GB853156A - Improvements in or relating to the production of m-sulphoisophthalic acid - Google Patents

Improvements in or relating to the production of m-sulphoisophthalic acid

Info

Publication number
GB853156A
GB853156A GB33671/58A GB3367158A GB853156A GB 853156 A GB853156 A GB 853156A GB 33671/58 A GB33671/58 A GB 33671/58A GB 3367158 A GB3367158 A GB 3367158A GB 853156 A GB853156 A GB 853156A
Authority
GB
United Kingdom
Prior art keywords
acid
sulphoisophthalic acid
relating
production
sulphoisophthalic
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
GB33671/58A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB853156A publication Critical patent/GB853156A/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
    • C07C303/02—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof
    • C07C303/04—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof by substitution of hydrogen atoms by sulfo or halosulfonyl groups
    • C07C303/06—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof by substitution of hydrogen atoms by sulfo or halosulfonyl groups by reaction with sulfuric acid or sulfur trioxide

Abstract

Meta-sulphoisophthalic acid is prepared by mixing solid isophthalic acid and liquid sulphur trioxide and heating the mixture under substantially atmospheric pressure to a temperature above 160 DEG C., preferably 200 DEG -260 DEG C., until the isophthalic acid is substantially completely sulphonated. Equimolar amounts of the reactants may be used but preferably a slight excess of sulphur trioxide is used. The product of the process is substantially pure M-sulphoisophthalic acid. Batch and continuous versions of the process are specified in Examples.
GB33671/58A 1957-10-21 1958-10-21 Improvements in or relating to the production of m-sulphoisophthalic acid Expired GB853156A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US853156XA 1957-10-21 1957-10-21

Publications (1)

Publication Number Publication Date
GB853156A true GB853156A (en) 1960-11-02

Family

ID=22190791

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33671/58A Expired GB853156A (en) 1957-10-21 1958-10-21 Improvements in or relating to the production of m-sulphoisophthalic acid

Country Status (1)

Country Link
GB (1) GB853156A (en)

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