540results about How to "Raw materials are simple" patented technology

Disclosed is a cellulose nonwoven fabric containing cellulose fibers having a maximum fiber diameter of not more than 1500 nm and a crystallinity determined by solid state NMR techniques of not less than 60%. The porosity of the cellulose nonwoven fabric is not less than 40% and not more than 99%.

The invention discloses a method of converting carbon dioxide to methanol and/or dimethyl ether using any methane source or natural gas consisting of a combination of steam and dry reforming, in a specific ratio to produce a 2:1 molar ratio of hydrogen and carbon monoxide with subsequent conversion of the CO and H₂ mixture exclusively to methanol and/or dimethyl ether. This method is termed the BI-REFORMING™ process. Dehydrating formed methanol allows producing dimethyl ether (DME) using any suitable catalytic method, including use of solid acid catalysts. When recycling formed water into the bi-reforming step the conversion of carbon dioxide with methane produces exclusively dimethyl ether without any by-product formation and complete utilization of hydrogen

The invention relates to a method for enhancing a Raman spectrum by using shell isolated nano particles, relating to the field of detection of laser Raman spectrums. The invention provides the universal method which has easy and fast preparation, low cost, strong Raman signal, good repeatability and accurate result, and is used for enhancing the Raman spectrum by using the shell isolated nano particles. The method comprises the following steps of: preparing the shell isolated nano particles with nuclear shell structures taking metal nano particles as kernels and extremely-thin shell inert materials as outer shells; uniformly scattering the shell isolated nano particles on the surface of a sample to be measured; and directly detecting the surface enhanced Raman spectrum.

The invention discloses a method for producing porous nano silica and active carbon by utilizing rice hull ash, which comprises the following steps of: at lower temperature and normal pressure, performing secondary alkali dissolution on subcarbonate, and filtering to obtain alkali-dissolved filter liquor and filter residue; adding a certain amount of dispersing agent into the filter liquor, reducing temperature for ageing, filtering, washing, and removing the dispersing agent to obtain the porous nano silica; and adding an activating agent into the alkali-dissolved filter residue, activating, washing and drying to obtain the high specific surface area active carbon. The alkali and the active carbon can be recycled, and only a small amount of alkali and active carbon is lost. The method has the advantages of not seriously corroding equipment due to no high-temperature and high-pressure alkali boiling, sufficient raw materials, low price, no environmental pollution, and higher quality of the obtained active carbon and silica.

The invention discloses a preparation method of metal halide inorganic perovskite quantum dots. The method includes the steps of firstly, dissolving metal halide salt BX2 and AX in DMSO, and adding surface active agents; secondly, rapidly injecting the mixed liquid in reaction solvent; thirdly, making BX2 and AX rapidly react under the effect of the surface active agent to generate the ABX3 type metal halide inorganic perovskite quantum dots of different morphologies. According to the method, in the low-temperature solution method system, by using different surface active agents and reaction solvent for changing the morphologies of the metal halide inorganic perovskite quantum dots, the performance of the metal halide inorganic perovskite quantum dots is regulated and controlled, and the method has profound significance in constructing high-performance full-solution photoelectric devices.

The invention discloses cannabis sailve extract which is extracted from flowers and leaves of industrial cannabis sailve and rich in cannabidiol (CBD) and a preparation method of the cannabis sailve extract. The preparation method includes the steps that firstly, heat dry treatment is conducted on the flowers and leaves of cannabis sailve, then a subcritical butane extraction technology is adopted, ethyl alcohol serves as entrainer, and crude extract which is rich in cannabidiol is obtained; the crude extract is dissolved in an ethanol solution of a certain proportion, and low-temperature odstearynowanie is conducted; centrifugation is conducted through a centrifugal machine, or filtering is conducted through a filtering machine to remove waxiness; activated carbon is added to liquid supernatant, and decolorization and filtration are conducted; finally, filtrate is subjected to rotary evaporation to remove ethyl alcohol, and the cannabis sailve extract rich in CBD can be obtained. The obtained cannabis sailve extract is high in CBD content and good in color and has a good physiological property. The method is simple in process, industrialized application is achieved easily, and development and utilization of high value-added products of Cannabis sailve are promoted.

The invention relates to a method for preparing ethanol via hydrogenation of acetic ester based on recirculating of recovered hydrogen. The method comprises the steps of: recycling hydrogen in the gas phase of a product by using a pressure swing adsorption (PSA) device and then increasing the pressure for recirculating; heating the mixed gas of acetic ester, circulated hydrogen and fresh hydrogen by using reaction heat; heating the preheated raw material gas by medium-pressure steam and then importing into a reactor so as to realize high acetic ester conversion rate and high ethanol selectivity in the presence of a catalyst; and carrying out gas-liquid separation on the product gas obtained via the reaction, and liquefying and separating the reaction principal product ethanol, a small amount of byproducts and unreacted acetic ester to obtain an initial product. According to the method, hydrogen is recycled and recirculated via PSA so that the use of the raw material hydrogen can be greatly reduced, the reaction raw materials are preheated by fully utilizing the reaction heat so that the energy consumption of the heating and the cooling is decreased, the flow is simple and the control is simple and convenient.

The invention discloses a graphene/Fe-MOFs composite material and a preparation method thereof. Adding oxidized graphene, FeCl3 and terephthalic acid into N, N-dimethyl formamide according to the corresponding ratio of 1-15 g : 100 g: 200 g : 150 ml, ultrasonically dissolving the mixture at a power of 600 W for 1 h, and then controlling the temperature to be at 150 degrees to conduct hydrothermal reduction reaction for 15 h; conducting suction filtration on the obtained reaction liquid, conducting repeated washing and suction filtration on the filter cake with N, N-dimethyl formamide till the filter does not contain incompletely reacted oxidized graphene, FeCl3 and terephthalic acid, controlling the temperature to be at 80 degrees to conduct drying, and then the graphene / Fe-MOFs composite material with good electro-chemical performance is obtained and can be used for super capacitor electrode materials. The graphene / Fe-MOFs composite material is simple and controllable in preparation technology, mild in conditions, low in production cost and suitable for industrial production.

This invention relates to a method for preparing porous spinel ceramic material. The method comprises: (1) mixing magnesite powder 10-90 wt.%, Al(OH)3 powder 10-90 wt.%, water 2-10 wt.% and adhesive 0-3 wt.%; (2) molding; (3) drying the green bodies at 110 deg.C for 4-24 h; (4) sintering at 1600-1800 deg.C, and keeping the temperature for 1-8 h. The porous spinel ceramic material mainly contains MgO and Al2O3, and has main crystal phase of periclase-spinel, spinel or spinel-corundum. The porous spinel ceramic material can be directly contacted with flame retardant magmesium and spinel materials, and is a lightweight heat-insulating flame retardant with uniform pore distribution and high strength.

The invention provides a structure of SiC or Si substrate GaN-based crystal and a method for growing the same. The structure of the GaN-based crystal, from the bottom to the top, comprises an SiC or Si substrate, an A1N buffer layer, an N-type GaN layer, an MQW and a P-type GaN layer, wherein the A1N buffer layer comprises 3 to 5 three-dimensional and two-dimensional circulations, the thickness of the three-dimensional A1N is 50 to 100 nanometers, and the thickness of the two-dimensional A1N is 30 to 60 nanometers. The method for growing the structure comprises the following steps of: performing the three-dimensional growth of the A1N, wherein the growth thickness is 50 to 100 nanometers; performing two-dimensional growth of the A1N, wherein the growth thickness is 30 to 60 nanometers; circulating the steps for 3 to 5 times; and growing the N-type GaN layer, the MQW layer and the P-type GaN layer. In the method, the A1N is used as the buffer layer, and the three-dimensional and two-dimensional circulation resonant growth of the MOCVD is utilized, so that the dislocation density is effectively reduced, and the dislocation density of the grown film is very low; and because the crystal quality is improved and the stress is released, the thicker full-structure LEDs can be obtained by growth and no crack occurs.

Oleaginous microbial biomass is subjected to pyrolysis to make microbial pyrolysis oil for use as a fuel or is otherwise formed into combustible products for the generation of heat and/or light.

The invention discloses a compound feed and a preparing method thereof. The compound feed comprises a solid feed, wherein the solid feed comprises the following ingredients by weight: 0.56-3% of dried honeysuckle stem powder, 1.12-4% of living yellow mealworm or 0.28-1% of dried yellow mealworm, 5.6-20% of yellow mealworm excrement, 0.28-1% of malt powder, 1.12-3% of dried hawthorn powder, 0.56-1% of dried eucommia leaf and eucommia bark mixed powder, 0.672-1.2% of dried fructus forsythiae stem and leaf powder, 0.28-0.5% of ginko fruit and the balance of maize and bean pulp, wherein the sum of the quantities of all the ingredients is equal to 100%. The use of the compound feed for feeding laying hens can prevent chicken flocks from having poultry diseases and improve poultry immunity, and can obviously improve the nutrient ingredients of laid eggs. The cost investment is low.

A high temperature anti-oxidation coating is a protective coating used for inhibiting oxidation at high temperature and aims at solving the defects of comprehensive properties of present high temperature protective coatings used for stainless steel and refractory steel. A high temperature anti-oxidation dry powder coating consists of the following raw materials according to weight percentage: 45-50% of frit, 40-45% of clay and 5-10% of talcum powder. The coating has the advantages of good protection effect when being used in high heat treatment of stainless steel and refractory steel, prevention of oxidation and decarbonization at high temperature between 900-1200 DEG C; no increase of hydrogen in the process of inhibiting oxidation, no harmful effect on parts; automatic fall-off in cooling, reduction of subsequent processing procedures; and convenient coating brush application, as well as readily available raw materials.

The invention discloses a method for preparing cannabidiol-containing hemp extract. The method comprises the following steps: taking mature industrial hemp seeds, drying the hemp seeds, removing impurities, and crushing the hemp seeds for later use; carrying out extraction on the crushed hemp seeds with ethanol with the concentration being 95-100% (V/V) according to a solid-liquid ratio of 1:5 to1:20; filtering the obtained extract, and carrying out reduced pressure concentration to obtain industrial hemp seed extract; dissolving the obtained hemp seed extract in ethanol, and carrying out low-temperature winterization; centrifuging the obtained winterized suspension by using a centrifuge or a filtration technique; decolorizing a supernatant obtained after the centrifugation by using activated carbon, and filtering the supernatant; and carrying out rotary evaporation on a filtrate obtained after the filtration to obtain the cannabidiol-containing hemp extract. The product obtained in the invention has the advantages of high CBD content, good color and good physiological characteristics. The method has the advantages of simple process, easiness in industrial application, and promotion of the development and utilization of high added value products of hemp.

The invention relates to a technology for detecting nucleic acid and provides a nucleic acid detecting method having the advantages of high sensitivity, high accuracy, low cost, simple operation and quickness, and a nucleic acid film chromatographic hybrid strip thereof. The nucleic acid film chromatographic hybrid strip comprises a sampling pad, target nucleic acid sequence capturing probes, a chromatographic film, a water absorbent pad and a back lining, wherein the chromatographic film is bonded to the middle of the back lining; the sampling pad and the water absorbent pad are bonded to both ends of the chromatographic film respectively; and the target nucleic acid sequence capturing probes are fixed on the chromatographic film between the sampling pad and the water absorbent pad in a straight line. In the method, the colored fluorescence marking probes and the film chromatography technology are combined, the type of a template of a sample can be differentiated by two parameters, namely fluorescence and a physical position, so that the quick genotyping detection of nucleic acid is realized. The nucleic acid detecting method is high in sensitivity, and the detection sensitivity reaches 101 copies/reaction. The nucleic acid detecting method is high in specificity, the high specificity are jointly guaranteed by the primers, detection probes and capturing probes, so that the detection result is more stable and accurate.

The invention relates to a bamboo shoot sulfur-free drying process, which is characterized by comprising the following steps: (1) raw material preparation, during which fresh phyllostachys praecox shoots with a base part of which the diameter is greater than 3 centimeters, washing the fresh phyllostachys praecox shoots to remove impurities, removing sheaths, cutting off aged parts, and cutting the shoots along longitudinal axes to obtain bamboo shoot blocks; (2) soaking the bamboo shoot blocks in color protecting solution for 20 to 90 minutes, wherein the ratio of the bamboo shoot blocks to the color protecting solution is 1g:3-4ml; (3) blanching color protection treatment, during which blanching the bamboo shoot blocks, which are soaked in the color protecting solution, in the color protecting solution at 80 to 100 DEG C for 2 to 10 minutes, and immediately washing the bamboo shoot blocks with water after the blanching; (4) permo-treatment, during which the bamboo shoot blocks, which are blanched for color protection, are soaked in osmotic solution for 20 to 40 minutes, and the ratio of the bamboo shoot blocks to the osmotic solution is 1g:3-4ml; (5) drying; and (6) packaging to obtain dry bamboo shoot products. The dry shoots prepared by the invention is short in rehydration time, convenient, sanitary and long in storage life and provides good raw material guarantee for the subsequent bamboo shoot deep processing.

The invention discloses an OMS-2catalyst used in the elimination of benzene series at the low temperature, preparation and application. The catalyst is a manganese oxide octahedral molecular sieve and has a molecular formula of KMn8O16.nH2O. The material is prepared by using a reflux method which comprises the following steps of: preparing buffer solution of KAc-HAc with a pH value of 3.7 to 5.6; adding the buffer solution into PVP-containing Mn(Ac)2 solution; adding solution of KMnO4; stirring; refluxing; aging by sealing; filtering; washing with water; drying; baking; and performing other processing. The catalyst of the invention has the advantages of higher specific area and heat stability, high activity and high stability when the catalyst is applied to the elimination of the benzene series through low-temperature catalytic combustion, capacity of keeping the elimination ratio of the benzene series over 90 percent and not changed within 100 hours, cheap used raw material, namely manganese acetate, simple preparation process, no load of other metals or noble metals,.

The invention provides a method for separating and purifying daptomycin. The method overcomes the defects of the exiting extraction technology of the daptomycin, the purity of the daptomycin is improved, and the final purity of the daptomycin reaches higher than 99.2, so a method capable of industrially purifying the daptomycin is provided.

The invention discloses Raman coding microspheres and a preparation method thereof, wherein the Raman coding microspheres are obtained by coating multi-layer metal nanoparticles on the surfaces of inner core nanoparticles through a layer-by-layer self-assembly method and marking with a Raman active substance. The preparation method and raw materials of the Raman coding microspheres are simple, and the strength of Raman signals of a marker can be regulated and controlled through the number of assembly layers of the metal nanoparticles; compared with the existing Raman making technology, the Raman coding microspheres according to the invention are strong in the Raman signals, uniform in aggregation state of the particles and good in repeatability of the Raman signals.