11results about How to "Preparation process safety" patented technology

The invention discloses a high-purity organic metal film precursor and a preparation method thereof.The method comprises the steps that under nitrogen protection, metal halide is put into a flask, an ether solvent is injected, and the mixture is cooled to the temperature A; slowly injecting methylmagnesium chloride into the flask within a set time, and controlling the reaction temperature not to exceed the temperature B in the process; after injection is completed, raising the reaction temperature to a temperature C, and stirring and refluxing; after the reflux is completed, cooling the reaction solution to the temperature A again, slowly injecting the prepared Grignard reagent into the reaction solution, and controlling the reaction temperature not to exceed the temperature B in the injection process; after injection is completed, raising the reaction temperature to a temperature C, and stirring and refluxing; after the reaction is ended, separating the magnesium chloride through reduced pressure filtration, and removing the solvent through reduced pressure distillation of filtrate to obtain an organic metal film precursor; the method has the advantages of good safety in the preparation process, high yield, high product purity, high preparation efficiency and the like.

The application discloses a drilling cementing wall stabilizing agent and a preparation method and application process thereof, and belongs to the technical field of oil field chemistry, and particularly relates to a preparation of the drilling cementing wall stabilizing agent. The preparation method of the drilling cementing wall stabilizing agent can be that thermoplastic resin, a curing agent and inorganic powder are uniformly mixed and stirred at normal temperature and normal pressure according to proportions. The wall stabilizing agent material has the advantages of simple production process, safety, low material cost and convenience for large-scale production and application. The product can not only plug pores and reduce filtration loss, but also cement sand and mudstone strata and improve stratum pressure-bearing capacity, so that the purpose of stabilizing a well wall is achieved. The application further provides an application process of the drilling cementing wall stabilizing agent, which comprises a suitable drilling fluid system and an adding amount and construction process under different stratum porosities and different working conditions.

The invention provides a preparation method of a high-uniformity titanium alloy consumable electrode, which comprises the following steps: taking sponge titanium, high-purity metal, intermediate alloy and residual titanium scraps as raw materials, and weighing the raw materials with required weight according to alloy components; the raw materials are sequentially laid on an electrode pressing mold layer by layer according to the particle size from large to small, one-time pressing is carried out after one-time laying and distribution of all the raw materials are completed, and the steps are repeated till an electrode block is formed after multiple times of pressing; and the multiple electrode blocks are subjected to vacuum plasma assembly welding treatment in a vacuum welding box, and the complete consumable electrode is obtained. The raw materials are uniformly laid and distributed layer by layer and then are directly pressed, each electrode block is formed by multiple times of pressing, the pressing direction of the electrode is perpendicular to the melting direction of the electrode in the vacuum consumable melting process, various raw materials on the cross section of the electrode are uniformly distributed during melting, and the raw materials in a molten pool are uniformly distributed in the melting process; and the components of the cast ingot are uniform and stable.

The invention belongs to the field of organic functional molecules and organic polymer functional materials, and particularly relates to a reactive aggregation luminescent flame-retardant organic functional material and a preparation method thereof. A flame-retardant group DOPO is introduced into molecules containing an aggregation-induced emission TPE group, the flame-retardant group DOPO which simultaneously contains the TPE group with aggregation-induced emission performance and a flame-retardant function in the structure is designed and synthesized, and the flame-retardant group DOPO has good flame-retardant performance while the aggregation-induced emission function is guaranteed.

The invention discloses jasmine flower white tea cocktail and a preparation method thereof, and belongs to the technical field of cocktail mixing. The cocktail is prepared from the following raw materials: 40 vol% of white rum with the volume fraction of 10%, a jasmine flower white tea extracting solution with the volume fraction of 30%, a 50g / L sugar source and 100g / L squeezed litchi juice, wherein the sugar source is prepared from jasmine flower honey and white cane sugar according to the mass ratio of 7: 3; according to the cocktail, original jasmine flowers and white tea serve as basic raw materials, the medicinal value and unique flavor of the jasmine flowers and the white tea are effectively combined, the cocktail is rich in crocin and tea polyphenol components, and the ingredients are natural, clean, good in taste, low in alcohol degree, healthy and nutritional.

The invention discloses a preparation method and application of phosphorylated acanthopanax polysaccharide, and belongs to the technical field of biology. The invention discloses a preparation method of phosphorylated acanthopanax senticosus polysaccharide, which comprises the following steps: taking acanthopanax senticosus as a raw material, extracting acanthopanax senticosus polysaccharide ASPS by adopting an ultrasonic-assisted enzyme method, separating and purifying through a DEAE-650M cellulose chromatographic column to obtain ASPS-I, and carrying out structural modification through a phosphate method to obtain the phosphorylated acanthopanax senticosus polysaccharide PASPS-I. The ultrasonic-assisted enzyme method can save the extraction time, reduce the energy consumption and improve the extraction rate of the polysaccharide. The phosphate method is simple and safe in preparation process, few in by-products, free of participation of organic reagents and environment-friendly. The PASPS-I can prolong the life of the CL4176 nematodes, reduce the paralysis rate of the CL4176 nematodes, improve the movement ability of the CL4176 nematodes and improve the anti-stress ability of the CL4176 nematodes.

The invention discloses a nanosheet-assembled porous rod-shaped BiVO4 triangular prism material and a preparation method thereof. Distilled water is used as a solvent to dissolve a mixed solution A of Bi(NO3)3·5H2O and CTAB and an ammonium metavanadate solution B respectively; the mixed solution A is added dropwise while the ammonium metavanadate solution B is vigorously stirred, and the stirring is continued to obtain a uniform reaction precursor mixed solution C; the precursor mixed solution C is transferred into a round-bottom flask and placed in a microwave reactor to be heated to 100° C. by microwave radiation to react; the resultant is cooled, centrifuged, washed and dried to obtain a porous rod-shaped BiVO4 triangular prism material assembled by nanosheets; the unique heating performance of microwave heating, which is fast and uniform and has no temperature gradient, is utilized to realize the synthesis of porous rod-shaped monoclinic BiVO4 triangular prisms without acid or alkali participation, simple operation, rapid controllability and environmental friendliness under the experimental parameters and operations selected by the invention; the obtained crystal product has high purity and good crystallinity and can be used in the field of photocatalysis.

The invention relates to a method for preparing quercetin liposome, which comprises the following steps: (1) adding phospholipid, cholesterol, phospholipid polyethylene glycol and quercetin into ethanol, and dissolving to obtain an ethanol phase solution; (2) respectively pumping the ethanol phase solution obtained in the step (1) and pure water into a micro-fluidic chip from different channel inlets, and carrying out micro-mixing to obtain a quercetin liposome crude product; and (3) dialyzing the quercetin liposome crude product obtained in the step (2) by using an aqueous medium to obtain the quercetin liposome. The method avoids the use of harmful and expensive organic solvents such as trichloromethane and methanol. Compared with the existing preparation technology in the market, the preparation method disclosed by the invention is higher in safety, more environment-friendly, short in time consumption and more advantageous in production cost.

This invention discloses a podophyllotoxin-9-fluorenylmethanol small molecule prodrug nanoparticle, its preparation method, and its applications. The podophyllotoxin-9-fluorenylmethanol small molecule prodrug co-assembled nanoparticles are either polyethylene glycol-modified podophyllotoxin-9-fluorenylmethanol small molecule prodrug co-assembled with gossypol, or podophyllotoxin-9-fluorenylmethanol small molecule prodrug co-assembled with gossypol and loaded with hydrophobic fluorescent substances. The podophyllotoxin-9-fluorenylmethanol small molecule prodrug is prepared by linking podophyllotoxin and its compounds with 9-fluorenylmethanol via disulfide bonds. This invention is the first to construct a carrier-free hybrid nanoassembly of gossypol and PPT oxidation-sensitive prodrug. Gossypol-mediated prodrug co-assembled nanoparticles can be used for precision cancer chemotherapy in tumor treatment, precisely achieving PPT "enhancement," improving the therapeutic efficiency of PPT prodrugs, opening an ultra-low-dose chemotherapy window for PPT, and solving the problems of delayed and insufficient prodrug activation.

The application discloses a SrTiO3-based ceramic with ultrahigh dielectric constant and low dielectric loss, and a chemical composition of the ceramic is Sr 1‑1.5x Gd x TiO3 (0.008≤ x ≤0.014). A preparation method comprises the following steps: according to a stoichiometric formula Sr 1‑1.5x Gd x TiO3, primary ball milling, drying, grinding, briquetting, pre-sintering, obtaining a block B, secondary ball milling, drying, grinding, sieving, pressing a green body, and sintering. 1‑1.5x Gd x The SrTiO3-based ceramic material has ultrahigh dielectric constant ε r (>10 5 ) and low dielectric loss tanδ (<0.05), the preparation process is simple, the material cost is low, the sintering is carried out in a nitrogen environment, the process is safe, and the process is green and environment-friendly.

The present application relates to a kind of deodorization catalysts suitable for vehicle-mounted incineration toilet and its preparation method and use, the preparation method includes the following steps: providing aluminum-based carrier;- copper compound, nickel compound, iron compound and manganese compound are sequentially loaded on the aluminum-based carrier, and the deodorization catalyst is prepared.The deodorization catalyst includes aluminum-based carrier and copper compound, nickel compound, iron compound and manganese compound loaded on the aluminum-based carrier.The deodorization catalyst of the present application is stable in nature, can be mass-produced in industrialized batch, has integrated structure, is suitable for vehicle-mounted scene, can effectively catalyze degradation of substance with irritating odor at lower temperature, realizes the effective removal of odor of excrement combustion tail gas.