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Method for reducing 4-methylimidazole in caramel pigment

A technology of tetramethylimidazole and caramel coloring, applied in chemical instruments and methods, azo dyes, organic dyes, etc., can solve the complex production process of caramel coloring, cumbersome physical removal method operation, difficult to control reaction conditions, etc. problems, to achieve the effect of high production efficiency, optimized production process, and accelerated reaction speed

Inactive Publication Date: 2018-09-21
肇庆焕发生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production process of caramel pigment is relatively complicated, the reaction conditions are difficult to control, and the physical removal method is relatively cumbersome, which leads to increased production costs and is difficult to popularize.
At present, the content of -methylimidazole in caramel pigment produced by traditional ammonia method and ammonium sulfite method almost exceeds the national standard (GB8817-2001 stipulates that the content of 4-methylimidazole in ammonium (ammonia) method caramel pigment cannot exceed 200ppm )

Method used

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  • Method for reducing 4-methylimidazole in caramel pigment

Examples

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Comparison scheme
Effect test

Embodiment 1

[0022] A method for reducing tetramethylimidazole in caramel pigment, the specific steps are as follows:

[0023] (1) Hydrolysis: Weigh wheat B-starch, place it in a reactor, add hydrochloric acid aqueous solution and sodium chloride, mix well, put it into a microwave reactor and radiate it for 6 minutes, take it out, cool it, add sodium hydroxide to neutralize, Filter, get filtrate, obtain wheat B-starch hydrolyzate, for subsequent use;

[0024] (2) Take wheat B-starch hydrolyzate, add deionized water, ammonium carbonate and glycine to fully mix, place the autoclave, airtight, heat up, the reaction temperature is 110 degrees, the reaction time is 50 minutes, and the reaction product is obtained. , through freeze-drying to obtain caramel coloring.

[0025] Wherein the caramel pigment is made up of the following raw materials in weight ratio: 4% glycine, 20% wheat B-starch, 1% ammonium carbonate, 0.1% hydrochloric acid aqueous solution, 10% sodium chloride, 8% sodium hydroxide...

Embodiment 2

[0027] A method for reducing tetramethylimidazole in caramel pigment, the specific steps are as follows:

[0028] (1) Hydrolysis: Weigh wheat B-starch, place it in a reactor, add hydrochloric acid aqueous solution and sodium chloride, mix well, put it into a microwave reactor and radiate it for 6 minutes, take it out, cool it, add sodium hydroxide to neutralize, Filter, get filtrate, obtain wheat B-starch hydrolyzate, for subsequent use;

[0029] (2) Take wheat B-starch hydrolyzate, add deionized water, ammonium carbonate and glycine after fully mixing, place high-pressure reactor, airtight, heat up, reaction temperature 130 degrees, reaction time 70 minutes, drop to room temperature, obtain reaction product , through freeze-drying to obtain caramel coloring.

[0030] Wherein the caramel coloring is made up of the raw material of following weight ratio: 5% glycine, 30% wheat B-starch, 3% ammonium carbonate, 0.3% hydrochloric acid aqueous solution, 13% sodium chloride, 9% sodi...

Embodiment 3

[0032] A method for reducing tetramethylimidazole in caramel pigment, the specific steps are as follows:

[0033] (1) Hydrolysis: Weigh wheat B-starch, place it in a reactor, add hydrochloric acid aqueous solution and sodium chloride, mix well, put it into a microwave reactor and radiate it for 6 minutes, take it out, cool it, add sodium hydroxide to neutralize, Filter, get filtrate, obtain wheat B-starch hydrolyzate, for subsequent use;

[0034] (2) Take the wheat B-starch hydrolyzate, add deionized water, ammonium carbonate and glycine and mix well, place the autoclave, airtight, heat up, the reaction temperature is 150 degrees, the reaction time is 90 minutes, and the reaction product is obtained. , through freeze-drying to obtain caramel coloring.

[0035] Wherein said caramel pigment is made up of the following raw materials of weight ratio: 5% glycine, 48% wheat B-starch, 6% ammonium carbonate, 0.5% hydrochloric acid aqueous solution, 10% sodium chloride, 10% sodium hyd...

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Abstract

The invention discloses a method for reducing 4-methylimidazole in caramel pigment, and belongs to the technical field of edible colorants. The caramel pigment is prepared from, by weight, 20%-60% ofwheat B-flour, 1%-8% of ammonium carbonate, 4%-7% of glycine, 0.1%-0.6% of a hydrochloric acid water solution, 10%-18% of sodium chloride, 8%-10% of sodium hydroxide and 30%-40% of deionized water. Forming of 4-methylimidazole in a reaction system is controlled with the method of adding glycine. By optimizing the production technology, a caramel pigment product with the low 4-methylimidazole content, the high color rate and the high quality is obtained; process operation is easy, production efficiency is high, and the method is economical and practical and suitable for popularization.

Description

technical field [0001] The invention belongs to the technical field of edible colorants, in particular to a method for reducing tetramethylimidazole in caramel pigment. Background technique [0002] Caramel pigment, also known as caramel color, occupies an important position in the food coloring market and is widely used in condiment, food, beverage, pharmaceutical and other industries. It is currently the most widely used food additive in the food industry. Caramel coloring is a natural coloring made of high-quality sucrose, glucose or other starch sugars as the main raw materials and processed by special formula and technology. It has the characteristics of good water solubility, strong coloring power, stable properties, safety and non-toxicity, etc. It is currently the largest amount of food coloring, the most widely used, and the most countries use it as a food coloring agent. [0003] In the 1960s, caramel coloring was banned by some countries because it contained 4-me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C09B67/54A23L5/43
CPCC09B61/00A23L5/43C09B67/0096
Inventor 丘春洪廖玺烈董英炎
Owner 肇庆焕发生物科技有限公司
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