31 results about "Vitamin E product" patented technology

The invention discloses a method for extracting a natural vitamin E from blackberry seeds, which comprises the following steps of: (1) solvent extraction: drying the seeds, extracting by using a mixed liquor of normal hexane and petroleum ether and concentrating extracting liquor to obtain a crude fat extract; (2) urea clathration: dissolving urea by using 95% ethyl alcohol, adding the fat extract, thermally extracting, standing at 0-4 DEG C, filtering, obtaining upper filtrate and carrying out reduced pressure distillation to obtain an oil phase; (3) silica gel column chromatography: carrying out the silica gel column chromatography on the oil phase, collecting eluant which is mixed liquor of absolute ethyl alcohol and normal hexane and concentrating to obtain a vitamin E concentrated solution; and (4) decoloration: decoloring the vitamin E concentrated solution by using a mixture of 7% of active carbon and atlapulgite to finally obtain a natural vitamin E product. The content and the yield of the vitamin E in the product obtained by using the method can be up to 50%.

The new natural vitamin E extracting process has the technological steps of: esterification and separation of free fatty acid; saponification and esterification of pre-esterified oil; separation of sterol; separation of methyl fatty ester; and adsorbing separation. The present invention is suitable for the extraction of deodorized vegetable oil distillate with relatively low vitamin E content and preparation of natural vitamin E product with higher purity, and has high product yield and product purity over 95 %.

The invention relates to the fine chemistry industry synthesis field, and especially relates to an environmentally-friendly synthesis method of vitamin E. The method comprises the following steps: adding 150-200 parts by weight of toluene into a reaction device, sequentially adding 40 parts by weight of 2,3,5-trimethylquinhydrone and 40-80 parts by weight of isophytol under mechanical stirring, slowly adding 1.5-2.5 parts by weight of magnesium chloride and 0.8-1.2 parts by weight of a magnesium oxide supported silica catalyst after the above obtained reaction system is fully dissolved and clear, closing the reaction system, allowing the reaction system to undergo a reaction under a vacuum degree of -0.07 - -0.05MPa at a temperature of 55-65DEG C for 1.5-2.5h, and allowing toluene reflux to be maintained and generated water to be distilled out with the toluene reflux in the reaction to be in favor of the implementation of the reaction; and recovering the catalyst and the above solvent, and carrying out reduced pressure distillation of the solvent-distilled reaction system to obtain a required pale-yellow oily vitamin E product. The method has the advantages of repeated use of the supported catalyst, high yield, low energy consumption and environmental protection.

The invention relates to a preparation method of vitamin E. The vitamin E is prepared by reacting 2,3,5-trimethylhydroquinone and isophytol serving as starting raw materials in an organic solvent in the presence of Lewis acid, hydrochloric acid and a metal reducing agent. In the technical scheme of the invention, a small amount of metal reducing agent is added into a reaction system for serving as a protective agent to prevent a generated vitamin E product to be oxidized, so that the purity and yield of a target product are ensured. Moreover, the technical scheme of the invention has the advantages of readily-available raw materials, simple and convenient process, low reaction low consumption and easiness for operating, so that the overall cost is reduced, and the method is suitable for industrial mass production.

The invention discloses a method and a system for low-residual multi-stage stripping of a vitamin E by-product fatty acid solvent, and the method is as follows: distilling a deodorized distillate fromwhich sterol is removed to respectively obtain a distillate and a residual liquid; performing multi-stage stripping on the distillate, and evaporating a solvent to obtain a vitamin E product. The method has the advantages of extremely low residual capacity, low labor intensity, low environmental pollution, easy control of reaction, and high purity and high recovery rate of the vitamin E.

The present invention relates to the preparation process of high-content vitamin E through condensation of trimethyl hydroquinone and isophytol. In polar ester solvent and in the presence of zinc halide and strong acid, trimethyl hydroquinone and isophytol produce condensation reaction. The present invention features that during condensation reaction, co-catalyst in the amount of 0.1-2.0 wt% of isophytol is added to inhibit the generation of dl-alpha-tocopherol isomer. The present invention can produce vitamin E product with vitamin E content over 98 % for corresponding medicinal use.

The invention provides a decoloration and purification method for vitamin E. The method includes the following steps: (a) providing a composite decoloration agent to perform decoloration to a vitamin E product; (b) eluting the decolored vitamin E in the step (a) through column chromatography by means of an eluting agent, and collecting an eluent component; and (c) concentrating the eluent component in the step (b) to prepare the decolored and purified vitamin E. In the step (a), the composite decoloration agent includes activated clay, activated carbon, diatomite and magnesium silicate according to 100:50-100:30-70:10-50 by mass. The decoloration and purification method can shallow the color and reduce the viscosity of vitamin E, thereby improving flowability and also increasing the purity of the vitamin E. The vitamin E is low in loss and has a high recovery rate during the decoloration and purification.

The invention relates to reparation method of a fortified vitamin E-containing fresh cheese. The method comprises the following steps: 1, dissolving vitamin E and beta-whey protein in water, stirring with magnetic force so as to obtain a reaction solution, and dialyzing in a dialyzing bag so as to obtain a self-assembly beta-lacto globulin-fortified vitamin E product; 2, inoculating lactococcus in an M17 culture medium, carrying out continuous activation for three generations to obtain a bacterium solution, and inoculating the bacterium solution in a whey basal culture medium for culturing so as to obtain a fermentation agent; 3, mixing the self-assembly beta-lactoglobulin-fortified vitamin E product and fresh cow milk, adding calcium chloride, inoculating the fermentation agent, carrying out acid production, and curding so as to obtain the fortified vitamin E-containing fresh cheese. In the method, only beta-lactoglobulin serves as a carrier, no other coupling reagents, emulgators and organic solvents are added; on one hand, the food safety of the fortified vitamin E-containing fresh cheese is good, on the other hand, the edibleness and the utilization rate of the vitamin E are increased; the shelf life of the fresh cheese is prolonged.

The invention discloses a preparation technology for a natural vitamin E. The preparation technology comprises esterification, water washing, cold crystallization, solid-liquid separation, molecular distillation, column chromatography adsorption, and secondary molecular distillation and the like; according to the preparation technology for the natural vitamin E, the molecular distillation technology and the column chromatography technology are combined, so that the higher-purity natural vitamin E is prepared; the adsorption resin is a filling agent and used for purifying the natural vitamin E through column chromatography, the total content of the natural Vitamin E product prepared is 90% above, and the total yield is 80% above. Because the molecular distillation is performed for two times, by-products can be removed to the greatest extent, the natural vitamin E with good quality, more transparent color, qualified optical rotation, and high quality can be prepared; the process route has the characteristics that the steps are less, the yield is high, and the operation condition is mild; meanwhile, the process can be reduced greatly, the high-purity natural vitamin E can be obtained, the yield is higher, and the cost is reduced.

The invention provides a method for industrial extraction of natural vitamin E. The method is characterized by including the steps of: A. subjecting soybean oil leftover containing 4%-8% of natural vitamin E to vacuum deodorization dehydration treatment in a wiped-film evaporator; B. then adding a certain amount of ethanol into the treated oily matter for dissolution; C. then adding a catalytic amount of zinc chloride and a specified amount of tetrahydropyrane, and performing stirring at room temperature; D. filtering the precipitate; E. then dissolving the precipitate in ethanol; F. adding a catalytic amount of an organic weak acid water solution to carry out reaction at 45-55DEG C; G. at the end of the reaction, conducting filtering to remove sterol; and H. concentrating the mother liquor dry, thus obtaining natural vitamin E. The method provided by the invention can avoid multistage molecular rectification, and reduces the damage of long-time high temperature and high pressure on vitamin E. The natural vitamin E product extracted by the method provided by the invention has an effective content of greater than or equal to 50%. The employed solvent can be recycled and reused repeatedly. Being convenient and easy to operate, the method is suitable for industrialized production.

The invention relates to a method for extracting natural vitamin E from by-product residual oil, which comprises the following steps: contacting the by-product residual oil dissolved in an organic solvent with strongly basic anion exchange resin HZ-202, eluting the resin, collecting the eluted fraction, and drying to obtain the natural vitamin E, wherein the byproduct residual oil contains vitamin E succinate and/or vitamin E acetate. By adopting the method disclosed by the invention, not only is the natural vitamin E efficiently recovered, but also the natural vitamin E product with relatively high purity can be obtained, and in addition, the specific rotation of the obtained natural vitamin E product is obviously improved.

The invention relates to a method for removing zearalenone from natural vitamin E and a pure vitamin E product obtained by the method. The method for removing zearalenone comprises the steps of imino diacetic acid type chelate resin pretreatment, column packing, adsorption, leaching, separation and the like. The method for removing zearalenone is simple in process, does not introduce other substances, does not need other separation steps, and does not cause secondary pollution to the vitamin E product; and compared with adsorbents such as diatomite and montmorillonite, the adsorption efficiency of the method is about 80-90% higher, and the material loss is small.