35results about How to "Achieve extraction" patented technology

The invention discloses a composite material based on a heteroporous covalent organic framework and its preparation method and application. The invention adopts the method of step-by-step addition of monomers, and first covalently bonds p-phenylene on the surface of polymer microspheres. Amine and 1,3,5-three (4-aminophenyl) benzene, it is easier to control the growth of the covalent organic framework and the morphology of the final product; the present invention adds two kinds of amine compounds in the reaction, respectively for Phenylenediamine and 1,3,5-tri(4-aminophenyl)benzene finally generate heteroporous covalent organic frameworks with different pore sizes, which can realize the extraction of a variety of compounds with different molecular sizes. The composite material prepared by the invention can be used for extraction and elimination, and can be used for liquid chromatography columns to separate various compounds.

The invention provides a method used for processing high temperature coal tar. The method comprises following steps: high temperature coal tar is mixed with solvent naphtha, an obtained mixture is delivered into a demetalization reactor, the mixture is reacted with a filling material, an obtained effluent is delivered into a water washing tower to contact with fresh water, an obtained mixed material is delivered into a dehydrating tower, metal-free high temperature coal tar and water are obtained via separation, the metal-free high temperature coal tar is delivered into a boiling-bed reactor for hydrogenation reaction, an obtained reaction effluent is subjected to flash evaporation dehydration fractionation so as to obtain a light fraction and a heavy fraction, the light fraction is delivered into a fixed bed reactor for hydrogenation reaction, an obtained reaction product is subjected to separation so as to obtain gas, naphtha, and diesel oil, all of the heavy fraction is recycled back to the boiling-bed reactor for circular process, or a part of the heavy fraction is recycled back to the boiling-bed reactor, and the rest heavy fraction is discharged. The method is capable of removing metal in high temperature coal tar at mild conditions, and delaying metal inactivation of catalysts in hydrogenation reactors and increasing of bed pressure drop.

The invention discloses a coal flow balance self-adaptive control method based on rough sets, which collects coal flow state information data according to the set time, takes the coal flow state information as the input of the control system, and firstly analyzes the coal flow state information Carry out data preprocessing, then analyze and determine the conditional attributes and decision-making attributes that affect the adaptive control of coal flow balance, use the rough set theory method to reduce the conditional attributes, and extract the shearer from the reduced attribute set Finally, the random forest algorithm is used to extract the rules to form an effective coal flow balance adaptive control rule library to realize the coal flow balance adaptive control.

The invention provides a bergamot flavonoid extract and a separation and purification method thereof. The invention uses bergamot powder as a raw material, adopts continuous phase change extraction equipment to obtain bergamot flavonoid crude extract, and then adopts polyamide column chromatography to separate and purify the bergamot flavonoid crude extract to obtain bergamot flavonoid extract. The method can efficiently enrich and purify flavonoids, the total flavonoid content in the obtained 30% ethanol eluted fraction is >80%, and the total flavonoid content in the 60% ethanol eluted fraction is >50%, and the obtained flavonoid extract is rich in components, Rich in eriocitrin, hesperidin, rutin naringin, diosmin, narcissin, kaempferol‑3‑O‑rutinoside, and rutin. The invention provides an efficient, green and environment-friendly method capable of effectively retaining and enriching the functional components of the flavonoid extract, and provides a new way for the comprehensive utilization of bergamot.

The invention discloses a dispersed solid phase extraction material and its preparation method and application, belonging to the technical field of aflatoxin detection in edible oil. The preparation method of the dispersed solid phase extraction material comprises the following steps: weighing humic acid, washing with ultrasonic waves 12‑18min, after washing with water, centrifuge to take the solid precipitate, disperse it in acetone, heat and evaporate until the acetone is completely evaporated, and obtain a residue; take the residue, put it in a Soxhlet extractor, add 180mL of cleaning solution, and heat and reflux to wash until After the reflux liquid is clear and colorless, stop heating; take out the cleaned material, dry the material at 100°C for 1.5-2.5h, cool it for 0.5-1h, and then pass through a 120-mesh sieve, take the under-sieved material, and obtain the dispersed solid phase extraction material. The preparation method of the present invention is applicable to most humic acids currently on sale, and the preparation method has simple process, is beneficial to control, and the properties of the dispersed solid-phase extraction material after cleaning and preparation are stable.

The invention provides a kind of feed-limited chromatographic filler and its preparation method and its stationary phase and its application. The preparation method comprises the following steps: (1) making a negatively charged porous material and a positively charged polymer The microspheres react to obtain a porous material with polymer microspheres adsorbed on the surface; (2) introducing functional groups into the internal pores of the porous material obtained in step (1) to obtain a porous material with functional groups; (3) Under the premise of not destroying the functional groups in the pores of the porous material, remove the polymer microspheres adsorbed on the surface of the porous material; (4) chemically modify the outer surface of the porous material obtained in step (3) to make the outer surface hydrophilic , to obtain the restricted-advance chromatographic filler. The feed-limited chromatographic filler provided by the invention has a high exclusion rate for proteins, and shows strong retention and separation capabilities for small molecular substances.