The separation purification method of shikimic acid
Technical field
The present invention relates to natural product chemistry, after more specifically referring to extract essential oil in the anistree leaf, the method for extraction from residue, separation, purifying shikimic acid.
Background technology
Shikimic acid (shikimic acid), chemistry is called 3,4,5-trihydroxy--1-cyclohexyl-1-carboxylic acid, molecular formula is C
7H
10O
5Molecular weight is 174.16.Soluble in water, be insoluble in chloroform, benzene and sherwood oil.185 ℃~187 ℃ of fusing points.Being a kind of monomeric compound that extracts from the fruit star anise of Winteraceae plant anise, anti-inflammatory, analgesic activity are arranged, is the cancer therapy drug intermediate.The unique of World Health Organization's affirmation at present is the raw material synthetic with the shikimic acid to the effective medicine Tamiflu of H5N1 avian influenza virus exactly; Beijing University of Chinese Medicine's Pharmacology Lab early-stage Study finds that first shikimic acid has obvious anti-thrombosis function, can suppress artery and vein thrombus and cerebral thrombosis.Shikimic acid belongs to high value added product, and its market price is 400 dollars/kilogram at present, and its price is also in rising.
All the time, shikimic acid all makes with synthesis method, and high-purity shikimic acid process for purification report also seldom.With the separating substances of shikimic acid and similar also is the thing of comparison difficulty always.
Nineteen sixty Simonart and Wiaux had once reported the method (Nature, 186,78-79,1960) with anion exchange process shikimic acid fermented liquid.But they well do not separate by products such as shikimic acid and dehydroshikimis acid.The Japanese is studying the separation method of shikimic acid always recently, and some patents have been applied for, comprising two pieces of world patents (international publication PCT/IB03/00131 and PCT/JP01/02086), but these methods all are methods of extracting from shikimic acid fermented liquid or anistree fruit star anise.
Star anise belongs to integration of drinking and medicinal herbs, both can be used for eating at home, also be used in the traditional Chinese medical science prescription, very big at consumption among the people, and at present most in the world shikimic acid all extracts from star anise and obtains, though extracting method is very ripe, the resource-constrained of star anise can not satisfy the demand of present All Around The World for shikimic acid at all; And the resource of anistree leaf is very sufficient, shikimic acid content wherein is probably about 5% after testing, but present anistree leaf mainly is to be used for industrialization to extract its essential oil, and remaining waste residue (tankage) goes out of use, well do not utilized, very unfortunate, after testing, the content of shikimic acid is about 10~20% in the tankage.
Present method can extract shikimic acid (tankage) from the waste residue of anistree leaf essential oil extraction back efficiently, has reduced the production cost of shikimic acid greatly.Be a kind of good shikimic acid process for purification, and can be, accomplish the largest optimization configuration of resource, thereby provide an economical and practical industrialized producing technology for the extraction separation of shikimic acid the waste liquid utilization of waste material.
Summary of the invention
The purpose of this invention is to provide a kind of from anistree leaf, extract essential oil after, from this residue, extract the method for shikimic acid.
The present invention adopts negatively charged ion and cationic exchange resin adsorption to replace wash-out, removes impurity, extracts the method for shikimic acid.
The present invention is meant that anistree leaf is through fat-soluble solvent, as the residue that obtains behind the essential oil in the anistree leaf of extractions such as normal hexane, with this residue with water dissolution after, adopt anionite-exchange resin, anionite-exchange resin is advisable with basic resin, eluent is advisable with strong alkali solution, and is best with NaOH and KOH liquid especially.
This method is finished by utilizing OH type resin, make the alkalinisation treatment process that contains shikimic acid solution and anionite-exchange resin adsorption process to merge into a step.
The anionite-exchange resin that present method is used is the best with this quasi-alkali resin of 717 strong-basicity styrene series (Shanghai remittance fat).Resin demand will carry out equivalent conversion according to total ionic weight in the shikimic acid stock liquid, that is to say that the loading capacity of resin will surpass the molar weight of the whole ions (comprising amino acid, organic acid, chloride ion) in the stock liquid.
Various stock liquids after the alkalinisation treatment utilize plastic resin treatment in order to following method.
Absorption: stock liquid is flow through anionite-exchange resin shikimic acid is adsorbed on the resin, temperature is controlled at below 90 ℃ when crossing post, crosses post liquid PH and is controlled at neutrality or alkalescence, flow velocity SV=1~5 (being advisable with SV=1~3).After the absorption,, remove impurity such as carbohydrate with the pure water rinsing resin of 1~5 times of column volume (being advisable) with 3 times of amounts.
Wash-out: shikimic acid is eluted from resin, can utilize strong alkaline aqueous solution.Solution passes through resin with 3 ~ 5 times of amount column volumes with flow velocity SV=1~5 (being advisable with SV=1~3), shikimic acid can be eluted.When it should be noted that to some impurity beyond the removal dehydroshikimis acid or class edge thing, eluent is good with aqueous alkali, and concentration is 1%~10%NaOH or KOH, and the best is the 1%~5%NaOH or the KOH aqueous solution.Can be referring to the HPLC analysis chart of Fig. 2.
Remove sodium ion: in the NaOH aqueous solution or KOH aqueous solution wash-out, elutriant can be removed sodium ion with strong acidic ion resin.The Zeo-karb that present method is used is the best with 732 strongly acidic styrenes system (Shanghai remittance fat) this class highly acidic resin.
The shikimic acid solution of gained can utilize the method for concentrating under reduced pressure cooling crystallization to obtain the crystallization of shikimic acid, and recrystallization solvent is water or C
1-C
4Alcohol or rare alcohol, recrystallization carries out at-15~15 ℃.
Beneficial effect:
Invention utilizes the residual residue production shikimic acid after anistree leaf is produced volatile oil, and technology is simple, and its technological process does not need specific installation, can produce high-pure shikimic acid, the tool high-recovery can reach more than 80% high purity, can reach more than 98%, reduce the production cost of shikimic acid greatly, and saved the energy, with short production cycle, the consumption solvent is few, does not use advantages such as the organic solvent environmental pollution is little substantially.Being suitable for general pharmaceutical factory produces.
Description of drawings
Fig. 1 is the operational path of extraction separation shikimic acid from anistree leaf essential oil extraction back is residual.
Fig. 2 is the analysis chart of the isolating HPLC of shikimic acid.
Embodiment
Embodiment 1
Anistree leaf essential oil extraction back residue 100g (shikimic acid content is 12% after testing) with the dissolving of 200ml pure water, adds the gac (Haiyang Chemical Plant, Qingdao) of 5g, and room temperature~45 ℃ stirring 30min filters and obtains destainer.500ml adorns post with 717 strong-basicity styrene series (Shanghai remittance fat), and the NaOH solution with 3% is treated to OH type resin column with it.Above-mentioned destainer is crossed the OH type anion-exchange resin column of handling, the absorption shikimic acid.The 1000ml pure water cleans, and uses the NaOH wash-out of 1500ml3% afterwards, obtains containing the position of shikimic acid.Sodium ion is removed by H type storng-acid cation exchange resin (732 strongly acidic styrenes system, fat converges in Shanghai) 500ml in this position.The solution concentration of gained.Leave standstill crystallization in the time of 0~4 ℃, get shikimic acid (9.7g, 98.5%).
Purity check chromatographic condition: instrument: high performance liquid chromatograph is that U.S. Waters company produces Waters2690,2487 UV-detector; Chromatographic column is diol post (4.6 * 250mm, 5 μ m); Detect wavelength: 210nm; Column temperature: 25 ℃; Moving phase: 98% acetonitrile: 2%0.1% phosphate aqueous solution; Flow velocity: 0.8ml/min; The retention time of shikimic acid is 11min.
Embodiment 2
Anistree leaf essential oil extraction back residue 1000g (shikimic acid content is 10% after testing) with the dissolving of 2000ml pure water, adds the gac (with the pure medicine of light) of 50g, and room temperature~45 ℃ stirring 30min filters and obtains destainer.5000ml adorns post with 717 strong-basicity styrene series (Shanghai remittance fat), and the NaOH solution with 5% is treated to OH type resin column with it.Above-mentioned destainer is crossed the OH type anion-exchange resin column of handling, the absorption shikimic acid.The 10000ml pure water cleans, and uses the NaOH wash-out of 15000ml5% afterwards, obtains containing the position of shikimic acid.Sodium ion is removed by H type storng-acid cation exchange resin (732 strongly acidic styrenes system, fat converges in Shanghai) 5000ml in this position.The solution concentration of gained.Leave standstill crystallization in the time of 0~4 ℃, get shikimic acid (88.5g, 98.2%).
Embodiment 3
Anistree leaf essential oil extraction back residue 1000g (shikimic acid content is 10% after testing) with the dissolving of 2000ml pure water, adds the gac (with the pure medicine of light) of 50g, and room temperature~45 ℃ stirring 30min filters and obtains destainer.5000ml adorns post with 717 strong-basicity styrene series (Shanghai remittance fat), and the NaOH solution with 10% is treated to OH type resin column with it.Above-mentioned destainer is crossed the OH type anion-exchange resin column of handling, the absorption shikimic acid.The 10000ml pure water cleans, and uses the NaOH wash-out of 15000ml10% afterwards, obtains containing the position of shikimic acid.Sodium ion is removed by H type storng-acid cation exchange resin (732 strongly acidic styrenes system, fat converges in Shanghai) 5000ml in this position.The solution concentration of gained.Leave standstill crystallization in the time of 0~4 ℃, get shikimic acid.
Embodiment 4
Anistree leaf essential oil extraction back residue 1000g (shikimic acid content is 10% after testing) with the dissolving of 2000ml pure water, adds the gac (with the pure medicine of light) of 50g, and room temperature~45 ℃ stirring 30min filters and obtains destainer.5000ml adorns post with 717 strong-basicity styrene series (Shanghai remittance fat), and the NaOH solution with 1% is treated to OH type resin column with it.Above-mentioned destainer is crossed the OH type anion-exchange resin column of handling, the absorption shikimic acid.The 10000ml pure water cleans, and uses the NaOH wash-out of 15000ml1% afterwards, obtains containing the position of shikimic acid.Sodium ion is removed by H type storng-acid cation exchange resin (732 strongly acidic styrenes system, fat converges in Shanghai) 5000ml in this position.The solution concentration of gained.Leave standstill crystallization in the time of 0~4 ℃, get shikimic acid.