38results about How to "Reduce synthesis energy consumption" patented technology

The invention provides a method for preparing a titanium silicon molecular sieve TS-1 with high framework titanium content. The method particularly comprises the following steps: mixing a silicon source and a titanium source according to the proportion, and adding an aqueous solution of quaternary ammonium base to obtain mixed liquid; hydrolyzing the mixed liquid to remove alcohol, adding a starch solution and performing crystallization to obtain a crystallization product; and drying and roasting the crystallization product to obtain the titanium silicon molecular sieve TS-1 with high framework titanium content. According to the method, the starch solution is added in the synthesis process, the silicon source is in bridge connection with the titanium source by utilizing a large amount of hydroxyl groups in the starch, and the silicon source and the titanium source are easy to combine, so that more titanium can enter the TS-1 framework. The titanium silicon molecular sieve prepared with the method has high titanium content and hardly contains extra-framework titanium, and mother liquid can be recycled.

The invention provides a preparation method of sodium vanadium fluorophosphate. The preparation method comprises the steps that a low-cost pentavalent inorganic vanadium source is adopted, the vanadium source, a phosphate radical source and an organic reducing agent are mixed under normal temperature and pressure, and then a spray pyrolysis method is adopted to prepare and obtain a vanadium phosphate intermediate at a low temperature and within a short period of time; and the vanadium phosphate intermediate is further mixed with a sodium source and a fluorine source in a solid phase mode, andthe sodium vanadium fluorophosphate with good crystallinity is synthesized through calcining at a low temperature and in a short period of time. The obtained sodium vanadium fluorophosphate has a spherical shape and part of the sodium vanadium fluorophosphate is in the hollow sphere form, and the particle size is small. The vanadium phosphate intermediate is prepared by the spray pyrolysis methodin the preparation process, the process flow is short, the process is simple, the productivity is large, and the production efficiency is high.

The invention provides a preparation method of bisbenzylisoquinoline compounds. The method comprises the following steps: taking a formula (A) and RX as reactants and carrying out a reaction in a reactor in the presence of ionic liquid or assistants; detecting the reaction progress by chromatography; after the reaction ends, separating and purifying or further adding acid and neutralizing to neutral; then separating and purifying to obtain the bisbenzylisoquinoline compound (The formula is shown in the specification). The method has the advantages of simplicity, environmental protection, highefficiency, as well as high yield which is 90 percent or above, is up to 98 percent or above and is far higher than the yield of a traditional solvent method (20 to 80 percent).

The invention discloses a lithium manganate composite material and a preparation method thereof. The preparation method has the following advantages: 1) a natural lithium-bearing brine resource is comprehensively utilized as a lithium source, the usage amount of a refined lithium salt is reduced, and the material synthesis cost is substantially reduced; 2) the lithium source and a manganate source are uniformly distributed on an atomic level by an ion exchange method, a lattice matrix is easy to rearrange through short-range diffusion, the energy consumption is low during the synthesis process, a relatively low synthesis temperature and relatively short synthesis time are obtained, the grain distribution is uniform, and the polarization is reduced; 3) the constituent contents of lithium and magnesium are reasonably controlled by adjusting a pH value, lithium magnesium-doped type lithium manganate is prepared, the average valence state of manganate during the charge-discharge process is improved, a Jahn-Teller effect is effectively inhibited, and the cycle stability is improved; and 4) from the aspect of economic and environmental protection, the preparation method has more advantages than other schemes, and particularly, the preparation method has practical significance to extract lithium from a liquid-state lithium-bearing brine resource with a high magnesium-lithium ratio to synthesize a composite battery material.

The invention discloses a doped nano pigment YAl 1‑ x m x o 3 The preparation method of (M=Fe, Co, Cu) comprises the following steps: 1) at normal temperature, get deionized water and stir on a magnetic stirrer, according to the molar ratio of Y, Al, and Fe, appropriate ferric nitrate, nitric acid Aluminum and yttrium nitrate are completely dissolved in deionized water successively, and after the above raw materials are completely dissolved, succinic acid is added as a stabilizer to obtain solution A; pH value, to obtain solution B, and then add 1,2-propylene glycol to solution B to obtain a mixed solution; 3) Stir the mixed solution obtained in step 2) on a 60°C constant temperature magnetic stirrer for 2h until the solution becomes condensed glue, then dried, ground, and calcined to obtain solid powder. The preparation method of the invention is green and pollution-free, and the obtained product has the advantages of good dispersibility, low energy consumption, uniform particles, environmental friendliness, low synthesis temperature, simple and controllable process, and is suitable for large-scale production.

The invention discloses a method for synthesizing 2-halogenated nicotinic acid ester and intermediates thereof through microwave method. The method comprises the following steps: adding substitute amino acrolein, a catalyst and cyan-acetic ester into a reactor, carrying out reaction under microwave radiation, and tracking the reaction till substitute amino acrolein disappears to prepare and obtain reaction liquid of the intermediates of 2-halogenated nicotinic acid ester; adding hydrogen halide into the reaction liquid, continuously carrying out reaction, and tracking and monitoring the reaction till the reaction is complete; adding alkali liquor into the reaction liquid to adjust the pH value to 5-6; carrying out standing delamination to obtain an aqueous layer and an organic layer; extracting the aqueous layer with an organic solvent, combining the extracted aqueous layer with the organic layer, and carrying out refinement to prepare and obtain 2-halogenated nicotinic acid ester. The synthesis method of 2-halogenated nicotinic acid ester related to the invention has the advantages of beingenvironment-friendly, short in reaction time, simple to operate, high in product yield and good in quality.

The invention relates to a continuous reaction process of polyamide. The continuous reaction by using a reaction device comprises the following steps: 1) introducing a heating medium into a shell passof a heating system; 2) enabling the polymerization raw material to pass through a preheating system and a light component removal system, discharging the polymerization raw material into a tube passof a heating system, heating the raw material to 200-250 DEG C until the water content in the polymerization raw material is reduced to be less than or equal to 20%, and carrying out a pre-polymerization reaction; 3) discharging a material obtained by prepolymerization into a reaction system, and carrying out a reaction after prepolymerization to generate process steam; 4) feeding the process steam into a light component removal system, heating the polymerization raw material passing through the light component removal system to 180-240 DEG C and feeding the raw material into a shell pass ofa preheating system, and heating the polymerization raw material passing through the preheating system to 180-230 DEG C; 5) condensing the process steam in the shell pass of the preheating system to serve as reflux liquid, and 6) continuously discharging when the viscosity is 150-300 cp to obtain a polyamide prepolymerization product. The reaction process is simple in process and low in synthesiscost, can effectively guarantee the quality stability of polyamide, and is a guarantee for producing high-end polyamide.

The invention discloses a method for synthesizing a presintering hard ferrite material, which takes one or more of oxide or carbonate of ferrite cations and other additives such as CaO, Al2O3 and the like as raw materials, and comprises the following steps: ball milling and tempering, drying, heating by a microwave physical field with the frequency of 300-3,000MHz, raising the temperature to 1,150-1,350 DEG C at the heating-warming speed of 20-80 DEG C / min, and preserving the temperature for 30-180min to obtain the single-phase presintering hard ferrite material with the grain size being about 0.2-2 mu m. Compared with the traditional method for synthesizing presintering materials, the method in the invention has the advantages of short presintering time, low energy consumption, fine and uniform grains of the presintering materials, good moldability and stable magnetic performance, and can be used for preparing sintering bodies by wet compression moulding and dry compression moulding.