40results about How to "Little impact on yield" patented technology

A process for preparing the clean diesel oil by hydromodifying, isomerizing and lowering pour point features that the fractional oil raw material and H2 pass through a catalyst bed to obtain clean high-quality diesel and the naphtha product with low contents of sulfur and nitrogen and high content of arylhydrocarbon. Said catalyst bed contains hydrocatalyst bed containing beta zeolite (0.5-20 wt.%).

The invention discloses a rice diseases and pests monitoring system. The system comprises a target image acquisition module, the target image acquisition module is used for acquiring images of to-be-monitored rice through an unmanned aerial vehicle module and sending the acquired image data to a remote control terminal in real time through a wireless communication module; the remote control terminal is internally provided with a diseases and pests identification module, and the diseases and pests identification module is used for respectively performing image denoising and image enhancement preprocessing through bilateral filtering and segmental linear transformation algorithm, performing image binarization processing through an iterative adaptive threshold segmentation method, then identifying holes, spots and pests trails on leaves and rootstocks of the rice based on length-width ratio of a connected component circumscribed rectangle, and consequently completing identification of diseases and pests based on a diseases and pests database according to an identification result. The rice diseases and pests monitoring system provided by the invention realizes real-time acquisition ofrice images, the system has a diseases and pests identification and analysis function, and consequently, real-time monitoring for the rice diseases and pests in each area is realized, and the system has high monitoring accuracy and good effect.

The invention relates to a formula of water dispersing compounding sand consolidation agent. It is made up from modified phenol-formaldehyde resin 5-8%, organic silicon resin 0.02-0.25%, furfural compounding 5-15%, alcohol compounding 0.5-5%, phosphoric acid series compounding 0.05-0.15% and water 89.43-81.6%. The benefit is that the sand consolidation agent has low viscosity, low usage quantity, low cost, etc.

The present invention relates to the preparation process and is especially the preparation process of powdered soybean phosphatide. The preparation process includes the steps of: mixing concentrated soybean phosphatide material with acetone of 2-30 times volume and the first homogeneous extraction to make soybean phosphatide dissolve in the solvent; solid-liquid separation to make liquid phase enter mixed oil tank and solid phase phosphatide second extracted; extraction in the second extractor with acetone; the second separation of mixed liquid after the second extraction in centrifuge; powdering solid soybean phosphatide; vacuum heating to dry soybean phosphatide; and recovering mixed oil in mixed oil tank. The present invention is used in producing high-quality medical soybean phosphatide.

The invention discloses a method for removing ginkgolic acid in a ginkgo biloba extract. The method comprises the following steps: firstly detecting the content of ginkgolic acid in the ginkgo biloba extract; then adding water into the ginkgo biloba extract; fully stirring and dissolving; adding a non-toxic alkaline substance to adjust the pH to 7-10; then adding a surfactant; after uniformly mixing, adding the obtained raw material liquid into a foam separator; continuously blowing air from the bottom of the foam separator to form foam; collecting foam discharged from the top end of the foam separator till no foam is generated, wherein the obtained foam liquid is a solution containing the ginkgolic acid and the residual foam-free solution in the foam separator is a solution without the ginkgolic acid; and concentrating and drying the solution without the ginkgolic acid to obtain the ginkgo biloba extract without the ginkgolic acid, wherein the surfactant is a polyhydric alcohol surfactant. The method disclosed by the invention is simple to operate, high in ginkgolic acid removal rate and low in operating cost, and the content of th ginkgolic acid in the ginkgo biloba extract finally obtained is reduced to below 5ppm.

This invention discloses a method for producing high-quality diesel oil from whole fraction oil of coking. The method comprises: separating whole fraction oil of coking into light fraction oil (containing part of light diesel oil fraction) and heavy fraction oil (containing heavy diesel oil fraction), hydrogenation-modifying the heavy fraction oil in the presence of beta-zeolite-containing hydrogenation catalyst, hydrogenation-refining the light fraction oil, and fractionating the effluent. The method can obtain high-quality cloean diesel oil and high-quality naphtha, and has such advantages as simple process and low energy consumption.

The invention provides a preparation method of ergosterol, which comprises the following steps: carrying out ultrasonic treatment, saponification and column chromatography purification on a strain, and recrystallizing twice to obtain the ergosterol product. The extraction rate of ergosterol can reach 1.63%, the purity is highe r than 99%, and the content is higher than 95%. According to the method, the advantages of ultrasonic wall breaking and saponification extraction are combined, the two operations are innovatively carried out step by step, and the extraction rate is greatly increased. Inaddition, tests find that in the purification process, recrystallization is carried out twice after column chromatography is finished, and the product purity is the highest and is remarkably superiorto that of one or three times of recrystallization. According to the whole ergosterol preparation method, most of the used solvents can be recycled, the production conditions are mild, batch production is easy to realize in factories, the cost is low, the efficiency is high, and the product is high in quality.

The invention relates to a preparation technology of 2,2-methylbutanoic acid, and relates to the field of chemical reagent synthesis. The preparation technology of 2,2-methylbutanoic acid includes thesteps that tertiary pentyl magnesyl Grignard reagent and carbon dioxide are subjected to an addition reaction, then hydrolysis is conducted, and finally the 2,2-methylbutanoic acid is obtained; the tertiary pentyl magnesyl Grignard reagent and carbon dioxide are subjected to a carbonyl addition reaction, the preparation technology is easy to operate, raw materials are easy to obtain, the yield ishigh, meanwhile, the prepared product is easy to purify and can reach 99% after purification, and application prospects are good.

The invention relates to the field of agriculture, the invention particularly relates to a red date disease and pest prediction system based on the Internet of Things. The system comprises an image acquisition module and a disease and pest prediction APP which realizes wireless communication with the image acquisition module and is internally loaded in a mobile terminal. The image acquisition module is used for acquiring an image of a to-be-detected red date tree at a fixed point through the unmanned aerial vehicle and sending acquired image data to the disease and pest prediction APP in realtime through the wireless communication module; and the disease and pest prediction APP is used for realizing planning of an image acquisition track and an image acquisition coordinate point of the unmanned aerial vehicle, realizing identification of disease and pest information carried in the detected red date tree image, and outputting a corresponding red date disease and pest prediction reportbased on an identification result. According to the invention, automatic identification, statistical analysis and prediction of red date tree diseases and pests are realized.

The invention provides a post-treatment method for preparing 1,3-dimethyl-4-iminourazine, belonging to the technical field of chemical processes. The method comprises the following steps: adding dimethyl cyanoacetylurea into a cyclization reaction tank, and adding liquid sodium hydroxide for a cyclization reaction; carrying out a heat-preserved reaction at a final temperature to obtain a crude 1,3-dimethyl-4-iminourazine product; carrying out centrifugal separation on the crude 1,3-dimethyl-4-iminourazine product to obtain a 1,3-dimethyl-4-iminourazine mother solution and a 1,3-dimethyl-4-iminourazine solid; and carrying out sewage treatment on the 1,3-dimethyl-4-iminourazine mother solution obtained in the step 3, putting the 1,3-dimethyl-4-iminourazine solid into a transfer tank, addingdrinking water to a constant volume, and carrying out beating and mixing to form a turbid liquid. The total impurity content of a finished caffeine product obtained by the treatment method is greatlyreduced, and the variety of impurities is greatly reduced.

The invention discloses a production system and production method of a passivated pure calcium core-spun yarn, belonging to the technical field of steelmaking furnace external refining. The production system comprises a heater, an extruding machine, a core-spun yarn unit, a passivating treatment device and an automatic charging mechanism, wherein the automatic charging mechanism comprises a pressure sensor, a solenoid valve, a passivated liquid pump and a control unit; a liquid outlet of the passivated liquid pump is connected with a liquid inlet on the upper part of the passivating treatment device through a liquid delivery pipeline; the liquid delivery pipeline is provided with a solenoid valve; the pressure sensor is installed at the liquid inlet on the upper part of the passivating treatment device; a signal output end of the pressure sensor is connected with an input end of the control unit; a switch of the passivated liquid pump is connected with an output end of the control unit; and the liquid inlet of the passivated liquid pump is connected with a passivated liquid storage tank through a pipeline. By using the passivated pure calcium core-spun yarn, the oxidation loss of calcium lines is reduced, so that the calcium yield in the molten steel is greatly enhanced.

The invention discloses a key exchange domain for controlling lipid chain length change of lipopeptide. The key exchange domain is a Cs-AL domain after exchange of a Cs-AL domain of RhizomideA and a Cs-AL domain of Holrhizin, or a Cs-AL domain after replacement of a Cs-AL domain of glbA by the Cs-AL domain of the Holrhizin, or a Cs-AL domain after replacement of the Cs-AL domain of the glbA by a Cs-AL domain of glpA. The invention also discloses mutants obtained by exchanging the key exchange domain and application of the mutants. Experiments prove that for the RhizomideA, the mutant rzmACsholA can directionally obtain a derivative with C8 lipid chain length; for the Holrhizin, the mutant holACsrzmA can directionally obtain a derivative with C2 lipid chain length; and the two mutants glbACsholA and glbACsglpA of the glbA can obtain derivatives with C8 and C10 lipid chain lengths respectively. It is indicated that the key exchange domain has huge application value in guiding modification of lipopeptide which has a medicinal prospect and even is already a patent medicine.