1019results about How to "Reduce extraction costs" patented technology

The invention discloses a method for extracting industrial hemp oil rich in cannabidiol. The method includes the steps that supercritical carbon dioxide fluid is adopted for extracting industrial hemp oil from industrial hemp, during extraction, cooled industrial hemp powder is placed in a material barrel of an extraction kettle, CO2 gas is injected into the extraction kettle, the temperature and pressure in the extraction kettle are kept, the CO2 gas makes contact with raw materials in a supercritical state, the industrial hemp oil and other ingredients in the industrial hemp powder are dissolved in the supercritical fluid, the fluid containing cannabidiol and other ingredients throttles and expands in the extraction kettle and enters a separation kettle to be analyzed, and the industrial hemp oil is obtained and collected. The CO2 fluid in the supercritical state is used as an extraction solvent, reuse is achieved in the same system, the process is simple, energy consumption is low, the extraction period is short, is only 1-2 h and is 1/4 of the production period in the prior art, and the extracted industrial hemp oil has the advantages of being good in quality, high in purity, free of abnormal smells, solvent residues and environmental pollution and the like.

The invention discloses a process for extracting and refining fatty acid rich in DHA from Cryptidinosa. The process first flocculates the fermentation broth of Crypthecodinium cohnii and then separates the solid from the liquid. After breaking the wall with alkali, the cells are mechanically broken, and then the broken bacteria are extracted with an organic solvent to obtain DHA crude oil; the DHA crude oil is passed through DHA essential oil is obtained after degumming, alkali refining, decolorization and deodorization. The method is simple to operate and can reduce the cost of extracting DHA oil. Only organic solvents are used in the operation process, and there is no residue in the end. After refining, the quality of DHA oil is improved. The DHA content in the extract is about 40-50%, which is suitable for DHA Large-scale production.

The invention relates to a coal seam pre-splitting method based on gas extraction, which adopts a 'CO2 gas extraction device' as a tool to blast and pre-split a pre-mined coal seam, so as to increase the crack of the coal seam, drive out gas absorbed on the coal seam and extract the gas. The method particularly comprises the following steps: drilling a hole on the working surface of a pre-mined coal seam, filling CO2 gas extraction device into the drilled hole, sealing the drilled hole, detonating the CO2 gas extraction device, releasing high-pressure CO2 gas for deep-hole impact and pre-splitting of the coal seam, taking out the CO2 gas extraction device, and connecting the drilled hole with a gas extraction system to extract gas. The pre-splitting method of the invention can greatly enhance the permeability of the coal seam, promote the gas dissociation in the coal seam, and improve the underground gas extraction efficiency of the coal mine.

The invention discloses a PDF form extraction method. According to the technical scheme, the method comprises the steps of analyzing a PDF document by a page number to obtain all image data, first line data and character data, processing the image data in sequence according to the page number by adopting an image identification algorithm, and obtaining second line data corresponding to form data from the image data with the form data; processing the first line data and the second line data in sequence according to the page number by adopting a graphic algorithm, thereby obtaining form frame data with form row data and column data; performing clustering processing on the character data by adopting a clustering algorithm to obtain text data with a character string set; and obtaining all the form data in the PDF document through final all form frames and all text data. According to the method for extracting forms in the PDF document, the accuracy and efficiency of extracting the forms in the PDF document are improved, and more accurate form data can be obtained; and the method is suitable for the field with higher requirements on the accuracy and efficiency of extracting the form data.

The invention discloses a depressurized extraction method for cutting through a roof or a floor of a coal seam by an abrasive water jet, which comprises the following steps: a. drilling a bedding drill hole to set depth on the roof or the floor of a coal-rock mass or a hard layer by using a drilling machine through a drill stem and a slotting drill bit; b. delivering a high-pressure abrasive water jet of which the pressure is 25-30MPa to the slotting drill bit through the drill stem, wherein the drill stem rotates in situ; forming a radial slit on the hole wall of the bedding drill hole, wherein the slit penetrates the roof or the floor of the coal-rock mass or the hard layer and a soft layer; c. enabling the drill stem to rapidly retreat for 1.5-3m so as to form a new slit; d. repeating the step c until a plurality of radial slits are formed on the bedding drill hole, and moreover, reserving a safety rock pillar of at least 5m at the slit located at the position of the orifice of the bedding drill hole at a certain distance from the orifice; e. retreating the drill stem and the slotting drill bit and sealing the hole; and f. extracting gas by a gas extraction system. The depressurized extraction method for cutting through the roof or the floor of the coal seam by the abrasive water jet has the beneficial effects that the drill hole does not have potential safety hazards and is easy to form; a hole sealing effect is good; the time of reaching the standards of extraction is short; the production efficiency is high; and the extraction is safe.

A set of documents is filtered for entity extraction. A list of entity strings is received. A set of token sets that covers the entity strings in the list is determined. An inverted index generated on a first set of documents is queried using the set of token sets to determine a set of document identifiers for a subset of the documents in the first set. A second set of documents identified by the set of document identifiers is retrieved from the first set of documents. The second set of documents is filtered to include one or more documents of the second set that each includes a match with at least one entity string of the list of entity strings. Entity recognition may be performed on the filtered second set of documents.

The invention discloses a technological process for preparing stevioside from stevia rebaudiana bertoni. The technological process comprises the following steps: carrying out countercurrent extraction on the dried stevia rebaudiana bertoni raw material with water, sequentially adsorbing the obtained extracting solution with macroporous absorption resin columns which are connected in series, allowing the residual liquid after absorption to enter a countercurrent extraction device for cyclic extraction, reabsorbing the obtained extracting solution with the resin columns which are connected in series once again, and completing the extraction separation closed cycle process; after the whole countercurrent extraction and absorption process is completed, eluting the resin columns with water for removing impurities, desorbing with stripping liquid, collecting the stripping liquid, concentrating and drying to obtain the crude extract of the stevioside; and refining the crude extract by a solvent method and decolorizing resin respectively to finally obtain the stevioside product. In the obtained product, the content of the stevioside compound is 70-100%, wherein, two components such as the stevioside and rebaudioside account for 70-90% of the whole stevioside compound, thus meeting the standards for a medicine, a healthcare product or food.

The invention belongs to the technical field of agricultural machinery and relates to a movable wholly-feeding banana stem comprehensive utilizing machine. A feeding device, a water squeezing device and a fiber scraping device are sequentially disposed on the upper layer of a rack from front to rear, a recycling device is disposed on the rear portion of the rack, and a discharging device is disposed on the middle layer of the rack. Driven by a power device, banana stems sequentially pass the feeding device, the water squeezing device and the fiber scraping device for water squeezing, fiber scraping and separating of scraping residues, the recycling device recycles the scraping residues and a small amount of thrown-out fibers, and the discharging device conveys extracted fibers out. The banana stems are treated by adopting five processes including whole feeding, rolling water squeezing, fiber scraping, recycling and discharging as well as conveying, so that comprehensive utilizing of the banana stems is realized. The machine is high in fiber extraction efficiency, capable of recycling the scraping residues and suitable for comprehensively utilizing the banana stems in main banana producing areas and promoting income increasing of banana growers.

The invention provides a technology for producing high-purity humate by using coal. The technology comprises the following steps: selecting weathered coal or lignitic coal or peat with humate content of not less than 40%, removing impurities, crushing into coal powder with 80-120 meshes, and adding 100-120kg of the coal powder and 120-200kg of nitric acid solution with concentration of 1.0-2.0% to a reaction kettle at the same time; heating at the temperature of 70-80 DEG C, reacting for 1 hour while stirring, controlling the PH value at 1.5-4, and keeping standing for cooling; performing high-speed centrifugal separation at centrifugal speed of 3000RPM, adding 10-12kg of precipitate to another reaction kettle, adding water which is as 2-5 times as weight of the precipitate and 0.3-0.6kg of sodium carbonate, stirring, and reacting at the temperature of 80-95 DEG C for 90 minutes; keeping the temperature unchanged, adding 0.5-0.9kg of sodium hydroxide or potassium hydroxide, and continuously reacting for 1 hour; and taking reaction solution after cooling and precipitation, centrifuging to remove precipitate, and drying the obtained solution to obtain the finished product, wherein, the PH value of the solution is 9-11. The technology has the advantages of simple and practical process, no environmental pollution, low extraction cost, fast extraction speed and high extraction rate.

The invention provides a method for producing fertilizer from base waste liquid. The method comprises the following processes: collecting soluble-base-containing wastewater generated in a base factory or saline solution electrolysis process, airing and concentrating to obtain base waste liquid with a base concentration of 18-22%; processing weathered coal or lignite or peat into coal powder by using a pulverizer, mixing the coal powder and the base waste liquid according to a weight ratio of 1:(8-10) and adding the mixture to a reaction kettle, uniformly stirring, heating, standing and precipitating, and thus obtaining the reaction precipitate and reaction supernatant after the reaction materials in the reaction kettle are still and precipitate; adding hydrochloric acid solution to the reaction supernatant, and drying the supernatant precipitate to obtain humic acid; and placing the reaction precipitate to a precipitating pond, uniformly mixing the reaction precipitate and humic acid according to a weight ratio of reaction precipitate to humic acid being 1:(0.5-0.8), standing for 2-3 hours, and spraying and granulating the mixed material to obtain a finished product used as fertilizer. The method has the advantages that wastewater can be recycled, environmental pollution is avoided, the process is simple and practical, the extraction cost is low, therefore, the method can be popularized and used.

The invention discloses a method for extracting europium oxide and yttrium oxide from waste fluorescent powder, which mainly comprises the following seven steps: sodium carbonate roasting, chlorination leaching, phosphate precipitation, precipitation conversion, yttrium extraction separation, high-purity yttrium oxide extraction and high-purity europium oxide extraction, wherein the yttrium extraction separation is performed through a P507 extraction separation method to realize simplified efficient continuous separation of rare earth yttrium and europium, and the method is high in separation efficiency and low in cost. Compared with the prior art, the method has the advantages of short process flow, high rare earth element extraction rate, high rare earth product purity, low extraction cost and the like.

Firstly, cleaning purple sweet potato and pulverizing it, using 4-5% citric acid aqueous solution (weight percentage) to extract it according to the ratio of 1:3-1:4, extracting for 3-4 hr. at 50-60 deg.C, filtering, making secondary extraction of the filter residue with 4-5 % citric and aqueous solution, removing filter residue, combining two filtrates, removing precipitate impurity insoluble incold water, vacuum reduced pressure concentrating to obtain liquid product, also can adopt macroporous adsorption resin to make separation and purification, refining and washing out impurity, using 40%-60% ethyl alcohol to strip and elute the colouring matter liquor, vacuum reduced pressure concentrating and spray-drying said colouring matter liquor at 65-75 deg.C so as to obtain the invented product.

The invention relates to a method for extracting paclitaxel from taxus chinensis branches and leaves, and the method comprises the following steps of: (1) soaking 1000 kg of pulverized taxus chinensis branches and leaves by using 5 m<3> of methanol, and filtering; (2) decoloring filter liquor; (3) decompressing and concentrating a decolored solution, and extracting; (4) degreasing and dewaxing extract liquor, crystallizing, depositing, filtering, and drying to obtain a primary product; (5) removing impurities contained in the primary product in a silicagel column, carrying out gradient elution, collecting paclitaxel-containing elution flows, and decompressing and concentrating to obtain a crude product; (6) stirring the crude product into silica gel, packing, carrying out gradient elution, collecting the paclitaxel-containing elution flows, and decompressing and concentrating to obtain a semi-finished product; (7) dissolving the semi-finished product, adding petroleum ether, standing, filtering, and drying to obtain a semi-finished product with the content more than or equal to 30%; (8) removing the impurities contained in the semi-finished product obtained from the step (7) in a silicagel column, carrying out gradient elution, collecting the paclitaxel-containing elution flows, and decompressing and concentrating to obtain a semi-finished product with the content more than or equal to 95%; and (9) dissolving the semi-finished product obtained from the step (8), filtering, adding normal hexane, standing, carrying out suction filtration; and drying to obtain a finished product with the content more than or equal to 99%.

The invention discloses a method for fast extracting gas on a coalface. The method includes that a bottom extraction roadway with the distance to a coal seam no smaller than 5 m is tunneled on a coal seam floor; a plurality of fracture drill holes extending into the coal seam are formed in the bottom extraction roadway, the center distance between every two adjacent fracture drill holes in the position entering the coal seam is between 30 m and 50 m, and the depth of the fracture drill holes in the rock stratum is not smaller than 10 m; the fracture drill holes are sealed according to fracture sealing requirements, and the coal seam is hydraulically fractured; the fracture drill holes are connected with an underground gas extraction system of a coal mine, and then coal seam gas can be extracted; a plurality of extraction holes extending into the coal seam are formed in the bottom extraction roadway, and the center distance from any extraction hole to the adjacent extraction holes or the position for the corresponding fracture drill hole to enter the coal seam is between 5 m and 8 m; the extraction holes are sealed according to extraction sealing requirements; coal seam gas is extracted through the extraction holes till the coal seam gas content reaches the standard. The method for fast extracting gas on the coalface has the advantages of having fewer drill holes and being high in extraction efficiency and coal mining efficiency, and roadway tunneling and coal mining work can be performed safely.

The invention provides a method for extracting curcumin from turmeric. The method comprises the following steps: weighing a certain amount of turmeric powder, adding 70-85% acetone according to the liquid-solid ratio of 1: 8-10, extracting for three times, decompressing and recovering acetone to obtain a dark brown oily extract, carrying out liquid-liquid extraction by the use of petroleum ether, water and ethyl acetate, carrying out crude separation, crystallizing and recrystallizing by the use of ethanol-water to obtain needle curcumin crystal, and measuring mass fraction by HPLC. Through calculation, purity detected by HPLC after crystallization can reach 88% and above, and purity detected by HPLC after recrystallization can reach 95% and above.

The invention discloses a method for preparing stevioside and chlorogenic acid from stevia step by step. The method comprises the following steps of: (1) soaking the stevia with cold water and extracting to obtain extract; (2) adding a bivalent iron salt into the extract to regulate pH value, flocculating, and filtering the flocculation solution to obtain filtrate and a filter cake; (3) adsorbing the filtrate by using macroporous adsorption resin, desorbing and refining to obtain the stevioside; (4) dissolving the filter cakes with water, regulating the pH value to be 0.5-5.5 by using acid, and filtering to obtain the chlorogenic acid filtrate; and (5) adsorbing the chlorogenic acid filtrate by using macroporous adsorption resin, desorbing, concentrating, drying, and re-crystallizing, thus obtaining chlorogenic acid. According to the method, the stevioside and the chlorogenic acid are extracted at the same time, so that a product is added, and the extraction cost of the stevioside is reduced; and the method is easy to operate, low in cost, high in chlorogenic acid yield, water-saving, environment-friendly, simple in equipment, high in utilization rate of raw materials and equipment and suitable for industrialized production.

The invention discloses a recovering method for molybdenum and copper in tungsten smelting molybdenum removing slag. The recovering method comprises the following steps: after mixing the molybdenum removing slag and quicklime, feeding the mixture into a resistance furnace for carrying out calcination, ball-milling calcined clinker until a certain granularity is reached, then leaching with dilute sulfuric acid, filtering to obtain filter residues which mainly comprise calcium sulfate and obtain a leaching solution which is an acid solution containing molybdenum and copper, carrying out mixed extraction with a mixed extractant containing N235 and TBP to obtain a water phase which mainly comprises a copper sulfate solution and can be used for a molybdenum removing procedure, reversely extracting an obtained organic phase with ammonia water after washing with dilute sulfuric acid to obtain a water phase which mainly comprises an ammonium molybdate solution, carrying out evaporation crystallization to obtain an ammonium paramolybdate product, wherein the obtained organic phase can be returned to the extraction procedure to be cyclically used. The recovering method has the advantages that the impurity removing effect is great, the product purity is high, the molybdenum and copper yields reach 98% above, obtained side products can also be cyclically utilized, no pollution is generated, the recovering cost is greatly reduced, and the comprehensive economical benefit is improved.