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GB462664A - Manufacture of 2:6-dimethylnaphthalene-8-sulphonic acid - Google Patents

Manufacture of 2:6-dimethylnaphthalene-8-sulphonic acid

Info

Publication number
GB462664A
GB462664A GB2495635A GB2495635A GB462664A GB 462664 A GB462664 A GB 462664A GB 2495635 A GB2495635 A GB 2495635A GB 2495635 A GB2495635 A GB 2495635A GB 462664 A GB462664 A GB 462664A
Authority
GB
United Kingdom
Prior art keywords
dimethylnaphthalene
sulphuric acid
acid
sulphochloride
treating
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
GB2495635A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB2495635A priority Critical patent/GB462664A/en
Publication of GB462664A publication Critical patent/GB462664A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof

Landscapes

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

Abstract

2 : 6 - Dimethylnaphthalene-8-sulphonic acid is prepared by treating 2 : 6-dimethylnaphthalene with a sulphonating agent in the presence of an indifferent solvent at a temperature up to about 50 DEG C. Solvents specified are o-dichlorobenzene, trichlorobenzene, trichloroethylene, chloroform, carbon tetrachloride, tetrachlorethane, benzine and nitrobenzene. The product, which is a dyestuff intermediate, may be converted into 2 : 6-dimethyl-8-naphthol by melting with caustic alkali, or into the sulphochloride by treating its sodium salt with phosphorus pentachloride; from the sulphochloride, the sulphamide may be obtained by reaction with ammonia. Examples are given of the sulphonation with chlorosulphonic acid, sulphuric acid monohydrate, concentrated sulphuric acid and fuming sulphuric acid.
GB2495635A 1935-09-07 1935-09-07 Manufacture of 2:6-dimethylnaphthalene-8-sulphonic acid Expired GB462664A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2495635A GB462664A (en) 1935-09-07 1935-09-07 Manufacture of 2:6-dimethylnaphthalene-8-sulphonic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2495635A GB462664A (en) 1935-09-07 1935-09-07 Manufacture of 2:6-dimethylnaphthalene-8-sulphonic acid

Publications (1)

Publication Number Publication Date
GB462664A true GB462664A (en) 1937-03-08

Family

ID=10219934

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2495635A Expired GB462664A (en) 1935-09-07 1935-09-07 Manufacture of 2:6-dimethylnaphthalene-8-sulphonic acid

Country Status (1)

Country Link
GB (1) GB462664A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102675914A (en) * 2011-03-10 2012-09-19 天津聚贤投资有限公司 Method for replacing 2-nitroethylbenzene as solvent

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102675914A (en) * 2011-03-10 2012-09-19 天津聚贤投资有限公司 Method for replacing 2-nitroethylbenzene as solvent

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