37results about How to "Simple production process and equipment" patented technology

The invention relates to the technical field of industrial wastewater treatment, in particular to feed-level copper sulfate and a production technology thereof. The production technology comprises the following steps of A, preparing rough purification etching waste liquid; B, neutralizing, pressing and filtering; C, extracting, and exchanging ions; D, acidifying and crystallizing. The production technology has the advantages that the environment-friendly and pollution-free effects are realized, the emission of waste gas and wastes is avoided, and the wastes are utilized; the mother liquor is recycled, and the subsidiary liquor is sold back to enterprises, so that the economic benefit is high; the equipment is simple, and the operation is simple and convenient; the content of copper ions in the prepared feed-level copper sulfate is 95%, and the prepared feed can improve digestion systems of livestock and poultry.

The invention discloses a preparation method for 2-phenylpropionic acid. The preparation method is characterized by comprising a 2-phenyl-2-cyano methyl propionate preparation stage, a 2-phenyl propionitrile preparation stage and a 2-phenylpropionic acid preparation stage, wherein the 2-phenyl-2-cyano methyl propionate preparation stage comprises: mixing benzyl cyanide, dimethyl carbonate, methylbenzene and sodium methoxide to obtain a mixture, heating the mixture to 20-100 DEG C, controlling the pressure to 0.5-6MPa and carrying out thermal-insulation reaction for 1-10 hours; after the reaction is ended, steaming out a byproduct methanol under the normal pressure, cooling the mixture to 35 DEG C, dropwise adding dimethyl sulfate DMS at constant speed by controlling the temperature to 35-85 DEG C, and carrying out the thermal-insulation reaction for 1-10 hours at 45-105 DEG C after the dropwise-adding is ended; cooling to 35 DEG C, adding water, stirring, dissolving, and layering; desolventizing to recycle toluene, thereby obtaining compound ester; and carrying out basic hydrolysis reaction and acidification reaction to finally prepare a finished product, wherein the purity of the finished product is high, and the yield of the finished product is higher than 92%. Besides, the production process disclosed by the invention adopts simple equipment and is low in production cost.

The invention belongs to the technical fields of latex matrix preparation technologies and apparatuses for mobile ground assisting facilities in the civil explosive industry, and relates to an intrinsically safe latex matrix ground station. The intrinsically safe latex matrix ground station includes a water phase tank, an oil phase tank, a water phase pump, an oil phase pump and a static emulsifier, the inlet and the outlet of the water phase pump are respectively connected with the outlet of the water phase tank and the water phase inlet of the static emulsifier through pipelines, and the inlet and the outlet of the oil phase pump are respectively with the outlet of the oil phase tank and the oil phase inlet of the static emulsifier through pipelines. The station uses the fully static emulsifier as an emulsifying device, and is a latex matrix preparation and conveying apparatus without stirring, mechanical shearing or matrix pump conveying of colloid in the matrix emulsifying process, the static emulsifier designed by using a jet eddy current emulsifying principle, and a latex matrix prepared in the invention is directly added into a colloid tank in an emulsifying mixing truck from the outlet of the static emulsifier through a flexible tube, so the thermal explosion possibility of mechanical friction is eliminated, and the total energy consumption of a whole production line is reduced.

The invention discloses an aliphatic superplasticizer and a preparation method thereof. According to the invention, a molecular structure with high water reducing rate and good slump retaining performance can be obtained mainly by performing condensation reaction on aldehyde and ketone under strong alkaline catalysis, performing sulfomethylation reaction on carbonylation alpha site and introducingsulfonyl, and controlling the optimal mixing proportion, and meanwhile, a cement activating agent is added in the later period so as to improve the performance of the concrete and improve the strength of the concrete, thus obtaining the novel superplasticizer with excellent performance. According to the preparation method disclosed by the invention, reaction is performed at a relatively low temperature, a heat source is not needed, production process equipment is simple, production is steady and quick, yield is high and investment is low; by using low-cost industrial byproduct, namely sodiumsulfite, material cost is lowered; and by adopting high-efficiency tail gas purifying and recycling method and device, emission without the three wastes is achieved, not only is environment improved,but also raw material consumption and production cost are lowered.

A dripping pill of nitrendipine for treating hypertension is proportionally prepared from nitrendipine and the matrix chosen from polyethanediol 4000, 6000 or 10000, stearic acid, sodium stearate, poloxamer, glycerin gelatin, monoglyceride stearate, shellac and polyoxyvinyl monostearate through thermally fusing said matrix, mixing it with nitrendipine, dripping in condensing agent, removing the condensing agent from their surface, drying in air and packing.

The invention relates to a carbidopa-levedopa sustained-release dropping pill for the treatment of Parkinson's disease and a preparation method thereof. The invention aims to solve the insufficiencies of an oral preparation, and provides a carbidopa-levedopa sustained-release dropping pill, which has advantages of high bioavailability, rapid effectiveness, long action time, low frequency of drug taking, convenient administration, little toxic or side effect, convenient storage and transportation, and suitability for oral administration, and the preparation method thereof.

The invention discloses an asphalt pavement permeable diversion road flat stone and a diversion road structure. The asphalt pavement permeable diversion road flat stone includes a diversion road flatstone body, a tamped soil layer, a pavement, a permeable road edge stone and an asphalt road surface layer. The pavement, the permeable road edge stone and the asphalt road surface layer and the diversion road flat stone are arranged above the tamped soil layer, the permeable road edge stone is arranged on one side of the pavement, one side of diversion road flat stone is close to the permeable road edge stone, the other side of the diversion road flat stone is connected with an asphalt road surface, and the diversion road flat stone is arranged above a sewage disposal well ditch. The size ofthe prepared diversion road flat stone can be changed according to the specific requirements of road traffic design, the thickness is no less than 60MM, diabase and the like or the other broken stonesare arranged on the bottom layer, permeable cement is of a porous structure, and the surface layer is arranged to be of a cement-based or polymer-silica sand fine hole structure. The compressive strength of the prepared diversion road flat stone is more than and equal to 45 MPa, the flexural strength is more than and equal to 4.0 MPa, the city vehicle-mounted load capacity can be completely met,and the surface layer is fine in holes and abrasion-resistant and attractive. All-directional seepage drainage is achieved, and the runoff volume is much higher than that of general flat stones.

The invention discloses a method for co-producing carbon dioxide by using superfine precipitated barium sulfate prepared by barium carbonate. The method is characterized in that barium carbonate and sulphuric acid react according to a specific proportion to generate barium sulfate and carbon dioxide, and the barium sulfate is dried, smashed and packaged to obtain a precipitated barium sulfate product; the carbon dioxide is compressed, liquefied and then filled into a steel cylinder to form a product. The method has the advantages of simple production technique and equipment, high yield and high profits, and overcomes the disadvantages of large operation amount of materials, low yield, complex and enormous technological equipment and the like of a conventional production method.

The invention relates to a troxerutin sustained-release drop pill for the treatment of hemiplegia, aphasia, arteriosclerosis, central retinitis, thrombophlebitis, varicose veins and other symptoms caused by cerebral thrombosis and cerebral embolism, as well as a preparation method thereof. The invention aims at utilizing the sustained-release pharmaceutical technology to make up for the shortcomings of the prior art and providing the troxerutin sustained-release drop pill with high bioavailability, few administration times, long-term effect, no toxicity, no side effects and convenient usage and carrying, as well as the preparation method thereof. The troxerutin is taken as raw material, a hydrophilic skeleton material and a hydrophobic skeleton material are added according to certain weight percentages to be taken as matrixes and evenly mixed, the mixed materials are heated till melting, evenly stirred and arranged in a special pill dropping machine, and then dropped into condensate liquid at appropriate speed for preparation.

A dripping pill of ginsenoside is prepared from ginsenoside through proportional adding polyoxyvinyl monostearate, mixing, heating for fusing, stirring, and dripping in condensing liquid.

A dripping pill of pravastatin is prepared from pravastatin through proportional adding polyoxyvinyl monostearate, mixing, heating for fusing, stirring, and dripping in condensing liquid.

A preparation method of a modified rosin resin aqueous solution comprises the following steps: 1) crushing rosin, putting the crushed rosin into a reaction kettle, and heating for melting; 2) after the rosin is melted, adding unsaturated organic acid into the reaction kettle, controlling the temperature and keeping the temperature for a certain time; (3) raising the temperature and putting polyhydric alcohol into the reaction kettle for reaction; 4) cooling and adding organic amine into the reaction kettle for reaction; and (5) continuously cooling, adding deionized water into the reaction kettle, and stirring to obtain the modified rosin resin aqueous solution. The prepared modified rosin resin aqueous solution does not contain volatile organic solvents, is stable in storage, can replace traditional rosin emulsion and is added into a water-based adhesive for use, so that the adhesive force is improved, and the opening time is prolonged.

The invention relates to a dihydrocodeine tartrate sustained-release dropping pill for treatment of moderate pain and a preparation method thereof. The invention aims to solve the defects of an oral preparation, and provides the dihydrocodeine tartrate sustained-release dropping pill, which has advantages of high bioavailability, rapid effectiveness, long action time, low frequency of drug taking, convenient administration, little toxic or side effect, convenient storage and transportation, and suitability for oral administration, and the preparation method thereof.

The invention discloses a process for preparing functional filling material of fine calcium carbonate powder, and it is characterized in that the process comprises following steps: adding calcium chloride, calcium nitrate or calcium acetate and sodium acid carbonate with 0.001-0.007 mol into deioned water with 100 ml; stirring it; putting it into microwave reactor for chemical reaction under power of microwave with 100-200 W; sucting soild product, washing with deioned water, drying and getting said functional filling material. The invention is characterized by cheap raw materialn simple prepartion process and device, time saving, low energy consumption and cost, and product with pure diamond-shape phase, narrow granular size distribution, large specific surface area and high white content.

The invention relates to the technical fields of chemical engineering materials and preparation technologies thereof, and especially relates to an aqueous flame retardant spray adhesive and a preparation technology thereof. The preparation technology needs a simple device and has a simple process. The aqueous flame retardant spray adhesive which treats water as a diluting agent has the characteristics of no organic matter discharge, no pollution to human bodies or the environment, difficult spray gun obstruction, and no production or use danger. An aqueous resin which is the aqueous flame retardant spray adhesive has a high solid content high to 60%, saves a traffic transportation cost and also saves the liquid adhesive application amount of unit area. The aqueous spray adhesive has the advantages of strong heat resistance, excellent flame retardation performance, avoiding of the appearance of a sprayed product fire, and reduction of the continued diffusion of the fire.

Hypertension is recognized by the medical community at home and abroad as the "most ferocious killer" that threatens the human life, the mortality rate of hypertension is higher than that of any otherdisease, and hypertension seriously affects the human health. Atenolol tablets are administered twice per day, and the blood concentration fluctuates greatly, thereby being necessary to prepare the atenolol tablets into a slow-release preparation. The invention relates to an atenolol slow-release drop pill capable of quickly taking effect and slowly releasing drugs and used for treating hypertension and angina, performing maintenance treatment of myocardial infarction and treating arrhythmia, hyperthyroidism and the like, and a preparation method of the atenolol slow-release drop pill. In order to make up for the deficiencies of the prior art, the invention provides an atenolol slow-release drop pill preparation. The atenolol slow-release drop pill provided by the invention is characterized in that a hydrophobic skeleton capable of slowly releasing drugs and Tween-80 with a solubilizing effect are added on the basis of the existing drop pill technology, the deficiencies of the prior art are effectively overcome, and the atenolol slow-release drop pill has the advantages of uniform drug dispersion, sufficient drug release, long drug release time, reduced patient medication frequency and high bioavailability.