GB647997A - Improvements in the manufacture of 2:3 hydroxynaphthoic acid - Google Patents

Improvements in the manufacture of 2:3 hydroxynaphthoic acid

Info

Publication number
GB647997A
GB647997A GB77349A GB77349A GB647997A GB 647997 A GB647997 A GB 647997A GB 77349 A GB77349 A GB 77349A GB 77349 A GB77349 A GB 77349A GB 647997 A GB647997 A GB 647997A
Authority
GB
United Kingdom
Prior art keywords
indifferent
hydroxynaphthoate
chemically
sodium
prepared
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
GB77349A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB77349A priority Critical patent/GB647997A/en
Publication of GB647997A publication Critical patent/GB647997A/en
Expired legal-status Critical Current

Links

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
    • C07C51/416—Henkel reaction and related reactions, i.e. rearrangement of carboxylate salt groups linked to six-membered aromatic rings, in the absence or in the presence of CO or CO2, (e.g. preparation of terepholates from benzoates); no additional classification for the subsequent hydrolysis of the salt groups has to be given

Landscapes

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

Abstract

Di-sodium 2 : 3-hydroxynaphthoate is prepared by heating di-sodium 2 : 1-hydroxynaphthoate in the substantial absence of materials containing free hydroxy groups and in a chemically-indifferent atmosphere between 220 DEG and 360 DEG C. The process is preferably carried out in a chemically-indifferent liquid at a pressure such that the boiling point is within the above temperature range. Suitable liquids are medicinal paraffin, tetrahydronaphthalene and melted paraffin wax. When the reaction is completed the product is extracted with water (the indifferent liquid used being first distilled off if desired), the solution filtered if desired, and the free acid precipitated with hydrochloric acid. The starting material is preferably prepared by the method of Specification 647,981. Specification 9612/89, [Class 2], also is referred to.
GB77349A 1948-04-05 1948-04-05 Improvements in the manufacture of 2:3 hydroxynaphthoic acid Expired GB647997A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB77349A GB647997A (en) 1948-04-05 1948-04-05 Improvements in the manufacture of 2:3 hydroxynaphthoic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB77349A GB647997A (en) 1948-04-05 1948-04-05 Improvements in the manufacture of 2:3 hydroxynaphthoic acid

Publications (1)

Publication Number Publication Date
GB647997A true GB647997A (en) 1950-12-28

Family

ID=9710275

Family Applications (1)

Application Number Title Priority Date Filing Date
GB77349A Expired GB647997A (en) 1948-04-05 1948-04-05 Improvements in the manufacture of 2:3 hydroxynaphthoic acid

Country Status (1)

Country Link
GB (1) GB647997A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE941429C (en) * 1954-08-08 1956-04-12 Hoechst Ag Process for the preparation of dialkali salts of 2-oxynaphthalene- (3) -carboxylic acid
US2808434A (en) * 1952-09-27 1957-10-01 Hoechst Ag Process of preparing 2-hydroxynaphthalene-3-carboxylic acid
WO1998049130A2 (en) * 1997-04-29 1998-11-05 The University Of New Mexico Hydroxynaphthoic acids and derivatives
US6124498A (en) * 1995-04-28 2000-09-26 University Of New Mexico Hydroxynaphthoic acids and derivatives

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2808434A (en) * 1952-09-27 1957-10-01 Hoechst Ag Process of preparing 2-hydroxynaphthalene-3-carboxylic acid
DE941429C (en) * 1954-08-08 1956-04-12 Hoechst Ag Process for the preparation of dialkali salts of 2-oxynaphthalene- (3) -carboxylic acid
US6124498A (en) * 1995-04-28 2000-09-26 University Of New Mexico Hydroxynaphthoic acids and derivatives
WO1998049130A2 (en) * 1997-04-29 1998-11-05 The University Of New Mexico Hydroxynaphthoic acids and derivatives
WO1998049130A3 (en) * 1997-04-29 1999-01-28 Univ New Mexico Hydroxynaphthoic acids and derivatives

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