63results about How to "Use less solvent" patented technology

The invention relates to a traditional Chinese medicine venenum bufonis extract. A method for extracting the extract includes steps of extracting traditional Chinese venenum bufonis medical materials at the temperature ranging from 60 DEG C to 90 DEG C by ethanol water with volume percent of 60-95% in a backflow manner, separating extract liquid via silicagel columns after the extract liquid is concentrated, adopting petroleum ether and acetone with volume ratio of 1-8:1 as eluant to realize gradient elution, collecting parts of eluent, and filtering, concentrating and drying the eluent in a pressure reduction manner to obtain the traditional Chinese medicine vanenum bufonis extract containing mixture of three types of bufotalin including resibufogenin, cinobufagin and bufalin, wherein the sum of the weight percentages (calculated when three types of the bufotalin are dried) of the three types of the bufotalin is higher than or equal to 95%. The invention further provides the preparation method for the traditional Chinese medicine venenum bufonis extract. The sum of the weight percentages of the three types of the bufotalin in the traditional Chinese medicine venenum bufonis extract is higher than 95%, extraction transfer rate is high, the quantity of used solvent is lower, residual solvent is little, pollution degree is lower, operation is simple and convenient, and industrial production is realized easily.

The invention discloses a preparation method for alkaloids by performing extraction on lindera glauca root and uses thereof. The preparation method comprises the following steps: 1) processing raw materials; 2) performing percolating extraction by using an acidic alcohol aqueous solution; 3) preparing a lindera-glauca-root total alkaloids extractive concentrate; 4) preparing an eluent; and 5)-8) preparing and purifying the compounds. By employing the acidic alcohol aqueous solution as the extraction solvent, the extraction solvent can be repeated recovered for utilization, and cost is saved. Percolating extraction is employed, the leachate can reach a relatively high concentration, and extraction efficiency can be improved. The method employs normal-temperature operation, does not need heating, the solvent usage amount is less, the filtration requirement is relatively low, the separation operation process is simplified, the extractive is less in impurities, extraction efficiency is high, and the solvent usage amount is less.