34results about How to "Obvious technological advantages" patented technology

The invention discloses a pressure-bearing integral metallurgy sewage purifying treatment device comprising a sealed pressure-bearing shell, wherein the shell is provided with at least two settling chambers, at least two flocculation reaction chambers and a hydraulic circulating clarifying chamber, and the settling chambers and the flocculation reaction chambers are staggered from bottom to top and are communicated in sequence; the lower end of each settling chamber is respectively connected with a blow-off pipe which extends to the outside of the shell; and the upper part and lower part of the shell are respectively provided with a discharging pipe and a water inlet pipe which extend to the outside of the shell. The treatment device can ensure stable purification effect and strong water impact resistance, has less possibility of being blocked, and is simple and convenient for maintenance; and the fully-sealed pressure-bearing integral metallurgy sewage purifying treatment device can fully utilize the residual pressure of coming water, and water produced by the device can be sent to a pressure filter or a cooling tower with no need of a secondary pressurizing pump station.

The invention provides a method for preparing an amorphous carbon film with piezoresistive performance and toughness on the surface of a flexible substrate. The method adopts high-power pulse magnetron sputtering technology, selects graphite target, sputters and deposits an amorphous carbon film on the surface of a flexible substrate in an inert gas atmosphere, the pulse power supply voltage is 800-1000V, and the pulse duty ratio is 1%-5 %. Compared with the prior art, this method also avoids the problem of damage to the flexible base material caused by excessive temperature during the preparation process, so it can be applied to flexible piezoresistive sensing elements to realize the flexibility of piezoresistive sensing elements.

The invention discloses a beneficiation method for improving the micro-fine particle refractory iron ore flotation ore-concentrate production rate and the recovery rate. The method includes the following steps that pre-treated micro-fine particle rough concentrate is sent to a closed circuit grinding grading system, so that most of the rough concentrate undergoes monomer separation; obtained ground ore products which undergo monomer separation sequentially undergo low-intensity magnetic separation, high-intensity magnetic rough flotation and high-intensity magnetic scavenging carried out at least once, and ultimately, low-intensity magnetic ore-concentrate and high-intensity magnetic rough ore-concentrate are obtained, the obtained high-intensity magnetic rough ore-concentrate is concentrated, concentration bottom currents are involved in a reverse flotation operation, and accordingly reverse flotation ore-concentrate is obtained; the low-intensity ore-concentrate and the reverse flotation ore-concentrate are combined to form a finished ore-concentrate product, foam after reverse flotation enters a high-intensity magnetic floatation procedure for re-flotation, the ore-concentrate after high-intensity magnetic flotation treatment returns to the closed circuit grinding grading system, and the preceding steps are repeated. The method has the advantages that procedure operations are easy and controllable, the iron grade of flotation tailings is low, and the recovery rate of the ore-concentrate is high.

The invention particularly discloses a synthesis method of flucloxacillin sodium and belongs to the field of synthesis of antibiotic medicines. The synthesis method comprises the following steps: reacting 3-(2-chloro-6-fluorobenzene)-5-methyl isoxazole-4-formic acid as a raw material with phosphorus oxychloride under the catalysis of organic amine to generate acyl chloride; dissolving 6-APA (6-aminopenicillanic acid) and inorganic alkaline in water, dripping an acyl chloride solution obtained in the previous step, acidizing by using hydrochloric acid after the reaction is completed, and then layering; concentrating under a reduced pressure, adding residues into an alcohols solvent for dissolution, dripping water to separate out flucloxacillin crystals; and dissolving flucloxacillin acid in an organic solvent, dripping a sodium iso-octoate solution for reaction to produce a product, namely flucloxacillin sodium monohydrate. The synthesis method disclosed by the invention has the advantages that the process advantages are obvious, the product quality is promoted, the yield is improved, and the operation steps are simplified so as to achieve greater production benefits and social benefits.

The invention belongs to the technical field of antibiotic drug synthesis, in particular to a synthesis methodof cefcapene pivoxil hydrochloride. The invention is mainly used for process improvement and optimization of cefcapene pivoxil, and the advantage of the synthesis process of cefcapene pivoxil are obvious; new catalytic agents are used, such as phenol, boric acid and other reagents, thereby improving the product quality, increasing the yield, simplifying the operating steps and realizing greater productivity effect and social effect.

The invention discloses a method for preparing metastable crystal phase precipitated calcium carbonate, which comprises the following steps: (1) adding additive 1 and additive 2 into calcium hydroxide suspension and mixing, and the carbonization initial temperature is 40-60°C; 1 is more than one of group IA metal bicarbonate, group IA metal carbonate, group IA metal hydroxide, barium hydroxide or ammonia water, additive 2 is strontium hydroxide, strontium oxide, strontium chloride or strontium acetate One or more of them, feed carbon dioxide-containing gas, and when the pH of the suspension drops to 7.0 to 7.5, continue to ventilate for 10 to 30 minutes, and then collect the seed crystals from the suspension; (2) the crystal seeds of step (1) The mixture is added to the calcium hydroxide suspension and mixed with carbon dioxide-containing gas. The initial carbonization temperature is 25-50°C. When the pH of the suspension drops to 7.0-7.5, continue to ventilate for 10-30 minutes, and then remove the carbon dioxide from the suspension. The metastable crystal phase precipitated calcium carbonate is collected. The invention has low cost, obvious technological advantages and wide application prospects.

The invention discloses a new process for synthesizing an important intermediate oxinothiophospholipid of omethoate. The process comprises the steps of adopting an anhydrous system to synthesize the oxinothiophospholipid, drying an oxinothiophospholipid coarse ester, and preparing the oxinothiophospholipid. According to the anhydrous reaction process technology provided by the invention, the reaction environment is maximally improved, the progress of main reaction is improved, the adverse factors brought by solid-liquid reaction are solved, the hydrolysis is reduced, the reaction yield is improved, and a salt-containing compound is convenient to post-treat. By using the new process provided by the invention, the purity of the oxinothiophospholipid can reach to more than 89 percent, the yield of the oxinothiophospholipid can reach to more than 86 percent, the purity of ammonium chloride can reach to more than 99 percent, and the ammonium chloride can be directly used as a by-product first-grade product for sales. Compared with the traditional process, the overall effect is greatly improved, and the social benefit and the economic benefit are great.