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442results about How to "Solve solubility" patented technology

Preparation method and application of polycarboxylate water reducer containing phosphate group

ActiveCN105418857ASolve solubilitySolve the problem of competing esterificationOrganic solventAlcohol
The invention provides a preparation method and application of a polycarboxylate water reducer containing a phosphate group. According to the preparation method, the defects that the structure and the molecular weight of the water reducer cannot be accurately controlled due to the chain transfer action of the phosphate group can be overcome. The preparation method comprises the steps that an unsaturated polyether macromonomer, unsaturated carboxylic ester and unsaturated alcohol are subjected to a copolymerization reaction in organic solvent to obtain a polycarboxylate water reducer pre-polymer; phosphorylated modification is performed on the polycarboxylate water reducer pre-polymer; on the condition that an acid aqueous solution exists, a carboxylic ester group on a product obtained after phosphorylated modification is hydrolyzed, and the organic solvent is removed; neutralization is performed to obtain the polycarboxylate water reducer containing the phosphate group; the unsaturated polyether macromonomer does not contain hydroxyl, phosphorylated modification is achieved through the step that an alcoholic hydroxyl group in the polycarboxylate water reducer pre-polymer and a phosphate esterification reagent are subjected to an esterification reaction, and the using amount of the phosphate esterification reagent is sufficient to completely esterify the alcoholic hydroxyl group in the polycarboxylate water reducer pre-polymer.
Owner:JIANGSU SOBUTE NEW MATERIALS +1

Device and method for treating low-carbon domestic sewage through single-stage SBBR short-range synchronous nitration, denitration and dephosphorization coupled anaerobic ammonia oxidation

The invention relates to a device and method for treating low-carbon domestic sewage through single-stage SBBR short-range synchronous nitration, denitration and dephosphorization coupled anaerobic ammonia oxidation and belongs to the field of biological sewage treatment. The domestic sewage enters a short-range synchronous nitration, denitration and dephosphorization coupled anaerobic ammonia oxidation reactor through a water feed pump. In the short-range synchronous nitration, denitration and dephosphorization coupled anaerobic ammonia oxidation reactor, phosphorus accumulating bacteria achieve anaerobic phosphorus release by making full use of an organic carbon source in raw water; part of NH4<+>-N in the raw water is converted into NO2<->-N by ammonia oxidizing bacteria, one part of the NO2<->-N and the NH4<+>-N remaining in the raw water are subjected to an anaerobic ammonia oxidation action so as to achieve autotrophic denitrification, and the other part of NO2<->-N and a small amount of NO3<->-N resulting from the anaerobic ammonia oxidation action are utilized by denitration phosphorus accumulating bacteria so as to achieve synchronous deep denitrification and dephosphorization. According to the method, short-range nitration, anaerobic ammonia oxidation and denitration dephosphorization are applied to the biological treatment on the domestic sewage in a coupled manner, so that the synchronous deep denitrification and dephosphorization of the domestic sewage can be achieved on the basis of saving energy and making full use of the carbon source.
Owner:BEIJING UNIV OF TECH

Immobilized microbial particle as well as preparation method thereof and method for efficiently treating black and odorous water body therewith

The invention discloses an immobilized microbial particle as well as a preparation method thereof and a method for efficiently treating a black and odorous water body therewith. The preparation methodcomprises the following steps: adding a pre-concentrated microorganism material into a dried calcium peroxide powder, adding a binding agent, uniformly mixing the mixture, making the mixture into circular, cylindrical or square particles with a direct powder compression method or a dry granulation compression method and natural drying, so as to obtain immobilized microbial particles. Degrading bacteria having efficient purification effect on the black and odorous water body are embedded into the immobilized microbial particles formed by mixing calcium peroxide, the binding agent and the microorganism material, and dissolved oxygen in black and odorous wastewater can be quickly improved while the higher bacteria concentration is maintained, so that the black and odorous water body is efficiently purified. The method for efficiently treating the black and odorous water body has the advantages of being stable in treatment effect, having no secondary pollution, facilitating transportationand solving the problems that the black and odorous water body is low in dissolved oxygen and low in inoculant treatment efficiency. The technology is efficient and practical and plays a significantrole in the environmental engineering governance aspect.
Owner:上海水源地建设发展有限公司 +1

Method for determining chromium content and aluminum content in nickel-chromium-aluminum coated diatomite

The invention belongs to a nickel-chromium-aluminum coated diatomite element analysis technology, and relates to a method for determining chromium content and aluminum content in nickel-chromium-aluminum coated diatomite, wherein microwave sample digestion and inductively coupled plasma atomic emission spectroscopy are adopted to determine the chromium content and the aluminum content in the nickel-chromium-aluminum coated diatomite. According to the method, 5-10 mL of hydrochloric acid, 1-5 mL of nitric acid and 5-10 drops of hydrofluoric acid are adopted to treat (metal-inorganic non-metal powder) nickel-chromium-aluminum coated diatomite, such that problems of large use amounts of reagents for dissolving the sample, difficult dissolving of the sample, incomplete dissolving of the sample, and the like in the prior art are solved. With the present invention, spectrum analysis is performed to find the best analysis line so as to overcome interference of the major element nickel in the nickel-chrome-aluminum coated diatomite and improve measurement accuracy; the study results show that the established method for determining the chromium content and the aluminum content in the nickel-chromium-aluminum coated diatomite is accurate and reliable, and can meet requirements of research and production; and the method of the present invention has characteristics of rapidness, easy operation, manpower saving and material resource saving.
Owner:AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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