CN111349669A - Production process of maltodextrin - Google Patents

Abstract

The invention discloses a production process of maltodextrin, which comprises the following process steps of taking a certain amount of corn starch, drying, weighing, adding distilled water, stirring and mixing, adjusting the pH value of the mixed corn starch slurry to 6-7, adding CaCl2 into the pH-adjusted feed liquid, uniformly stirring, adding α -amylase into the mixed liquid for hydrolysis, heating to inactivate enzyme, adding sodium hydroxide solution into the inactivated hydrolysate to adjust the pH value to be neutral, adding active carbon for decolorization, filtering the decolorized hydrolysate by a plate-and-frame filter to remove impurities, and concentrating and spray-drying to obtain a finished product.

Description

Production process of maltodextrin

Technical Field

The invention relates to the technical field of biochemical engineering, in particular to a production process of maltodextrin.

Background

Maltodextrins are also known as water soluble dextrins or enzymatic dextrins. It is made up by using various starches as raw material and making them pass through the processes of enzyme method, low-level control of hydrolytic conversion, purification and drying. The raw materials are corn containing starch, rice and the like, and can also be refined starch, such as corn starch, wheat starch, cassava starch and the like. Maltodextrin is a basic industrial raw material which is started in the 80 th century, and is widely applied to the industries of food, beverage, textile, paper-making feed and the like internationally. The production of maltodextrin mainly comprises an acid method and an enzyme method, wherein the acid method process is a random conversion mechanism and can generate hydrolysis products with different hydrolysis degrees, so that a producer cannot control the composition distribution of the product, and the maltodextrin prepared by the acid method has strong coagulation tendency and generates mist-shaped precipitate, so that the solution is opaque, and the enzyme method is used for preparing the maltodextrin.

The existing enzymolysis method of starch has the defects of low reaction efficiency, low utilization rate of protease, complicated steps and the like, so that the problems of long reaction time, high enzyme consumption, low product activity and the like are caused. Therefore, those skilled in the art are devoted to develop a process for producing maltodextrin which uses corn starch as a raw material, has a simple process and a high product quality.

Disclosure of Invention

The invention aims to solve the technical problem of providing a production process of maltodextrin.

The technical scheme adopted by the invention for solving the technical problems is that the production process of the maltodextrin comprises the following preparation steps:

(1) taking a certain amount of corn starch, drying, weighing, adding distilled water according to the weight ratio of 1: 3-1: 6, and stirring and mixing for 10-15 min;

(2) adding NaOH solution with certain concentration into the corn starch slurry mixed in the step (1) to adjust the pH value to 6-7;

(3) adding CaCl with the specific gravity of 0.5-1% into the feed liquid with the pH adjusted in the step (2)₂Uniformly stirring the solution;

(4) adding medium-temperature α -amylase into the mixed solution in the step (3), carrying out heat preservation hydrolysis for 30-40min at the temperature of 80-90 ℃, heating to 100 ℃, and keeping for 20min for enzyme deactivation;

(5) and (4) adding a sodium hydroxide solution into the hydrolysate after enzyme deactivation in the step (4) to adjust the pH value to be neutral, and adding 1% by weight of activated carbon for decolorization.

(6) Filtering the hydrolysate decolorized in the step (5) by a plate and frame filter to remove impurities.

(7) And (4) concentrating the hydrolysate subjected to impurity removal in the step (6), and performing spray drying to obtain a finished product.

In a further technical scheme, the concentration of NaOH added in the step (2) and the step (5) is 0.1-0.2%.

Compared with the prior art, the invention has the following beneficial effects:

the invention adopts a one-step method of intermediate temperature α -amylase enzymolysis reaction, has simple preparation process, lower preparation cost and higher quality of maltodextrin product, and is suitable for industrial production.

Detailed Description

For a better understanding of the present invention, reference is made to the following examples. It is to be understood that these examples are for further illustration of the invention and are not intended to limit the scope of the invention. In addition, it should be understood that the invention is not limited to the above-described embodiments, but is capable of various modifications and changes within the scope of the invention.

Example 1

Taking a certain amount of corn starch, drying, weighing, adding distilled water according to the weight ratio of 1: 5, and stirring and mixing for 15 min; adding 0.1% NaOH solution into the corn starch slurry to adjust the pH value to 6.0; adding CaCl with the specific gravity of 1% into the pH-adjusted feed liquid₂Adding α -amylase at medium temperature into the mixed solution, hydrolyzing at 85 deg.C for 35min, heating to 100 deg.C, maintaining for 20min, adding 0.2% sodium hydroxide solution into the hydrolysate to adjust pH to neutral, adding 1% active carbon to decolorize, filtering with plate-and-frame filter to remove impurities, concentrating, and spray drying to obtain the final product.

Example 2

Taking a certain amount of corn starch, drying, weighing, adding distilled water according to the weight ratio of 1: 4, and stirring and mixing for 12 min; adding 0.2% NaOH solution into the corn starch slurry to adjust the pH value to 6.5; adding CaCl with a specific gravity of 0.75 into the pH-adjusted feed liquid₂Mixing the above solutions, adding α -amylase at medium temperature, hydrolyzing at 80 deg.C for 40min, heating to 100 deg.C, maintaining for 20min, adjusting pH to neutral, adding sodium hydroxide solution with concentration of 0.15%, and adding heavy metalDecolorizing with 1% activated carbon. Filtering the decolorized hydrolysate with a plate and frame filter to remove impurities. Concentrating the hydrolysate after impurity removal, and spray drying to obtain the finished product.

As described above, the present invention can be preferably implemented.

Claims (2)

1. The production process of maltodextrin is characterized by comprising the following preparation steps:

(1) taking a certain amount of corn starch, drying, weighing, adding distilled water according to the weight ratio of 1: 3-1: 6, and stirring and mixing for 10-15 min;

(2) adding NaOH solution with certain concentration into the corn starch slurry mixed in the step (1) to adjust the pH value to 6-7;

(3) adding CaCl with the specific gravity of 0.5-1% into the feed liquid with the pH adjusted in the step (2)₂Uniformly stirring the solution;

(4) adding medium-temperature α -amylase into the mixed solution in the step (3), carrying out heat preservation hydrolysis for 30-40min at the temperature of 80-90 ℃, heating to 100 ℃, and keeping for 20min for enzyme deactivation;

(5) and (4) adding a sodium hydroxide solution into the hydrolysate after enzyme deactivation in the step (4) to adjust the pH value to be neutral, and adding 1% by weight of activated carbon for decolorization.

(6) Filtering the hydrolysate decolorized in the step (5) by a plate and frame filter to remove impurities.

(7) And (4) concentrating the hydrolysate subjected to impurity removal in the step (6), and performing spray drying to obtain a finished product.

2. A process for the production of maltodextrin as claimed in claim 1, wherein: the concentration of NaOH added in the step (2) and the step (5) is 0.1-0.2%.