150results about How to "Synthetic operation is simple" patented technology

The invention relates to a synthesis method for a visible photocatalyst by modifying titanium dioxide (TiO2) by using ammonium fluoride (NH4F). The synthesis method comprises three steps of: preparing a mesocellular foam silica (MCF) molecular sieve, preparing an MCF carrying TiO2 catalyst and modifying MCF / TiO2 by using the NH4F. Compared with the prior art, the carrying catalyst MCF / TiO2 is subjected to NH4F hydrophobic modification through a hydrothermal process and a low-temperature vacuum activation method; as a mesoporous material has extremely high absorption capability, the visible photocatalyst has outstanding absorption performance and catalyzing and degrading performance on ultraviolet and visible light of high-concentration organic pollutants during degrading of organic compounds, such as rhodamine B and the like; furthermore, during hydrophobic modification, if isopropyl alcohol is found to be a solvent, the NH4F hydrophobic modification effect of the prepared catalyst isthe optimal and the hydrophobic stability is quite good; moreover, the synthesis method is simple in operation and low in cost, and the raw materials are easily obtainable.

The invention relates to new benzocyclobutane, a preparation method thereof and application thereof. The invention provides a new preparation method for (1S)-4, 5-dimethoxy-1-(methyl-amino-methyl)-benzocyclobutane serving as a key intermediate of ivabradine hydrochloride and addition salt thereof, and meanwhile provides a new benzocyclobutane compound which is an intermediate for preparing the (1S)-4, 5-dimethoxy-1-(methyl-amino-methyl)-benzocyclobutane. In addition, the invention also provides a method for preparing the new benzocyclobutane compound, and meanwhile provides a method for splitting an intermediate product during preparing the new benzocyclobutane compound.

The invention discloses surface imprinting chitosan microspheres for efficiently selecting heavy-metal ions and a preparation method for the surface imprinting chitosan microspheres and belongs to the field of adsorbent synthesis. The preparation method comprises the steps of carrying out carboxylation modification on chitosan by adopting sodium chloroacetate so as to obtain electronegative carboxylated chitosan microspheres, then, carrying out surface adsorption by using a pre-assembled complex of polyethyleneimine and the heavy-metal ions, then, fixing imprinted sites by using epoxy chloropropane as a cross-linking agent, finally, eluting the heavy-metal ions by adopting an ethylenediamine tetraacetic acid solution, and carrying out freeze-drying, thereby obtaining the surface imprinting chitosan microspheres. The surface imprinting chitosan microspheres are simple in synthesis process, low in preparing cost and stable in surface imprinting hole spatial-configuration, thereby having a specific recognition function on template heavy-metal ions, and the high-selectively separated removal and resource recovery of the heavy-metal ions from wastewater can be realized, so that environmental and economic benefits are remarkable.

The invention discloses a sulfonated polybenzimidazole proton exchange membrane with the general molecular formula defined in the description, wherein polymer is random copolymer; n is greater than 0and smaller than or equal to 0.8; m is greater than or equal to 0.2 and smaller than 1; m+n is equal to 1; and the weight-average molecular weigh of the polymer is 5000-800000. The sulfonated polybenzimidazole proton exchange membrane has the advantage of high proton conduction rate.

The invention relates to a gasoline selective hydrogenation desulfurization catalyst, and a preparation method and application of the catalyst. The carrier of the catalyst is gamma-Al2O3 obtained through hydrothermal treatment, the specific surface area of the carrier is in a range of 70-140 m<2> / g, the pore volume of the carrier is in a range of 0.35-0.50 ml / g, and the active components of the carrier are cobalt and molybdenum. The preparation method of the catalyst comprises the following steps: performing hydrothermal treatment at a certain temperature on the gamma-Al2O3 obtained by roasting pseudo-boehmite; performing drying and roasting for re-dehydration to obtain a new gamma-Al2O3 carrier; performing dipping by using the active components molybdenum and cobalt, and performing dryingand roasting to obtain the catalyst. The catalyst provided by the invention has good gasoline hydrogenation desulfurization selectivity, the liquid yield is high (nearly 100%). the octane number lossis low (when the whole-fraction FCC gasoline is directly treated, and the content of the product S is about 10 ppm, the octane number loss is 2.1-2.3 units), and the catalyst has the advantages of simple preparation, low cost and the like.

The invention discloses a device and a method for generating person photograph materials. The device comprises terminal equipment. The terminal equipment comprises a photograph collection unit used for collecting person photographs from a local photograph album; a head portrait cut-out unit used for cutting out head portraits of person photographs collected by the photograph collection unit; a random ordering unit used for respectively and randomly mixing the head portrait images cut out by the head portrait cut-out unit and the head portrait cut-out photographs; a synthesis unit used for randomly combining the head portrait images with the e head portrait cut-out photographs and generating new photographs; and a storage unit used for storing the new photographs generated by the synthesis unit. According to the invention, the recombination of person photograph materials is realized through the simple terminal equipment, and more person photograph materials are formed.

The invention belongs to the field of chemical synthesis, relates to a method for preparation of glycopyrronium bromide, and especially relates to enriched high-purity (3R, 2'S,) and (3S, 2'R,) glycopyrronium bromide and a preparation method of a novel intermediate involved in the synthesis method of glycopyrronium bromide. The method provided by the invention overcomes the defect that the prior art has a low yield and can produce large pollution, can realize preparation of glycopyrronium bromide shown in the formula I, has a high yield, produces low environmental pollution and is convenient for purification. Glycopyrronium bromide obtained by the method has a melting point of 195 to 198 DEG C.

The invention discloses a novel process for synthesizing Donepezil by using diethyl malonate as the starting raw material, which comprises condensation, reduction, substitution, cycling reaction and decarboxylation.

The invention in particular relates to a double-layer walled microporous self-assembled material with a fluorescent recognition effect and a preparation method thereof, which belong to the technical field of advanced porous materials. According to the invention, by using rigid dicarboxylic acid or rigid azacyclo organic ligands as a supporting wall of a microporous material and using a metal ion with a multi-ligand-field geometry configuration as a central metal, the microporous self-assembled material with a double-layer organic wall is prepared through a solvent hot self-assembled growth method. A porous channel of the prepared microporous self-assembled material with the double-layer organic wall has a size of 5-20 angstroms and is a three-dimensional interconnected porous channel. The microporous self-assembled material provided by the invention has the advantage of characteristic fluorescence; and the fluorescence is weakened and obviously red-shifted when the microporous self-assembled material meets nitrobenzene explosive compounds, so that a recognition purpose is achieved. The double-layer walled microporous self-assembled material with the fluorescent recognition effect, provided by the invention, has the advantages of simple synthesis method and strong controllability and has broad application prospects in inspection and detection aspects of the nitrobenzene explosive compounds.

The invention discloses a synthesis method of a cyclic dipeptide. A cyclic dipeptide sequence contains L-asparagine or L-glutamine. The method comprises the following steps: by taking 2-Chlorotrityl Chloride Resin as a carrier, carrying out solid-phase synthesis to obtain a straight-chain dipeptide fragment H-Glu-AA-OH or H-Asp-AAOH, wherein AA is other alpha-amino acids except asparagine, glutamine, glutamic acid, aspartic acid and cysteine; then carrying out a methyl esterification reaction to obtain straight-chain dimethyl ester protected dipeptide H-Glu (OMe) -AA-OMe or H-Asp (OMe)- AA-OMe; then carrying out water-phase alkaline cyclization to obtain cyclic dipeptide Cyclo[ Glu (OMe)- AA] or Cyclo[ Asp (OMe)- AA] protected by side chain carboxyl methyl ester; and finally, carrying outammonolysis to obtain the cyclic dipeptide containing glutamine or asparagine. The method is simple in synthesis process and safe to operate, incomplete cyclization caused by steric hindrance of aminoacid side chain protecting groups in the cyclization process is effectively avoided, few byproducts are produced, purification is easy, and cyclic dipeptide containing Gln and Asn can be synthesizedin batches.