4166 results about "Fine chemical" patented technology

The invention relates to methods for the identification and use of introns with gene expression enhancing properties. The teaching of this invention enables the identification of introns causing intron-mediated enhancement (IME) of gene expression. The invention furthermore relates to recombinant expression construct and vectors comprising said IME-introns operably linked with a promoter sequence and a nucleic acid sequence. The present invention also relates to transgenic plants and plant cells transformed with these recombinant expression constructs or vectors, to cultures, parts or propagation material derived there from, and to the use of same for the preparation of foodstuffs, animal feeds, seed, pharmaceuticals or fine chemicals, to improve plant biomass, yield, or provide desirable phenotypes.

Various embodiments provide, for example, vectors, expression cassettes, and cells useful for transgenic expression of nucleic acid sequences. In various embodiments, vectors can contain nuclear-based sequences of unicellular photosynthetic bioprocess organisms for the production of food- and feed-stuffs, oils, biofuels, starches, raw materials, pharmaceuticals or fine chemicals.

The invention provides mesoporous spherical alumina and a method for preparing the mesoporous spherical alumina by guiding of a template. By the adoption of an oil column forming method, the template with a guiding function is added into aluminum sol during the aluminum sol preparation process; and during the forming and aging processes of the aluminum sol, due to the existence of the template with the guiding function, a large number of meso-structures are prepared in alumina balls. The mesoporous spherical alumina has the following characteristics of: its specific surface is 150-300 m<2>/g; particle diameter is 0.1-5 mm; pore volume is 0.7-1.5 ml/g; holes, hole diameter of which is 2-40 nm, are greater than 97%; bulk density is 0.30-0.80g/cm<3>; and crushing strength is 70-250 N/granule. The mesoporous spherical alumina can be used as a catalyst or a catalyst carrier in the petrochemical industry and the industry of fine chemicals.

Nanoparticles comprising zinc, methods of manufacturing nanoparticles comprising zinc, and applications of nanoparticles comprising zinc, such as electrically conducting formulations, reagents for fine chemical synthesis, pigments and catalysts are provided.

Various embodiments provide, for example, vectors, expression cassettes, and cells useful for transgenic expression of nucleic acid sequences. In various embodiments, vectors can contain plastid-based sequences of unicellular photosynthetic bioprocess organisms for the production of food- and feed-stuffs, oils, biofuels, pharmaceuticals or fine chemicals.

The invention relates to a preparation method of white paint ink used for textile inkjet printing and belongs to the technical fields of fine chemical industry and material science. The white paint ink used for inkjet printing provided by the invention is formed by the steps of mixing oxide/polymer nano composite particle dispersoid serving as a white colouring agent with a water-soluble cosolvent, a surface active agent and deionized water, stirring and filtering. The white paint ink prepared by adopting the preparation method provided by the invention has good dispersion stability and storage stability, and the preparation method of white pigment ink provided by the invention has the characteristics of low equipment investment, simple production process, stable product quality and the like and is suitable for mass production.

The invention discloses a human fat mesenchymal stem cell extract and lyophilized powder and applications thereof. The human fat mesenchymal stem cell extract is prepared by the steps: collecting subcultured P3-P30 generations of human fat mesenchymal stem cells, culturing with cell growth liquid until 80% of cells are fused, removing culture liquid, washing the cells with a phosphate buffer solution for three times, adding into a serum-free culture solution, continuously culturing for 72 hours, collecting the serum-free culture solution, digesting uncollected cells with a digestion solution, crushing the cells with an ultrasonic crushing device, centrifuging, and then collecting supernatant; and mixing the collected serum-free culture solution and the collected supernatant, filtering, collecting filtrate, concentrating, and sterilizing. The human fat mesenchymal stem cell extract and the lyophilized powder thereof have multiple biological activities, can be used for preparing wound healing or cell repair medicaments and other biopharmaceutical products, and can also be used for preparing whitening products or skin anti-wrinkle products and other fine chemical products.

The invention belongs to the synthesis field of aluminosilicate ZMS (Zeolite Molecular Sieve), and relates to a synthetic method of ZSM-5 zeolite molecular sieves. ZSM-5 zeolites are high-silicon micro-porous zeolites with unique three-dimensional ten-membered ring crossing aperture passages, the diameters of the aperture passages are close to the sizes of benzene rings, and the ZSM-5 zeolites can be widely applied to petroleum refining, petrochemical industry and fine chemicals synthesis. Particularly, nano-sized ZSM-5 zeolites achieve larger external surface area and higher intracrystalline diffusion rate, and have higher activity and selectivity as well as strong coking deactivation-resisting capability in hydrocarbons catalysis conversion reactions. The synthetic method regulates the polymerization degrees of silicon sources and aluminum sources respectively by adding acid and alkali so as to obtain highly reactive reactants, and can rapidly achieve nucleus formation in large quantities in a system so as to obtain nano-sized zeolites. The synthetic method is not limited by the types of the silicon sources and the aluminum sources, has strong applicability to raw materials, changes the activity of the raw materials through simple regulation, and can rapidly synthesize products of the nano-sized ZSM-5 zeolites with well crystallinity under the dosage conditions of no template and low-cost templates.

The invention discloses a preparation method of 2,3-dichloropyridine. 2,3-dichloropyridine is an intermediate in fine chemical industry, which is widely used in the fields of medicine and pesticide. The method comprises the following steps: carrying out chlorination reaction on 2,6-dichloropyridine, which is used as a raw material, to obtain 2,3,6-trichloropyridine; adding the 2,3,6-trichloropyridine, an acid binding agent, a metal catalyst and an organic solvent into a reactor, and carrying out hydrogenation reaction, wherein the mol ratio of 2,3,6-trichloropyridine to acid binding agent is 1:(0.1-0.5); and cooling the hydrogenation reaction liquid, adding water to dissolve the acid binding agent hydrochloride, filtering, standing, separating out the water layer, extracting the organic solvent layer with water-containing acid at least three times, merging the water-containing acid layers after extraction, diluting by adding water, precipitating a solid, filtering, and drying to obtain the 2,3-dichloropyridine product. The invention has the advantages of novel process route, short reaction steps, high yield, low production cost and environmental friendliness, is simple to operate, and is suitable for industrial production.

The invention relates to a method for preparing naphthalene sulphonic acid by sulfonating sulfur trioxide in a microreactor, belonging to methods for preparing dye intermediates in the field of fine chemical engineering. The method comprises the following steps: taking alkyl halide and nitromethane as an organic solvent, naphthalene and derivative thereof as the raw material and organic solution of liquid sulfur trioxide as a sulfonating agent, preparing a solution according to the mol ratio of the organic solvent, the raw material and the sulfonating agent of 19-74:1:1-3 in the microreactor of with channel with the diameter of 10-50 microns, and sulfonating the reaction solution to prepare the naphthalene sulphonic acid by controlling the sulfonation reaction temperature to be between 17DEG C below zero and90 DEG C. The method adopts a continuous flow reactor, solves the problem of impossible transient mixing in the conventional reactor, prevents secondary reaction caused by local excess, and is especially suitable for strong exothermic reaction, fast reaction and flammable and explosive reaction. Compared with the preparation technology in the traditional batch reactor, the invention has the advantages of no generation of waste water and waste acid, clean and environment-friendly technology, consumption of sulphonic acid close to the theoretical quantity, fast reaction speed, low sulfonation temperature, high product yield, good repeatability, high labor productivity and low equipment cost.

The preparation process of nano gold particle material includes the following steps: preparing mixed water solution of HAuCl4, protecting agent and acetone in the weight ratio of 1 to 10-10000 to 100-1500, with the protecting agent being one of polyglycol, PVA and PVP; and irradiating the mixed water solution with ultraviolet ray of wavelength 254-400 nm to complete the reduction reaction to obtain nano gold particle. The said technological process is simple, and can produce pure nano gold particle with controllable size and narrow size distribution range. The produced nano gold particle may be used in biomedicine, electronic industry and fine chemical industry.

The invention relates to a continuous flow micro-reactor for medicine and fine chemical production and preparation and application thereof. The invention belongs to the technical field of the micro-reactor and preparation and application thereof. The reactor device consists of a liquor storage tank, a constant flow pump, a micro-mixer, serpentiform double helix capillary reaction pipes, an optical detector, a constant temperature bath and a connecting duct. The continuous flow micro-reactor is capable of making a reactant move back and forth continuously and spirally in the internal and external path coiled reaction pipes, thereby avoiding the phenomenon of local overheating for the reaction in the prior reactor vessel. The invention also provides a preparation method for the reactor and a method for synthesizing chalcone compounds through the reactor. The continuous flow micro-reactor has the advantages of compact structure, simple preparation, convenient use, high reaction efficiency, low power consumption, little pollution, and the like. The continuous flow micro-reactor can carry out continuous production and on-line tracking of the reaction process and has bright market prospect.

The invention relates to a cleaning agent for an automobile, belonging to the field of automobile chemicals of fine chemical engineering. The cleaning agent comprises components of surfactant, alcohol washing aid, oily washing aid, additive and water. The surfactant and the oily washing aid play a role in promoting dissolving, dissolving and cleaning; the alcohol washing aid works together with the surfactant and the oily washing aid so as to form stable microemulsion and has certain role of permeating, moistening and dissolving; the surfactant, the oily washing aid and the alcohol washing aid work together so that the cleaning agent reaches good cleaning effect; the additive is functional additive. The cleaning agent has no side effects on cast iron, cast aluminum, leather, fabric, rubber and plastics, can effectively clean engines or interior trim surfaces, and has no phenomena of corrosion, decoloring, bubbling and falling off.

The invention belongs to the technical field of fine chemicals and preparation thereof, and in particular relates to waterborne polyurethane and a preparation method thereof. In order to solve the problems of environmental pollution and non-ideal overall performance of the prior art, the invention adopts a technical proposal that the waterborne polyurethane is prepared by the method sequentially comprising the following: (1) a step of preparing polyurethane prepolymer, which is to take polyglycol and diisocyanate as raw materials for polymerization reaction and form the polyurethane prepolymer; (2) a step of performing chain extension reaction, which is to add hydrophilic chain extender and trimethylolpropane as a crosslinking agent to the polyurethane prepolymer so as to perform chain extension reaction; (3) a step of performing end capping reaction, which is to add organic functional silane to a reactor so as to perform end capping reaction; and (4) a step of emulsifying, which is to add organic base, regulate the pH value between 7.0 and 7.5, add deionized water in a state of stirring and obtain a white emulsion. Compared with the prior art, the preparation method has the advantages of eliminating pollution, and improving the overall performance of the product.

An ion exchange method for preparing lithium low-silicon low-aluminum X-type zeolite molecule sieve pertains to microporous material technique field. The invention is characterized in that: firstly, a sodium low-silicon low-aluminum X-type zeolite molecule sieve (Na-LSX) is endowed with a certain Li-ion exchange degree through the exchange of Li-ion water solution, then the lithium low-silicon low-aluminum X-type zeolite (Li-LSX) is obtained through a solid phase exchange method, and the Li-ion exchange degree of the final product is larger than 96 percent. Compared with the traditional ion exchange method, the method has the advantages of low cost, simple technique and thorough exchange, etc., and the prepared Li-LSX type zeolite molecule sieve has wide universal application potentials in the field of the fine chemical and absorption exchange, etc.

The invention discloses a biogas residue humus pot and a preparation method thereof. The biogas residue humus pot is made of 62.5-186.5 parts of fresh biogas residue, 50-150 parts of clay and 0.5-5 parts of cotton seed hulls or 1-18 parts of wheat straws or corn straws. The fresh biogas residue, the clay and the cotton seed hulls (or wheat/corn straws) are proportionally mixed well to obtain a mixture, the mixture is fed into a mould to be manually or mechanically pressed into an object with a rectangular or disc-shaped seeding hole in the middle, and the object is then stripped and naturally aired for 2-8 days or dried so as to obtain a biogas residue humus pot or seedling raising tray. The biogas residue humus pot is full of nutrients and high in organic content, further contains vitamins B, gibberellin, heteroauxin, amino acid and active enzymes, has fine chemical and biological properties, and meets conditions of compost. The biogas residue humus pot has the advantages of no environmental pollution, natural degradability, no need of stripping, simplicity in preparation, low cost, fastness in seedling raising speed, capability of enhancing seedlings, effectiveness and the like.

The invention relates to the field of fine chemical engineering, in particular to an inner wall latex paint. The inner wall latex paint comprises bamboo charcoal powder, photocatalyst, acetate-acrylic emulsion and auxiliary agents acceptable in the coating. The inner wall latex paint provided by the invention releases low formaldehyde and volatile organic compounds (VOC), and the quality of the inner wall latex paint accords with national standards; proved by experiments, the inner wall latex paint can effectively inhibit bacteria, the bacteria inhibiting rate is over 99.99 percent, and the formaldehyde removal rate is 93.05 to 97.06 percent; and the VOC removal rate of the inner wall latex paint is 52.73 to 72.11 percent, the removal rate of benzene is 53.15 to 73.26 percent, and the inner wall latex paint can constantly and effectively remove the formaldehyde and other VOC in the air.

The invention discloses a preparation method of aqueous self-dispersing nanometer carbon black, and belongs to the field of fine chemical engineering. Silane coupling agents containing carbon-carbon double bonds are grafted on the surface of carbon black; polymerizable groups of the silane coupling agents are used for being copolymerized with other aqueous monomers; a layer of polymers with duplex effects of dispersion and stabilization coats the surface of the carbon black particles, so that the goal of self dispersion in an aqueous solvent is achieved.

This is the producing method of a kind of oxidized iron oxide black including following contents: prepare ferrite watery solution; use sodium hydroxide as neutralizaing agent and react with ferrite watery solution to produce hydroxide ferrous; use oxygenous gas as oxidant, and react with said hydroxide ferrous to produce iron oxide black; make the prepared iron oxide black water washed, sieved, dried and comminuted orderly to get blue oxidized iron oxide black pigment product. The oxidized iron oxide black produced by this method has high purity and thin crystal grain, the grain size of produced pigment is thin and even, and has saturated blue ink light black and stable effect to light and atmosphere. It also has strong pigmentation strength and hiding power, and can be used in such fine chemical industry products as printing ink and carbon powder. The farther project is using waste residue containing ferrous sulfate and vented in titanium oxide powder production, to produce ferrous sulfate watery solution and produce oxidized iron oxide black, which can adequately use industry waste material to produce oxidized iron oxide black products of high quality, and reduce environmental pollution.