4 results about "EDTMP" patented technology

The invention discloses a fracturing imbibition system for refracturing a low-permeability tight oil reservoir and a preparation method of the fracturing imbibition system, and belongs to the technical field of fracturing fluids, the fracturing imbibition system comprises: an acid liquid base fluid: hydrochloric acid, hydrofluoric acid, EDTMPS and deionized water; an amphoteric betaine viscoelastic surfactant; biologically modifying the nanoparticles; a Gemini cationic surface active agent; a corrosion inhibitor; and an organic silicon defoaming agent and a fluorocarbon discharge aiding agent. According to the fracturing imbibition system, through the integrated design of the multifunctional surfactant, the problems that a traditional acid fracturing fluid is insufficient in silicate mineral dissolving capacity, high-temperature viscosity is attenuated, and corrosion inhibitor dependence is caused are solved.

The invention discloses a curcumin extraction and purification method based on an aminophosphonic acid complexing agent, and belongs to the technical field of natural product extraction. According to the method, ethylenediamine tetramethylenephosphonic acid (EDTMP) or amino trimethylene phosphonic acid (ATMP) is taken as a complexing agent, and efficient extraction and accurate purification of curcumin are realized by virtue of a five-step process of raw material pretreatment, complexation reaction, complex separation, complex dissociation and refining purification and by virtue of specific binding and gradient pH regulation of the complexing agent on curcumin. The extraction rate reaches 92% or above, the product purity is larger than or equal to 98.5%, the total content of heavy metal is smaller than or equal to 0.1 mg / kg, and no toxic solvent is left; meanwhile, the process is simple and convenient, the cost is low, the complexing agent can be recycled, and the method is suitable for large-scale production, can be widely applied to preparation of high-purity curcumin in the fields of food and medicine, and has extremely high industrialization value.

The invention relates to the field of oil and gas exploitation, in particular to a corrosion inhibitor for carbon dioxide corrosion and a preparation method thereof. The corrosion inhibitor for carbon dioxide corrosion comprises the following components: foots, sodium hydroxide, a paper pulp by-product, sulfuric acid, m-phenylenediamine, rosin amine, diethylenetriamine and EDTMP, and the paper pulp by-product is a by-product obtained by using wood as a raw material and preparing paper pulp through a sulfate method. The corrosion inhibitor for carbon dioxide corrosion not only is low in cost, but also is low in corrosion rate.

This invention provides a phosphorus-containing wastewater treatment agent, comprising, by weight: 3-10 parts sodium polyphosphate, 0.1-1 parts alkylepoxycarboxylic acid, 5-10 parts ethylenediaminetetraacetic acid, 3-10 parts EDTMPS, 0.1-3 parts polyacrylamide, 5-15 parts iron(III) oxide, 10-30 parts polyaluminum chloride, 10-30 parts modified bentonite, and 0.5-5 parts aminated carbon nanotubes. The preparation method includes the following steps: adding magnetic iron(III) oxide nanoparticles to a polyaluminum chloride solution to obtain a precipitating composite agent; dissolving chitosan in acetic acid solution and adding sodium-based bentonite to obtain modified bentonite; adding water to the remaining materials and mixing well; adding aminated carbon nanotubes and the precipitating composite agent in portions; adding modified bentonite and mixing well to obtain a premix; treating the premix to obtain the product. This product can efficiently and stably adsorb suspended particles and phosphates in water, accelerate the floc settling rate, and enhance phosphorus removal efficiency.