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Preparation method of caramel pigment without 4-methylimidazole

A technology of methylimidazole caramel and caramel pigment, applied in chemical instruments and methods, azo dyes, organic dyes, etc., can solve the problems of inability to promote production on a large scale, achieve bright color and improve salt tolerance

Active Publication Date: 2015-08-26
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using white granulated sugar as raw material, the method of producing caramel pigment is only introduced in the literature. Hangzhou Food Factory adopts the technology of Shaanxi University of Science and Technology and adopts manual cooking method for production. The product quality is good, but it cannot be promoted on a large scale.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] While stirring (20r / min), add 100kg of white granulated sugar to the reaction kettle with cooling and drainage device, turn on the heating device to heat, when the temperature of the reaction kettle rises to 190°C, the sucrose starts to melt, and all melt within 8 minutes. Turn on the condensed water and collect 5kg of cooling water. After draining, change the condenser pipe to a cooling return pipe and keep it at 150°C for 2 hours. Due to the production of CO in the caramelization reaction 2 . Therefore, at this time, the foaming is relatively severe. By changing the stirring speed (40r / min), the purpose of eliminating the foam is achieved. Before the end of the caramelization reaction, slowly add 5% Na in the reaction system 2 CO 3 Use 50kg of aqueous solution to adjust the pH to 4.5-6.5, and keep stirring to prevent the pot from overflowing. The salt (acid) resistant, red pigment index of 9.5 and caramel pigment without 4-methylimidazole can be obtained.

[004...

Embodiment 2

[0042]While stirring (30r / min), add 100kg of marshmallow to the reaction kettle with condensation drainage device, turn on the heating device to heat, when the temperature of the reaction kettle rises to 190°C, the sugar starts to melt, and all melt within 9 minutes. Turn on the condensed water and collect 6kg of cooling water. After draining, change the condensation pipe to a cooling return pipe and keep it at 160°C for 1.5h. Due to the production of CO in the caramelization reaction 2 . Therefore, at this time, the foaming is relatively severe. By changing the stirring speed (60 / rmin), the purpose of eliminating the foam is achieved. Before the end of the caramelization reaction, slowly add 9% Na to the reaction system 2 CO 3 Use 50kg of aqueous solution to adjust the pH to 4.5-6.5, and keep stirring to prevent the pot from overflowing. The salt (acid) resistant, red pigment index of 9.2 and caramel pigment without 4-methylimidazole can be obtained.

[0043] Prepare th...

Embodiment 3

[0045] While stirring (20r / min), add 100kg rock sugar to the reaction kettle with condensation drainage device, turn on the heating device to heat, when the temperature of the reaction kettle rises to 190°C, the sugar starts to melt, and all melt within 10 minutes. Turn on the condensed water and collect 6kg of cooling water. After draining, change the condenser pipe to a cooling return pipe and keep it at 170°C for 1 hour. Due to the production of CO in the caramelization reaction 2 . Therefore, at this time, the foaming is relatively severe. By changing the stirring speed (50r / min), the purpose of eliminating the foam is achieved. Before the end of the caramelization reaction, slowly add 10% Na to the reaction system 2 CO 3 Use 45kg of aqueous solution to adjust the pH to 4.5-6.5, and keep stirring to prevent the pot from overflowing. The salt (acid) resistant, red pigment index of 9.1 and caramel pigment without 4-methylimidazole can be obtained.

[0046] Prepare the ...

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PUM

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Abstract

The invention discloses a preparation method of a caramel pigment without 4-methylimidazole. The preparation method comprises the following steps of: 1) sugar-melting, to be specific, adding a sugar source to a reaction kettle with a condensing and draining device while mixing, turning on a heating device for heating, melting the sugar source after the temperature of the reaction kettle rises above the melting point of the sugar source; 2) draining, to be specific, turning on condensing water, collecting cooling water, and controlling the volume of the cooling water to 5%-8% of the volume of the sugar source; 3) caramelization reaction, to be specific, after draining is finished, changing a condenser pipe into a cooling water return pipe, and keeping at 150 DEG C to 170 DEG C for 1 h-2 h; 4) diluting (neutralizing), to be specific, before the caramelization reaction is finished, adding an alkaline solution to the reaction system slowly to adjust the pH value of the system to be close to the isoelectric point of the caramel pigment, and mixing slowly and continuously until complete reaction is finished; 5) obtaining the product, to be specific, obtaining liquid caramel pigment without 4-methylimidazole after the reaction. The preparation method of the caramel pigment without 4-methylimidazole is economical, practical, safe and high in quality, industrial production is realized, and quality of the caramel pigment is controlled.

Description

technical field [0001] The invention belongs to the field of food additives, in particular to a preparation method of 4-methylimidazole-free caramel pigment. Background technique [0002] Caramel color, also known as caramel color and caramel color, is a complex product formed by dehydration, decomposition and polymerization of sugar substances (such as maltose, white sugar, molasses, invert sugar, lactose, maltose syrup and starch hydrolyzate, etc.) at high temperature. Reddish-brown or dark-brown mixture, some of which are colloidal aggregates, are widely used semi-natural food coloring agents. [0003] Most of our country adopts the ammonia method to produce caramel pigment. During the caramelization process, it is easy to produce 4-methylimidazole. 4-Methylimidazole is a white to off-white crystalline powder, soluble in water and ethanol, corrosive, and is the ammonia method. A by-product of the production process of caramel coloring, it can cause tumors in animals and ...

Claims

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Application Information

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IPC IPC(8): C09B61/00
CPCC09B61/00
Inventor 李祥马倩鹤豆静茹王丽萍张彬师春兰
Owner SHAANXI UNIV OF SCI & TECH
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