73results about How to "Improve the production operating environment" patented technology

The invention discloses a method for preparing a multistage micron structure on a titanium implant surface and relates to a titanium implant. The method includes polishing the titanium implant surface, performing oil removing treatment, and cleaning; subjecting the titanium implant which is subjected to the oil treatment and cleaning to acid dipping treatment in a mixed solution containing a nitric acid, a hydrofluoric acid and hydrogen peroxide; subjecting the titanium implant surface to sand blasting treatment; cleaning the titanium implant which is subjected to the sand blasting treatment; subjecting the cleaned titanium implant to acid etching post-treatment in an acid etching solution; and subjecting the titanium implant to heat treatment and cooling the titanium implant to the normal temperature to obtain the titanium implant with the surface in the multistage micron structure. According to the method for preparing the multistage micron structure on the titanium implant surface, the contact area between the titanium implant and bone tissues is increased, osteoblast ingrowth is facilitated, and thereby the forming of bone closure is facilitated; processing devices are easy to obtain, the operation process is simple, the environmental pollution is small, and the industrialization is easy to achieve; and the appearance is abundant, and the hydrophilic performance is excellent.

The present invention discloses a manufacture process for high quality carbazole and anthracene. The method is to wash the raw material once for removing a number of light constituent, phenanthrene, carbazole derivatives, a small quantity of anthracene and part of heavy constituent, and the loss of the carbazole is less. Afterwards, a vacuum rectification tower with siding withdrawing is adopted for withdrawing the carbazole from the siding at a proper height of the tower. The purity can reach 90 to 95 weight percent, and meanwhile a mixture with the overall purity of the anthracene and phenanthrene being up to more than 90 weight percent is obtained from the top of the tower. The two materials are respectively washed by a No.1 solvent and a No.2 solvent, and the trace impurities contained in the materials are removed. After centrifugalized, fine carbazole and fine anthracene products which are better than the first grade product (carbazole of more than 97 weight percent and fine anthracene of more than 95 weight percent) according to the national standard can be obtained. The solvent wash is operated at a normal temperature, the solvent can be withdrawn for periodic duty, is less in loss quantity, and does not pollute environment. Not only the large-scale successive industrial production of fine carbazole and fine anthracene can be realized easily, but also the process is economic in investment, low in energy dissipation and friendly in environment.

The invention relates to a continuous ring-opening production process for epoxy-terminated polyether and belongs to the technical field of organic polymer compounds. Allyl alcohol polyoxyethylene ether and epichlorohydrin are adopted as raw materials. The process includes mixing the allyl alcohol polyoxyethylene ether and the epichlorohydrin, heating, continuously feeding the mixture to a two-stage fixed bed reactor, performing a ring-opening reaction under catalysis of a solid superacid, adding a product collected by a collecting tank at the lower end of the reactor to a reaction kettle through a metering pump every 2-4 h, adding an alkali and a quaternary ammonium salt catalyst, stirring for 1-4 h while maintaining the temperature, filtering to obtain a crude product, performing vacuum distillation to recover the epichlorohydrin, and purifying to obtain a qualified product. The process is applied for producing the epoxy-terminated polyether, and has advantages of a high equipment utilization rate, a high production efficiency, and the like.

The invention discloses a packing material for baking and particularly relates to a processing method and a processing system for the packing material for baking applicable to producing anodes, cathodes and electrodes for aluminum. The processing method for the packing material for baking comprises the following steps: sending metallurgical coke to sieving equipment for sieving; sending the metallurgical coke with qualified sieve size into a finished product screw conveyer; sending the metallurgical coke with unqualified sieve size to the processing equipment for processing; and sending the metallurgical coke which is sent to the metallurgical coke to a finished product silo. The invention adopts processing technology of the packing material for baking to process the metallurgical coke through crushing and sieving into a finished packing material product with optimum matching which has a size fraction of between 0.5 and 6 millimeters and has compressibility, adsorptivity and gas permeability, improves the volume density and the mechanical strength of a baked product and reduces the contraction rate of a green body. The method improves production operation environment. The method effectively solves technical problems that raw materials of the packing material have small selectivity and high cost, and the packing material can cause serious environmental pollution and raw material loss during the transportation.

The invention discloses a preparation method of cortisone acetate, which comprises the following steps: preparing the raw material 11-hydroxy-16,17-epoxy-4-ene-3,20-dione into 17-alpha-hydroxy-4-pregnene-3,11,20-trione; and carrying out substitution and replacement reaction on the 17-alpha-hydroxy-4-pregnene-3,11,20-trione with raw materials bromine, potassium acetate and the like to obtain the cortisone acetate. The method specifically comprises the following steps:(a) in an inert gas protective atmosphere, reacting 17-alpha-hydroxy-4-pregnene-3,11,20-trione with pyrrolidine by using alcohol as a solvent to obtain an intermediate compound A; and (b) in an inert gas protective atmosphere and in the presence of catalysts methylsulfonic acid and triethyl orthoformate, carrying out substitution reaction on the intermediate compound A and bromine by using alcohol as a solvent, and carrying out replacement reaction on the product and postassium acetate to obtain the cortisone acetate. The new process disclosed by the invention can greatly lower the production cost of cortisone acetate.

The invention discloses a method for preparing 2-benzamido-3-aryl acrylate, and belongs to the field of organic chemical synthesis. The method is mainly implemented by the following steps: adding aromatic aldehyde, ethylhippurate, acetic anhydride and an alkali catalyst into a three-mouth flask according to a certain proportion under the protection of argon, and performing condensation reaction under a certain temperature condition to obtain a 2-benzamido-3-aryl acrylate compound by one step. According to the method, production steps are shortened, the method is easy to operate and control, the production operation environment is improved, the yield and the quality of a product are improved, and the reaction time is shortened; the 2-benzamido-3-aryl acrylate is mainly used for evaluation of the activity of a chiral ligand and catalyst thereof, medicinal synthesis, a pesticide, a photoelectric material and the like.

The invention relates to the technical field of metal conductor processing, in particular to a production process of a copper coated aluminum-magnesium bimetallic conductor, solving the technical problems of unreasonable prior art and the like. The production process comprises the following steps of: A, surface preprocessing; B, zinc deposit preprocessing; C, cyanogens-free nickel preplating; D, silicate copper plating; and E, postprocessing. The production process of the copper coated aluminum-magnesium bimetallic conductor has the advantages that: 1, the surface activity of an aluminum-magnesium alloy is better regulated, operation quality in a subsequence electroplating process and stability in a drawing process are ensured; 2, the problem of broken wires of electroplating intermediate products in a subsequent drawing process is solved, yield of final products is increased; and 3, electroplating is carried out by adopting a pulse modulation power supply, a microstructure of electrocrystallization copper is improved, compactness of a copper coating is improved, and hydrogen evolution side reaction is inhibited.

The invention discloses environment-friendly printing ink for POF shrink film printing. The printing ink is composed of a printing ink main body and diluent. The printing ink is characterized in that the weight ratio of the printing ink main body to the diluent is 1:1; the printing ink main body is prepared from the following components in percentage by weight: 25-35% of EVA resin solution, 10-20% of ethyl acetate, 10-30% of n-propyl acetate, 8-37% of pigments, 1-3% of polyethylene wax, 1-5% of dispersant, 10-20% of modified material and 1-3% of rosin resin. The POF shrinking film gravure printing ink prepared by the formula realizes industrial production of the POF shrinking films. The POF shrinking film is a safe and reliable soft shrinking film which is high in transparency, high in shrinking percentage, high in toughness, high in hot-sealing performance, and excellent in static resistance and cold resistance, so that the production and operation environments are greatly improved and the POF shrinking film is environment-friendly and sanitary.

The invention relates to a movable slag hot-stew dust removal device and method. In the slag hot-stew treatment process, in the operations of deslagging, drossing and slag-out, top-suction exhaust isconducted on hot-stew smoke in a plant through a movable hood vehicle. The movable hood vehicle is combined with a rotating cover for dust removal, the movable hood vehicle can move on a movable trackin a reciprocating manner for dust removal without influencing the slag hot-stew operation under the condition of opening the rotating cover; and the movable hood vehicle is connected with a telescopic pipeline, and the smoke enters a wet type hydrocyclone through the pipeline, is subjected to dust removal and then is exhausted from a chimney under the effect of a fan. The movable slag hot-stew dust removal device and method have the beneficial effects that based on the device and method, up-to-standard emission of hot-stew dust removal of the slag is achieved, PLC remote control is adopted for the device, the occupied area is small, the degree of automation is high, and the production operation is convenient. By the adoption of the movable slag hot-stew dust removal device and method, the production operation environment of workers in the slag hot-stew process is improved, the exhaust dust concentration of the dust removal smoke is lower than 30 mg/m<3>, and the organized up-to-standard emission of the smoke in the slag hot-stew plant is achieved.

The invention relates to a suspended steel tube externally sprayed plastic powder recovery integrated spraying production line. The suspended steel tube externally sprayed plastic powder recovery integrated spraying production line comprises a base, a rack, a powder spraying moving box, a powder spraying moving box moving device, a steel tube conducting rack and a steel tube supporting rack, wherein the steel tube conducting rack drives a steel tube from a preheating furnace to move to the steel tube supporting rack; the steel tube supporting rack supports the steel tube from two ends and rotates at the same time; the powder spraying moving box moving device drives the powder spraying moving box to pass from the outer surface of the steel tube to spray the outer surface of the steel tube.The side wall of the spraying box in the production line provided by the invention is of double layers, a through hole is formed in the lower portion of the inner side of the box body, and residual powder after spraying can be recovered to the powder spraying box through a recovery isolating layer, so that powder is fully recycled, and the raw materials are saved.

The invention belongs to the technical field of fine chemical engineering, and specifically discloses a preparation method for benzyltriphenylphospho. The preparation method comprises the following steps: performing reflux reaction by utilizing reaction exotherm at a certain initial temperature in a mixed solution of water and benzyl chloride by taking triphenylphosphine and the benzyl chloride asraw materials; allowing standing still for layering, preserving heat and separating liquid, performing micro-membrane filtering, cooling and crystallizing, performing centrifugal separation and performing vacuum drying to obtain the benzyltriphenylphospho. The preparation method provided by the invention is simple in process, quick in reaction, mild in conditions, high in purity and high in yield. According to the preparation method, the water serving as the solvent and excessive benzyl chloride are recycled for utilizing; the reaction is accelerated by utilizing the reaction exotherm, so that energy conservation and emission reduction are realized; the cost is reduced; industrial production is facilitated better. The content of the benzyltriphenylphospho synthesized by the preparation method is 99% or higher, and the reaction yield is up to 98%.

The invention relates to a production method of a slow-release fertilizer and particularly relates to a synchronous slow-release humic acid fertilizer and a production method thereof. The synchronous slow-release humic acid fertilizer comprises the following raw materials in parts by weight: 36-42 parts of urea, 7-12 parts of monoammonium phosphate, 7-12 parts of potassium hydroxide, 26-32 parts of humic acid, 6-10 parts of sodium hydroxide and 0.5-3 parts of trace elements. By using the synchronous slow-release humic acid fertilizer, a slow-release effect synchronous with a fertilizer demand curve of crops is achieved, the quality of soil can also be improved, the stress resistance of the crops is improved, and the quality of a fruit is improved.

The invention discloses a new process for producing O, S-dimethyl-N-acetylphosphoramidothioate. In the prior neutralizing process for preparing the O, S-dimethyl-N-acetylphosphoramidothioate by adopting acetylation of O, S-dimethyl acetylphosphoramidothioate, the process adopts sodium carbonate solution or sodium bicarbonate solution to carry out neutralizing treatment; the process not only can effectively improve the production operating environment and simplify the process facilities, but also can facilitate the produced wastewater to be treated easily, and can reclaim sodium acetate conveniently with low cost so as to greatly reduce the production cost which can be reduced by about 5,000 yuan for each ton of O, S-dimethyl-N-acetylphosphoramidothioate; and the process is a new process which is economical and environmentally-friendly, is easy to be controlled and can be steadily operated for a long term.

The invention provides an injection molding process machining method for a large composite material reinforced thin-wall support structure. The method comprises the following steps that an injection molding machine heats raw materials to enable the raw materials to be in a molten state; a mold is closed under the action of high pressure, the injection molding machine injects the molten materials into a pouring system, wherein a cooling system is always in a working state while the mold is closed; after the injection action of the injection molding machine is completed, the mold is opened aftermaintaining pressure for a period of time; and an ejection system ejects out a workpiece. According to the method, the process of directly carrying out injection molding through the mold when the thermoplastic materials are in a viscous flow state is adopted, the product performance requirement is equivalent to that of a metal product, the production energy consumption is reduced, the productionoperation environment is excellent, mass production in a short time can be realized, and the production cost is greatly reduced.