10 results about "Nitrate" patented technology

A method of selection for type II methanotrophs is provided that includes enriching a microbial feedstock using a non-sterile bioreactor with a methane source and a nitrogen source, where the microbial feedstock includes a mixture of Type I and Type II methanotrophic cells, where an inhibited growth of the Type I methanotrophic cells and an enhanced growth of the Type II methanotrophic cells forms. The method further includes exposing intermittently the enriched microbial feedstock to i) nitrate, ii) urea, or i) and ii), where enhanced growth of the Type II methanotrophs is established, and exposing the Type II methanotrophs to an unbalanced growth condition where production of polyhydroxybutyrate is induced.

This invention relates to a method for preparing nanoscale perovskite-type LaCoO3 by stearic acid gel combustion. The method comprises: (1) weighing lanthanum nitrate, cobalt nitrate and stearic acid at a mol ratio of 1 : 1 : (9.5-12.0); (2) heating in an oil bath, dissolving stearic acid, adding lanthanum nitrate and cobalt nitrate, magnetically stirring at 110-120 deg.C and reacting to obtain a gel; (3) combusting at 450 deg.C in a muffle furnace, taking out the product, milling and torrefying at 850 deg.C for 3 h in the muffle furnace to obtain 10-35 nm perovskite-type LaCoO3. The method is simple and suitable for mass production.

A basic metal nitrate suitable as an oxidizing agent for a gas generating agent, which is a basic metal nitrate having a good thermal stability and meeting at least one requirement of the following (a) to (d): (a) a particle diameter of 0.5 to 40 μm; (b) a degree of crystallinity having 0.4 deg or less of a half band width of the peak in the X-ray analysis; (c) an initiation temperature of weight loss being 220° C. or higher according to TG-DTA analysis; and (d) an impurity content of 1,000 ppm or less based on Na atom. Also, a gas generating composition which has a low toxicity, a high burning rate, and a low combustion temperature and which is used in a gas generator for an air bag. The gas generating composition comprises (a) tetrazole derivatives, guanidine derivatives or a mixture thereof, (b) a basic metal nitrate, and (c) a binder and/or a slag-forming agent.

The invention discloses an efficient total-nutrient chelate fertilizer and a preparation method of the efficient total-nutrient chelate fertilizer, and belongs to the technical field of crop fertilizers. The efficient total-nutrient chelate fertilizer is prepared from the following raw materials by weight: 650-750 parts of urea, 800-100 parts of monopotassium phosphate, 80-120 parts of potassium humate, 75-85 parts of calcium chloride, 55-65 parts of magnesium sulfate, 18-22 parts of ferrous sulfate, 20-25 parts of manganese sulfate, 20-25 parts of copper sulfate, 20-25 parts of zinc sulfate,2-4 parts of ammonium molybdate, 40-60 parts of citric acid, 50-60 parts of tartaric acid, 90-110 parts of EDTA, 35-45 parts of boric acid, 15-20 parts of lanthanum nitrate, 25-30 parts of cerous nitrate, and 30-40 parts of a surfactant. The monopotassium phosphate, the compound trace element and the rare earth element chelate are compounded, the trace element and the rare earth element exist in the non-precipitate inorganic form, and the defect that the traditional micro element fertilizer cannot be compounded with the phosphate is overcome.

The invention discloses a fuel oil additive mixture, which is composed of the following formula components by mass percentage: 20-50 parts of triethylamine, 30-50 parts of ethylene glycol, 30-50 parts of ethylenediamine, 15-50 parts of acetone, 20-40 parts of ethyl acetate, 30-40 parts of isooctyl nitrate, 20-40 parts of nano-iron oxide, 30-50 parts of glyceryl monooleate, 10-30 parts of palmitic acid, 5-10 parts of carbon tetrachloride, and 10-30 parts of propylene dichloride. The fuel oil additive mixture provided by the invention can clear carbon deposit, clean the fuel oil system, enhance the power performance, improve atomization, save fuel oil, prevent corrosion, prevent rust and lubricate, protect the engine, reduce noise, reduce wear, prolong the engine life, eliminate black smoke, and lower emission.