54results about How to "The process is easy to scale up" patented technology

The invention discloses a method for preparing a polyvinylidene fluoride affinity membrane using amino acid as a ligand. The affinity membrane is prepared by hydrophilically modifying a polyvinylidene fluoride hollow fiber membrane and grafting the amino acid ligand. The grafting amount of the amino acid is 150 to 250mg/g for each membrane. The invention also discloses application of the affinity membrane in removing endotoxin in blood plasma, which removes the endotoxin in the blood plasma by a dynamic absorption means. The polyvinylidene fluoride affinity membrane prepared by the method has stable performance, good bio-compatibility and high endotoxin removing efficiency, and can be used for whole blood perfusion as well as blood plasma perfusion.

The invention relates to the technical field of composite material preparation, in particular to a high-strength and high-conductivity graphene reinforced copper matrix composite material and a preparation method and application thereof. Spherical copper powder is used as a matrix material, graphene is used as a reinforcing phase, through the steps such as graphene liquid phase dispersion, ball milling predispersion, surface coating, hot isostatic pressing, hot extrusion and so on, and the high-strength and high-conductivity graphene reinforced copper matrix composite material with nearly fulldense, good conductivity, high tensile strength, high hardness, and high elongation is prepared. The preparation method has good process controllability and is easy to produce on a large scale. The prepared high-strength and high-conductivity grapheme reinforced copper matrix composite material is uniform in structure, the graphene is in good combination with the interface of a matrix, the performance is stable, and great application prospects in the fields of automobiles, aerospace and electronics are obtained.

A fluidized-bed reactor for oxidizing carbon black by ozone with stable fluidizing and no coagulation of carbon black particles has a main body with lower carbon black discharging outlet, gas inlet on its bottom, upper carbon black inlet, gas outlet on its top, internal barrier plate with slits, and gas distributing plate under the carbon black discharging outlet.

The invention belongs to the field of battery materials, and specifically relates to a method for recovering positive active materials from battery material offcuts and slurry. The method comprises the following steps of: filling positive plate or dry positive slurry to be recovered into a pulverizer, screening into a powder, putting the powder into a fluidized bed and removing impurities of conductive carbon and a binder; letting a gas pass through a cyclone separator on the top of the fluidized bed to remove entrained powder, passing through a fixed bed to remove harmful gases, heating and blowing into the fluidized bed for cyclic utilization, cooling the powder at the bottom, and sieving to obtain a qualified positive powder. According to the invention, the process flow is short; the powder is in a fluidization state in the fluidized bed during the process of heat treatment; and the gas and the powder fully contact with each other and the reaction is complete. Therefore, the problems of high impurity content in the product and low recovery rate in a traditional technology are fundamentally resolved; in addition, cobalt and lithium elements are simultaneously recovered, the recovery rate of an active substance reaches up to 94%, and simultaneously side-effect will not be exerted on the active substance and it selectrochemical properties.

The present invention is preparation process of gradient oxidation resisting coating on the surface of carbon material. The preparation process includes the steps of: cleaning and stoving the surface of the carbon material; compounding slurring with silica powder, water and adhesive in certain weight proportion, and coating the slurry onto the surface of the carbon material through soaking, spraying or brushing; compounding silica powder, molybdenum powder, water and adhesive into slurry A of Mo/Si ratio 0.3-0.4, slurry B of Mo/Si ratio 0.8-1.2 and slurry C of Mo/Si ratio 1.8-2.3, and coating slurry A, slurry B and slurry C successively onto the surface of the carbon material through soaking, spraying or brushing; and sintering to obtain the product. The present invention has simple technological process, high production efficiency, good repeatability and low production cost and is suitable for industrial production.

The invention discloses a method for performing modification of chitosan or a derivative thereof on the surface of a medical polyurethane material. The method comprises the steps that: the medical polyurethane material is cleaned and dried; an oxidation treatment is carried out upon a clean surface of the medical polyurethane material, wherein the oxidation treatment includes Jones reagent, ozone or ultraviolet irradiation treatment; the medical polyurethane material obtained after oxidation treatment is placed in a 2-5wt% carbodiimid solution, and a reaction is allowed for 7-9h; washing and drying are carried out; the obtained medical polyurethane material is placed into a solution of chitosan or a derivative thereof, such that a grafting reaction is carried out; the grafted medical polyurethane material is cleaned by washing, and is subjected to vacuum drying, such that a medical polyurethane material with chitosan or chitosan derivative modification on the surface is obtained. The method provided by the invention has the characteristics of easy-to-control reaction conditions, simple procedure, easy-to-enlarge process, and the like. The obtained material has good hydrophilicity and biocompatibility.

The invention provides a synthetic method of pentacycloundecane (PCUD). The method uses cyclopentadiene and benzoquinone as initial raw materials, and a high boiling solvent; and the pentacycloundecane is synthesized through the following three reactions: Diels-Alder addition, ultraviolet cyclization and carbonyl reduction. According to the invention, the Diels-Alder addition, the ultraviolet cyclization and the carbonyl reduction can be continuously carried out without post-treatment, and unnecessary processes in the reactions is simplified, thereby achieving purposes of improving efficiency and reducing cost. The method has advantages of short period, low cost and easily expanded technology; and the synthesized target compound PCUD can be used as a high-energy additive for fuel of solid turbine stamping engines or liquid rocket fuel.

The invention discloses a low-cost, efficient and continuous tea saponin extraction process. The low-cost, efficient and continuous tea saponin extraction process comprises steps as follows: (1) pretreated oil-tea meal is dried; (2) the tea meal with water content adjusted enters an extractor for continuous extraction; (3) extracted wet meal enters a DTDC (desoloventizer, toaster, dryer and cooler) type dryer with multiple material layers and is dried, after the moisture content of dried meal is adjusted, the meal is metered and packaged, and feed grade tea meal is obtained; (4) a tea saponin mixed solution discharged out of the extractor enters a cyclone device for separation; (5) a separated tea saponin concentrated solution is fed into a drying section for drying, and a tea saponin crude product is obtained. With the adoption of the process, the extraction efficiency of tea saponin is effectively improved, and the processing cost is effectively reduced; the tea saponin can be taken as a raw material for feed; the purity of the extracted saponin crude product is improved; large-scale extraction of the tea saponin is easier to realize, the processing benefits of by-products are effectively improved, and the technical bottleneck problem in the aspect of development of byproducts of tea oil is solved.

The invention discloses a large scale human urine protein collection method. The method comprises the following steps: placing absorption agents, which are used for absorbing urine proteins and have been packaged, in the places where urine will pass through to make the absorption agent be able to absorb the urine proteins in the urine; collecting the absorption agents which have absorbed the urine proteins; subjecting the collected absorption agents to a pretreatment; refrigerating and storing the pre-treated absorption agents; and transporting the absorption agents to a processing factory in batches to carry out urine protein desorption process to produce corresponding urine protein raw materials or urine protein products. The large scale human urine protein collection method is suitable for the mass industrial urine protein production, improves the processing amount of urine protein, reduces the transportation cost of absorption agents and the production cost of urine proteins, furthermore, the absorption agents containing urine proteins are subjected to a pre-treatment before storage, thus the urine protein activity is preserved, the urine protein degradation is reduced, the microorganism generation is reduced, so that the urine protein product quality is improved.

The invention discloses a preparation method for collagen hydrogel. The method comprises the following steps that (1) a collagen solution is prepared, specifically, a certain amount of collagen is weighed and put into a reaction kettle, a 0.05-0.5 mol/L organic acid solution with 40-200 times the weight of the collagen is added, and the solution is enabled to pass through a 50-400-mesh sieve repeatedly under the action of a peristaltic pump so as to reach a uniform state; (2) amino acid is added, specifically a certain amount of amino acid is added into the collagen solution prepared in the step (1), and the solution is continuously enabled to pass through a 50-400-mesh sieve repeatedly under the action of the peristaltic pump so as to reach a uniform state; (3) the pH is adjusted, specifically, the solution prepared in the step (2) is placed at a low temperature of 0-10 DEG C, solution replacement is carried out by adopting an ultrafiltration method, ultra-pure water or a buffer solution with the pH value of 6-8 is added in the ultrafiltration process, and ultrafiltration is continuously carried out until the difference value between the pH of permeate liquid and the pH of the added ultrapure water or the buffer solution is less than 0.2; and (4) irradiating is carried out, specifically, a sample prepared in the step (3) is subjected to split packaging and then is irradiated.The preparation method for the collagen hydrogel has the advantages that the uniform hydrogel can be prepared, and the problem of liquid precipitation after irradiation can be solved.

The present invention relates to a fluidized bed reactor used for oxidizing and deoxidizing and baking high calcium magnesium titanium slag to remove calcium for improving the titanium inert solid grade, and comprises a cylindrical column material settlement section, a cylindrical column material reaction section, and a coniform column air preheating section. The main body of the cylindrical fluidized bed reactor is the cylindrical column material reaction section, and the top part is of a horn mouth shape, the top part of the horn mouth column body is connected with the cylindrical column material settlement section, the bottom end of the reaction is connected with the air preheating section. The upper part of the air preheating section is provided with a material feeding port, and the bottom part is arranged with an air distribution plate under which an air inlet is provided. The lower part of the material reaction is provided with a material discharging port, and the top part is provided with an air outlet. More than one baffle with holes is arranged in the material reaction. The present invention can make the residence time of particles of the high calcium magnesium titanium slag prolong following the increase of the grain size to satisfy the requirements of the reaction time of different grain sizes of particles.

The invention discloses a preparation method of an internal haemostatic dressing. The preparation method is characterized by taking human-like collagen as a raw material, adding injection water, stirring and dissolving, then freezing by setting a specific cooling rate for accurately cooling and pre-freezing, vacuum freezing and drying, then carrying out thermal crosslinking, irradiating Co60 and sterilizing to finally obtain an internal haemostatic dressing. The internal haemostatic dressing prepared by the method is high in safety, high in biocompatibility and obvious in haemostatic effect, can be applied to hemostasis of various wounds and post-operation hemostasis, and has good application prospects in relevant fields of biomedical materials and tissue engineering.

The invention aims to provide a method for preparing astaxanthin from haematococcus pluvialis. The astaxanthin in the haematococcus pluvialis can be quickly and efficiently identified, the productiontime is greatly shortened, mechanical stability and thermal recessiveness are realized, the process is simple, operation is convenient, and industrial production is easy to realize.

The invention discloses a method for preparing synthesis gas by co-processing a waste printed circuit board and an organic waste liquid, a heavy product obtained by low-temperature pyrolysis of the waste printed circuit board, waste lubricating oil and the organic waste liquid are used for preparing multi-element slurry for a synthesis gas preparation process, organic matters in the three wastes are fully utilized, and meanwhile, clean water resources are saved; the method has the characteristics of being high in resource utilization efficiency, turning waste into wealth and being environment-friendly, meanwhile, the debromination effect is good, and the problems that in the prior art, when the waste printed circuit boards are subjected to pyrolysis treatment, the recovery value of nonmetal parts is low, liquid products are difficult to utilize and the debromination effect is poor are solved.

The invention relates to a conductive graphene film and a self-assembly preparation method thereof. A graphene powder material and a dispersing aid are added into a reactor according to the mass ratioof 100-5: 1, then the mixture is added into a solvent, the mass-volume ratio of the solvent and graphene is 1-10: 1, the ultrasonic oscillation is performed for 30 minutes to 10 hours, the ultrasonicpower is between 20 and 300 W, and a graphene solution with good dispersion is obtained; and the graphene solution with good dispersion is transferred into a water bath with a temperature of between5 and 90 DEG C, the water bath temperature is lower than a boiling point of the solvent, the graphene solution is maintained in the water bath for 5 minutes to 3 hours, the graphene self-assembles ona gas-liquid surface to form a graphene film, and the graphene film is fished out from the liquid level and is dried at normal temperature to obtain the conductive graphene film. The square resistanceof the graphene film is within the range of between 5 and 3,000 omega/sq, the graphene film has good strength, and the thickness is between 2 and 100 mu m. The method has simple preparation process and easy operation; and the graphene film has the advantages of good conductivity and strength, controllable thickness, cuttable shape, adjustable scale, low cost, and easy process scale-up.