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Method of using subcritical water to prepare caramel color and application thereof

A technology of subcritical water and caramel color, which is applied in the field of subcritical water to prepare caramel color, can solve the problems of low production efficiency and difficulty in removal, achieve small footprint, low equipment requirements, and save the process of replacing the concentration container Effect

Active Publication Date: 2018-08-17
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its production efficiency is low, and the acid or alkali introduced is not easy to remove, while the preparation of caramel color by subcritical water method does not need to add any catalyst or acid and alkali other than raw sugar, which is pollution-free and can achieve relatively high reaction conditions and high production efficiency. , is a green and environmentally friendly technology, and there is no research report on the preparation of caramel color by subcritical water.

Method used

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  • Method of using subcritical water to prepare caramel color and application thereof

Examples

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Effect test

Embodiment 1

[0035] A method for preparing caramel color with subcritical water, according to the following steps:

[0036] (1) Crush the sucrose raw material to 60 mesh, weigh 1.0Kg of sucrose powder, and wrap it in 300 mesh nylon cloth for use;

[0037] (2) Put the wrapped raw materials into the subcritical reactor, add 3L of deionized water according to the solid-to-liquid ratio of 1:3Kg / L, the heating time is 80min, the reaction temperature is 190℃, the reaction pressure is 3MPa, and the reaction time is 30min , Caramelization reaction;

[0038] (3) After the reaction is over, open the gas release valve, adjust the tank to normal pressure, and filter the obtained mixture with an 80-mesh screen, and then filter it through a 300-mesh screen for a second time to remove impurities to obtain 2.9Kg of filtrate;

[0039] (4) Adjust the pH of the filtrate to 5.8;

[0040] (5) Concentrate the pH-adjusted solution to 0.31 times the mass to obtain a caramel color of 0.9Kg. Measure the absorbance value at ...

Embodiment 2

[0042] A method for preparing caramel color with subcritical water, according to the following steps:

[0043] (1) Crush the wheat flour to 80 mesh, weigh 1.0 Kg of the powder, and wrap it in 300 mesh special nylon cloth for use;

[0044] (2) Put the wrapped raw materials into the subcritical reactor, add 2.5L of deionized water according to the solid-liquid ratio of 1:2.5Kg / L, the heating time is 90min, the reaction temperature is 200℃, the reaction pressure is 3.5MPa, and the reaction The time is 30min to carry out the caramelization reaction;

[0045] (3) After the reaction is over, open the gas release valve, adjust the tank to normal pressure, and filter the obtained mixture with an 80-mesh screen, and then filter it through a 300-mesh screen for a second time to remove impurities to obtain 2.3Kg of filtrate;

[0046] (4) Adjust the pH of the filtrate to 6.0;

[0047] (5) Concentrate the pH-adjusted solution to 0.43 times the mass to obtain 1.0Kg of caramel color. Measure the abso...

Embodiment 3

[0049] A method for preparing caramel color with subcritical water, according to the following steps:

[0050] (1) Crush the raw material of pumpkin powder to 80 mesh, weigh 1.0 kg of pumpkin powder containing pumpkin polysaccharide, and wrap it in 300 mesh nylon cloth for use;

[0051] (2) Put the wrapped raw materials into the subcritical reactor, add 3L of deionized water according to the solid-liquid ratio of 1:3Kg / L, the heating time is 60min, the reaction temperature is 170℃, the reaction pressure is 3.0MPa, and the reaction time is 30min, carry out caramelization reaction;

[0052] (3) After the reaction is over, open the gas release valve, adjust the tank to normal pressure, and filter the obtained mixture with an 80-mesh screen, and then filter it through a 300-mesh screen for a second time to remove impurities to obtain 2.6Kg of filtrate;

[0053] (4) Adjust the pH of the filtrate to 6.0;

[0054] (5) Concentrate the pH-adjusted solution to 0.38 times the mass to obtain a car...

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Abstract

The invention discloses a method of using subcritical water to prepare caramel color and application thereof. The method comprises the steps (1) crushing sugar material into raw powder, and wrapping the powder in nylon cloth; (2) adding the raw powder in nylon cloth, into a subcritical reactor, with deionized water serving as a solvent, and heating to reaction temperature performing caramelization, wherein the reaction temperature is 150-210 DEG C; (3) after caramelization ends, adjusting to normal pressure, and filtering the mixture to remove impurities; (4) adjusting pH of filtrate in the step (3) to 5.0-6.0 shop; (5) concentrating the solution of step (4) to 0.2-0.6 times by mass so that caramel is obtained. The method is free of pollution and environmentally friendly, has a simple process flow and low equipment requirement, and is easy to use to implement industrial application and production.

Description

Technical field [0001] The invention relates to the technical field of food additives, in particular to a method for preparing caramel color from subcritical water and its application. Background technique [0002] Subcritical Water (SW), also known as super hot water or high temperature water, refers to a kind of high temperature and high pressure that is kept in a liquid state under proper pressure, the temperature is above the boiling point of water 100℃, and the critical temperature is below 374℃ water. The nature of subcritical water is very different from that of water under normal temperature and pressure. On the one hand, the hydrogen bond in water is opened or weakened under high temperature and pressure, which reduces the polarity of water and enhances the ability to dissolve organic matter. It is similar to organic solvents that can extract organics. Substances, on the other hand, as the temperature approaches the near point, the acid-base catalytic ability of water i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00A23L5/43
CPCA23L5/43C09B61/00
Inventor 李全宏常智尧于国泳程晓惠
Owner CHINA AGRI UNIV
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