53results about How to "Short synthesis process" patented technology

The invention discloses a preparation method of phthaloyl azo dye, which comprises the following steps of: mixing N-alkyl-4-nitrol-phthalimide with nitrobenzene compounds according to equal molar ratio, adding the mixture into alkali-containing solvent, feeding hydrogen into the solvent under the existence of catalyst, and conducting reaction for 4-24h at room temperature being approximately 98DEG C under low pressure or normal pressure to directly prepare the phthaloyl azo dye. Compared with the existing disclosed technique, the method provided by the invention has the advantages that the synthesis process flow is short and the defects of classic synthesis method of diazotization-coupling are avoided; the safety is high and only low-pressure or normal-pressure catalytic hydrogenation for coupling is needed; the energy consumption is low and the reaction is conducted at room temperature being approximately 98DEG C; the separation and the purification are simple to conduct and the intermediates are not needed to be purified or separated by using a great quantity of solvent; the quantity of the discharged sewage is less and the secondary environmental pollution is avoided.

The invention discloses a cobalt-nickel double-metal organic framework carbon dioxide adsorption material as well as a preparation method and application thereof. The preparation method comprises thefollowing steps: dissolving a nickel salt and a cobalt salt into water so as to obtain a solution A; dissolving 2,5-dyhydroxy terephthalic acid into a solution with ethanol and N,N-dimethyl formamideso as to obtain a solution B; and uniformly mixing the solution A with the solution B so as to obtain a mixed solution, and performing a heating reaction on the mixed solution in a microwave-ultraviolet-ultrasonic wave three-into-one synthesis reaction instrument, and performing activation treatment under a vacuum condition, so as to obtain the double-metal organic framework carbon dioxide adsorption material. The material has the a uniform, regular and dispersed microtopography, a large specific surface area, a large micropore capacity and a very large CO2 adsorption capacity, and in addition, is simple in preparation process, mild in adsorption condition, large in adsorption capacity, good in selectivity and possible in repeated use.

The invention discloses an image layer processing method for the image layer processing device and for processing multiple image layers. The image layer processing device comprises an image processor and a first image layer processing circuit; the multiple image layers at least comprise a first image layer, a second image layer, a third image layer and a fourth image layer; the image layer processing method comprises steps of comparing the updating rate of the first image layer with the updating rate of the second image layer, using a first image layer processing circuit to process the first image layer when the updating rate of the first image layer is greater than the updating rate of the second image layer, using the image processor to perform synthetic processing on the second image layer, the third image layer and the fourth image layer; using the first image layer processing circuit to process the second image layer and using the image layer processor to perform the synthetic processing on the first image layer, the third image layer and the fourth image layer when the updating rate of the second image layer is greater than that of the first image layer. The image layer processing method and device also discloses an image layer processing device. Through above arrangement, the method and the device can alleviate the working load the image processor, improve the image display frame rate and enable the image to be displayed smoothly.

The invention discloses a method for synthesizing a citric acid ester type compound, which belongs to the technical field of chemical synthesis. The method comprises the following steps of: using citric acid and fatty alcohol as main raw materials, and using benzene sulfonic acid or amino benzene sulfonic acid as a catalyst; and performing esterification and the purification processes of acetylation, neutralization, washing, drying, distillation and the like. The catalyst has rich sources, a low cost and high activity, can be separated from an esterification liquid easily after the neutralization, is coke-free during the distillation, has less corrosion to equipment, and is safe and environment-friendly; the water generated by the esterification is separated out by adopting a binary heterogeneous separation technique, and no water separating agent is additionally added; and acetyl citric acid ester is produced by adopting an esterification-acetylation continuous synthesis method, the flow is greatly simplified, and a synthesis process is shortened. The citric acid ester prepared by the method has the advantages of high quality, high purity, low degree of color and wide applicationrange.

The invention belongs to the technical field of medicine, and relates to a method for easily and efficiently synthesizing n-butylphthalide. The method particularly comprises the following steps that in the presence of a copper iodide catalyst, o-cyanobenzaldehyde is reacted with a Grignard reagent of n-butyl bromide in solvent; hydrochloric acid is added for a reaction after the reaction in the first step is completed, standing layering is conducted, and an organic phase is obtained; the organic phase is washed through an aqueous hydrochloric acid solution, a sodium hydroxide aqueous solution is added, reflux is conducted through heating, standing layering is conducted after reflux is completed, and an aqueous phase is obtained; pH of the aqueous phase is adjusted to 3-4, a reaction is conducted through heating, solvent extraction is conducted after the reaction is completed, concentration and vacuum distillation are conducted on an obtained oil phase, and a finished product is obtained. According to the method for easily and efficiently synthesizing the n-butylphthalide, the raw materials are easy to obtain, the yield is high, the cost is low, industrialization is easy, the n-butylphthalide with the content of any individual impurity smaller than 0.1 percent can be obtained, and the purity is larger than 99.7 percent.