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A method for extracting pumpkin seed sterols based on subcritical fluid and molecular distillation

A subcritical fluid and molecular distillation technology, which is used in the separation of fat/fat, production of fat/fat, and fat production, can solve the problems of low product yield, difficulty in solvent recovery, large solvent consumption, etc., and achieves high purity, The effect of few steps and simple process route

Active Publication Date: 2020-11-20
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The industrialized production of domestic phytosterols is generally obtained by using the refined waste of oil as raw material, which is extracted and separated by solvent crystallization, but this method has the disadvantages of low product yield, difficult solvent recovery, and large solvent consumption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for extracting pumpkin seed sterols based on subcritical fluid and molecular distillation, carried out according to the following steps:

[0020] (1) Raw material pretreatment: select mature and plump pumpkin seeds as raw materials, dry them in an oven at 47°C for 51 hours to obtain pumpkin seeds with a moisture content of 2.5%, and then put the dried pumpkin seeds into a grinder for crushing After passing through a 40-mesh sieve, the seed kernel powder is obtained for subsequent use;

[0021] (2) Subcritical fluid extraction: Put the above-mentioned seed kernel powder into 210-mesh mesh silk and put it into the subcritical extraction kettle, use a vacuum pump to make the vacuum degree in the subcritical extraction kettle and the separation kettle be -0.1MPa, Inject the extraction solvent n-butane into the subcritical extraction kettle until the sample is completely submerged. Use a hot water circulation system to heat the extraction kettle so that the temperat...

Embodiment 2

[0028] A method for extracting pumpkin seed sterols based on subcritical fluid and molecular distillation, carried out according to the following steps:

[0029] (1) Raw material pretreatment: select mature and plump pumpkin seeds as raw materials, dry them in an oven at 52°C for 53 hours to obtain pumpkin seeds with a moisture content of 2.2%, and then put the dried pumpkin seeds into a grinder for crushing After passing through a 50-mesh sieve, the seed kernel powder is obtained for subsequent use;

[0030] (2) Subcritical fluid extraction: Put the above-mentioned seed kernel powder into 220-mesh mesh silk and put it into the subcritical extraction kettle, use a vacuum pump to make the vacuum degree in the subcritical extraction kettle and the separation kettle be -0.08MPa, Inject the extraction solvent n-butane into the subcritical extraction kettle until the sample is completely submerged. Use a hot water circulation system to heat the extraction kettle so that the tempera...

Embodiment 3

[0037] A method for extracting pumpkin seed sterols based on subcritical fluid and molecular distillation, carried out according to the following steps:

[0038] (1) Raw material pretreatment: select mature and plump pumpkin seeds as raw materials, dry them in an oven at 57°C for 55 hours to obtain pumpkin seeds with a moisture content of 2%, and then put the dried pumpkin seeds into a grinder for crushing After passing through a 60-mesh sieve, the seed kernel powder is obtained for subsequent use;

[0039] (2) Subcritical fluid extraction: Put the above-mentioned seed kernel powder into 230-mesh mesh silk and put it into the subcritical extraction kettle, use a vacuum pump to make the vacuum degree in the subcritical extraction kettle and the separation kettle be -0.05MPa, Inject the extraction solvent n-butane into the subcritical extraction kettle until the sample is completely submerged. Use a hot water circulation system to heat the extraction kettle so that the temperature...

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Abstract

The invention discloses a method for extracting pumpkin seed sterol based on a subcritical fluid and molecular distillation; the method comprises: pretreating a raw material, extracting with a subcritical fluid, desolventizing, deodorizing, esterifying, performing first molecular distillation and second molecular distillation to prepare the pumpkin seed sterol. The pumpkin seed sterol prepared herein is of food grade and high purity, the technical route employs subcritical fluid extraction and molecular distillation, the process route is simple, the steps are few, the cost is low, and the refining byproducts have better deep processing and marketing added value.

Description

technical field [0001] The invention belongs to the technical field of extraction and separation of natural products, and in particular relates to a method for extracting pumpkin seed sterols based on subcritical fluid and molecular distillation. Background technique [0002] Pumpkin seeds are the seeds of edible pumpkins. They are rich in nutrients and are precious non-staple food and health food. Health food such as processed food produced from pumpkin seeds has become a hot seller in domestic and foreign markets, and it is an important agricultural product that earns foreign exchange through export. Due to the supply of raw materials, the economic benefits of pumpkin seeds after harvesting are low, so that the actual problem of increasing production without increasing efficiency has emerged. Pumpkin seeds contain a large amount of natural oil (350-600g / kg), and there are differences between different origins and varieties. Natural pumpkin seed oil contains high content ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B1/04C11B1/10C11B3/00C11B3/12C11B7/00C11C3/00
CPCC11B1/04C11B1/10C11B3/001C11B3/12C11B7/00C11C3/003
Inventor 李全宏于国泳聂立俊
Owner CHINA AGRI UNIV
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