The subcritical fluids are mainly liquefied butane and propane.The boiling point of most of the components in the solvent is below 0℃.Among them,the boiling point of propane is-42.07℃and that of butane is-0.5℃.It is a gas at room temperature and pressure,and it is a liquid after pressure.The basic principle of the process is:under normal temperature and pressure(0.3 MPa to 0.8 MPa),with subcritical fluid countercurrent extraction oil embryos(such as peony seeds,grape seeds,wheat germ,marigold granule see grass seed,walnut meat,soybean,peanut,month,etc.),and then make the mixed oil and meal of reduced pressure gasification of solvent,solvent after gasification gas after compressor condensing liquid recycled again.The processing scale of the technology equipment is 5-200 tons per day.
The complete set of sub-critical biological extraction equipment is mainly used in:
1,Marigold lutein ointment and other fat soluble natural pigment extraction at low temperature;
2.Subcritical extraction of arachidonic acid(ARA);
3 and precious plant oils of subcritical extraction:wheat germ oil,peony seed oil,ganoderma lucidum spore oil,seabuckthorn seed oil,flax seed oil,hemp seed oil,pyrethrum oil,grape seed oil,rice bran oil,shrimp,green oil dementholized,crown fruit oil,green spines nut oil,tea seed oil,bitter almond oil,pomegranate seed oil,pine nut oil,hazelnut oil,safflower seed oil,wolfberry seed oil,month amaranth seed oil,black currant oil,coix seed kernel oil,oil-,hami melon seed kernel oil,etc.
4.Comprehensive development and deep processing of walnut kernel;
5.Comprehensive development and utilization of soybean and peanut:a complete set of equipment including soybean(peanut)oil,soybean protein,peanut protein,defatted low denaturation and low temperature(peanut)soybean meal(edible grade)and soybean(peanut)protein can be developed comprehensively;
6.Comprehensive development and production of cottonseed kernel:cottonseed oil,detoxification and defatting low denaturation cottonseed protein;
7.Extraction of lipid soluble components of Chinese medicinal materials;
8.Extraction of natural flavor oil and oil.
Cinnamon oil,large(small)anise oil,chili oil,litsea cubeba oil,jasmine extract,orchid extract,wintersweet flower extract,black and red flower extract,acacia extract,osmanthus extract,gardenia extract,lilies of the extract,extract narcissus,tuberose concrete,hops extract,violet extract,rose extract,rose extract,red orange oil,costus root oil,vetiver oil,iris oil,camphor oil and cedar wood oil,sandalwood oil etc.
Subcritical oil extraction patented advantages:
(1)Extracting at room temperature and desolving at low temperature(less than 40℃),the heat-sensitive substances in the extracted oil and meal are not easy to be destroyed,and the pigment yield in the extract is high;
(2)the raw material consumption solvent is less than 8kg;
(3)the heat source is steam or 90℃hot water;
(4)The working pressure of the equipment is 0.3-0.7 Mpa;
(5)Complete set of extraction equipment can handle 100 tons/day per line;
(6)More than 100 sets of production lines have been installed since 1995;
(7)low pollution,extraction solvent recycling.
Butane and propane are state-approved processing AIDS for the food industry
See Usage Rules for details:
National standard of the People's Republic of China GB_2760-2011_ National Standard for Food Safety _ Standard for Use of Food Additives
National Health and Family Planning Commission of the People's Republic of China
http://www.nhfpc.gov.cn/zwgkzt/psp/201106/51947.shtml
Appendix C:Provisions for the Use of Processing Aids for the Food Industry(hereinafter referred to as"Processing Aids")
Table C.2,page 64 List of processing AIDS requiring specified functions and scope of use(excluding enzyme preparations)
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