32results about How to "Abundant sources" patented technology

The invention provides a preparation method of high-purity lithium tetrafluoroborate; and the method comprises the following steps that high-purity lithium fluoride and a boron trifluoride coordination compound react in chain carbonate organic solvent, and lithium tetrafluoroborate is obtained after filtration, concentration, extractive crystallization, washing and drying. In the preparation method of high-purity lithium tetrafluoroborate, the boron trifluoride coordination compound has wide sources of raw materials and is low in price, the linear carbonate organic solvent has low toxin and is environment-friendly, the synthetic reaction conditions are mild, the operation is simple, the equipment investment is low, the lithium tetrafluoroborate productivity is high, the yield is high, the energy consumption is low, the post-treatment is simple, and the method is applicable to large-scale production.

The present invention relates to a method for preparing graphene from a biomass-derived carbonaceous mesophase, which includes: soaking a base substance into an ethanol solution of a biomass-derived carbonaceous mesophase; after a certain period of time, taking out and drying the base substance, a layer of biomass-derived carbonaceous mesophase film being attached to the surface of the base substance; subjecting the base substance to a heat treatment under the protection of a hydrogen atmosphere, then a stacked graphene film was formed on the surface of the base substance; and further subjecting the base substance to ultrasonic dispersion in an alcohol solvent to separate the graphene film and the base substance, then a graphene alcosol was formed. The preparation process of the present invention is easy to implement. The raw material biomass-derived carbonaceous mesophase has abundant sources and is low in cost. The preparation process has low energy consumption, and is applicable to mass production. The obtained graphene film and graphene alcosol can be used in solar cells, nano-electronic devices, sensors, and so on, and have broad market prospects.

The invention discloses a method for preparing methyl levulinate in near-critical methanol by a plant polysaccharide alcoholysis on-pot method. The method comprises the following steps: 1) adding methanol, plant polysaccharide and acid catalyst in a high pressure reaction kettle, wherein the mass concentration of the plant polysaccharide is between 10 and 120g/L, and the molar concentration of the acid catalyst is between 0.01 and 0.06 mol/L, replacing air in the kettle by nitrogen after the kettle is closed, and starting stirring; 2) heating the materials to the temperature of between 160 and 200 DEG C for alcoholysis for 1 to 10 hours; 3) cooling the materials to the room temperature after the alcoholysis is completed, and opening an exhaust valve to collect dimethyl ether; and 4) regulating pH value of the alcoholysis solution to be neutral, distilling the solution under the normal pressure to remove low-boiling products and solvent, and distilling the solution under reduced pressure to obtain the methyl levulinate. The method has the advantages of biomass raw materials, abundant resources and simple and green one-pot preparation process, and has important industrial application value.

The invention relates to a plate with an ionizing ray (X-ray or gamma-ray) radiation protecting function and provides an ionizing ray shielding protective plate. The protective plate comprises the following raw materials in percentage by weight: 7-10 percent of raw wood pulp material, 10-15 percent of cement, 2-5 percent of rare earth composite powder, 60-80 percent of barium sulfate powder and asmall amount of auxiliary materials (mica, aedelforsite and expanded perlite). A manufacturing method of the protective plate comprises the following steps of: preparing raw wood pulp; pulping by mixing; sizing; preparing a molded blank; reshaping and stacking; preparing a molded plate; initially curing; performing steam curing; drying the plate; performing post processing; and the like. The ionizing ray shielding protective plate has dual X-ray and gamma-ray protecting effects, high intensity and light weight, and can be used for replacing a lead plate. The raw materials used in the manufacturing method are sufficient, the foaming procedure in the production process is eliminated, the equipment and the process are simple, and the manufacturing cost is low.

The invention relates to a building wall decoration mortar construction technology. The building wall decoration mortar construction technology has the advantages that since the technological steps of base treatment, base coat construction, division line snapping, rendering coat facing mortar, removing of a brick-simulated type formwork or separating tissue and wall surface glazing are adopted, a building wall is excellent in weather resistance, water resistance, fastness and fireproofing, strong in breathability and suppleness and integrally extraordinary in wash fastness and stain resistance and has a good self-cleaning function, shaping is extremely convenient, and various planar and three-dimensional shapes can be created; the technology is free from toxicity and pollution, safe, extraordinarily environment friendly, saving in labor and materials, low in construction cost, simple and convenient to operate, quick in construction and extremely short in construction period.

The invention discloses a method for preparing levulinic acid through plant polysaccharide degradation under the synergetic catalysis of Lewis acid and Bronsted acid in high-temperature liquid-state water. According to the invention, water, plant polysaccharide, Lewis acid and Bronsted acid are sequentially added into an autoclave, wherein the mass concentration of plant polysaccharide is 20-200g/L, a molar concentration of Lewis acid is 0.01-0.6mol/L, the molar concentration of Bronsted acid is 0.01-0.6mol/L. The autoclave is sealed, and stirring is carried out; the temperature is increased to 145-210 DEG C, and a reaction is carried out for 1-8h; and cooling is carried out. According to the invention, the raw material is biomass which has rich source and which is renewable. With the synergetic catalysis effect of Lewis acid and Bronsted acid, levulinic acid yield is substantially improved, and reaches a maximal value of 65%. The method has good industrial application prospect.

The invention discloses a plant disease-resistant resistance inducer and application thereof. Discovered that 2'-deoxyguanosine can directly cause active oxygen burst of plants and up-regulated expression of a disease-resistant gene PR1, improves the disease resistance of the plants to pathogenic bacteria and exerts the effect of the plant disease-resistant resistance inducer. 2'-deoxyguanosine iswide in source, has the characteristics of high efficiency, non pollution, low cost and the like, has a large application potential as a novel plant disease-resistant resistance inducer and accords with the requirement for sustainable and healthy development of agriculture.

The invention provides a nutrient solution suitable for deep-flow hydroponic lettuce and a hydroponic method. The pH value of the nutrient solution suitable for deep-flow hydroponic lettuce is 4.4-6.5, and the nutrient solution comprises a liquid A and a liquid B. In the formula, a plurality of nitrogen forms including nitrate nitrogen and ammonium nitrogen are contained, and can be absorbed and utilized by lettuce root systems. In addition, the utilization rate of contained EDDHA chelated iron is high relative to EDTA-Fe, so that absorption of iron elements by capillary roots, which exists inthe nutrient solution for a long time, of the hydroponic leaf vegetables can be facilitated, and meanwhile, iron deficiency can be effectively prevented. According to the nutrient solution disclosedby the invention, absorption by the capillary roots can be promoted, vitality of the roots can be increased, the growth period of the lettuce can be shortened, and the content of soluble solids in leaves of the hydroponic lettuce is increased by at least 7.3%.

Provided are a linezolid intermediate and the preparation method thereof and a method for synthesizing linezolid. The structure of the intermediate is shown as formula F2, wherein the compound is prepared by a condensation reaction of (S)—N—(3-chloro-2-hydroxy-1-propyl) acetamide and the compound shown in formula F4. In the preparation methods of the compound shown in formula F2 and linezolid, the reaction system is mild, side reactions are few and the product yield is high.

The invention discloses a preparation method of a polysubstituted pyrrole derivative. By taking a copper salt as a catalyst, a free radical of nitroxide as a co-catalyst, and oxygen derived from air as a final oxidant, the polysubstituted pyrrole derivative is prepared from tetrahydropyrrole. In the process of the invention, only a catalytic amount of copper catalyst and a non-metal co-catalyst are used, and the used oxidant is low in price, the only by-product is water, the post-treatment process is simpler, and therefore the risk of environmental pollution is significantly reduced; the wholeprocess is carried out under an oxygen atmosphere, is not sensitive to moisture, and can be routinely operated under loose reaction conditions; related products can be produced for the fields of biology, pesticides and medicine, and the multi-substituted pyrrole derivative with abundant sources and low price is provided in an environment-friendly way.

The invention discloses a method for preparing a 1,3-disubstituted indolizine derivative. The method comprises the following steps: by taking amine, maleic anhydride, pyridine and an alpha-halogenated compound as raw materials, copper salt as a catalyst and oxygen as an oxidant, preparing the 1,3-disubstituted indolizine derivative in the presence of alkali. According to the method, a process of a one-pot method is adopted, reaction is implemented in one same reactor, no any intermediate needs to be purified, and the synthesis efficiency is greatly improved; only a catalytic amount of a copper catalyst and the environment-friendly oxidant oxygen are used in the process, so that a post treatment process is relatively simple, and the environment pollution risk can be avoided; the whole process is not sensitive to air and humidity, and normal operation can be implanted under a loose reaction condition; and related products can be prepared for fields such as biologics, pesticides and medicines, and the 1,3-disubstituted indolizine derivative which is rich in resource and relatively low in price can be provided.

The invention discloses a method for degrading organic wastewater based on cooperation of natural tourmaline and hydrogen peroxide, and particularly relates to the field of organic pollutant treatment. The method comprises the steps of preparation of tourmaline powder and treatment of organic matter wastewater. Natural elbaite which is rich in source, low in price, non-toxic and harmless and good in cycling stability and hydrogen peroxide are adopted to synergistically degrade acidic organic wastewater, hydroxyl free radicals with strong oxidizing property are generated, and organic pollutants are successfully degraded. The use method of the natural elbaite is simple, the catalytic process is simplified, the cost is reduced, and the degradation process of the acidic organic wastewater becomes more environment-friendly. An example is provided for safely and effectively degrading organic pollutants by utilizing the pyroelectricity of tourmaline.

The water-saving manual movable mop and wiping cloth washing and dewatering device may be used in washing and dewatering mop and wiping cloth without need of hand scrub. It has turned cover, cranking bar on the cover, inside speed variator with two rotation speeds altered via changing the rotation direction of the cranking bar, and driving barrel with one vertical octagonal shaft and adjustable height. It may dewater even in case of some water existing inside the barrel and may utilize water drained from washing machine via moving, resulting in saving in water. The present invention may be used in household and various other fields.

The embodiment of the invention discloses an image processing method and device. The image processing method is applied to electronic equipment. The method comprises the following steps: acquiring a reference image and a target image; acquiring light and shadow information of the reference image; and adjusting the light and shadow of the target image according to the light and shadow information.By utilizing the embodiment of the invention, the problem that higher requirements of users on light and shadow effects cannot be met can be solved.

Disclosed is linoleic acid isomerases and their application in production of conjugated linoleic acid, which belongs to the technical fields of protein engineering and microbial engineering. The linoleic acid isomerase derived from Bifidobacterium is used to produce the conjugated linoleic acid. The recombinant E. coli containing the linoleic acid isomerase of the invention is added into a reaction system containing linoleic acid and react for 3 h to produce conjugated linoleic acids. The conversion rate of the conjugated linoleic acid of the invented method ranges from 12.1% to 42.1%, and the percentage of cis9, trans11-CLA in the conjugated linoleic acid can reach 84.3% to 89.1%. The invention provides a method for using microorganisms to produce conjugated linoleic acids with high safety and yield where cis9, trans11-CLA isomer is the major form in the conjugated linoleic acid products.

The invention provides a schisanhenol derivative with structures represented by general formulas (1), (2), (3) and (4), a preparation method and application thereof. According to the schisanhenol derivative, an active natural product schisanhenol is used as a substrate, and related groups are introduced to synthesize a series of schisanhenol derivatives; it is disclosed for the first time that theschisanhenol derivative has an obvious protective effect on concanavalin A induced HL-7702 human hepatocyte immune injury, it is prompted that the compound can be used for preparing liver protectiondrugs, and the liver protection effect is further explained through biological tests; schisanhenol in the raw materials mainly comes from dried ripe fruits of schisandra chinensis, and is rich in content, high in quality and low in price; and the preparation process is simple in steps, easy to operate and beneficial to large-scale production.