56results about How to "Reduce purification" patented technology

The present invention relates to a method for producing optically active IHOG, which can in turn be used for the production of monatin. The present invention further relates to a method for producing optically active monatin, and aldolase used for these methods. As such, the present invention enables the synthesis of 4-(Indole-3-ylmethyl)-4-hydroxy-2-oxoglutaric acid with high optical purity, which is useful as an intermediate in the synthesis of optically active monatin, from indole pyruvic acid and pyruvic acid (or oxaloacetic acid).

The present invention relates to compounds of general formula (I) for chromatographic separation of rare earth elements and / or s-, p-, d- metals, as well as to the method of the separation of rare earth elements.

The invention relates to a synthetic method of indanone substances, and particularly relates to a method for preparing 2,3-dihydro-1-indanone and a derivative thereof. The method comprises the following steps of: mixing benzene substituendum of which the structure is shown in a formula (I) with AlCl3 / NaCl, dropwise adding 3-chloropropionylchloride under agitation, and reacting to prepare the 2,3-dihydro-1-indanone and the derivative thereof in one step, wherein R1 and R2 are H atoms, halogen atoms, C1-C10 alkyl, methoxyl, ethyoxyl or amino; dropwise adding 3-chloropropionylchloride at 0-40 DEG C, wherein the control temperature is 0-60 DEG C and the retention time is 0.5-3hours; carrying out Fuke acylation reaction, heating to 150-200 DEG C to keep for 0.5-4hours; and carrying out cyclization reaction, and hydrolyzing cyclization reaction products, wherein the hydrolysis temperature is 50-100 DEG C. Two steps of reaction are merged into a one-pot method. Thus, purifying, drying and packaging of a midbody are reduced; the allergy possibility is avoided; the usage amount of a catalyst is reduced; and the production cost is reduced, and the environmental pollution is also reduced.

The invention relates to a process for producing lotus seed spirit. The process comprises the following steps of: selecting and crushing lotus seeds, moistening and stewing the crushed lotus seeds at the high temperature, adding water into the lotus seeds, spreading the lotus seeds to be cool, adding yeast into the lotus seeds, feeding the lotus seeds into a cylinder to perform large dreg fermentation, discharging fermented grains from the cylinder, distilling the lotus seeds to obtain first dreg spirit and rest secondary dreg yeast, and adding a stirring material into the secondary dreg yeast in a ratio of 1: 0.4-0.6, wherein the stirring material is prepared after the lotus seeds are selected, crushed, moistened at the high temperature and stewed; adding water into the lotus seeds again, spreading the lotus seeds to be cool, adding yeast into the lotus seeds, feeding the lotus seeds into the cylinder to perform secondary dreg fermentation, discharging the fermented grains from the cylinder, and distilling the lotus seeds to obtain secondary dreg spirit or rest third dreg yeast; adding water into the lotus seeds again, spreading the lotus seeds to be cool, adding yeast into the lotus seeds, feeding the lotus seeds into the cylinder to perform third dreg fermentation, discharging the fermented grains from the cylinder, and distilling the lotus seeds to obtain third dreg spirit; and blending the first dreg spirit and the second dreg spirit, or blending the first dreg spirit, the second dreg spirit and the third dreg spirit, and putting the blended spirit into storage and ageing the spirit. Therefore, the process can effectively control the acidity during fermentation, reasonably increase the activity of enzyme, reduce purification, effectively inhibit impurity bacteria, improve the content of ethyl acetate and ethyl caproate in the spirit, reduce the methanol in the spirit, enrich the mouthfeel, and keep the fragrance of the sprit thick.