GB834250A - Manufacture of aromatic disulphonic acids - Google Patents

Manufacture of aromatic disulphonic acids

Info

Publication number
GB834250A
GB834250A GB2270956A GB2270956A GB834250A GB 834250 A GB834250 A GB 834250A GB 2270956 A GB2270956 A GB 2270956A GB 2270956 A GB2270956 A GB 2270956A GB 834250 A GB834250 A GB 834250A
Authority
GB
United Kingdom
Prior art keywords
disulphonate
sodium
give
sulphonate
diphenyl
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
GB2270956A
Inventor
Isaac Goodman
Robert Alexander Edington
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB2270956A priority Critical patent/GB834250A/en
Priority to CH4870057A priority patent/CH363337A/en
Priority to ES0236699A priority patent/ES236699A1/en
Publication of GB834250A publication Critical patent/GB834250A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C303/00—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
    • C07C303/32—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of salts of sulfonic acids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Benzene - 1,4 -, naphthalene - 2,6 - and diphenyl-4,41-disulphonic acids are prepared in the form of their alkali metal salts by heating an alkali-metal salt of a benzene, naphthalene or diphenyl mono-sulphonic acid at 250 DEG C. or above. The invention also includes terephthalic acid, terephthalonitrile and high molecular weight polysulphonamides when prepared from these aromatic disulphonic acids obtained as above. The heating may take place at normal or superatmospheric pressures, preferably in an atmosphere of carbon dioxide or argon. The reaction will take place above 250 DEG C. but in the absence of a heavy metal catalyst a temperature of 425 DEG C. is generally needed, an upper limit of 600 DEG C. is mentioned. Catalysts containing chromium, mercury, vanadium and silver may be used. The potassium or preferably the sodium salt is used and the free acid may be obtained from the crude disulphonate by contacting with a cation-exchange resin. In examples: (1)-(8) and (14) sodium and (9) potassium benzene sulphonate is heated under various conditions to give the 1:4-disulphonate; (10) potassium and (11) sodium naphthalene-b -sulphonate is heated with cadmium dust to give the 2 : 6-disulphonate, (12) sodium naphthalene-a -sulphonate is heated to give the 2:6-disulphonate; (13) sodium diphenyl-4-sulphonate is heated to give a diphenyl-4:41-disulphonate.
GB2270956A 1956-07-23 1956-07-23 Manufacture of aromatic disulphonic acids Expired GB834250A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB2270956A GB834250A (en) 1956-07-23 1956-07-23 Manufacture of aromatic disulphonic acids
CH4870057A CH363337A (en) 1956-07-23 1957-07-22 Process for the preparation of aromatic disulfonic acids
ES0236699A ES236699A1 (en) 1956-07-23 1957-07-22 Manufacture of aromatic disulphonic acids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2270956A GB834250A (en) 1956-07-23 1956-07-23 Manufacture of aromatic disulphonic acids

Publications (1)

Publication Number Publication Date
GB834250A true GB834250A (en) 1960-05-04

Family

ID=10183844

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2270956A Expired GB834250A (en) 1956-07-23 1956-07-23 Manufacture of aromatic disulphonic acids

Country Status (2)

Country Link
ES (1) ES236699A1 (en)
GB (1) GB834250A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357281A (en) * 1978-05-30 1982-11-02 The Dow Chemical Company Alkylated biphenylyl phenyl ether sulfonates

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357281A (en) * 1978-05-30 1982-11-02 The Dow Chemical Company Alkylated biphenylyl phenyl ether sulfonates

Also Published As

Publication number Publication date
ES236699A1 (en) 1958-03-16

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