Method for preparing antioxidant by using crop straws

A crop straw and antioxidant technology, applied in the direction of chemical instruments and methods, and chemical change-inhibiting compositions, etc., can solve problems such as difficulty in meeting the needs of large-scale production, restrictions on the application of natural antioxidants, and no patent publications have been found. Achieve obvious biological activity and anti-oxidation ability, significant anti-oxidation ability, and promote the effect of healthy development

Active Publication Date: 2019-01-11
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw material resources required for these extracts are limited and expensive, it is difficult to meet the needs of large-scale production, and the separation and extraction process is complicated and the cost is high, which restricts the application of natural antioxidants
[0004] Through the search, no patent publications related to the patent application of the present invention have been found

Method used

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  • Method for preparing antioxidant by using crop straws

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing antioxidants from crop stalks, the steps are as follows:

[0028] Cut 400g of air-dried corn stalks to a length of 1-2cm, remove impurities, wash them, and then perform high-temperature liquid water treatment at 170°C for 30 minutes according to a solid-to-liquid ratio of 1:5, and then use mechanical extrusion to separate solids and liquids after venting and cooling A concentrated hydrolyzate was obtained. Adjust the pH value of the hydrolyzed solution to 2 with a hydrochloric acid solution with a concentration of 6M, incubate at a temperature of 50° C. for 4 hours to precipitate precipitates, further centrifuge and concentrate, and then freeze-dry to obtain the product.

[0029] The DPPH (1,1-diphenyl-2-trinitrophenylhydrazine) free radical scavenging rate was used to evaluate the antioxidant performance of the product, and at the same time, it was compared with the commonly used synthetic antioxidant BHT (2,6-di-tert-butyl-4 -methylphenol) for ...

Embodiment 2

[0031] A method for preparing antioxidants from crop stalks, the steps are as follows:

[0032] Cut 800g of air-dried wheat straw to a length of about 2.5cm, remove impurities, clean it, and perform high-temperature liquid water treatment at 150°C for 90 minutes according to a solid-to-liquid ratio of 1:7. After cooling, solid-liquid separation is performed to obtain a concentrated hydrolyzate. The pH value of the hydrolyzate was adjusted to 1 with concentrated sulfuric acid, and a precipitate was precipitated overnight at room temperature. The supernatant is removed from the container, and the obtained precipitate is spray-dried to obtain the product.

[0033] The DPPH (1,1-diphenyl-2-trinitrophenylhydrazine) free radical scavenging rate was used to evaluate the antioxidant performance of the product, and at the same time, it was compared with the commonly used synthetic antioxidant BHT (2,6-di-tert-butyl-4 -methylphenol) for comparison, the results are as follows figure 1 ...

Embodiment 3

[0035] A method for preparing antioxidants from crop stalks, the steps are as follows:

[0036] Process 100g of air-dried rice straw into a length of 3-4cm, remove impurities, wash it, and perform high-temperature liquid water treatment at 190°C for 5 minutes according to a solid-liquid ratio of 1:3, and separate solid-liquid to obtain a concentrated hydrolyzate. The pH value of the hydrolyzate was adjusted to 3 with acetic acid, and a precipitate was precipitated at a temperature of 75°C. The supernatant is removed from the container, and the obtained precipitate is spray-dried to obtain the product.

[0037] DPPH (1,1-diphenyl-2-trinitrophenylhydrazine) free radical scavenging rate was used to evaluate the antioxidant performance of the product, and at the same time compared with the commonly used synthetic antioxidant BHT (2,6-di-tert-butyl-4 -methylphenol) for comparison, the results are as follows figure 1 shown.

[0038] From figure 1 It can be seen that the antioxid...

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Abstract

The invention relates to a method for preparing an antioxidant by using crop straws. The method comprises: (1) raw material treatment, (2) treatment with high-temperature liquid-state water, (3) precipitation of hydrolyzate, and (4) separation and drying of precipitated substance, wherein the hydrolyzate in an acid-resistant container is layered after the step (3), the upper layer is supernatant,the lower layer is a precipitated material, the supernatant is removed from the container, the precipitated material is retained at the bottom portion of the container, and the substance obtained through spray drying or freeze drying is the antioxidant. According to the present invention, corn, wheat, rice and other large-scale crop straws with rich source are used as raw materials, and the treatment is performed with the high-temperature liquid-state water with no chemical adding, such that the preparation process is environment-friendly, the production process is simple, and the practicalityis strong; and the antioxidant prepared by using method can significantly scavenge DPPH free radicals, has remarkable anti-oxidation ability, and can be used in the fields of feeds and polymer materials.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of agricultural and sideline products, in particular to a method for preparing an antioxidant by utilizing agricultural crop stalks. Background technique [0002] Crop straw is one of the most abundant biomass resources on earth. In 2015, the theoretical resources of major crop straws in China were 1.04 billion tons, and the collectable resources were 900 million tons, mainly including corn straw, wheat straw, and rice straw. At present, except for being used as animal feed and returning straw to the field, it has not been used on a large scale in industry, and it often aggravates air pollution due to disorderly burning. Income increase and environmental protection are of great significance. [0003] Antioxidants are a class of substances that prevent the adverse effects of oxygen, and are widely used in polymer materials, petroleum products and food processing industries. Anti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K15/34
CPCC09K15/34
Inventor 王高升孙明霞孔军军刘泽华
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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