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Method for producing inulin by adopting membrane separation process

A membrane separation method and inulin technology, which are applied in the field of natural substance extraction, can solve the problems of incomplete removal of bitterin, complicated extraction of inulin, etc., and achieve good production and application prospects, good operational stability, and good specificity. Effect

Inactive Publication Date: 2016-06-15
WEIDE QINGHAI BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved in the present invention is to provide a method for producing inulin by using the whole film process, so as to solve the disadvantages of complex inulin extraction operation and incomplete removal of bittern in the product in the prior art.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) The inulin extract is filtered and sterilized through a polyvinyl chloride hollow fiber membrane with a pore size of 2-5 μm to obtain a first-grade filtrate. The operating temperature of the microfiltration is: 45°C, and the working pressure: the inlet pressure is 3bar, and the outlet pressure is 2bar , the pressure difference is 2.5bar;

[0032] (2) The primary filtrate obtained in step (1) is filtered by a modified acrylic ultrafiltration membrane with a pore size of 10 to 25 nm to obtain a secondary filtrate. 6bar, the outlet pressure is 3~5bar, and the pressure difference is 3.5~5.5bar;

[0033] (3) The secondary filtrate obtained by the nanofiltration membrane filtration step (2) with a pore size of 1 to 2 nm is obtained to obtain a tertiary filtrate. The operating temperature of the nanofiltration is: 55° C., and the working pressure: the inlet pressure is 3 bar, and the outlet pressure is 1 bar. The pressure difference is 2.5bar;

[0034] (4) The tertiary f...

Embodiment 2

[0040](1) The inulin extract is filtered and sterilized through a polyvinyl chloride hollow fiber membrane with a pore size of 2-5 μm to obtain a first-grade filtrate. The operating temperature of the microfiltration is: 45°C, and the working pressure: the inlet pressure is 3bar, and the outlet pressure is 2bar , the pressure difference is 2.5bar;

[0041] (2) The primary filtrate obtained in step (1) is filtered by a modified acrylic ultrafiltration membrane with a pore size of 10-25nm to obtain a secondary filtrate. The operating temperature of the ultrafiltration is: 65°C. is 5bar, and the pressure difference is 3.5bar;

[0042] (3) The secondary filtrate obtained by the nanofiltration membrane filtration step (2) with a pore size of 1 to 2 nm is obtained to obtain a tertiary filtrate. The operating temperature of the nanofiltration is: 65° C., and the working pressure: the inlet pressure is 3 bar, and the outlet pressure is 1 bar. The pressure difference is 2bar;

[0043...

Embodiment 3

[0049] (1) The inulin extract is filtered and sterilized through a polyvinyl chloride hollow fiber membrane with a pore size of 2-5 μm to obtain a first-grade filtrate. The operating temperature of the microfiltration is: 45°C, and the working pressure: the inlet pressure is 3bar, and the outlet pressure is 2bar , the pressure difference is 2.5bar;

[0050] (2) The primary filtrate obtained in step (1) is filtered by a modified acrylic ultrafiltration membrane with a pore size of 10-25 nm to obtain a secondary filtrate. is 3bar, and the pressure difference is 2bar;

[0051] (3) The secondary filtrate obtained by the nanofiltration membrane filtration step (2) with a pore size of 1 to 2 nm is obtained to obtain a tertiary filtrate. The operating temperature of the nanofiltration is: 50° C., and the working pressure: the inlet pressure is 2 bar, and the outlet pressure is 1 bar. The pressure difference is 1 bar;

[0052] (4) The tertiary filtrate that step (3) obtains absorbs ...

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Abstract

The invention discloses a method for producing inulin by adopting a membrane separation process and belongs to the technical field of biological extraction and separation. The method for producing the inulin by adopting the membrane separation process comprises the following steps: carrying out three-stage filtration on an inulin extracting solution by virtue of a hollow fiber membrane, an ultrafiltration membrane and a nanofiltration membrane, and then carrying out adsorption treatment by utilizing macroporous resin, so that purity of the inulin can reach more than 99% finally, and yield also can reach more than 90%. The macroporous resin adopted in the invention is synthesized through multi-stage reaction polymerization and has the advantages of high adsorption rate and good specificity.

Description

technical field [0001] The invention belongs to the technical field of natural substance extraction, and in particular relates to a method for producing inulin by a membrane separation method. Background technique [0002] Membrane separation process is a separation technology driven by pressure. During the filtration process, the feed liquid is pressurized by the pump, and the feed liquid flows along the surface of the filter membrane at a certain flow rate. The substance molecules larger than the membrane molecular weight cut-off do not flow back to the tank through the membrane, and the substances or molecules smaller than the membrane molecular weight cut-off Through the membrane, the dialysate is formed. This filtration process is not dead-end filtration but cross-flow filtration. Therefore, the membrane system has two outlets, one is the reflux (concentrate) outlet, and the other is the dialysate outlet. The cross-flow method avoids the clogging phenomenon in the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/18C08F261/04C08F212/36C08F220/28
CPCC08B37/0054C08B37/0003C08F261/04
Inventor 黄振华杨云王红钰赵国萍
Owner WEIDE QINGHAI BIOTECH
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