Method for preparing rdish red pigment and radish phenyl-isosulfo cyanate

A technology of isothiocyanate and radish red, applied in the field of natural pigments, can solve the problems of affecting environmental protection, affecting product quality, long production cycle, etc., reducing the discharge of waste and waste water, being conducive to environmental protection and saving The effect of resources and energy

Inactive Publication Date: 2006-08-09
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that the raw materials are not comprehensively utilized; in the production process, enzymes need to be used for a long time to react, resulting in long production cycle, low production efficiency, high production cost, and environmental pollution caused by waste materials
The main disadvantage of this method is that it needs to carry out group protection and deprotection group procedures, and has strict fire prevention, explosion protection and other measures, so the equipment is complicated, the investment is high, and the production cost is high; a large amount of organic matter pollutes the environment during the production process , affecting environmental protection; and a variety of impurities are produced due to non-specific reactions, and it is not easy to separate and purify, which seriously affects product quality, etc.

Method used

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  • Method for preparing rdish red pigment and radish phenyl-isosulfo cyanate
  • Method for preparing rdish red pigment and radish phenyl-isosulfo cyanate
  • Method for preparing rdish red pigment and radish phenyl-isosulfo cyanate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The steps of a preparation method of radish red pigment and radish isothiocyanate are as follows:

[0049] (1) Preparation of radish red pigment solution

[0050] ① Preparation of crude extract

[0051] Add 100g of "Xinxinmei" radish to 1000mL of distilled water, grind it, heat it to 50°C, and keep it for 60min, then squeeze it with 8 layers of gauze until no juice is drained. Remove the radish residue, heat the filtrate to boiling and keep it for 10 minutes, then filter the filtrate with diatomaceous earth, and finally cool the filtrate to room temperature to prepare the crude extract of radish red pigment;

[0052] ②Preparation of fine extract

[0053] After the crude extract of radish red pigment prepared in step ① is ultra-filtered through an ultra-concentrated membrane with a cut-off molecular weight of 6000Da, the retained filtrate has an isothiocyanate content of 0.035%, a radish red pigment content of 0.65%, The radish red pigment essence extract with ash con...

Embodiment 2

[0077] The steps of a preparation method of radish red pigment and radish isothiocyanate are as follows:

[0078] (1) Preparation of radish red pigment solution

[0079] ① Preparation of crude extract

[0080] Add 100g of "Xinxinmei" radish to 1200mL of distilled water, grind it, heat it to 60°C, and keep it for 80min, then press it with 8 layers of gauze until no juice is drained. Remove the radish residue, heat the filtrate to boiling and keep it for 15 minutes, then filter the filtrate with diatomaceous earth, and finally cool the filtrate to room temperature to prepare a crude extract of radish red pigment;

[0081] ②Preparation of fine extract

[0082] After the crude extract of radish red pigment prepared in step ① is ultra-filtered through an ultra-concentrated membrane with a cut-off molecular weight of 6000Da, the retained filtrate has an isothiocyanate content of 0.03%, a radish red pigment content of 0.45%, 0.26% ash content of radish red pigment essence extract;...

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Abstract

This invention relates to a method for preparing red coloring mater of radish and isosulfocyanide, which takes radishes of racted and separated, vacuum concentrated and frozen and dried to prepare red coloring matter of radishes, during the process, the collected extraction solution of isosulfocyanide is added with dilute alkali water to be counter-extracted and separated to exchange anions to prepare the isosulfocyanide and the renewed extraction agent and the anion exchange resin can be used again.

Description

1. Technical field [0001] The invention belongs to the technical field of natural pigments in food additives, in particular to a preparation method of natural plant red pigments and isothiocyanates. 2. Background technology [0002] Radish red pigment is a natural plant pigment, which has the characteristics of non-toxic, biodegradable, sufficient source of raw materials and low price. It can be widely used in the coloring of beverages, pastries, candies, jellies and other foods. However, the isothiocyanate present in the red radish pigment has a strong taste and causes peculiar smell in the red radish pigment, thus affecting the quality of food. [0003] Isothiocyanates are hydrolyzed products of sinigrin, a component of cruciferous plants. In recent years, studies have found that this substance has a strong anti-cancer effect, and has obvious effects against lung cancer, breast cancer, skin cancer, etc. It is a potential functional food additive; it also has anti-bacteria...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C07C331/16
Inventor 周小华王娟左瑞雅
Owner CHONGQING UNIV
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