6 results about "Increase temperature" patented technology

The invention relates to a preparation method of diphenyl ether dianhydride and isomers thereof, which is characterized in that the preparation method comprises the following steps of: adding solvent and monochlorophthalic anhydride into a reactor with a drying and distilling device, increasing temperature for reflux for a certain period under the protection of N2, adding alkali metal salt and catalysts, conducting reflux reaction for a certain period, decreasing the temperature, conducting filtration to obtain crude products, adding cyanophenyl and the crude products prepared through the reaction into the clean reactor with the drying and distilling device, increasing the temperature for reflux for a certain period under the protection of N2, decreasing the temperature, conducting filtration and drying to obtain the diphenyl ether dianhydride and the isomers thereof. The preparation method provided by the invention has the advantages that the synthesis method of the diphenyl ether dianhydride is widened, the preparation process of the diphenyl ether dianhydride is simplified, the environmental pollution is reduced and a new method is provided for the industrial production of the diphenyl ether dianhydride.

Present example embodiments relate generally to methods of fabricating a semiconductor device, and semiconductor devices thereof, comprising providing a substrate, forming an insulating base layer on the substrate, and disposing a conductive layer on the insulating base layer at an initial temperature. The methods further comprise increasing the initial temperature at a first increase rate to a first increased temperature and performing an in-situ annealing process to the conductive layer at the first increased temperature. The methods further comprise increasing the first increased temperature at a second increase rate to a second increased temperature, and forming an insulating layer after performing the in-situ annealing process at the second increased temperature.

The invention relates to an acetylated Morinda officinalis water extract, and a preparation method and an application thereof and belongs to the technical field of preparation of antidepressant drugs. The invention providing the acetylated Morinda officinalis water extract, which is prepared through the steps of: mixing 30 g of a dried Morinda officinalis water extract, 200 ml of acetic anhydride and 2 g of amino-sulfonic acid, performing a reaction at 10-30 DEG C for 30 min, increasing temperature to 60-90 DEG C and performing a reaction for 20 min. The acetylated Morinda officinalis water extract is high in antidepressant activity and can be applied to preparation of the antidepressant drugs.

The invention relates to a polypropylene grass and cold prevention fabric, a preparation method thereof and an application of the fabric. The method includes the steps: mixing mica and urea, adding deionized water to ultrasonically disperse mixture, adding sodium stannate and zinc sulfate water solution, and filtering, drying and calcining mixture to obtain a zinc sulfide-mica-based flame retardant; mixing the polypropylene, nucleating agents, antioxidants, dispersing agents and the zinc sulfide-mica-based flame retardant, extruding and granulating mixture, heating the mixture to reach the temperature of 130-180 DEG C, and extruding, cooling and drawing the mixture by a spinneret plate to obtain primary spun fibers; heating the primary spun fibers, drawing the heated primary spun fibers tobe aggregated into a net, bonding the net to form the fabric to obtain the polypropylene grass and cold prevention fabric. The polypropylene grass and cold prevention fabric has various physiologicaland ecological effects of breathability, increasing temperature, preserving soil moisture, avoiding tillage, increasing fertility, preventing and decreasing pests and diseases and the like and has the advantages that water is saved, electricity, labor and fertilize consumption is reduced, the control cost of the pests and diseases is reduced and the like.