CN102134401B

CN102134401B - Method for extracting gromwell pigment by utilizing subcritical liquid

Info

Publication number: CN102134401B
Application number: CN201010621763XA
Authority: CN
Inventors: 陈运霞; 李俊和; 陈文山; 杨明; 侯丽娟
Original assignee: Chenguang Biotech Group Co Ltd
Current assignee: Chenguang Biotech Group Co Ltd
Priority date: 2010-12-27
Filing date: 2010-12-27
Publication date: 2013-12-04
Anticipated expiration: 2030-12-27
Also published as: CN102134401A

Abstract

The invention relates to a method for extracting gromwell pigment, in particular to the method for extracting the gromwell pigment by utilizing subcritical liquid. The method comprises the following steps: firstly, preparing material: cleaning alkanet, drying in the air and pulverizing; secondly extracting: placing the alkanet in an extraction pot, vacuumizing the extraction pot until the pressure reaches minus 0.08 MPa, introducing the subcritical liquid until the subcritical liquid is 6 to 10 centimeters higher than the materials, carrying out continuous extraction for two times at the extraction temperature ranging from 30 to 55 DEG C and the pressure ranging from 0.4 to 0.6 MPa for 40 to 100 minutes; thirdly, depressing and analyzing: pressing solvent from an extraction kettle into an analyzing pot, vacuumizing until the pressure of the analyzing pot is reduced to minus 0.04 to minus 0.08 MPa and obtaining the gromwell pigment at the temperature ranging from 30 to 45 DEG C; and gasifying the subcritical liquid, pressurizing by a compressor, and condensing for cycle use.

Description

Utilize the method for subcritical fluid extraction Alkannia

Technical field

The present invention relates to a kind of method that extracts Alkannia, particularly utilize the method for subcritical fluid extraction Alkannia.

Background technology

Alkannia is the edible coloring agent extracted from the gromwell root root, the red pool of Asian puccoon is bright-coloured, pure, strong coloring force, seepage force is strong, physical and chemical performance is stable, and there is multiple physiology and the pharmic functions such as antisepsis and anti-inflammation, the growth of promotion granulation tissue, be with a wide range of applications in food, healthcare products, pharmaceutical industries.China's " foodstuff additive use hygienic standard " regulation: can be used for fruit juice (flavor) beverage class, ice cream, ice lolly, fruit wine, apply more extensive.The shortcomings such as up to now, the disclosed method of extracting Alkannia from Radix Arnebiae (Radix Lithospermi) has SCF-CO 2 and organic solvent-normal hexane extraction, and organic solvent extraction all exists that extraction efficiency is low, trivial operations, pigment yield are low; The SCF-CO 2 working pressure is large, high to equipment requirements, and cost is higher, is difficult to scale operation.

Summary of the invention

In order to overcome the shortcoming of prior art, the invention provides a kind of method of utilizing the subcritical fluid extraction Alkannia, its technique is simple, easy to operate, and extraction time is short, and solvent consumption is few, and dissolvent residual is low.

The present invention solves the technical scheme that its technical problem takes: comprise the following steps: (1), get the raw materials ready: Radix Arnebiae (Radix Lithospermi) is cleaned, dries, pulverized; (2), extraction: the Radix Arnebiae (Radix Lithospermi) powder is put into to extractor, and be evacuated to-0.08MPa of extractor, pass into subcritical fluids to exceeding material 6-10cm, extraction temperature is 30-55 ℃, pressure is 0.4-0.6MPa, continuous extraction twice, and extraction time is 40-100 minute; (3), decompression resolves: the extraction kettle solvent is pressed into to the parsing tank, be evacuated to the pressure of resolving tank to-0.04～-0.08MPa, resolution temperature 30-45 ℃, obtain Alkannia; The subcritical fluids gasification, then recycle after compressed machine pressurization condensation.

Described subcritical fluids is propane, butane or Trimethylmethane.

The invention has the beneficial effects as follows to have adopted and form the subcritical fluids with stronger dissolving power and diffusibility under lower temperature, pressure, by controlling pressure, the temperature of fluid under subcritical state, can from Radix Arnebiae (Radix Lithospermi), extract Alkannia, concrete advantage is as follows:

1, technique is simple, easy to operate, and extraction time is short, and solvent consumption is few, and steam and power consumption are lower;

2, propane used, butane or Trimethylmethane boiling point are low is gaseous state at normal temperatures and pressures, and compressed machine compression, cooling rear reusable edible, can be to environment; 3, because of the emergent pressure of subcritical state working pressure far below solvent, low for equipment requirements, equipment cost, lower than overcritical equipment, can reach suitability for industrialized production ability low-cost, the scale operation Alkannia; 4, extraction process and the evaporative process temperature is low and the time is short, less to the Alkannia loss, the extraction yield of final Alkannia can reach more than 93%; 5, subcritical fluid extraction, extraction efficiency is high, simple to operate, and fully, in the rear material of extraction slag, pigment is residual less for the high extraction of yield; 6, the boiling point such as propane, butane is low, under normal temperature, is gas, and under reduced pressure, in Alkannia, solvent more easily removes, and in the finished product Alkannia, total solvent is residual lower than 25ppm.

The accompanying drawing explanation

Below in conjunction with accompanying drawing, the present invention is further described.

Accompanying drawing is technique functional diagram of the present invention.

Embodiment

Example 1:

Drop into the Radix Arnebiae (Radix Lithospermi) 28kg pulverized, squeeze into subcritical butane fluid, at 40 ℃, under 0.45MPa pressure, extract extraction time 50min.The butane that has dissolved Alkannia is pressed into to the parsing tank, takes out negative pressure to-0.06MPa under 45 ℃, obtain Alkannia 0.91kg, Alkannia yield 3.25%, percentage extraction 93.5%.

Example 2:

Drop into the Radix Arnebiae (Radix Lithospermi) 28kg pulverized, squeeze into subcritical Trimethylmethane fluid, at 45 ℃, under 0.45MPa pressure, extract extraction time 50min.The butane that has dissolved Alkannia is pressed into to the parsing tank, takes out negative pressure to-0.065MPa under 45 ℃, obtain Alkannia 0.94kg, Alkannia yield 3.36%, percentage extraction 95.6%.

Claims

1. a method of utilizing the subcritical fluid extraction Alkannia is characterized in that: following steps, consist of: (1), get the raw materials ready: Radix Arnebiae (Radix Lithospermi) is cleaned, dries, pulverized; (2), extraction: the Radix Arnebiae (Radix Lithospermi) powder is put into to extractor, and be evacuated to-0.08MPa of extractor, pass into subcritical fluids to exceeding material 6-10cm, extraction temperature is 45-55 ℃, pressure is 0.4-0.6MPa, continuous extraction twice, and extraction time is 40-100 minute; (3), decompression resolves: the extraction kettle solvent is pressed into to the parsing tank, be evacuated to the pressure decreased of resolving tank to-0.04～-0.08MPa, temperature 30-45 ℃, obtain Alkannia; The subcritical fluids gasification, then recycle after compressed machine pressurization condensation;

Described subcritical fluids is propane, butane.