37results about How to "Avoid flammable and explosive" patented technology

The invention relates to a method for metal surface treatment through femtosecond laser. The method for metal surface treatment through the femtosecond laser comprises the following steps that polishing treatment is carried out on the surface of a metal piece; the femtosecond laser is used for machining the polished metal piece surface so that a surface with a micro-nano composite structure can beobtained; the surface with the micro-nano composite structure is washed and blow-dried; and the blow-dried metal piece is put at the room-temperature environment for a period of time. According to the method, complex following surface machining treatment procedures are not needed, the metal piece only needs to be kept at the room temperature for a period of time, an excellent surface hydrophobiceffect can be achieved, the process is simple, the machining efficiency is high, and the surface hydrophobic performance of the workpiece is good.

The invention discloses a spherical powder material for 3D printing and a preparation method of the spherical powder material. Preparation raw materials of the spherical powder material comprise thermoplastic resin, modified silicone oil and an emulsifier, wherein viscosity of the modified silicone oil is 600-8000 mpa.s, the thermoplastic resin accounts for 1%-40% by mass of the raw materials. Thepreparation method comprises the following steps: S1, the raw materials are mixed in a reactor and ground; S2, the materials are heated to the temperature 10-100 DEG C higher than the resin melting point; S3, cooling, separation and drying are performed, and the powder material is obtained. The invention aims to solve the technical problems that degree of sphericity of powder printed with selective laser sintering is low, flowability cannot meet requirements and resin powder bonds easily in a heating emulsification process.

The invention discloses a colon delivery tablet by using pectin / corn protein as a coating, which is prepared by a tablet core containing an active drug and a coating layer, wherein the tablet core is prepared by the following components by weight part: 50.0 +/- 20 parts of active drug, 28.0 +/- 10 parts of medicinal microcrystalline cellulose, 14.0 +/- 6 parts of pharmaceutical lactose, 5.0 +/- 2 parts of medicinal sodium carboxymethyl starch and 2.0 +/- 1 parts of medical talc powder, and the coating layer is prepared by the following components by weight part: 160 +/- 40 parts of corn protein, 80 +/- 20 parts of pectin and 60 +/- 15 parts of medicinal microcrystalline cellulose. A colon drug delivery system formed by the colon delivery tablet realizes the purposes of accurate positioning of colon and controlled-release release of drug, and the colon delivery table has simple and convenient preparation process, easy industrialization, and great development and application prospects.

The invention discloses a liquid phase method for producing insoluble sulfur. The method comprises the steps of fusion, atomization and cold extraction, stabilizing treatment, drying, solidification, oil charge and smashing. Firstly, sulphur is added into a fusion kettle with the temperature of 200-250 DEG C and then enters a pressure type nozzle for atomization and cold extraction treatment, a compound stabilizer is added to the sulphur subjected to atomization and cold extraction for stabilizing treatment for 30-40 min, then negative pressure drying is conducted on the stabilized sulphur for 6-8 h with hot water with the temperature of 50-70 DEG C in the environment with the vacuum degree larger than or equal to 95%, then solidification is conducted, finally oil charge adsorption is conducted by adding aromatic hydrocarbon oil, and the insoluble sulfur is obtained after smashing. The insoluble sulfur prepared with the method has high thermal stability, high insoluble sulfur content, high dispersity and high fineness, and the technology is easy to operate, high in efficiency, low in cost, high in safety performance and suitable for industrial production.

The invention discloses a water-base gravure ink copolymer emulsion and a binder, allyloxy hydroxypropy sulfonate sodium aqueous solution is added into a mixed solution containing monomers, hydrophilic monomers, molecular weight regulator and ammonium persulfate of carboxyl and carboxyl functional group for preparing the emulsion by copolymerization , alkaline solution is then neutralized and alcohol solubilizing assistant is added to obtain water-base gravure ink copolymer emulsion and the binder. On the one hand, the water-base gravure ink copolymer emulsion and binder save a large amount of food, one the other hand, the water-base gravure ink copolymer emulsion and binder save reduce the use of organic solvents, thereby effectively avoiding the defects that the organic solvent is inevitably combustible and explosive, pollutes environment and jeopardizes health of production worker, and the environment-friendly requirements of the binder are met. The material is widely applied to tipping paper, has viscosity of 90-150 seconds and strong water absorptivity and slow-release function, and can keep the tipping paper from water absorption and deformation and meet the demands of the production of cigarette filter tip.

The invention discloses a bioactive carbon source for sewage treatment and a preparation method thereof. The bioactive carbon source comprise the following raw materials in parts by weight: 30 to 35 parts of polyol, 10 to 20 parts of chitin, 0.5 to 1.5 parts of vitamins, 3 to 6 parts of glucose, 20 to 22 parts of crude glycerol, 2 to 5 parts of strains and 20 to 25.5 parts of deionized water, wherein the strains are any one or a combination selected from the group consisting of bacteria, actinomycetes, saccharomycetes and molds. The invention relates to the technical field of sewage treatment.According to the bioactive carbon source for sewage treatment and the preparation method thereof, the polyol is used as a substrate; the chitin, the vitamins, the glucose, the crude glycerol and thestrains are used as raw materials to form a carbon source; the bioactive carbon source prepared by using the preparation method provided by the invention can reach a COD equivalent of 200000 mg/L or above and a pH value of 5 to 7; denitrification nitrogen removal is effectively promoted; biological phosphorus removal is reinforced; the input cost is low; the adding amount is small; the operation cost is greatly reduced; the explosive and inflammable characteristics of methyl alcohol and ethyl alcohol serving as carbon sources are avoided; potential safety hazards are eliminated; and the purpose of safe use is achieved.

The invention relates to a one-step synthesis method of polyethyleneimine. The method comprises the following steps: (1) synthesizing monomer ethyleneimine, reacting ethanolamine with concentrated sulfuric acid or hydrogen chloride, and treating with strong base to obtain monomer ethyleneimine and an inorganic salt byproduct; and (2) synthesizing polyethyleneimine, namely directly polymerizing the monomer ethyleneimine obtained in the step (1) under the conditions of an acid catalyst and a polyhaloalkane catalyst without separation treatment to generate polyethyleneimine. According to the one-step synthesis method, on one hand, the use and storage risk and harm caused by high reactivity, corrosivity, toxicity, flammability and explosiveness of the ethyleneimine are avoided; on the other hand, special treatment for removing residual ethyleneimine in the monomer separation process is also avoided. According to the method disclosed by the invention, an intermediate separation step is not needed, so that the possible risks of poisoning, combustion and explosion to operators are greatly reduced, and the pressure of environmental protection is also greatly reduced.

The invention discloses a method for catalytic-selectively synthesizing Z- and E-alkene through alcohol supply hydrogen iridium controlled by a ligand. The method comprises the following steps: usinga disubstituted acetylene compound as a starting raw material, using cheap alcohol as a hydrogen source, and using a metal iridium catalyst MmXn for catalyzing, under the control of a phosphine ligandand a diene ligand, to obtain cis-alkene and trans-alkene in high yield and high selectivity. The method is capable of using the cheap alcohol as the hydrogen source. Compared with a traditional hydrogenation strategy, economic cost is greatly reduced, and the process is simple. A metal iridium complex catalyst does not need to be prepared in advance. The operation is convenient, the product selectivity is good, the yield is high, and the method is suitable for industrial production.

The invention discloses an automatic pipeline mechanical leakage stopping system and an application method. The system comprises a supporting module, a power module, a pipeline direction moving module, a pipeline insulation layer peeling module and a clamp fixing leakage stopping module. The power module supplies power to the pipeline direction moving module, the pipeline insulation layer peelingmodule and the clamp fixing leakage stopping module. Hydraulic power and air pressure power are preferable for the power module. By usage of the system, flammable and combustible accidents and the like can be effectively avoided, the pipeline insulation layer peeling and leakage stopping processes are remotely and automatically finished, potential safety hazards are avoided, and the leakage stopping efficiency is improved.

The invention discloses an acaricide composite comprising flucycloxuron of an effective component, and the composite comprises an active component A and an active component B, wherein the effective component of the active component A is the flucycloxuron, the active component B is one of fenpyroximate, fenisobromolate or fenpropathrin, and the weight percentage of the active component A and the active component B is 80: 1-1: 80. The acaricide composite is a binary acaricide composite, which has great control effect on red spiders of fruit trees.

The invention discloses a riociguat preparation method. According to the preparation method, 1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-formamidine hydrochloride is utilized as a raw material. The preparation method comprises the four steps of reaction of 2-[1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-yl]-5-[(E)-phenyl diazenyl]-4,6-thonzylamine preparation, intermediate of 2-[1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-yl]-4,5,6-pyrimidine triamine preparation, intermediate of 4,6-diamido-2-[1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-yl]-5-pyrimidyl methyl carbamate isopropanol solvate preparation and riociguat preparation. A technological path of the riociguat preparation method disclosed by the invention has the advantages of having high selectivity and high yield, being simple and safe to operate, having low equipment requirement, and being suitable for industrial production and the like.

The invention discloses a compound disinsection water emulsion which contains fipronil and triazophos and a preparation method thereof. The water emulsion comprises 0.5-3 percent of the fipronil, 20-40 percent of the triazophos, 5-12 percent of emulsifier, 0-3 percent of stabilizer, 2-10 percent of cosolvent, 0-5 percent of antifreeze, 0-3.0 percent of thickener and the rest is dispersion medium water, which are dispersed evenly by a high-speed cutting and mixing emulsifier or are homogenized by a high-pressure homogenizer, thus obtaining the invention. The invention does not have insecticide resistance, has high efficacy and special effects on preventing rice stem borers, yellow rice borers, pink rice borers, rice leaf rollers, plutellid moths and diamondback moths; the invention also can control leafhoppers, plant hoppers, flies and coleopteran pests at the same time. The invention adopts the water as the dispersion medium and has the advantages that the invention does not pollute the environment, has no crystallization phenomena after two-year storage and has long shelf life; besides, the invention is not inflammable, can be safely stored and transported and has simple production technique; compared with using the fipronil independently, the cost of the invention can be reduced greatly.

The invention relates to the technical field of biological pesticides, and discloses an animal-derived miticide 20-30% Liujiamansuan (a Cnidocampa flavescens puparium petroleum ether extract with an active ingredient of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid) emulsion in water as well as a preparation method and application of the animal-derived miticide 20-30% Liujiamansuan emulsionin water. The emulsion in water comprises the following components in percentage by mass: 20-30% of Liujiamansuan, 5-8% of a solvent, 2-5% of a dispersing agent, 1-5% of an emulsifier, 1-4% of a co-emulsifier, 0.5-3% of an anti-freezing agent, 0.2-6% of a preservative and 44.4-70.3% of deionized water. The Liujiamansuan emulsion in water is an animal-derived acaricide, the raw drug Liujiamansuan of the Liujiamansuan emulsion in water is derived from Cnidocampa flavescens puparium, and the Liujiamansuan emulsion in water is low in toxicity, easy to degrade, low in residue and safe to the ecological environment, and is a green and safe animal-derived acaricide. According to the present invention, the Liujiamansuan is extracted from Cnidocampa flavescens puparium residue through petroleum ether, such that the benefit of turning waste into treasure is provided, and the Liujiamansuan emulsion in water prepared through the method is one of the important means for achieving ecological agriculture and green agriculture, and has broad application prospects in the field of acaricidal biopesticides.

The invention provides a heat accumulating type steel rolling heating furnace low-temperature flue gas desulfurization and denitrification system and method. The heat accumulating type steel rolling heating furnace low-temperature flue gas desulfurization and denitrification system comprises a soot flue gas desulfurization and denitrification device and an air-smoke flue gas desulfurization device; the soot flue gas desulfurization and denitrification device comprises a soot dry type desulfurization and dust removal mechanism, a soot secondary heat exchanger and a soot SCR (Selective Catalytic Reduction) denitrification reactor which are communicated in sequence; and the air-smoke flue gas desulfurization device comprises an air-smoke heating mixer, an air-smoke dry-type desulfurization and dust removal mechanism and an air-smoke SCR (Selective Catalytic Reduction) denitration reactor which are communicated in sequence. According to the heat accumulating type steel rolling heating furnace low-temperature flue gas desulfurization and denitrification system, the soot flue gas and the air-smoke flue gas are subjected to desulfurization and denitrification treatment respectively, the problem that the soot flue gas and the air-smoke flue gas are inflammable and explosive after being mixed is avoided, the treated flue gas meets the environmental protection requirement, the soot flue gas and theair-smoke flue gas are heated by utilizing flue gas waste heat, a the effects of energy conservation, consumption reduction, safety and environmental protection are achieved, the occupied area is reduced, and the one-time investment cost and the operation cost are saved.

The invention relates to a preparation method of aluminum fluoride composite ceramic, which comprises the following steps: mixing AlF3, MF2, a sintering aid TF and a binder, and carrying out ball milling, drying and screening to obtain an aluminum fluoride mixture, with the MF2 being at least one of CaF2 and MgF2 and the TF being at least one of LiF, NaF and KF; carrying out dry pressing molding or isostatic pressing molding on the aluminum fluoride mixture to obtain an aluminum fluoride composite ceramic biscuit; and sintering the aluminum fluoride composite ceramic biscuit to obtain the aluminum fluoride composite ceramic. According to the preparation method, additives such as MF2 and TF are introduced to replace Al powder, so that the content of fluorine ions in the composite material can be effectively increased on the basis that a disadvantage that Al powder is inflammable and explosive is avoided. Meanwhile, isostatic pressing, air atmosphere pressureless sintering and other methods are adopted, preparation of the large-size aluminum fluoride composite ceramic can be achieved, and the industrial batch production requirement of a BNCT moderator physical device is met.

The invention belongs to the technical field of microorganisms, and particularly relates to pseudomonas and a method for producing pyrroloquinoline quinine through fermentation of the pseudomonas. According to the invention, a new strain Pseudomonas.sp is screened from soil near a pharmaceutical factory, the new strain is named as HQ-2, and the preservation number of the strain is CCTCC NO: M 2021251. The invention also relates to an application of the pseudomonas (Pseudomonas sp) HQ-2 in fermentation production of the pyrroloquinoline quinone, a method for preparing the pyrroloquinoline quinone, and a composition thereof. The strain is aerobically cultured for 1-2 days in a culture medium taking cane sugar and glucose as carbon sources, and the yield of pyrroloquinoline quinone can reach 60mg/L at a shake flask level. The strain screened by the invention can secrete PQQ out of cells, and compared with a common PQQ producing strain, the strain has the characteristics of rapid growth and capability of utilizing sucrose and glucose, and a new strain is provided for industrial fermentation production of PQQ.

The invention provides a preparation method of cetomacrogol 1000, characterized by comprising the steps of (1) dissolving polyethylene glycol a dry organic solvent, adding metallic sodium under stirring and nitrogen protection, and heating to allow refluxing reaction; (2) cooling, dropwise adding bromohexadecane, and heating to allow refluxing reaction to obtain cetomacrogol 1000. The method allows cetomacrogol to be prepared only under the normal pressure by heating and refluxing; the method has no need for high pressure equipment, is simple and safe to perform, and prevents the defects thatethylene oxide is flammable and explosible and carcinogenic and requires strict transport conditions; the method has the advantages that the materials are simple and easy to attain, the process is simple and good in safety, equipment input cost is low, no geographic restrictions occur, and the method is applicable to large-range large-scale production.

The invention relates to bacillus thuringiensis (Bt) virus water dispersible granules (WDGs), which are synthesized from quantitative Bt virus solution and quantitative inactive substances, wherein the virus content in the Bt virus solution is 1,000 to 2,000IU/g; and the inactive substances comprise the following components in percentage by weight: 0.5 to 15 percent of wetting agent, 0.5 to 15 percent of dispersant, 0.1 to 0.5 percent of disintegrating-assisted agent and the balance of carriers. Besides, an adhesive can be also added into the WDG, wherein the adhesive is added in an amount which is 0.1 to 0.5 percent based on the total weight of the inactive substances, and consists of one or more than two of starch, carboxymethyl cellulose and xanthan gum. The preparation method comprises the following steps of: calculating and preparing the Bt virus solution and every inactive substance according to the weight percentage; adsorbing and drying the Bt virus solution by using the carriers; mixing and crushing; and pelletizing by adding water to obtain a finished product finally. The Bt virus WDGs contribute to using Bt viruses at any time, are suspended after being dispersed, do not cause dust pollution and hardly causes harm to human bodies during use, has high fluidity, is not caked or stuck to walls, and has high storage stability.

The invention discloses a photo-induced catalytic method for selectively synthesizing a cis olefin and a trans olefin by using alcohol as a hydrogen source. According to the method, a di-substituted acetylene compound is used as an initial raw material, the cheap alcohol is used as the hydrogen source, phosphine and an amine compound are used as ligands, metal palladium MmXn is used as a catalyst, light is used as an induction initiator, and the cis olefin and the trans olefin can be obtained with high yields selectively under a room temperature condition. According to the photo-induced catalytic method for selectively synthesizing the cis olefin and the trans olefin by using the alcohol as the hydrogen source, the cheap alcohol is adopted as the hydrogen source, the light is used as the induction initiator, a reaction is carried out under the room temperature condition, compared with a traditional hydrogenation strategy, the photo-induced catalytic method for selectively synthesizing the cis olefin and the trans olefin by using the alcohol as the hydrogen source has the advantages that the economic cost is greatly reduced, steps are simple, operation is convenient, the product selectivity is good, the yields are high, and the photo-induced catalytic method for selectively synthesizing the cis olefin and the trans olefin by using the alcohol as the hydrogen source is suitable for industrial production.

The invention discloses a processing technology of a water-base gravure ink copolymer emulsion, the method of the processing technology comprises the following steps: first mixing allyloxy hydroxypropy sulfonate sodium with water, adding a certain amount of mixed solution consisting of vinyl acetate, tertdecanoic acid ethenyl ester, itaconic acid, hydroxyethyl acrylate and dodecyl mercaptan, heating the solution up to 60-70 DEG C, then adding a certain amount of ammonium persulfate aqueous solution for reaction to the temperature of 78-82 DEG C, starting dropwise adding the remaining mixed solution when the reflux stops, adding the ammonium persulfate aqueous solution every one-hour addition, adding the remaining ammonium persulfate aqueous solution upon the ending of the addition for heat preservation at the temperature of 90-95 DEG C, and then cooling to prepare the emulsion. The material is mainly used for preparing a water-base gravure ink binder that is applied to tipping paper. On the one hand, the prepared binder saves a large amount of food, and on the other hand reduces the use of organic solvents, thereby effectively avoiding the defects that the organic solvent is inevitably combustible and explosive, pollutes environment and jeopardizes health of production worker, and the environment-friendly requirements of the binder are met.

The invention provides an aerosol type water-based nanometer phase-change energy-storage heat-insulationexterior wall coating and a preparation method thereof. The aerosol type water-based nanometer phase-change energy-storage heat-insulation exterior wall coating utilizes the characteristics that a nanometer phase-change capsule is melted to absorb heat when a temperature is higher than a phase change point, and is reversely crystallized to release heat when the temperature is reduced to be lower than the phase change point; effective balance adjustment is carried out on the temperature of a building object in a high-temperature (summer) state and a low-temperature (winter) state, and therefore, heat insulation effect is effectively improved; and in addition, the durability of the heat-insulation coating can be effectively improved by utilizing the super stain resistance and the super aging resistance of water-based nanometer fluorocarbon resin. The preparation method of the aerosol type water-based nanometer phase-change energy-storage heat-insulation exterior wall coating is simple, an aerosol can of a binary packaging structure is adopted, the problems that the compatibility of conventional water-based polymer resin and a propellant is poor and water-based contents corrode a metal can are solved, and the problem that conventional aerosol products are flammable and explosive is solved.