42results about How to "Reduce the synthesis reaction temperature" patented technology

The invention relates to a method for preparing a SnIn4S photocatalyst through a low-temperature coprecipitation method. The method is characterized by comprising the following steps: using soluble tin salt as a tin source, soluble indium salt as an indium source, thiourea or thioacetamide as a sulfur source, and methanol, ethanol, propanol and glycol as solvents, performing condensing refluxing at 60-90 DEG C, stirring at a constant speed, and reacting for 3-7 hours; cooling to room temperature, performing suction filtration on a sample, rinsing with deionized water and ethanol for three times, drying the obtained sample for 6-24 hours at 80-120 DEG C to obtain the SnIn4S photocatalyst with relatively higher activity. The SnIn4S photocatalyst can effectively degrade methyl orange, rhodamine B and other organic pollutants in visible light and reduce some heavy metal ions; the method has the significant advantages of simpleness, easiness, low reaction temperature, low energy consumption, short response time and high yield; the product of SnIn4S has very high photocatalytic performance.

The invention relates to a method for producing nano-sized vanadium carbide powder, belonging to the technical field of preparing ceramic powder. The method comprises the following processes: (1) mixing a vanadium source, a carbon source and an auxiliary into a solution according to a certain proportion; (2) heating the solution, so that the solution is volatilized, concentrated and decomposed to obtain precursor powder containing the vanadium source and the carbon source; and (3) reacting the precursor powder for 1-5 hours at the temperature of 700-1300 DEG C under certain atmosphere. The method is simple in technology, low in cost, and easy to industrialize, and the obtained vanadium carbide powder has a particle size of less than 50nm, and good dispersity.

The invention relates to a method for preparing a high heat-resistant polybutene-1 composite pipe material for transporting high-temperature fluids, which belongs to the technical field of polymer materials, and specifically includes adding cellulose powder into a sulfuric acid solution, stirring vigorously for 5-10 minutes, After stirring, filter with suction and wash with water until neutral; then dissolve the solid powder of bis[4-(1,1-dimethylethylbenzoyl-oxygen)]aluminum hydroxide in the organic Add the above solution to the obtained solid, raise the temperature of the mixture to 100°C-130°C, stir and react for 4-8 hours, after the reaction, filter the white powder in the solution, wash it with water, and dry it. That is, the special additive for polybutene-1 is obtained; finally, the polybutene-1 resin and the special additive for polybutene-1 are uniformly mixed in a high-speed mixer, and are formed through extrusion, granulation, injection molding and other steps to obtain High heat-resistant polybutene-1 composite pipe material; the polybutene-1 composite pipe material prepared by the invention can form a stable crystal form and has a heat distortion temperature as high as 136°C.