114results about How to "Mild and easy to control" patented technology

The invention relates to a lignocellulose acid/alkali coupling pretreatment method. Lignocellulose is separated into cellulose, hemicellulose and lignin by acid/alkali coupling pretreatment; and simultaneously, lignocellulose components are separated and subjected to high-efficiency enzymolysis and saccharification. The method comprises the steps of lignocellulose pretreatment, component separation, cellulose enzymolysis, solvent recovery and the like. The lignocellulose material is pretreated by formic acid or dilute sulphuric acid and is then subjected to solid-liquid separation, wherein the liquid component is used for recovering hemicellulose hydrolyzed sugar and part of lignin; and the solid component is further treated by ammonia water or a sodium hydroxide solution and is then subjected to solid-liquid separation, the liquid component is used for recovering lignin, and the solid component (cellulose) is subjected to enzymolysis and saccharification. By converting the lignocellulose into cellulose hydrolyzed sugar (glucose), hemicellulose hydrolyzed sugar (xylose and xylooligosaccharide) and lignin, the invention provides a basis for full-biomass utilization and develops a green process route for recovering the pretreatment solvent.

The invention relates to a g-C3N4 supported cobalt oxide catalyst and a preparation method thereof. The preparation method comprises the following steps: preparing an aqueous solution of cobalt acetate and an aqueous solution of g-C3N4, mixing, and magnetically stirring to obtain a mixed solution A; adding ammonia water to the mixed solution A in a dropwise manner, and magnetically stirring to obtain a mixed solution B; adding the mixed solution B to an autoclave provided with a polytetrafluoroethylene liner, and carrying out a hydrothermal reaction at 130-160DEG C for 8-12h to obtain a mixture; and centrifuging the mixture, removing the obtained supernatant, washing the obtained residual solid substance, transferring the solid substance to an oven, and drying at 60DEG C for 8h to prepare the g-C3N4 supported cobalt oxide catalyst. The prepared catalyst can be used in catalysis of carbon monoxide low temperature oxidation, and can maintain complete conversion of carbon monoxide into carbon dioxide at 122DEG C for at least 2400min.

The invention relates to a positive/negative (P/N) heterojunction based silicon/titanium dioxide three-dimensional composite material with synergic anti-reflection performance. The silicon/titanium three-dimensional composite material is prepared according to the following method of (1) firstly, carrying out anisotropic etching on a silicon wafer with an alkali liquid, and forming a closely-arranged square conical shape on the surface of the silicon wafer; (2) secondly, carrying out hydrophilic treatment on the silicon wafer etched in the step (1), growing titanium dioxide crystal seed on the surface of the silicon wafer, and placing the silicon wafer in a muffle for calcination; and (3), finally, placing the silicon wafer with the titanium dioxide crystal seed on the surface, obtained in the step (2), in a reaction kettle, and obtaining the silicon/titanium dioxide three-dimensional composite material by adopting a hydrothermal method. The composite material disclosed by the invention is compatible with capabilities of excellent reflection elimination and high-efficiency photo-induced charge separation, and can be applied to the fields such as photocatalysis, a photoelectric conversion device and a solar cell.

The invention discloses a double-water-phase extraction method for cistanche deserticola phenylethanoid glycosides. The method comprises the following steps: 1) adding a cistanche deserticola raw material powder into a double-water-phase system; 2) extracting; and 3) transferring a phenylethanoid glycosides enriching phase, concentrating and drying, so as to obtain the cistanche deserticola phenylethanoid glycosides. The method for extracting phenylethanoid glycosides from cistanche deserticola is simple, high in extraction yield, easy for amplified continuous production operation, low in energy consumption, high in phenylethanoid glycosides content in the extract product, and overcomes the disadvantages that conventional method for extracting phenylethanoid glycosides from cistanche deserticola is tedious in operation, time-consuming, low in extraction yield, not high in extracted phenylethanoid glycosides quality, and the like.

The invention discloses a new method for preparing piribedil in a high-purity high-yield manner. The method is characterized by comprising the following steps of: utilizing piperidine as a raw material, and preparing the piribedil through four-step reaction, namely a blanc chloromethylation, an N-single protection piperazine ammoniation, deprotection and 2-cloro pyridine condensation. Compared with the traditional method, the method provided by the invention has the advantages that the N-single protection piperazine replaces piperazine, the piperazine dosage is reduced, a side reaction is alleviated, the impurities of a reaction process are reduced, the operation is simple, the condition is mild and is easy to control, the aftertreatment is convenient, according to the method, the environmental protection is realized, the total recovery is high, and the method is novel and used for industrially compounding piribedil.

The invention provides a preparation method of cadmium molybdate octahedrons with controllable grain size. The method comprises the following steps: adopting quaternary microemulsion composed of nonionic surfactant alkyl polyethenoxy (10) ether (OP-10), cyclohexane, n-octanol and water, using sodium molybdate and cadmium nitrate as reactants, mixing the components of inverse microemulsion, violently stirring with a magnetic stirrer to obtain uniform and transparent inverse microemulsion with stable property, then dropwise adding the microemulsion with cadmium nitrate in the microemulsion withsodium molybdate to react, ageing, centrifugalizing and washing the product with acetone, absolute ethanol and secondary water repeatedly to obtain the cadmium molybdate octahedrons having uniform shape, size and height. The invention adopts the technical scheme that the template action of the inverse micell microemulsion is used to prepare barium molybdate octahedrons so as to solve the problem that the grain size of the product is hard to control by using the existing preparation method of cadmium molybdate octahedrons. The method of the invention is characterized by simple production technology, safe production process and difficult agglomeration of the product and can be widely used in the preparation of inorganic functional materials.

The invention provides a preparation method and application of a CoOOH nanosheet modified Fe2O3 composite photo-anode. The preparation method comprises the following steps: (1) impregnating a preparedFe2O3 electrode plate into a pre-prepared soluble cobalt salt aqueous solution, then carrying out air-purging drying on the electrode plate, and repeating the impregnating operation for several times; and (2) placing the Fe2O3 electrode slice impregnated with the cobalt salt in a strong alkaline solution for hydrolysis, then centrifugally washing the Fe2O3 electrode slice with deionized water, and drying the electrode slice in a drying oven to obtain the CoOOH nanosheet modified Fe2O3 composite photo-anode material. The method provided by the invention is simple and mild to operate, can be completed at room temperature, greatly reduces the energy consumption and risk of synthesis compared with the traditional synthesis method, and has a series of advantages of high catalytic water oxidation activity, good reaction kinetics and the like when being used as a photoelectrically decomposed water anode.

The invention relates to a method for synthesizing an ivabradine key intermediate (S)-4,5-dimethoxy-1-(methylamino)methyl-benzocyclobutane hydrochloride. The method comprises the following steps: performing chiral resolution on 4,5-dimethoxy-1-methylamino-benzocyclobutane to obtain an S configuration of the 4,5-dimethoxy-1-methylamino-benzocyclobutane; preparing formamide from amino group; and reducing with zinc powder to prepare the ivabradine key intermediate in the formula (I). Compared with a traditional method for preparing methylamine by reducing ethyl chloroformate, lithium aluminium hydride or sodium di-aluminum hydride, the method is simple in operation, high in product purity, little in side effect, mild and easily controllable in condition, convenience in post-treatment, environment-friendly, and higher in total yield, and is a brand-new method for synthesizing (S)- 4,5-dimethoxy-1-(methylamino)methyl-benzocyclobutane hydrochloride.

The invention discloses an advanced intermediate of rosuvastatin calcium and a preparation method of the advanced intermediate. An intermediate R1 is prepared from a chiral side chain D42 containing athiadiazole sulfone structure and a parent nucleus Z8.1 containing a pyrimidinecarboxaldehyde structure through Julia enylation reaction. The invention discloses a novel preparation method of R1. Theproduct provided by the invention has the advantages of low preparation cost, high total yield and good quality, and is suitable for industrial production.

The invention relates to a method for preparing a titanium dioxide pattern without a residue layer by a room-temperature transfer impressing technology. The method comprises the following steps: (1) mixing a thermoplastic polymer solution and titanium dioxide sol or a titanium salt solution to prepare a precursor solution; (2) spin-coating or spray-coating the surface of a soft template with the precursor solution in the step (1) to form a composite film, wherein the surface of the soft template has a convex-concave structure; (3) contacting the soft template obtained in the step (2) and a hydrophilic base at room temperature, and transferring the composite film to the surface of the base; (4) calcining the sample obtained in the step (3), and cooling to room temperature; (5) putting the sample obtained in the step (4) into a mixed solution of titanium salt, concentrated hydrochloric acid and water, and forming the titanium dioxide pattern without the residue layer on the surface of the base under the hydrothermal condition. The invention relates to the technical field of micro-nano processing of materials. The titanium dioxide pattern without the residue layer is prepared on planar and curved bases by the room-temperature transfer impressing technology.

The invention discloses metal nanoparticles with peroxidase activity and a preparation method thereof. The preparation method comprises the following steps of (1), 50-200 microliters of phosphate buffered solution at 20-80 mM and pH value 5.0 and 20-100 micro liters of sodium tetrachloropalladate aqueous solution at 20-100 mM are added to a centrifuge tube of 1.5 mL; and (2), 20-100 microliters of reduced coenzyme sodium salt solution at 10-100 mM is added to the liquid obtained in the step (1), distilled water is added to make the final volume of the liquid be 400 microliters, the liquid is stirred and mixed evenly, and the liquid mixture is left to stand at 20-30 DEG C for 8-24 hours to obtain the metal nanoparticle liquid with peroxidase activity. The method is simple, short in period, mild in conditions, and easy to control, and facilitates large-scale industrial production and preparation; and the metal nanoparticles with peroxidase activity have high catalytic activity.

The invention discloses a Miao medicine preparation for treating osteoarticular diseases. The Miao medicine preparation is prepared from the following raw medicinal materials in parts by weight: 1 to 7 parts of radix angelicae sinensis, 1 to 3 parts of stigma saffron crocus, 1 to 4 parts of rhizoma Chuanxiong, 1 to 3 parts of cortex eucommiae and 1 to 3 parts of caulis sargentodoxae. The invention further discloses a preparation method of the Miao medicine preparation. The Miao medicine preparation for treating osteoarticular diseases provided by the invention can be used for effectively treating the osteoarticular diseases. The Miao medicine preparation for treating osteoarticular diseases has the effects of remarkably reducing the IL-1beta(Interleukin-1beta) expression and TNF-alpha(Tumor Necrosis Factor-alpha) expression, thereby restricting inflammatory response and protecting cartilage tissues. The Miao medicine preparation disclosed by the invention can be used for effectively treating cervical spondylosis, has a better curative effect and has the efficacies of tonifying the liver and kidney, strengthening tendons and bones, dispelling wetness and wind and promoting blood circulation to remove meridian obstruction, and can also be used for restricting neuropathic pain. The preparation method disclosed by the invention is simple and easy to operate, mild in conditions, easy to control, short in preparation time, low in cost and easy for large-scale production.

The invention belongs to the technical field of photocatalysis, and particularly relates to a preparation method and application of erbium-doped zinc cobaltate photocatalyst powder. The general formula of the photocatalyst is ZnEr2xCo2 (1-X) O4 where x is equal to 0.02 to 0.06. The preparation method is to use zinc cobaltate as a matrix which is doped with an erbium element, and the crystalline form of the doped matrix is not affected. The photocatalyst powder obtained is high in purity, and the photocatalysis performance is greatly improved. The preparation process realized by adopting direct sintering is simple and easy to operate, the calcination temperature is low, and the conditions are mild and easy to control. The sample prepared has the advantages of high purity, high yield and no need of adding precipitant and low cost, and is suitable for industrial production. The erbium-doped zinc cobaltate photocatalyst powder disclosed by the invention can be applied to increasing the photocatalytic degradation rate of Congo red.

The present invention discloses an environmentally-friendly chemical woven bag comprising an outer layer, a middle layer and a base layer, the outer layer is a pearlised film layer, the middle layer is a polyethylene layer, and the base layer is prepared by alternately weaving warp and weft prepared from polypropylene. The present invention also discloses a preparation method of the environmental chemical woven bag. The environmental chemical woven bag has good waterproof and anti-corrosion properties, is clean in appearance, and three-dimensional, has UV resistance and high and low temperature resistance, and can replace paper-plastic bags for long-term storage of chemical products.