mit etwa 5 bzw. io Mol Wasser verrührt.Process for the preparation of alkali salts of aromatic dicarboxylic acids To .llkali salts of aromatic dicarboxylic acids from their anhydrides, e.g. B. the mono- or di- the sodium salt of plithalic acid, proceeded so far that one has the corresponding acid anlrvdrid, e.g. l). Plrtlralsätireanhydrid, with aqueous All: alicarbonate solution boiled away. In the tech- niche execution of this procedure see difficulties from excessive foaming and the long duration of the dissolving process; one has to l.iisun of the last amounts of acid anhydride warm for a long time, and correspondence often occurs rosions of the vessels. I've now found that it's easier to get into Way quickly and without the application of heat Zlono- or disodium salts of dicarboxylic acids are obtained when mixtures of 1 mole of dicarboxylic acid anhydride and ½ or 1 mole of anhydrous sodium carbonate are stirred with about 5 or 10 moles of water.

Die in den Beispielen genannten Teile sind Gewichtsteile.The parts mentioned in the examples are parts by weight.

Beispiel i Man übergießt in einem verhältnismäßig flachen Gefäß ein Gemisch aus 58,3 Teilen Phthalsäureanhydrid und 41,7 Teilen calciniertem Natriumcarbonat unter Rühren mit 71 Teilen Wasser. Es bildet sich unter Aufschäumen ein dicker Brei. Nach etwa 2 Stunden kann man das entstandene Dinatriumsalz der Phtha_ lsäure durch Zusatz von kaltem Wasser völlig in Lösung bringen.Example i Pour over into a relatively shallow vessel Mixture of 58.3 parts of phthalic anhydride and 41.7 parts of calcined sodium carbonate with stirring with 71 parts of water. A thick paste forms with foaming. After about 2 hours you can see the result Disodium salt of phtha_ Bring oleic acid completely into solution by adding cold water.

Beispiel e Man versetzt ein Gemisch aus 74 Teilen Phthalsäureanhydrid und 26,5 Teilen calciniertem Natriumcarbonat wie im Beispiel i mit 45 Teilen Wasser. Dabei entsteht ein Kristallbrei von Mononatriumphtlialat, das bei Zugabe von mehr Wasser klar löslich ist.Example e A mixture of 74 parts of phthalic anhydride is added and 26.5 parts of calcined sodium carbonate as in Example i with 45 parts of water. This creates a crystal slurry of monosodium thialate, which when more Water is clearly soluble.

Beispiel 3 Man mischt i.98Teile Naphthalsäureanhydrid mit io6 Teilen calciniertemNatriumcarbonat, übergießt das Gemisch mit i8o Teilen Wasser und rührt einige Stunden, bis der entstandene Brei von naphthalsaurem Natrium klar wasserlöslich ist. Beispiel 4 224 Teile Diphenyl-o, o'-dicarl>onsäureanhydrid werden mit io-6 Teilen calciniertem Natriumcarbonat gemischt und wie im l'eispiel 3 mit i8o Teilen Wasser verrührt. Man erhält nach kurzer Zeit das klar lösliche Dinatriumsalz der Dil)lienyl-o, o'-dicarbonsäure.EXAMPLE 3 98 parts of naphthalic anhydride are mixed with 10 6 parts of calcined sodium carbonate, 80 parts of water are poured over the mixture and the mixture is stirred for a few hours until the resulting paste of sodium naphthalic acid is clearly soluble in water. Example 4 224 parts of diphenyl-o, o'-dicarlonic anhydride are mixed with 10 -6 parts of calcined sodium carbonate and, as in Example 3, stirred with 180 parts of water. The clearly soluble disodium salt of Dil) lienyl-o, o'-dicarboxylic acid is obtained after a short time.

Claims (1)

P A T E N T A N S F R I. (. 11: Verfahren zur Herstellung von Alkalisalzen aromatischer Dicarbonsäuren durch Behandeln ihrer Anhydride mit Alkalien, dadurch gekennzeichnet, daß man i Mol des Säureanhydrids mit '/2 bzw. i Mol wasserfreiem Natriumcarbonat mischt und das Gemisch mit etwa 5 bzw. io Mol Wasser verrührt. PATE N TANSFR I. (. 11: Process for the preparation of alkali salts of aromatic dicarboxylic acids by treating their anhydrides with alkalis, characterized in that one mole of the acid anhydride is mixed with 1/2 or i mole of anhydrous sodium carbonate and the mixture with about 5 or 10 mol of water stirred.
DEB12751A 1950-12-01 1950-12-01 Process for the preparation of alkali salts of aromatic dicarboxylic acids Expired DE849406C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB12751A DE849406C (en) 1950-12-01 1950-12-01 Process for the preparation of alkali salts of aromatic dicarboxylic acids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB12751A DE849406C (en) 1950-12-01 1950-12-01 Process for the preparation of alkali salts of aromatic dicarboxylic acids

Publications (1)

Publication Number Publication Date
DE849406C true DE849406C (en) 1952-09-15

Family

ID=6957268

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB12751A Expired DE849406C (en) 1950-12-01 1950-12-01 Process for the preparation of alkali salts of aromatic dicarboxylic acids

Country Status (1)

Country Link
DE (1) DE849406C (en)

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