32results about How to "Effective extraction and separation" patented technology

The invention discloses a method for extracting a-arbutin from fermentation liquor based on membrane separation technology. The method comprises the following steps: (1) microfiltering fermentation liquor; (2) adsorbing and desorbing microfiltrate; (3) concentrating and decolorating desorbed solution; and (4) concentrating and catalyzing the decolorated solution. The ceramic membrane separation technology is applied into the pretreatment of the a-arbutin fermentation liquor, and the method is simple and convenient to operate, high in safety coefficient, low in production cost, high in yield and good in purity and quality compared with the method of flocculating and extracting arbutin in the fermentation liquor with alcohol.

The invention relates to application of a cyclophane amide compound containing three central hydrogen bonds as an extracting agent in separation of rare-earth elements, wherein, the cyclophane amide compound containing the three central hydrogen bonds is applied to the separation of the rare-earth elements. The cyclophane amide extracting agent containing the three central hydrogen bonds has single composition, good chemical stability and less consumption; the extracting agent can carry out extraction in neutral solution; the dissolubility of the extracting agent in different solvents can be adjusted through an R group; and the extracting agent further has the advantages of fast extraction speed, fast phase separation speed and the like while extracting the rare-earth elements. Therefore,the cyclophane amide containing the three central hydrogen bonds is taken as a novel extracting agent for extracting and separating the rare-earth elements has practical application prospect.

The invention discloses a method for preparing high-purity annatto. The method comprises the following steps of: adding annatto seeds to an alcohol or acetone aqueous solution; stirring at 30-60 DEG C and separating solid and liquid to obtain an annatto extracting solution; enriching and desorbing the annatto extracting solution through absorption resin; and decompressing, concentrating, crystallizing and drying an obtained desorbing solution to obtain an annatto crystal. In the invention, because macroporous absorption resin is adopted to enrich the annatto, most high-polarity impurities canbe removed, therefore, the clarity and the quality of the extracting solution are improved; a discontinuous gradient desorbing method is adopted in the desorbing process, and a low-concentration alcohol sluicing resin column can be used for removing most polysaccharides and strong-polarity impurities adsorbed by the resin; and then the high-concentration alcohol is used for desorbing to ensure that the desorbing solution quality is greatly improved, which is beneficial to subsequent crystallization. An obtained product has high purity, wherein shown as detection, the content of HPLC (High Performance Liquid Chromatography) is larger than 95 percent, and the yield reaches higher than 80 percent, thus the invention provides a safer technical guarantee for producing officinal grade raw materials, has low extracting cost and is suitable for industrial production.