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A method for preparing chestnut shell brown pigment by ultrafine pulverization and pulsed electric field

A technology of pulsed electric field and ultrafine pulverization, which is applied in chemical instruments and methods, azo dyes, organic dyes, etc., can solve the problems of chestnut shell pigment extraction, time-consuming grape pomace polyphenols, cumbersome operation process, etc. , to achieve the effect of saving extraction time and energy, short processing time and good water solubility

Active Publication Date: 2017-11-07
WUHAN YELLOW CRANE TOWER NEW MATERIAL TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent 201310141353.9 discloses a pulsed electric field-assisted countercurrent extraction of grape pomace polyphenols and a method, which solves the problems of long time-consuming extraction of grape pomace polyphenols, low extraction efficiency and cumbersome operation process in existing traditional methods
However, there is no relevant patent report on the application of this technology in the extraction of chestnut shell pigment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, a method for preparing chestnut shell brown pigment by ultrafine pulverization and alcohol extraction, is characterized in that the specific steps are as follows:

[0022] (1) After removing impurities, cleaning and drying the chestnut shell, use an ordinary pulverizer to carry out primary crushing, and pass through a 60-mesh sieve for subsequent use;

[0023] (2) put the coarse powder that step (1) obtains into ultrafine pulverization equipment and carry out wall-breaking treatment 2 times, control feed rate 1kg / h, pressure 0.8MPa, obtain chestnut shell ultrafine powder product;

[0024] (3) Add the superfine powder of chestnut shell into 30% ethanol aqueous solution according to the mass ratio of 1:8, after mixing evenly, put the feed liquid into the pulse electric field treatment chamber, and treat it for 25min under the condition of constant stirring; filter residue and ethanol aqueous solution After mixing evenly according to the material-to-liquid ra...

Embodiment 2

[0026] Embodiment 2, a method for preparing chestnut shell brown pigment by ultrafine pulverization and alcohol extraction, is characterized in that the specific steps are as follows:

[0027] (1) After removing impurities, cleaning and drying the chestnut shells, use an ordinary pulverizer to carry out primary crushing, and pass through an 80-mesh sieve for subsequent use;

[0028] (2) put the coarse powder that step (1) obtains into ultrafine pulverization equipment and carry out wall-breaking treatment 1 time, control feed rate 2.0kg / h, pressure 1.0MPa, obtain chestnut shell ultrafine powder product;

[0029] (3) Add the superfine powder of chestnut shell into 35% ethanol aqueous solution according to the mass ratio of 1:10, and after the dispersion is uniform, put the feed liquid into the pulse electric field treatment chamber, and treat it for 15 minutes under the condition of constant stirring; filter residue and ethanol aqueous solution After mixing evenly according to ...

Embodiment 3

[0031] Embodiment 3, a method for preparing chestnut shell brown pigment by ultrafine pulverization and alcohol extraction, is characterized in that the specific steps are as follows:

[0032] (1) After removing impurities, cleaning and drying the chestnut shells, use an ordinary pulverizer to carry out primary crushing, and pass through an 80-mesh sieve for subsequent use;

[0033](2) Throwing the coarse powder obtained in step (1) into low-temperature ultrafine pulverization equipment to carry out wall-breaking treatment once, controlling the feed rate to 1.0kg / h, and pressure 0.5MPa to obtain the chestnut shell ultrafine powder product;

[0034] (3) Add the superfine powder of chestnut shell into 40% ethanol aqueous solution according to the mass ratio of 1:15, and after the dispersion is uniform, put the feed liquid into the pulse electric field treatment chamber, and treat it for 20min under the condition of constant stirring; filter residue and ethanol aqueous solution A...

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Abstract

The invention provides a method of preparing chestnut shell brown pigment by ultra-micronization in cooperation with pulsed electric field, comprising the steps of (1), cleaning, washing and drying chestnut shells and then primarily crushing the chestnut shells; (2), adding coarse chestnut shell powder into an ultra-micronization apparatus for wall breaking to obtain chestnut shell superfine powder; (3), using ethanol solution as an extracting solvent to extract the chestnut shell superfine powder by the aid of a pulsed electric field treating device, filtering, and combining double extracts to obtain pigment extract; (4), concentrating the pigment extract under reduced pressure to 1 / 3 of the original size, and carrying out alcohol precipitation, solid-liquid separation, concentration and drying to obtain the chestnut shell brown pigment that is powdery. The ultra-micronization and pulsed electric field treating techniques are combined, no heating is required to provide quick and complete dissolution of the chestnut shell pigment, extracting time and energy can be greatly saved, and the method has the advantages of rich material sources, low extracting temperature, high product yield is high, short treatment time, good operational simplicity and the like; the obtained chestnut shell brown pigment has high color intensity, good water-solubility, stable quality, safety with no toxicity and is worthy of practical production and conversion and practical popularization and application.

Description

technical field [0001] The invention relates to the technical field of natural pigment preparation, in particular to a method for preparing chestnut shell brown pigment through ultrafine pulverization in conjunction with a pulsed electric field. Background technique [0002] With the report that caramel pigment contains 4-methylimidazole carcinogen, the safety of chemically synthesized pigments has been paid more and more attention, and its usage as food additives has been limited, and some of them have even been banned. In recent years, the search and development of natural plant pigment resources without toxic and side effects has been favored by people. The domestic natural pigment industry is developing rapidly. There are relevant literature reports on the development and application of gardenia yellow pigment, chestnut shell brown pigment, natural orange-red pigment, cocoa shell pigment, grape skin pigment, and safflower yellow pigment. For a long time, chestnut shells...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B61/00
CPCC09B61/00
Inventor 孙炜炜黄龙陈胜蹇顺华潘妮
Owner WUHAN YELLOW CRANE TOWER NEW MATERIAL TECH DEV
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