GB919428A - Process for decolorising and/or stabilizing against discoloration aromatic compounds - Google Patents

Process for decolorising and/or stabilizing against discoloration aromatic compounds

Info

Publication number
GB919428A
GB919428A GB3340061A GB3340061A GB919428A GB 919428 A GB919428 A GB 919428A GB 3340061 A GB3340061 A GB 3340061A GB 3340061 A GB3340061 A GB 3340061A GB 919428 A GB919428 A GB 919428A
Authority
GB
United Kingdom
Prior art keywords
tert
butyl
sec
butylaniline
octylphenol
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
GB3340061A
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of GB919428A publication Critical patent/GB919428A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
    • C07C37/68—Purification; separation; Use of additives, e.g. for stabilisation
    • C07C37/86—Purification; separation; Use of additives, e.g. for stabilisation by treatment giving rise to a chemical modification

Landscapes

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

Abstract

Phenols and aromatic amines are stabilized and/or decolorised by contact with a basic aqueous solution containing dithionite ions. Specified compounds are:- b -naphthol, 1phenanthrol, resorcinol, pyrogallol, phenol, o-, m- and p-cresols, the xylenols, o-ethylphenol, p-octylphenol, 2:4:6 - tritert-butylphenol, durenol, 2-methyl-6-isopropylphenol, 2-ethyl-6-tert-butylphenol, 2-hexyl-6-tert-octylphenol, 2-propyl-6-cyclohexylphenol and 2:6di-isopropyl, -sec-butyl, -sec-amyl, -sec-octyl, -tert-butyl, -tert-amyl, -tert-heptyl and -tertoctylphenols; biphenols such as 3,31,5,51-tetratert-butyl biphenol and bis(3,5-di-tert-butyl-4hydroxyl)methane; b -naphthylamine, phenylenediamine, durenediamine, aniline, methyl and dimethyl anilines, 2:6 - diethylaniline, o - tert - butylaniline, 2:4 - ditert-butylaniline, monoaminodurine and p-octylaniline. Zn, Ca, Na and K dithionites are mentioned; basic compounds which may be used include NaOH, KOH, Ca(OH)2, K2CO3 and NaHCO3. The treatment may be combined with an alkylation process in which a phenol or aromatic amine is alkylated, preferably with an olefine containing 2-8 carbon atoms, in the presence of an acidic alkylation catalyst and the product is treated with a solution containing dithionate ions before it is isolated. Specifications 756,538, 798,438 and 843,745 are referred to.
GB3340061A 1960-09-19 1961-09-18 Process for decolorising and/or stabilizing against discoloration aromatic compounds Expired GB919428A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5665860A 1960-09-19 1960-09-19

Publications (1)

Publication Number Publication Date
GB919428A true GB919428A (en) 1963-02-27

Family

ID=22005840

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3340061A Expired GB919428A (en) 1960-09-19 1961-09-18 Process for decolorising and/or stabilizing against discoloration aromatic compounds

Country Status (1)

Country Link
GB (1) GB919428A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4356330A (en) * 1981-07-20 1982-10-26 Texaco Inc. Method of decolorizing mixtures of T-butyl alkylphenols with N-(2-hydroxyethyl)oxazolidine
WO1996004236A1 (en) * 1994-08-02 1996-02-15 Hoechst Aktiengesellschaft Method for preparing polyhydroxy fatty acid amide solutions of good color quality and their use
CN111792980A (en) * 2020-06-18 2020-10-20 湖南国发精细化工科技有限公司 O-sec-butylphenol containing antitarnish agent

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4356330A (en) * 1981-07-20 1982-10-26 Texaco Inc. Method of decolorizing mixtures of T-butyl alkylphenols with N-(2-hydroxyethyl)oxazolidine
WO1996004236A1 (en) * 1994-08-02 1996-02-15 Hoechst Aktiengesellschaft Method for preparing polyhydroxy fatty acid amide solutions of good color quality and their use
US5571934A (en) * 1994-08-02 1996-11-05 Hoechst Ag Process for preparing solutions of polyhydroxy-fatty acid amides having good color quality, and their use
AU689638B2 (en) * 1994-08-02 1998-04-02 Clariant Gmbh Method for preparing polyhydroxy fatty acid amide solutions of good color quality and their use
CN111792980A (en) * 2020-06-18 2020-10-20 湖南国发精细化工科技有限公司 O-sec-butylphenol containing antitarnish agent

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