7 results about "Reflux extraction" patented technology

This utility model discloses a preparation device for total flavonoid extract from alfalfa, comprising: a pulverizing device, a hot reflux extraction device, a distillation device, a centrifuge, an extraction device, a first waste liquid tank, a first conditioning device, a resin adsorption device, and a second waste liquid tank. The first inlet of the distillation device is connected to the outlet of the hot reflux extraction device; the outlet of the distillation device is connected to the inlet of the centrifuge; the outlet of the centrifuge is connected to the inlet of the extraction device; the inlet of the first waste liquid tank is connected to the outlet of the extraction device; the inlet of the first conditioning device is connected to the outlet of the extraction device; the inlet of the resin adsorption device is connected to the outlet of the first conditioning device; the outlet of the resin adsorption device is connected to the third inlet of the distillation device; and the inlet of the second waste liquid tank is connected to the outlet of the resin adsorption device. This utility model can extract total flavonoid compounds from alfalfa with high extraction efficiency and good purification effect.

The invention provides a method and process for extracting total asiaticoside from centella asiatica, and relates to the technical field of organic chemical agent manufacturing, and the extraction method comprises the following steps: pretreating and crushing raw materials; performing water reflux extraction; adsorbing and purifying by using macroporous resin; carrying out alcohol precipitation impurity removal and concentration, controlling the evaporation temperature and the vacuum degree in the concentration process to adjust the feeding flow rate, so that the liquid medicine uniformly forms a film, and concentrating until the specific gravity of the liquid medicine is 1.2 to obtain thick paste; and closing the heating system after concentration is finished. According to the invention, the heat loss rate of asiaticoside can be reduced, the output is increased, and the circulation rate is increased through a condensation recovery system, so that the consumable cost and the equipment cost are effectively reduced, efficient and mild material treatment is realized through a falling film evaporation technology, and by utilizing the synergistic effect of film flow and vacuum low temperature, the product quality is improved. And the solvent is quickly removed within an extremely short heating time, so that the heat-sensitive asiaticoside is protected from being degraded and discolored to the greatest extent.

The invention discloses a method for extracting high-purity imperatorin from angelica dahurica, which comprises the following steps: compounding angelica dahurica medicinal materials, performing hot reflux circulating extraction, reducing the degree, performing graded elution, concentrating, scheduling, freezing to remove impurities, reducing the degree, performing secondary graded elution, crystallizing, recrystallizing and performing vacuum drying to obtain an imperatorin pure product with the purity higher than 99%. The used raw materials are wide in source and easy to obtain, the used extraction equipment is common, the cost of the extraction solvent is low, the purification process is convenient and fast, an organic solvent with strong volatility and irritation is not used, and a novel green and environment-friendly industrial production method is provided for preparing the high-purity imperatorin.

The invention relates to the technical field of traditional Chinese medicine detection, in particular to a detection method and identification application of a trogopterus dung medicinal material. The detection method comprises the following steps: adding an extraction solvent into a trogopterus dung medicinal material, mixing, carrying out hot reflux extraction on the obtained mixture, and filtering to obtain a test solution; the extraction solvent is alcohol; performing high performance liquid chromatography-mass spectrometry combined detection on the test solution, and determining the expression quantity of the marker; the marker comprises at least one of xanthine, tryptophan and 2, 4-dihydroxybenzoic acid. According to the detection method of the trogopterus dung medicinal material, the key markers in the trogopterus dung medicinal material can be detected, and the specification and authenticity of the trogopterus dung medicinal material can be accurately identified by measuring the expression quantity of the markers.

The utility model discloses an oil washing tower, and relates to the technical field of chemical equipment, the oil washing tower comprises a first cylinder, a second cylinder, a third cylinder, an upper seal head, a lower seal head, a gas-liquid contact tray assembly and a skirt support mechanism; a plurality of manholes and a plurality of first temperature detectors are uniformly arranged on the side walls of the first barrel, the second barrel and the third barrel from top to bottom; a tower top cold reflux inlet, a carbolic oil circulating gas phase return port and a carbolic oil fraction outlet are respectively formed in the side wall of the first barrel; a middle-section backflow inlet, a middle-section backflow extraction opening, a wash oil gas circulation return opening and a wash oil outlet are formed in the side wall of the second barrel, a feeding opening is formed in the side wall of the third barrel, and a waste liquid output opening is formed in the bottom of the lower sealing head; the gas-liquid contact tower tray assemblies are uniformly distributed in the first barrel, the second barrel and the third barrel. Through a segmented modular structure, multi-stage tray mass transfer, precise temperature control backflow and a circulation system, efficient separation and energy consumption optimization are realized.

The utility model discloses a purification treatment device for gas detection, which relates to the technical field of waste gas purification and comprises a treatment box and a gas detector fixedly embedded on the inner wall of the top surface of one side of the treatment box, the device further comprises an adjusting and closing unit arranged outside the treatment box, a filtering and purifying unit arranged on the adjusting and closing unit and a backflow pumping assembly arranged on the treatment box. The adjusting and sealing unit comprises a bearing box, a screw rod, a supporting block, an extension sleeve and a sealing supporting plate; the filtering and purifying unit comprises purifying filter cotton, a filter plate, a water tank, a water conveying pipe, a conveying pump and a spraying plate. According to the device, the lead screw is controlled to rotate forwards and backwards on the bearing box, one supporting block in threaded connection with the lead screw can drive the extension sleeve to ascend and descend on the bearing box to adjust the exposed area under the stress effect, and the closed supporting plate is driven by the extension sleeve to flexibly adjust the distance between the closed supporting plate and the treatment box. And the equipment is simple and labor-saving in overall maintenance and assembly of the purification filter.

The invention belongs to the technical field of extraction and purification of natural products, and provides a rapid preparation method of high-purity pedunculoside. Optimized ethanol reflux extraction is combined with a multi-step integrated purification process, and the method specifically comprises the steps of raw material pretreatment, ethanol water solution heating reflux extraction, filter residue repeated extraction, filtrate combination and vacuum concentration, distilled water dispersion and precipitation, activated carbon decoloration, petroleum ether deoiling, methanol water solution recrystallization and the like, and finally a high-purity pedunculoside product is obtained. The process is simple and efficient, avoids complex operation of traditional column chromatography purification, has the outstanding advantages of high product purity, short operation period, low solvent consumption, easiness in large-scale amplification and the like, and is suitable for industrial large-scale production.