68results about How to "Maintain physical and chemical properties" patented technology

The tobacco flavor extracting process includes the following steps: 1. crushing tobacco and setting in extracting tank; 2. adding solvent in 2-16 times the weight of tobacco to the extracting tank; 3. decompression reflux extracting at 20-60deg.c temperature and 0.020-0.098MPa vacuum degree for 1-8 hr; and 4. separating the liquid extract through filtering, and decompression concentrating the filtrate at vacuum degree of 0.020-0.098MPa to obtain the tobacco flavor of density 1.1-1.4g/ml. The extracting process is simple, safe, environment friendly, high in extracting efficiency and low in production cost, and the extracted tobacco flavor has the physical and chemical properties of natural tobacco components and may be added to cigarette to improve flavor, raise quality and lower tar.

The invention discloses a preparation method for extracting, separating and purifying hydroxysafflor yellow A from a Chinese medicinal material safflower at high yield and purity. The method comprises the following steps of: performing ultrasonic water extraction on the safflower medicinal material, separating by using HZ801 macroporous adsorption resin, performing LH-20 sephadex chromatographic separation, performing ultrafiltration, and performing freeze drying. The content of the prepared hydroxysafflor yellow A dry powder is 99.8 percent, and the yield of the hydroxysafflor yellow A is 62.7 percent.

The invention discloses a soil sample collecting device. The soil sample collecting device comprises a spiral rod, a sampling device arranged at the end part of the spiral rod and used for collecting the soil sample, and a driving device for driving the spiral rod to rotate; the driving rod is connected with a control device for controlling the driving device, and a positioning mechanism for positioning the coordinate of the soil sample position is arranged on the driving device; the outer part of the spiral rod is provided with a sleeve cylinder for mounting the supporting device. The soil sample collecting device is simple in structure, good in using effect, and easy to operate; by directly collecting the collected soil sample in a storage cylinder, the continuity of sampling is increased, and the physical change of the soil sample in the air is prevented by sealing the soil sample, thereby benefiting the subsequent experimental analysis of the soil sample; moreover, a level gauge is arranged at the upper part of the horizontal rotating drill rig, so that the accurate control of perpendicularity of the sampling device is guaranteed during the sampling process, the collected soil sample is marked directly through the positioning mechanism, the labeling accuracy of the soil sample is guaranteed, and the labor force is saved.

The invention provides a remediation method of alkaline soil, and relates to the technical field of soil improvement. The method comprises the steps of (1), soil preparation; (2), soil loosening agentapplication; (3), soil improving fertilizer application. According to the method, the alkaline soil is restored through the steps of soil preparation, soil loosening agent application, soil improvement fertilizer application and the like to reduce soil alkalinity, improve soil characteristics, loosen soil, increase soil fertility to gradually improve soil alkalinization, soil sterilization and fertilizer addition are conducted while the soil alkalinity is reduced, and the method is a remediation method which has the effects of alkaline soil conditioning agent and value improving and synergism.

The invention discloses a highly heat-conducting phase change heat storage material and a preparation method therefor. The heat storage material is prepared by compounding 67.5% by mass of paraffin, 7.5% by mass of expanded graphite and 25% by mass of through-hole foamed aluminum. The melting point of selected paraffin in the materials is 40-60 DEG C, and the porosity of the selected through-hole foamed aluminum in the materials is over 90%. The material has the advantages that the material is fast in heat absorption and heat release speed and great in heat storage, and is not varied in shape after phase change.

The invention discloses a coating and partial freezing preservation method for hairtail. The method comprises the following steps of (1) carrying out pretreatment; (2) carrying out sterilization; (3)carrying out surface dewatering; (4) carrying out dipping and coating; (5) carrying out vacuum cooling and drying; (6) carrying out low-temperature quick-freezing; and (7) carrying out partial freezing cold storage. The coating and partial freezing preservation method for the hairtail has the advantages that the hairtail is preserved through a combined coating and partial freezing preservation technology, the steps are simple, the operability is high, the juice loss rate in the unfreezing process of the hairtail can be decreased, the physicochemical properties and the sensory quality of the hairtail can be well maintained, and the shelf life of storage and sale of the hairtail in the partial freezing state can be obviously prolonged.

The invention provides a method for river channel restoration. The method comprises the following steps: (1) extracting 2 to 10 cm of sediment from the surface layer of river sediment; (2) placing a honeycomb-like filling material into the river sediment, wherein the upper end of the honeycomb-like filling material is 5 to 10 cm higher than the plane of the river sediment; (3) mixing the extractedsediment in the step (1) with calcium nitrate, a solid bio-stimulant, denitrifying bacteria, photosynthetic bacteria, ammonifying bacteria and nitrifying bacteria, and injecting an obtained mixture into the honeycomb-like filling material; and (4) planting submerged plants and elodea nuttallii which absorb ammonia nitrogen onto a river channel. The method for river channel restoration provided bythe invention combines microbial restoration and plant restoration, can significantly remove TOC and TN in the sediment, can maintain the physical and chemical properties of overlying water, increases the dissolved oxygen concentration of the overlying water, controls the TN concentration of the overlying water, and prevents eutrophication.

The invention discloses a preparation method of a pleiotropic fullerene-vitamins-water-soluble macromolecular ternary complex. The preparation method comprises the following steps of: forcibly mixing fullerene powder, vitamins and water-soluble molecules; then adequately stirring the mixed material in water; and filtering to obtain a transparent filtrate and evaporating to obtain a water-soluble fullerene/vitamine complex. Based on an antioxidant and antibacterial fullerene-water-soluble macromolecular system already invented, vitamins with antioxidation and anti-cancer activity are further introduced to the fullerene-water-soluble macromolecular system so as to obtain a multifunctional water-soluble complex system with antioxidation, antibacterial property and anti-cancer characteristic. The complex has wide application prospect in the fields of cosmetic, biomedicine and the like.

The invention discloses a preparation method of kudzu root isoflavone powder. The preparation method of the kudzu root isoflavone powder includes: using kudzu roots as raw materials, drying, smashing, adding ethanol, then adding cellulose and protease to perform enzymolysis, decompressing and concentrating, and freezing and drying to obtain kudzu root isoflavone; mixing the kudzu root isoflavone, beta-cyclodextrin and soybean lecithin, adding water to make 1000mL kudzu root isoflavone emulsion, and performing ultrasonic processing for 20 minutes; atomizing the kudzu root isoflavone emulsion which is processed by ultrasonic into liquid drops through a spray gun, freezing and curing rapidly after the liquid drops are contacted with compressed nitrogen, placing cured samples in a vacuum freeze drying apparatus to be dried, and obtaining the kudzu root isoflavone powder. The kudzu root powder manufactured by the method fills the blank that no kudzu root powder exists on the domestic market, enzyme treatment is matched with digestion so as to extract flavonoid materials effectively, processing steps are reduced, efficiency is improved, kudzu root flavone can be kept maximally by using a spray freeze drying technique, and products with high economic value and health care value can be obtained.

The invention discloses a simulation system capable of reproducing soot evolution characteristics under a post-injection strategy of an engine, which comprises a soot generator, an electric cylinder controller, a computer control system, a Mckenna diffusion combustor fixed on a displacement bench and a pair of self-locking tweezers arranged above the Mckenna diffusion combustor, and is characterized in that a central steel pipe of the Mckenna diffusion combustor is connected to a gaseous fuel source through a pipeline, air inlet pores of a plurality of metal sintered plates at the periphery of the Mckenna diffusion combustor are all connected to an air inlet main pipeline which is connected with a nitrogen gas cylinder and an oxygen gas cylinder; a coiled pipe is connected to a constant temperature water tank; an in-line electric cylinder connected with the self-locking tweezers realizes connection with the electric cylinder controller through a motor and a programming data line, and model carbon black in a carbon black container is taken into a gas channel through a rotating steel brush under driving of a piston. The simulation system disclosed by the invention can facilitate to simplify research for formation and conversion mechanisms of soot generated under the post-injection strategy of the engine, thereby providing a scientific basis for preventing atmosphere environment pollution.

The invention discloses a dry method selective solid material separation device, and belongs to the technical field of material gravity separation methods. An outlet in the bottom of a fluidization separation bed of the separation device is connected with a high-density material storage bin through a conveying pipeline. An outlet in the top of the fluidization separation bed of the separation device is connected with a low-density material storage bin through an upper portion air channel. An air conveying main pipe connected with an air blower is provided with air conveying branch pipes. One air conveying branch pipe is connected with an outlet pipeline of a feeding device through an air connecting box. The other air conveying branch pipes are respectively connected with an air bellow at the bottom of the fluidization separation bed. According to the dry method selective solid material separation device, a physical method is applied to separation of solid mixed materials, the form of water-soluble substances in the materials can not be damaged, intrinsic physicochemical properties of the materials can be kept, the separated materials can be further utilized, secondary pollution is avoided in the whole separation process, and the dry method selective solid material separation device has the best environmental-friendly effect. Meanwhile, the dry method selective solid material separation device is simple in structure, easy and convenient to operate and manage, free of adding other separation media, low in cost, and applicable to the separation of a majority of materials with different densities.

The invention discloses a 2-EAQ (2-ethylanthraquinone) synthesis device and technology. The technical scheme is characterized in that the 2-EAQ synthesis device comprises a tubular reactor, a hydrolysis kettle and a sphere mixer, wherein a feed chute allowing a solid material to be fed is formed in the sphere mixer; a sprinkling nozzle for jetting a fluid material is arranged in the sphere mixer; a feed tube communicated with the sprinkling nozzle is further arranged on the sphere mixer; the sphere mixer is communicated with one end of the tubular reactor, and the other end of the tubular reactor is communicated with the hydrolysis kettle; with the adoption of the sprinkling mode of the sprinkling nozzle, fuming sulphuric acid is added more slowly, so that the temperature in the sphere mixer is prevented from being increased to be too high due to too high mixing speed of the materials during mixing of the materials, the temperature in a mixing process is controlled to be in a safe mixing temperature range of the two materials, and the mixing process is safer and more stable.

The invention discloses a metal substrate highly heat-conducting heat storage material and a preparation method therefor. The heat storage material is prepared by compounding 75% by mass of paraffin and 25% by mass of through-hole foamed aluminum. The melting point of selected paraffin in the materials is 40-60 DEG C, and the porosity of the selected through-hole foamed aluminum in the materials is over 90%. The material has the advantages of being fast in heat absorption and heat release speed and great in heat storage.

The invention discloses a novel inorganic composite high-thermal-conductivity phase-change heat storage material and a preparation method thereof. The heat storage material is prepared from, in percentage by mass, 83.2% of crystal salt hydrate, 0.8% of an SAP (super absorbent polymer) and 16% of porous aluminum through composition, and the porosity of selected porous aluminum in the materials is 90% or higher. The material has the advantages that the heat absorption and release speeds are high, the heat storage capacity is high, and the appearance is unchanged after phase change.

The invention provides weft knitting cloth and a preparation manner thereof. The weft knitting cloth comprises an upper surface, a lower surface and a middle layer. The middle layer of the cloth comprises connecting threads and core-through yarn, the connecting threads are hooked and connected between the upper surface and the lower surface in the weft direction, and division grids are formed by the connecting threads and upper surface and lower surface yarn hooked and connected with the connecting threads. Fabric units including hollow channels are formed by the adjacent division grids, the upper surface and the lower surface, the core-through yarn is arranged in the hollow channels in a penetrating manner, and the fabric units are woven by a double-face machine. By means of the structure, the core-through yarn is wrapped in the fabric units, the functional core-through yarn is not connected with other yarn any more, the structure of the functional core-through yarn is not destroyed in the weaving process, and functionality and original physical and chemical properties are kept. Meanwhile, much functional core-through yarn can be added into the cloth, and overall functionality offabric is increased; and meanwhile, the functional core-through yarn does not appear on the surface of the weft knitted cloth, the softness of the fabric surface is kept, and the service life of the functional cloth is also prolonged.

The invention discloses a preparation method of a multifunctional ocean engineering alloy. Through coupling of a multi-principal alloy structure, structural entropy and temperature and through powder metallurgy and heat treatment, the intersolubility between elements and the free energy of an alloy system are regulated and controlled, Cu grain boundary segregation is eliminated, and uniform and dispersed nano precipitation of the antifouling element Cu in the corrosion-resistant and high-plasticity multi-principal alloys is realized. The preparation method is simple and controllable to operate, and the prepared material has plasticity higher than 75%, high yield strength, excellent corrosion resistance and antifouling property and has important application prospects in the field of ocean engineering.

The invention discloses a preparation method of inorganic heat preservation paste, comprising the following steps: S1, putting polypropylene cellosilk into a water vat, scattering, adding into a pullvat, adding a proper amount of water into the pull vat, putting the pull vat under a stirrer, stirring, controlling a head of a stirring paddle to approach the bottom of the pull vat, adding an aid, aperformance additive and mica powder in sequence during stirring, supplementing a proper amount of water, and continuously stirring; S2, adding glass beads into the pull vat, stirring, and increasingthe height of the paddle; putting floating beads, paste beads and horn meal into the pull vat in sequence, supplementing a proper amount of water, and stirring until a dry mass disappears; S3, lowering the head of the stirring paddle to approach the bottom of the pull vat, shoveling off materials remaining inside the pull vat, continuously stirring, supplementing a proper amount of water, stirring, supplementing a proper amount of water, and continuously cleaning an edge; S4, pulling the pull vat to be below a lifter, lifting, pouring into a packing bag, weighing, sealing, sewing a pack, andwarehousing after inspection.