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A kind of wheat bran microcrystalline cellulose and its preparation method

A technology of microcrystalline cellulose and cellulose, applied in the field of utilization of agricultural and forestry biomass resources, can solve the problems of harsh extraction conditions, harsh reaction conditions, and low product yields, and achieve rich raw material sources, less harsh use conditions, and high extraction rates. high effect

Active Publication Date: 2017-04-12
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The physical methods mainly include coarse separation method (such as suspension method and air classification method) and membrane separation method. The purity of the product obtained by the former method is low, while the membrane separation method is mainly used for the purification and concentration of wheat bran fiber. The high cost, so the scope of application is limited; the chemical separation method is mainly to use sodium hydroxide for extraction, the greater the concentration of the alkali, the greater the loss of cellulose, and the lower the product yield; the pure enzymatic extraction of wheat Although the purity of bran fiber is high, the extraction conditions are relatively harsh; although the extraction rate of the alkali-enzyme method is higher than that of the pure enzyme method, there are still problems such as harsh reaction conditions and high alkali concentration, resulting in greater loss of cellulose

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  • A kind of wheat bran microcrystalline cellulose and its preparation method
  • A kind of wheat bran microcrystalline cellulose and its preparation method
  • A kind of wheat bran microcrystalline cellulose and its preparation method

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Embodiment 1

[0079] figure 1 For the process flow diagram of the preparation method of wheat bran microcrystalline cellulose of the present invention, refer to figure 1 , the present embodiment provides a preparation method of wheat bran microcrystalline cellulose, comprising the following steps:

[0080] (1) Pretreatment: Grind the wheat bran with a pulverizer, then pass through a 100-mesh sieve to obtain wheat bran residue, add distilled water to the wheat bran residue at a temperature of 70°C according to the ratio of solid to liquid at 1:10g / mL Cooking pretreatment for 20 minutes, cooling to room temperature, filtering the cooked wheat bran residue to obtain the first filter residue;

[0081] (2) Alkali treatment: the first filter residue is added to the NaOH solution with a mass fraction of 1% according to the solid-liquid ratio of 1:10g / mL, and the leaching temperature is 80°C for 12h, and then the leaching After the first filter residue is washed to neutrality, it is filtered to o...

Embodiment 2

[0090] A preparation method of wheat bran microcrystalline cellulose, comprising the following steps:

[0091] (1) Pretreatment: Grind the wheat bran with a pulverizer, and pass through a 100-mesh sieve to obtain the wheat bran residue. Add distilled water to the wheat bran residue at a temperature of 60°C according to the solid-liquid ratio of 1:15g / mL. Cooking pretreatment for 15 minutes, cooling to room temperature, filtering the cooked wheat bran residue to obtain the first filter residue;

[0092] (2) Alkali treatment: the first filter residue is added to a NaOH solution with a mass fraction of 3% according to a material-to-liquid ratio of 1:15g / mL, and the leaching temperature is 40°C for 48 hours, and then the leaching After the first filter residue is washed to neutrality, it is filtered to obtain the second filter residue;

[0093] (3) Acid treatment: add distilled water to the second filter residue according to the solid-liquid ratio of 1:3g / mL, and adjust the pH to...

Embodiment 3

[0099] A preparation method of wheat bran microcrystalline cellulose, comprising the following steps:

[0100] (1) Pretreatment: Grind the wheat bran with a pulverizer, and pass through a 100-mesh sieve to obtain the wheat bran residue. Add distilled water to the wheat bran residue at a temperature of 80°C according to the ratio of solid to liquid at 1:20g / mL. Cooking pretreatment for 10 minutes, cooling to room temperature, filtering the cooked wheat bran residue to obtain the first filter residue;

[0101](2) Alkali treatment: the first filter residue is added to the NaOH solution with a mass fraction of 5% according to the ratio of material to liquid of 1:20g / mL, and the leaching temperature is 60°C for 36h, and then after leaching The first filter residue is washed to neutrality, and filtered to obtain the second filter residue;

[0102] (3) Acid treatment: Add distilled water to the second filter residue according to the solid-liquid ratio of 1:4g / mL, adjust the pH to 2 ...

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Abstract

The present invention provides a wheat bran microcrystalline cellulose preparation method, which comprises pretreatment, alkali treatment, acid treatment, degreasing with ethanol, bleaching, acid hydrolysis, and drying to prepare the wheat bran microcrystalline cellulose. According to the present invention, the preparation method has characteristics of simple process, environmental protection, low reagent cost, mild reagent use condition, mild extraction condition, and high extraction rate; the purity of the wheat bran microcrystalline cellulose prepared according to the preparation method is high, various index performances are excellent, and the prepared wheat bran microcrystalline cellulose can be widely applied in the fields of medicine, food, daily chemical industry and the like; and the inexpensive wheat bran is adopted as the raw material, such that the added value of the deep processing of the wheat bran can be increased, the production cost of the microcrystalline cellulose is reduced, and the edible fiber production raw material source is enriched. The present invention further provides the wheat bran microcrystalline cellulose.

Description

technical field [0001] The invention relates to the technical field of utilization of agricultural and forestry biomass resources, in particular to a wheat bran microcrystalline cellulose and a preparation method thereof. Background technique [0002] Microcrystalline cellulose (MCC for short) is a free-flowing extremely fine particle formed by dilute acid hydrolysis of natural cellulose to the limiting degree of polymerization (LODP). Compared with cellulose, it has a lower degree of polymerization and a larger Due to special properties such as specific surface area, microcrystalline cellulose is more widely used in medicine, food, cosmetics and light chemical industries. [0003] Wheat bran, that is, the seed coat that is sieved after grinding wheat flour, is mainly composed of fiber, aleurone, some minerals and vitamins. At present, the research on wheat bran is mostly focused on the extraction of wheat bran fiber, while the research on making it into wheat bran microcry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C1/00D21C9/00D21C9/08D21C9/12D21C5/00
CPCD21C1/00D21C5/00D21C9/00D21C9/08D21C9/14
Inventor 王喆叶忱潘浩波王怀雨陈丽丽吕敏敏
Owner SHENZHEN INST OF ADVANCED TECH
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