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Method for extracting pectin from green sunflower plates by salt

A technology of sunflower green and sunflower, applied in the field of pectin extraction technology, can solve the problems of heavy processing workload, affecting the performance of pectin, increasing the size, etc., and achieve the effect of high raw material utilization rate, low solid-liquid ratio, and good appearance

Inactive Publication Date: 2019-04-12
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

3. Ester group-COOCH in pectin 3 And the distribution of carboxyl COOH in pectin also affects the performance of pectin
When the salt concentration is greater than 0.5%, the organic salt will increase correspondingly with the ratio of material to liquid, and the workload of liquid treatment such as filtration and alcohol precipitation will be large

Method used

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  • Method for extracting pectin from green sunflower plates by salt
  • Method for extracting pectin from green sunflower plates by salt
  • Method for extracting pectin from green sunflower plates by salt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: A method for extracting pectin from sunflower green plate using salt, including the following steps:

[0023] Step (1): Select a fresh sunflower plate that has been de-seeded, rinse it several times with clean water to remove sand and dust, and drain it. The water content of the fresh sunflower plate is 80-90%;

[0024] Step (2): Cut the green plate into pieces with a diameter of 0.8cm;

[0025] Step (3): Put the lumpy sunflower green plate into a constant temperature water bath to inactivate the enzyme at a temperature above 95°C for 15 minutes, filter with a 150-mesh nylon cloth, and use the filter cake for later use;

[0026] Step (4): Use the filter cake obtained in step (3) as the extraction raw material, add distilled water at a material-to-liquid ratio of 1:15, add 0.3% ammonium oxalate to extract the raw material for pectin, and extract at 80°C for 60 minutes;

[0027] Step (5): filtering, separating the residue and collecting the filtrate;

[0028] Step (6): Th...

Embodiment 2

[0030] Example 2: A method for extracting pectin from sunflower green plates using salt, including the following steps: the green plates are cut into 1.0cm pieces; the block-shaped sunflower green plates are placed in a constant temperature water bath above 95°C to inactivate the enzyme for 18 minutes, Filter with 200 mesh nylon cloth, and filter cake for use; filter cake is used as the raw material for extraction, add distilled water according to the material-to-liquid ratio of 1:5, add 0.2% ammonium oxalate to extract the raw material for pectin, and extract for 45 minutes at 85°C; filter, The filtrate was subjected to rotary distillation under reduced pressure at 60°C and concentrated to 0.3 times the volume of the original solution to obtain a concentrated sunflower disk extract; ethanol precipitation was carried out with ethanol with a concentration of 90%-95% and an amount of 1.2-1.6 times the volume of the concentrated solution. The sequence of alcohol precipitation is to...

Embodiment 3

[0031] Example 3: A method for extracting pectin from sunflower green plate using salt, including the following steps: the green plate is cut into 1.5 cm pieces; the block-shaped sunflower green plate is placed in a constant temperature water bath above 95°C to inactivate the enzyme for 22 minutes, Filter with 300 mesh nylon cloth, and filter cake for use; filter cake as the raw material for extraction, add distilled water according to the material-to-liquid ratio of 1:10, add sodium citrate with a concentration of 0.8% to extract pectin, and extract at 90°C for 20 minutes; filter; , The filtrate was subjected to vacuum rotary distillation at 65°C and concentrated to 0.4 times the volume of the original solution to obtain a concentrated sunflower disk extract; use ethanol with a concentration of 90%-95% and an amount of 2 times the volume of the concentrated solution for alcohol precipitation. The precipitation sequence is that the extract is introduced into ethanol, and the alc...

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Abstract

The invention belongs to the technical field of pectin extraction, and provides a method for extracting pectin from green sunflower plates by salt. The green sunflower plates are used as raw materials, enzyme deactivation is performed in a water bath kettle in constant temperature, filtering is conducted, and an enzyme-deactivated solution is removed; distilled water is added to sediment, ammoniumoxalate or sodium citrate is added for extraction, filtering is performed, filtrate is subjected to decompression and rotary distillation, and concentrated sunflower plate extract is obtained after concentration, the concentrated solution is precipitated by ethanol, still stands and then is filtered to obtain pectin, the pectin is washed once or twice with anhydrous ethanol for dehydration, thenpasses through a 60-mesh sieve, naturally dried or dried at 40 degree or below, and crushed to obtain pectin powder. The method for extracting the pectin has high pectin extraction rate, the product is attractive without decolorization treatment, the material-liquid ratio is small, and the use amount of solvents and salt is significantly reduced, the utilization ratio of the sunflower plate is effectively improved, waste utilization is achieved, and the added value of the sunflower industry is increased.

Description

Technical field [0001] The invention belongs to the technical field of pectin extraction technology, and specifically relates to a method for extracting pectin from sunflower green plates by using salt. Background technique [0002] The sunflower planting area in my country is extensive, and a large number of sunflower trays are discarded, causing environmental pollution and waste of resources. Sunflower plate contains 15-25% pectin, which is rich in resources and cheap and easy to get. Therefore, it is of social and economic significance to vigorously develop my country's abundant sunflower disk resources and increase its utilization rate. Sunflower pectin is a natural polymer with unique molecular structure, biological activity and functionality, and its discovery has been a research hotspot in the chemical, pharmaceutical and food fields. A lot of research work is devoted to improving quality and increasing yield, but nearly 20-30% of pectin is inevitably degraded and lost d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/06
CPCC08B37/0048
Inventor 马雪梅京晶许晶晶王京宝朱海林胡志勇马忠平
Owner ZHONGBEI UNIV
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