Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for extracting pigment of sweet potato leaves

An extraction method and sweet potato leaf technology are applied in the field of sweet potato leaf pigment extraction, and can solve the problems of high requirements on equipment and operating conditions, expensive production equipment, unsafety and the like

Inactive Publication Date: 2018-05-08
湖南宇山玉月农业科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The steam extraction method has the characteristics of simple equipment, convenient operation and low cost, but the extraction rate of a single steam extraction method is low
The product obtained by organic solvent extraction method is not pure, and unsafe, easy to pollute the environment; supercritical CO 2 The fluid extraction method has the advantages of high extraction rate and less impurities in the product, but this method has high requirements on equipment and operating conditions, and the production equipment is expensive, so it is rarely used in industrial production in China

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Sweet potato leaf pigment extraction steps:

[0019] 1) Crumble the sweet potato leaves into the extraction tank, add orange peel oil to extract for 3 hours, filter, continue to extract the filter residue for 3 times, filter, and collect the filtrate;

[0020] 2) Freeze the filtrate in 1) at -20°C for 24 hours, take it out, and filter;

[0021] 3) Concentrate the filtrate in 2) under reduced pressure to remove the orange peel oil, and dry it to obtain the product.

Embodiment 2

[0023] Sweet potato leaf pigment extraction steps:

[0024] 1) Crumble the sweet potato leaves into the extraction tank, add an appropriate amount of orange peel oil to extract for 4 hours, filter, continue to extract the filter residue for 2 times, filter, and collect the filtrate;

[0025] 2) Freeze the filtrate in 1) at -30°C for 28 hours, take it out, and filter;

[0026] 3) Concentrate the filtrate in 2) under reduced pressure to remove the orange peel oil, and dry it to obtain the product.

Embodiment 3

[0028] Sweet potato leaf pigment extraction steps:

[0029] 1) Crush the sweet potato leaves and put them in the extraction tank, add an appropriate amount of orange peel oil to extract for 2 hours, filter, continue to extract the filter residue for 3 times, filter, and collect the filtrate;

[0030] 2) Freeze the filtrate in 1) at -18°C for 30 hours, take it out, and filter;

[0031] 3) Concentrate the filtrate in 2) under reduced pressure to remove the orange peel oil, and dry it to obtain the product.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for extracting pigment of sweet potato leaves. By adopting an oil freezing method for extraction, the method comprises the following steps that 1, the sweet potato leaves are crushed and put into a soaking extraction tank, a suitable amount of orange oil is added for soaking extraction for 1-4 hours, filtration is conducted, filter residues are continuously subjected to soaking extraction for 2-3 times, filtration is conducted, and filtrate is collected; 2, the filtrate in the step 1 is frozen for 24-36 hours, taken out and filtered; 3, the filtrate in the step2 is subjected to decompression concentration, the orange oil is removed, and the pigment is obtained after drying. According to the method, the pigment of the sweet potato leaves is extracted and purified by means of the oil freezing method, and the extraction amount and purity of the extraction are improved.

Description

technical field [0001] The invention belongs to a pigment extraction method, in particular to a method for extracting sweet potato leaf pigment. Background technique [0002] Sweet potato leaves (perennial vine herb) are also called sweet potato leaves, which are the leaves on the stems during the growth of sweet potatoes. Studies have found that sweet potato leaves have health functions such as improving immunity, stopping bleeding, lowering blood sugar, detoxifying, and preventing night blindness. Sweet potato leaves can make the skin smooth. Regular consumption can prevent constipation, protect eyesight, keep skin delicate and delay aging. In Europe, America, Japan, Hong Kong and other places, there is a "sweet potato leaf fever". In addition, sweet potato leaves contain a lot of natural green pigment and melanin. People generally eat young leaves, and other "old leaves" are discarded. We can reuse the "old leaves" to extract natural plant dyes to supplement plants. Th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C11B9/02
CPCC09B61/00C11B9/02
Inventor 卢洪成
Owner 湖南宇山玉月农业科技有限公司