74results about How to "Novel process route" patented technology

The invention discloses a method for synthesizing (2S,3S)-3-amino-bicyclo[2.2.2] octane-2-formate and belongs to the field of pharmaceutical intermediate synthesis. The purposes of the invention are to solve the problems of high preparation cost, low material safety and the like of (2S, 3S)-3-amino-bicyclo[2.2.2] octane-2-formate, further improve the productivity and reduce the production cost. According to the method disclosed by the invention, 3-carbonyl-bicyclo[2.2.2] octane-2-formate is used as a starting material, and reductive amination, basic configuration inversion, hydrogenation protection group removal and the like are sequentially carried out, so that the target product is obtained. According to the invention, the (2S, 3S)-3-amino-bicyclo [2.2. 2] octane-2-formate is synthesizedby using the synthesis method, the novel process route is used, the yield is more than 65%, and the method has characteristics of novel route, mild reaction condition, low cost and the like.

A short-process preparation method of TA5 titanium alloy medium-thick plate for ships, which adopts the whole-process process design concept, and comprehensively controls the edge of TA5 medium-thick plate from the aspects of slab selection, widening and reversing rolling, heat treatment process design, etc. Cracks, plate shape, structure and performance, the slab used in the production of medium and thick plates by this method is small, the production is convenient and flexible, and the requirements for equipment capacity are low.

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 discloses a preparation method for lithium secondary battery micro water ferric fluoride anode materials, wherein, firstly, teracidic malysite and alkali are uniformly mixed in an aqueous solution under normal temperature in proportion from 1 to 1 - 1 to 10; water is removed after sucking filtration; iron-alkali mixture is obtained after drying for 1 to 48 hours; secondly, the iron-alkali mixture and 5 to 40 percent hydrofluoric acids are uniformly reacted in a plastic sealed container in proportion from 1 to 1 - 1 to 10, and heat preservation is performed for 1 to 48 hours under the temperature of 40 to 100 DEG C; thirdly, mixture is filtered, cleaned by utilization of ethanol and dried for 1 to 36 hours in the air; fourthly, the mixture is dried for 1 to 72 hours under vacuum state of 50 to 250 DEG C; fifthly, the mixture is crushed in a ball mill and passes through a 100 to 400 mesh sieve, and then a ferric fluoride product is obtained. The invention has the advantages that: firstly, systematic temperature is automatically controlled, and technological parameters are determined through precise calculation on the basis; secondly, yield of the method is high and product purity is larger than 95 percent. Obtained FeF3 (H2O) 0.33 has an integrated orthorhombic system structure, regular surface topography, small grain diameter and uniform distribution, and good discharge performance. The method is a novel and practical technological line for preparation of the FeF3 (H2O) 0.33.

The invention discloses a method for preparing hydrogen fluoride from flousper powder and sulfuric acid. The method comprises the following specific steps of: adding solution of sulfuric acid and the flousper powder into a reactor with a stirrer respectively, wherein the molar ratio of calcium fluoride to the sulfuric acid is 1:3-1:30, the granularity of the flousper powder is 280 to 1,220 meshes, and the reaction temperature is controlled to between 90 and 300 DEG C; generating hydrogen fluoride gas and calcium sulfate solid after the reaction; purifying, condensing and rectifying the hydrogen fluoride gas to obtain anhydrous hydrogen fluoride, or purifying and absorbing the hydrogen fluoride gas to obtain hydrofluoric acid; transferring the calcium sulfate solid and the sulfuric acid toa filtering system from the reactor to perform solid-liquid separation; returning the separated solution of sulfuric acid to the reactor; and washing and drying the calcium sulfate solid separated from the sulfuric acid to form a by-product. The method has the advantages of simple equipment, high reaction efficiency, low cost and easy industrialized production.