A kind of wheat bran microcrystalline cellulose and its preparation method

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...

Examples

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 ...

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...

Examples

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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