35results about How to "Moderate boiling point" patented technology

The invention relates to a nanometer conductive silver paste and a preparing method thereof. The nanometer conductive silver paste is characterized in that mass percentage content of the components are as follows: 20-90% of a silver powder, 0.01-5% of a high-molecular resin, 0.01-5% of an organic silicone oil, 0.01-10% of a thickening agent 1, 0.01-5% of a thickening agent 2, 0.01-5% of a plasticizer, 0.5-1% of a dispersant, 0.5-1% of a leveling agent, 5-20% of a solvent 1, and 5-20% of a solvent 2. The nanometer conductive silver paste of the invention has a remarkable low-temperature sintering property and saves energy. A formed circuit has advantages of high conductivity, high adhesiveness and high hardness. A selected Teslin substrate is degradable and environment-friendly. The nanometer conductive silver paste has wide application prospect in paste application fields of RFID electronic label, LED circuit board, touch screen circuit, etc.

The present inventions are (A) a solvent comprising at least one cycloalkyl alkyl ether (1) represented by the general formula: R1-O-R2 (wherein R1 is cyclopentyl or the like; and R2 is C1-10 alkyl or the like); (B) a method of preparations the ethers (1) characterized by reacting an alicyclic olefin with an alcohol in the presence of an acid ion-exchange resin having a water content of 5 wt % or less. The solvent is useful as cleaning solvent for electronic components, precision machinery components or the like, reaction solvent using various chemical reactions, extraction solvent for extracting objective organic substances, solvent or remover for electronic and electrical materials, and so on. The process enables industrially advantageous production of the objective cycloalkyl alkyl ethers (1).

The invention provides zinc oxide-based nanoparticle ink. The zinc oxide-based nanoparticle ink comprises a solvent and zinc oxide-based nanoparticles uniformly dispersed in the solvent. The zinc oxide-based nanoparticle ink comprises, by mass, 0.01 to 20.00% of the zinc oxide-based nanoparticles and 80.00 to 99.99% of the solvent. The zinc oxide-based nanoparticle ink is characterized in that the solvent comprises at least one alcohol ether ester compound. The zinc oxide-based nanoparticle ink can solve the problem that the existing zinc oxide-based nanoparticle ink is not suitable for ink-jet printing and has poor film-forming quality. The invention provides an electroluminescent device. An electron transport layer of the device is prepared from the zinc oxide-based nanoparticle ink through ink-jet printing.

Provided is a selenium precursor liquid which is achieved by the preparation of heating and dissolving the elemental selenium in oleoyl morpholine under the protection of inert gas. The process for the preparation of cadmium selenide or zinc selenide quantum dots with the selenium precursor liquid is to generate pyrolytic reaction by stirring and mixing the selenium precursor liquid and fatty acid cadmium or fatty acid zincum precursor liquid under the protection of inert gas at a temperature of 150 DEG C to 330 DEG C, and the last is to separate and purify the mixture with low carbon alcohols. The dissolving capacity of the oleoyl morpholine for the elemental selenium is strong, the compatibility of the oleoyl morpholine with other green common solvents is perfect, which can increase the volume productivity of selenide nanocrystalline, thereby achieving quantum dots with relatively narrower size and higher quality.

The invention provides a refinement method for hydrochloric acid cyclobenzaprine, which is safer and more reliable, and can increase the productive efficiency. The refinement method of the hydrochloric acid cyclobenzaprine is as follows: firstly, coarse products of 5- (3- dlmethyl ammonium)- dibenzanthracene (a,d) cycloheptatriene-5-alcohol(cyclobenzaprine intermediate) are dissolved in hydrochloric acids with the concentration of between 1 and 37 percent and heated at a temperature of between 50 and 95 DEG C for 1 to 5 hours, and added in with sodium hydroxide(or other sodium salts) for neutralization so as to make a solution become basic; secondly, an aether/ethyl acetate mixed solution is used for extraction, and the organic layer is filled with dried hydrochloric acid gases for 1 to 5 hours, and coarse products of cyclobenzaprine hydrochloride are separated out; thirdly, coarse products of cyclobenzaprine hydrochloride are recrystallized by absolute isopropanol, and the use level is that each 10g of coarse products is mixed with 30 to 100ml of absolute isopropanol, and the coarse products are filtered, and filter cakes are washed to be nearly white by using acetone, aether or tetrahydrofuran, and coarse products filtered are dried to obtain finished products of cyclobenzaprine hydrochloride, and the content of hydrochloric acid cyclobenzaprine is more than 99.8 percent.

The invention relates to an azithromycin new crystal-form compound and a preparation method thereof, belonging to the technical field of medicine. According to the azithromycin new crystal-form compound provided by the invention, an X-ray powder diffraction diagram has characteristic peaks at the positions that the reflection angle 2theta is 3.8+/-0.2 degrees, 15.4+/-0.2 degrees, 17.2+/-0.2 degrees, 18.7+/-0.2 degrees, 20.1+/-0.2 degrees and 23.2+/-0.2 degrees. The azithromycin new crystal-form compound provided by the invention is subjected to a stability test under the conditions that the temperature is 40+/-2 DEG C and the relative humidity is 75+/-5 percent. The test result shows that the content of each related substance of the azithromycin new crystal-form compound provided by the invention is not changed obviously, and excellent quality stability is achieved. The repose angle measuring result shows that the azithromycin new crystal-form compound has excellent fluidity and is more suitable for medicine preparation and long-time storage.

The invention discloses a benzylation method for monosaccharide glucoside. The method includes the steps of sequentially adding monosaccharide glucoside, sodium hydride, methylbenzene and benzyl chloride to a reactor, raising the temperature to the reaction temperature of 60-130 DEG C, preserving heat till the reaction is completed, and conducting postprocessing on reaction liquid after the reaction ends to prepare a benzylation product of monosaccharide glucoside, wherein the benzylation product of monosaccharide glucoside is a product generated by conducting benzylation on all hydroxide radicals -OH on monosaccharide glucoside to generate -O-Bn, and Bn represents benzyl groups. Reaction solvent and extraction solvent are both methylbenzene, the postprocessing operation is simplified, the byproduct methylbenzene in the reaction process is consistent with the reaction solvent, recycled methylbenzene can be directly used as reaction solvent for the next batch without water removal, and the aims of simplifying operation, reducing sodium hydride and benzyl chloride unit consumption, effectively reducing generation of byproduct dibenzyl ether and reducing pollution are achieved.

The invention relates to a tobacco shred immersion method and a device; the method comprises: (1) the tobacco shred is arranged in a pre-heating immersion device and then vacuumizing is carried out; (2) swelling agent with liquid state is sprayed on the tobacco shred; (3) swelling agent with gas state is filled in the immersion device; (4) immersion is carried out. The immersion device provided by the invention comprises a tank body, an upper tank cover, a lower tank cover and a hydraulic pressure opening device, a spraying device is arranged in the upper tank cover, wherein the tank body is provided with two layers of sleeves, a screen cloth is formed on the inner wall of the inner layer sleeve, and the pore diameter of the screen cloth is 1.5mm. The invention has simple structure and convenient operation, can achieve good immersion effect to the tobacco shred and can realize continuous immersion of the tobacco shred.

The invention belongs to the field of natural organic chemistry, and relates to a method for enzymatically extracting high-purity resveratrol from Daxinganling wild blueberries. The invention uses the blueberry fruit picked in Daxing'an Mountains as a raw material, and obtains a high-purity resveratrol crystal powder product through a simplified process of biological enzymolysis reaction, water extraction, alcohol precipitation, deep extraction, separation, concentration and drying. The method of the invention has the characteristics of sufficient biological enzymolysis, short time consumption, low energy consumption cost, high operation safety, full use of raw materials and organic solvents, waste liquid mainly being water, good for environmental protection, and easy industrialization and application. The resveratrol crystal powder product prepared by the method of the invention has a high purity, which can reach more than 98 percent; and a high yield, which can reach 1.40 percent.