GB1270656A - Food colours - Google Patents

Food colours

Info

Publication number
GB1270656A
GB1270656A GB09671/68A GB1967168A GB1270656A GB 1270656 A GB1270656 A GB 1270656A GB 09671/68 A GB09671/68 A GB 09671/68A GB 1967168 A GB1967168 A GB 1967168A GB 1270656 A GB1270656 A GB 1270656A
Authority
GB
United Kingdom
Prior art keywords
dye
acid
mixture
acetamido
naphthol
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
GB09671/68A
Inventor
Frederick Peter Jenkins
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.)
Unilever PLC
Original Assignee
Unilever PLC
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 Unilever PLC filed Critical Unilever PLC
Priority to GB09671/68A priority Critical patent/GB1270656A/en
Publication of GB1270656A publication Critical patent/GB1270656A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
    • A23L5/40—Colouring or decolouring of foods
    • A23L5/42—Addition of dyes or pigments, e.g. in combination with optical brighteners
    • A23L5/47—Addition of dyes or pigments, e.g. in combination with optical brighteners using synthetic organic dyes or pigments not covered by groups A23L5/43 - A23L5/46

Abstract

1,270,656. Food colours. UNILEVER Ltd. 24 April, 1969 [25 April, 1968], No. 19671/68. Heading A2B. [Also in Division C4] A food (e.g. sausage, carbonated drinks, icecream, jam) is coloured with 8-acetamido-2- (azo-benzene-4-sulphonic acid)-1-naphthol-3, 6- disulphonic acid or a salt (e.g. Na) thereof. The dye may be prepared by reacting sulphanilic acid, sodium nitrite and hydrochloric acid in the presence of sodium carbonate and water, reacting the resultant diazonium salt with 8- acetamido-1-naphthol-3, 6-disulphonic acid in the presence of sodium carbonate and water, adding ammonia to the reaction mixture, acidifying with acetic acid and heating the mixture, precipitating the dye with salt solution and purifying the dye with the use of more salt solution. Alternatively, the dye may be prepared by reacting the diazonium salt prepared as above with 8-acetamido-1-naphthol-3, 6-disulphonic acid in the presence of sodium hydroxide, neutralising the mixture with hydrochloric acid, evaporating the mixture to give the dye which is purified by recrystallising in ethanol.
GB09671/68A 1968-04-25 1968-04-25 Food colours Expired GB1270656A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB09671/68A GB1270656A (en) 1968-04-25 1968-04-25 Food colours

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB09671/68A GB1270656A (en) 1968-04-25 1968-04-25 Food colours

Publications (1)

Publication Number Publication Date
GB1270656A true GB1270656A (en) 1972-04-12

Family

ID=10133259

Family Applications (1)

Application Number Title Priority Date Filing Date
GB09671/68A Expired GB1270656A (en) 1968-04-25 1968-04-25 Food colours

Country Status (1)

Country Link
GB (1) GB1270656A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3873739A (en) * 1972-04-27 1975-03-25 Lever Brothers Ltd Foods containing red dye
GB2131825A (en) * 1982-10-27 1984-06-27 Mitsubishi Chem Ind Monoazo compounds

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3873739A (en) * 1972-04-27 1975-03-25 Lever Brothers Ltd Foods containing red dye
GB2131825A (en) * 1982-10-27 1984-06-27 Mitsubishi Chem Ind Monoazo compounds

Similar Documents

Publication Publication Date Title
GB275245A (en) Manufacture of stable diazo-salt preparations
GB1182328A (en) Production of Guanosine-5'-Phosphate
GB1270656A (en) Food colours
GB949293A (en) Process for the preparation of d-fructose
GB1444241A (en) Preparation of freshwater from sea water
GB1363834A (en) Sodium aluminium borate and preparation thereof
GB1198829A (en) Process for Preparing Pyrryl-(2)-Acetic Acid Esters
GB1349062A (en) Process for the preparation of leuco crystal violet lactone
GB1223663A (en) Pyrazole compounds and process for preparing the same
GB975940A (en) Improvements in or relating to the production of colour photographic images
GB1196596A (en) Preparation of a hydroxysebacic acid
GB555089A (en) A method of and means for the fining of alcoholic beverages
MX3003E (en) PROCEDURE FOR THE MANUFACTURE OF A COLORED POWDERED FOOD COMPOSITION
GB1424785A (en) Isomerised hop extracts
US3285906A (en) Monoazo pyrazole dyes
GB1182513A (en) Guanosine Derivatives and a process for preparing the same
JPS5692245A (en) Production of 2-hydroxynaphthalene-3-carboxylic acid
GB1127721A (en) Improvements relating to nitro acridone dyestuffs and their use
GB1246425A (en) Preparation of hop extract
Walker CCXLIX.—A new synthesis of arylazoaldoximes
GB1148552A (en) Azo dyestuffs containing a nucleus of benzothiophenedioxide
GB888682A (en) Improvements in or relating to methods of inhibiting corrosion of ferrous metal
GB1451528A (en) Process for the preparation of 4-bromonaphthalic acid anhydride
GB1490139A (en) Water-soluble monoazo dyestuffs
JPS5599198A (en) Determination of sero-enzyme by p-nitroanilide substrate