109results about How to "Not generated" patented technology

The invention discloses a lactose-free milk preparation method based on separation membrane technologies, in which the four membrane technologies of microfiltration, ultrafiltration, electrodialysis and nanofiltration are coupled. The method includes the steps that firstly, most components in milk are intercepted through microfiltration and ultrafiltration, a penetrating solution is an aqueous solution containing lactose and inorganic salt, and after the inorganic salt is recovered by electrodialysis, desalinated liquid containing lactose and a small amount of inorganic salt is obtained; then,the desalinated liquid is subjected to nanofiltration separation to intercept lactose, and thus lactose removal is completed; components except lactose are recombined to obtain lactose-free milk powder through spray drying. By means of the method, the lactose interception rate reaches up to 95.85%; the production of the lactose-free milk powder is realized; meanwhile, water added in the production process can be effectively recovered and reused, lactose is also recovered by nanofiltration, and thus the method can guarantee that the whole process is environmentally friendly and free of by-product generation and raw material waste; besides, no chemical substance is added in the process, and thus the taste of milk will not be affected.

The invention discloses the catalytic cleaning method of trichloroethylene. The method comprises the following steps: insufflating the humid air into waste gas containing trichloroethylene to carry out reaction at the existence of catalyst which is composed by carrier, rare metal, rare earth oxide and phosphorus acid; at humid air and low temperature, the trichloroethylene changed to carbon dioxide and hydrochloride, and the catalyst keeping active. The precious metal content in catalyst is few, and there is not polychlorocarbon byproduct, so the method is effective and environmental conservation.

The invention discloses a transition group element doped room-temperature ferromagnetic two-dimensional material and a preparation method. By adopting the method, the preparation of two-dimensional V0.8Fe0.2Se2 nanosheets uniformly doped with Fe elements can be achieved. The preparation method comprises two steps: first step, a V0.8Fe0.2Se2 bulk single crystal is prepared by a chemical vapor transport method; second step, the bulk V0.8Fe0.2Se2 single crystal is thinned into a two-dimensional V0.8Fe0.2Se2 nanosheet by a liquid phase stripping method. The undoped VSe2 bulk material is nonmagnetic, and the doped two-dimensional V0.8Fe0.2Se2 nanoplatelet has room temperature ferromagnetism. The method comprises the specific steps: 1, weighing elemental single substances conforming to the molarratio and sealing the substances at one end of a quartz tube; 2, making the V0.8Fe0.2Se2 bulk single crystal grow through chemical vapor transport; 3, thinning the V0.8Fe0.2Se2 bulk single crystal into the two-dimensional V0.8Fe0.2Se2 nanosheet by using a formamide solvent and the liquid phase stripping method; 4, collecting the two-dimensional Vo.8Feo.2Se2 nanosheets stripped from the solution by centrifugation. The two-dimensional V0.8Fe0.2Se2 nanosheet prepared by the method is uniform in doping, has room-temperature ferromagnetism, and has a wide application prospect in the field of high-performance spin electronic devices.

The invention belongs to the field of inorganic membrane preparation, specifically relates to a method for preparing L-shaped molecular sieve membranes on a stainless steel metal mesh, a ceramic plate or a sheet glass carrier, and particularly relates to a method of evenly coating seed crystals on the carrier by baking so as to prepare the L-shaped molecular sieve membranes. The method comprises the steps of preparing the L-shaped molecular sieve seed crystal solution, subjecting the obtained seed crystals to centrifugal processing; using distilled water to wash the seed crystals to neutrality; coating the seed crystals in the state of emulsion on the washed surface of the carrier; baking the surface with an electric furnace to cause the emulsion to spread evenly and compactly over the surface of the carrier so as to obtain the carrier coated with the seed crystals; placing the carrier coated with the seed crystals in a synthetic fluid for crystallization at the temperature of 160 to 180 DEG C for 2 to 4 days; drying the obtained molecular sieve membranes in an oven at 80 to 120 DEG C after washing. The X-ray diffraction and scanning electronic microscope test on the synthesized L-shaped molecular sieve membranes show that a layer of continuous and compact L-shaped molecular sieve membranes grow on the surfaces of the seed crystals without mixed crystals and have the advantage of short period for the synthesis of the L-shaped molecular sieve membranes.

The invention discloses a method for preparing amides by metallic sodium-catalyzed ester amination reaction: the reaction is carried out in an autoclave at 90-140°C with ester and liquid ammonia as raw materials and metallic sodium as a catalyst, ester:ammonia=1:1.2 The molar ratio of ~5.0, metal sodium is 4~10% of the molar weight of the ester; when the reaction pressure no longer drops, the reaction is stopped, the unreacted ammonia is recovered, and the obtained reaction product is post-processed to obtain the product. The method can efficiently prepare amides; and the raw materials are cheap, low in toxicity, high in reactivity, less in catalyst consumption, fast in reaction speed, high in reaction conversion rate, and easy to separate products.

The invention discloses a device and a method for adjusting oxygen concentration in a liquid lead-bismuth alloy by using a solid lead oxide, and belongs to the technical field of nuclear engineering. The device comprises a solid oxide ion exchanger bypass, a solid oxide ion exchanger mounting hole, a liquid lead-bismuth alloy inlet, a liquid lead-bismuth alloy outlet, a bypass heat exchanger and a solid oxide ion exchanger, wherein the solid oxide ion exchanger mounting hole is formed in the solid oxide ion exchanger bypass; the liquid lead-bismuth alloy inlet is formed in the solid oxide ion exchanger bypass; the liquid lead-bismuth alloy outlet is formed in the solid oxide ion exchanger bypass; the bypass heat exchanger is wound on the outer wall of the solid oxide ion exchanger bypass; the solid oxide ion exchanger is arranged in the solid oxide ion exchanger bypass. The method comprises the following steps: arranging the solid oxide ion exchanger and the solid oxide ion exchanger bypass respectively; adjusting the oxygen concentration of the liquid lead-bismuth alloy by adjusting the cooling power of the bypass heat exchanger. According to the device and the method, the oxygen content in the liquid lead-bismuth alloy is adjusted by controlling the solid lead oxide, so that the defects existing in the prior art are overcome.

The fibrous nanometer catalyst material excited with natural light and its preparation process belongs to the field of environment purifying material technology. The nanometer photocatalytic particle and polymer carrier solution are high voltage electrostatic spun to form nanometer fiber with nanometer TiO2 particle. The preparation process includes sol-gel process to prepare chemically doped nanometer TiO2; modifying with conjugated organic matter; adding the prepared nanometer TiO2 particle into polymer solution and spinning in high voltage electric field to obtain fibrous nanometer catalyst. The fibrous nanometer catalyst material needs no ultraviolet ray excitation, and may be excited with natural light to degrade organic pollutant. The present invention may be used in purifying air and water.

The invention relates to a method for recycling Al resources in a Friedel-Crafts reaction. The method comprises steps performed after the Friedel-Crafts reaction as follows: (1), a reaction system is concentrated, a reaction solvent is recovered, a replacement solvent is added to disperse concentrated residues when the size of the reaction system is concentrated to 20%-50% of the original size, and concentration is continued until the reaction solvent is completely eliminated; (2), the temperature of the system obtained after the step (1) is controlled to range from subzero 20 DEG C to 100 DEG C, water is added to the system, the mixture is sufficiently mixed and filtered, the replacement solvent is recovered after filtrate is concentrated, meanwhile, a product of the Friedel-Crafts reaction is obtained, aluminum(III) chloride hexahydrate is obtained after a filter cake is dried, and the mole ratio of the added water to aluminum (III) chloride is (1-10):1. According to the method, no wastewater or acid gas is produced, the operation is simple, and environmental protection is facilitated.

The invention belongs to the field of medicine compounds, and provides a preparing method of GLYX-13 and a compound used for preparing the GLYX-13. Fmoc-O-tert-butyl-L-threonine, Fmoc-L-proline, N-carbobenzyloxy-L-threoninamide and proline benzyl ester hydrochloride are adopted as initial raw materials of the method. By adoption of the method, the GLYX-13 can be prepared in a high yield in an industrial scale through eight easy and economical synthetic steps, the GLYX-13 can be prepared through simple process operation in a good yield and at a low cost without the need of utilizing expensive peptide condensation agents or controlled, precursor-chemical or highly corrosive deprotection agents.

The invention discloses a method for preparing N-ethyl-N-hydroxyethylaniline. The method comprises the following steps: by taking N-ethylaniline and ethylene oxide as raw materials, in the absence ofa solvent, under catalysis of taurine, performing programmed heating, directly synthesizing N-ethyl-N-hydroxyethylaniline, cooling, and discharging, thereby obtaining a finished product. The method iseasy in raw material obtaining, good in atom economy, gentle in reaction condition, green and environment-friendly, simple and efficient and applicable to industrial production.

The invention discloses a preparation method of isoxaflutole. The structure of the isoxaflutole is disclosed as Formula (II). The method comprises the following step: contacting a compound disclosed as Formula (I) with an oxidizer, wherein the oxidizer contains peroxy organic acid; the peroxy organic acid is a compound disclosed as Formula (III), wherein X, Y and Z are identical or different and respectively independently hydrogen, halogen, or C1-C3 substituted or non-substituted alkyl group. The preparation method disclosed by the invention has the advantages of short reaction time, thorough reaction, high reaction yield, low raw material cost, mild reaction conditions and the like.

The invention discloses a preparation method of a tertiary amine-terminated polyether nonionic surfactant, and belongs to the field of chemical synthesis technologies and surfactants. The preparation method comprises the following steps: (1) placing a supported catalyst in a fixed bed, and preheating the fixed bed; dissolving polyether amine and paraformaldehyde in a solvent to obtain a dissolved solution; then injecting the dissolved solution into a fixed bed, replacing air in the fixed bed with hydrogen, pressurizing the fixed bed with hydrogen, and carrying out a reaction; (2) after the reaction is finished, collecting feed liquid; and after the feed liquid is cooled, filtering and carrying out reduced pressure distillation to obtain the tertiary amine-terminated polyether. The method for continuously producing the tertiary amine-terminated polyether by using the fixed bed has the characteristics of safety, convenience in operation, short reaction time, few side reactions and suitability for large-scale production; the conversion rate of the primary amine is high, the selectivity of the tertiary amine is good, the yield of the tertiary amine-terminated polyether is up to 98.2%, and meanwhile, the tertiary amine-terminated polyether also has better surface activity.