30results about How to "Shorten separation and purification time" patented technology

The invention discloses a synthesizing method of gamma-aminopropyl triethoxysilane, comprising the following steps of: (1) adding a toluene solution dissolved with a catalyst and the gamma-aminopropyl triethoxysilane to a reaction still under the condition of vacuum, adding ammonia in a stirring state, and increasing the temperature of materials inside the reaction still to 60-70 DEG C to react for 4-7 hours at the reaction pressure of 0.5-3 MPa; (2) after amination reaction is finished, filtering, separating and removing side products, and adding filter liquor to a distilling still; (3) after the top temperature of the distilling still is more than or equal to 102 DEG C, reducing the temperature of the materials inside the distilling still to be less than or equal to 80 DEG C, and carrying out reduced pressure distillation at vacuum degree of more than or equal to 0.099 MPa so as to obtain the gamma-aminopropyl triethoxysilane after the reduced pressure distillation. The invention enhances the purity of synthesized products by more than 99 percent (GC) and expands the application fields to industries, i.e. electronic and electric products, high-performance catalyst preparation, nanometer materials, superfine dispersing materials, and the like which have higher requirements for product purity.

The invention provides a method for preparing salvianolic acid B through separation by means of flash chromatography, which is a preparation method for separating out and purifying the salvianolic acid B with purity higher than 98.0 percent from salvia miltiorrhiza as medicinal material. After the medicinal material is extracted and extracted with organic solvent, ethyl acetate extract is obtained, and with methanol-water as an elution system, a flash chromatograph and a medium / low pressure chromatographic column with C18 bonded phase as packing material are adopted to automatically collect eluent. The eluent is extracted with organic solvent, depressurized to be concentrated and dried under vacuum, and finally, the salvianolic acid B with purity higher than 98.0 percent is obtained. Compared with the prior art, the method is easy to operate, the cost is low, the repeatability is good, the efficiency is high, the product purity is high, and the method can be used for the mass production of the salvianolic acid B.

The invention provides a method for preparing total saponins of rhizoma cimicifugae through separation and purification by virtue of a micro emulsion-phase interface extraction technique. The method can achieve the purpose of realizing industrial mass production by virtue of the micro emulsion extraction technique, and the method can save time and reduce the use of an organic solvent; and in addition, the clinical efficacy of the total saponins of rhizoma cimicifugae prepared by the method is better than that of total saponins of rhizoma cimicifugae obtained by a conventional separation and purification method.

The invention relates to a method for separating and purifying an FMD inactivated virus antigen by applying a simulated flow bed, wherein the method comprises the following steps: balancing a chromatographic column of the simulated flow bed with a balanced buffer solution; loading an FMD inactivated virus antigen sample into the chromatographic column of the simulated flow bed, during sample loading, simultaneously carrying out antigen sample impurity cleaning and sample desorption elution as well as chromatographic filler cleaning and regeneration and balanced liquid balancing on the chromatographic column, and continuously desorbing and eluting the collected and purified sample in the process. The simulated flow bed is applied to separation and purification of the FMD inactivated virus antigen for the first time, the continuous saturated sample loading separation operation can be realized and the sample loading amount is greatly improved; moreover, through the continuous separation and purification via multiple monomer columns, the degree of continuity is high, the separation and purification time is greatly shortened, the preparation efficiency is improved and the operation costis reduced. Moreover, the rigid filler is selected specifically, the loading capacity of the filler namely the pressure resistance is greatly improved, the use amount of the chromatographic filler isreduced, and the service life of the chromatographic column in the simulated flow bed is prolonged.

The invention discloses a method for separating and purifying oligodendrocyte precursor cells. The method comprises: digesting cerebral cortex of neonatal rats and part of white matter with trypsin and DNA enzyme; blowing and beating the obtained product to be a single-cell suspension; inoculating the single-cell suspension into a culture flask coated with polylysine in advance by use of a mixed-cell culture medium; performing culture for 3 to 5 days; replacing the culture flask with an oligodendrocyte precursor cell proliferation culture medium when the fusion of bottom-layer cells reaches 65 to 75 percent; performing culture for 3 to 5 days; replacing the oligodendrocyte precursor cell proliferation culture medium with an oligodendrocyte precursor cell separation culture medium; digesting the obtained product at 37 DEG C; isolating oligodendrocyte precursor cells from mixed cells; blowing and beating the obtained product to be the single-cell suspension; inoculating the single-cell suspension into the culture flask coated with polylysine in advance by use of an oligodendrocyte precursor cell inoculation culture medium; replacing the culture flask with an oligodendrocyte precursor cell purification culture medium after the cells adhere to a wall; performing culture for 2 to 4 days; and obtaining adherence cells, namely the oligodendrocyte precursor cells. The method can obtain a large number of high-purity good-activity oligodendrocyte precursor cells conveniently, rapidly, economically and efficiently.

The invention discloses a separation and purification method of c-di-GMP (cyclic diguanylate), comprising the following steps of: directly sampling a c-di-GMP crude product solution on a fast protein liquid chromatography equipped with an ion exchange chromatographic column; carrying out gradient elution by using a buffer solution with pH of 8.0; carrying out detection under 254 nm by an ultraviolet detector; collecting an eluent in the peak position; confirming a structure by using a mass spectrum; and freeze-drying the eluent with target compounds, thereby obtaining the solid c-di-GMP. The c-di-GMP prepared according to the method provided by the invention has the purity of over 95% through reversed-phase high performance liquid chromatography detection, and realizes c-di-GMP separation and purification from the c-di-GMP crude product solution in one step; moreover, the method provided by the invention has simple technology, short period and nonuse of toxic organic solvents, and is a novel method with high efficiency, environment friendliness and suitability for industrialized production.

The invention provides a process method for separating and purifying maize pollen from maize anther. Maize male spikes (the male spikes are extracted and are close to dusting period) are extracted cross the ridge, and anther on the male spikes is rubbed down. The maize anther comprises two parts: pollen capsule walls and pollen wrapped thereby. The pollen and the pollen capsule walls are initially separated by water-soaking and filtering methods, the tissues of the filter residues (the pollen capsule wall) are titrated, and the titrated pollen capsule walls are further soaked in water and filtered so as to further separate the pollen from the pollen capsule walls. The filtrates of filtration twice are mixed together to obtain relatively pure pollen, and the filtrate is filtered, so that the effect of eliminating fine impurities and purifying the maize pollen can be achieved, and the filtrate is lyophilized to obtain pure maize pollen. The method is simple, feasible and high in efficiency, the nutrients of the maize pollen are not destroyed and the maize pollen is not damaged, and the method is suitable for scaled production.

The invention provides an industrial production process for fast separating and purifying ganglioside by using chromatography media having a special identification function. The process comprises three steps of static adsorption, elution, and concentration and drying, wherein the step of static adsorption comprises the steps of: adding extracting solution into animal brain tissue for homogenation, centrifugation and demixing, directly adding supernatant liquid subjected to the demixing into the chromatography media having a special identification function, stirring for absorption for 1 to 2 hours and fully stirring and mixing the chromatography media having the special identification function and the extracting solution; the step of elution comprises the step of directly adding the chromatography media having the special identification function and absorbing the ganglioside into elution liquid for elution for 1 to 2 hours; and the step of concentration and drying comprises the steps of: concentrating the elution liquid and then refrigerating and drying the concentrated elution liquid in the environment of -70 to 20 DEG C to obtain the ganglioside product. In the process, the chromatography media and the extracting solution are fully stirred and mixed by using the methods of static absorption and elution to minimize the loss of the ganglioside in the extracting process; compared with the conventional macroporous resin chromatography, the process has the advantages that: the yield is increased by 15 to 20 percent, the separation and purification time is shortened by 10 to 38 times; moreover, the process is simple to operate and favorable for industrial production.

The invention relates to a radial flow chromatographic separation and purification method for biological polysaccharide, which comprises the following steps of: centrifuging a medical fungi liquid fermentation product or a mycelium (fruiting body) enzymolysis product and collecting supernatant or collecting supernatant which comprises polysaccharide and is extracted from plants, animals, bacteriaand yeast; directly loading the supernatant on a macroporous resin radial chromatographic column of 500ml at the flow rate of 60 to 120ml per minute; eluting the macroporous resin radial chromatographic column by using distilled water or deionized water at the flow rate of 50 to 200ml per minute; and collecting 500 to 800ml of eluent, namely solution containing purified polysaccharide. The polysaccharide is directly separated and purified from the enzymolysis supernatant and the fermentation supernatant of the medical fungi mycelium and the supernatant extracted from the plants, animals, bacteria and yeast by a one-step method; and the biological polysaccharide separation and purification method has the advantages of simple process, convenient operation, no use of an organic solvent, highproduction efficiency and obvious purification effect.

The invention discloses a rapid separation and purification method of the water soluble peptide polysaccharide from Cordyceps Militaris and belongs to the extraction technology field of the bioactive substances. The method comprises drying and smashing the Cordyceps Militaris, obtaining the component CF1 by extracting the ultrapure water, obtaining the component CF1-1 by the separation from the molecular sieve, obtaining the component CF1-1-1 and CF1-1-2 by separation and purification from the ionic exchange column, and obtaining the CF1-1-1-1, CF1-1-2-1 and CF1-1-2-2 by separation from the affinity chromatography column. By adopting the purification method of smashing the Cordyceps Militaris and direct introduction of the water extract on column, the invention greatly promotes the efficiency and decreases the cost, in addition, the entire separation and purification process does not need the organic solvent, thereby really achieving the purpose of green, rapidness and high efficiencyof the separation of the polysaccharide. The method can be widely applied in the separation and purification technology of the water soluble peptide polysaccharide from the Cordyceps Militaris in thefactory and the laboratory.

The invention discloses a method for extracting, separating and purifying aconitum alkaloids, belonging to the technical field of alkaloid extraction. The raw material is root tuber containing aconitum alkaloids, crushed and sieved, extracted with acidified ethanol solution ultrasonically, deesterified and alkalized, and distilled under reduced pressure to remove the solvent to obtain crude alkaloids; then separated by high-speed countercurrent chromatography, and finally Aconitine, hypoaconitine, Neoaconitine and Dianaconitine. By adopting the preparation method disclosed by the invention, the separated product has high yield, high purity, short process, low cost and easy industrialization.