54results about How to "Inhibition of reduction reaction" patented technology

The invention discloses a method to reducing degree of degradation under polypropylene melting grafted process, which is comprises the following steps: 1. adding grafted monomer, secondary monomer, trigger, anti-oxidant and polypropylene to high-velocity dispersion machine and mixing evenly; the usage of grafted monomer is 0.5%-15% of polypropylene total quantity; the usage of secondary monomer is 0.1%-10% of polypropylene total quantity; the usage of trigger is 0.1%-15% of anti-oxidant; the usage of anti-oxidant is 0.1%-1.5% of polypropylene total quantity; 2. adding the mixture of first step into bi-bolt force out machine; melting; squeezing grafted reaction; 3. cooling and dicing squeezing material of the second step get graft modified polypropylene of degraded to a less extent, graft ratio increased.

The pretreatment method for high-concentration organic sewage contained sulfate by micro-oxygen hydrolyzing and acidifying comprises: on micro-oxygen condition, controlling the hydrolysis and acidification by aeration during anaerobic treatment process. Compared with prior art, this invention improves system treatment efficiency and yield of methane, and eliminates the effect to biological treatment from sulfide.

The invention provides a method for eliminating odor emitting by the water and bottom sludge in a river. The method is characterized in that: ferric oxide and sodium humate complex preparation is added into river water with the dosage of 10-30g per cubic meter. The weight percentage ratio of the ferric oxide and the sodium humate complex preparation is 50-70 percent of ferric oxide and 30-50 percent of sodium humate. The method of the invention can obviously inhibit water and bottom sludge in a river emitting odor, so as to avoid disturbing people.

The invention discloses a PET aluminum-plated base membrane and a preparation method thereof. The PET aluminum-plated base membrane comprises a core layer in the middle and surface layers arranged on the two surfaces of the core layer. The surface layers and the core layer are integrally formed through co-extrusion and two-way stretching. The core layer is a PET layer, and the surface layers are PET layers mixed with anti-adhesion agents. The preparation method includes the steps of polyester synthesis, mixing, co-extrusion, sheet casting through a die, longitudinal stretching, transverse stretching, traction and trimming, corona treatment, coiling, cutting and obtaining of a finished product. The PET aluminum-plated base membrane can be prepared through the preparation method, and has excellent light transmittance and surface tension. The light transmittance can reach 89%, the glossiness is 130, the surface tension can reach 58 dyne, and the light transmittance, the glossiness and the surface tension can keep for a long time and do not weaken. Aluminum-plated membranes meeting different packaging requirements can be produced, and the produced aluminum-plated membranes are uniform and high in aluminum layer bonding force.

The invention provides an environment-friendly high-temperature acidizing resistant corrosion inhibitor and a preparation method thereof. The environment-friendly high-temperature acidizing resistantcorrosion inhibitor comprises the components of, by weight, 10-50 parts of corrosion inhibitor primary agents, 1-10 parts of synergists, 0.5-1.5 parts of surfactants, 40-60 parts of solvents and 5-10parts of mercaptan acid; the corrosion inhibitor primary agent comprises 5-15 parts of polyquinoline quaternary ammonium salt, 5-10 parts of imidazolium quaternary ammonium salt, 10-25 parts of Mannich base; and the synergist comprises 1-5 parts of organic alkynol and 1-10 parts of plant extracts, wherein plant extract comprises one or more of a stephania tetrandra extract, a rhizoma corydalis extract, a sophora flower bud extract and a roxburgh rose extract. The environment-friendly high-temperature acidizing resistant corrosion inhibitor has the excellent performance of environmental protection, high temperature resistance, low damage and the like.

The invention relates to the technical field of a lithium ion battery, in particular to an electrolyte and a lithium ion battery containing the same. The electrolyte disclosed by the invention comprises a lithium salt, an organic solvent and an additive, wherein the additive contains a bipolyester compound and a sulphate compound, the bipolyester compound comprises a carbonic bipolymer, a carboxylic biopolymer and a sultone biopolymer, and the sulphate compound comprises an annular sulphate compound and a straight-chain or branch-chain sulphate compound. The bipolyester compound can be used for effectively forming a film at a positive electrode and preventing an electrolyte from being oxidized at the positive electrode, so that the high-temperature performance and the cycle performance of the battery are effectively improved; and the sulphate compound can be used for preventing the bipolyester compound from being reduced at a negative electrode, so that the battery acquire favorable low-temperature charge-discharge performance and rate performance, and the cycle performance of the battery can also be improved.

The invention discloses a PET transfer basement film and a preparation method thereof. The PET transfer basement film comprises a core layer and surface layers, wherein the core layer is positioned in the middle of the PET transfer basement film; the surface layers are arranged on the two surfaces of the core layer; the surface layers and the core layers are integrally formed by co-extrusion and bidirectional stretching; the core layer is a PET layer; and each surface layer is a PET layer mixed with an anti-blocking agent. The preparation method comprises the following steps: polyester synthesizing, blending, co-extruding, die head casting, longitudinal stretching, transverse stretching, traction and edge cutting, rolling, slitting and finished product obtaining. The thickness is 12-20 mu m, the breadth is 8,700 mm, the heat resistance temperature exceeds 120 DEG C, the tensile strength is greater than or equal to 220 MPa, the heat shrinkage rate is less than or equal to 3.5%, and the friction coefficient of the surface of the basement film is less than or equal to 0.55. Compared with the conventional transfer basement film, the PET transfer basement film has excellent shrinkage preventing property. The transfer basement film has excellent heat stability and high tensile strength, and can meet requirements of clients. Transfer films which do not deform at high temperature, are complete in transfer and full and clear in image-texts are produced.

The invention relates to an electrolyte adaptive to a high-nickel ternary positive electrode material. The electrolyte comprises an electrolyte lithium salt, a non-aqueous organic solvent and additives, the additives comprise a positive electrode film-forming additive, a negative electrode film-forming additive and a flame-retardant additive, the positive electrode film-forming additive is sodiumdihydrogen phosphate, the negative electrode film-forming additive is p-toluenesulfonyl isocyanate, and the flame-retardant additive is (trifluoroethoxy) pentafluorocyclotriphosphazene. According to the electrolyte adaptive to the high-nickel ternary positive electrode material, the normal-temperature/high-temperature circulation, high-temperature storage and safety performance of a high-nickel ternary positive electrode material battery under high voltage are effectively improved through a synergistic effect generated by combined use of multiple additives.

The invention relates to a method for directly preparing 2,5-dihydroxymethyl tetrahydrofuran from fructose, which comprises the following step: in a water/oil two-phase system, directly converting fructose into the 2,5-dihydroxymethyl tetrahydrofuran by one step under the conditions of 0.5-10 MPa H2 and 80-180 DEG C under the action of a catalyst for 0.5-16 hours. The maximum selectivity of the 2,5-dihydroxymethyl tetrahydrofuran is 72%, and the maximum yield is 56%.

The invention, which belongs to the technical field of hexavalent chromium detection methods, particularly relates to a method for detecting the content of hexavalent chromium in soil. The method canbe used for detecting hexavalent chromium in a soil sample containing a large number of reducing agents after ventilation, heating and other pretreatment. Ferric oxide and sulfur reducing agents are used in the method, trivalent chromium is not oxidized, and the oxidation environment can be kept under a certain air flow to inhibit the reduction reaction. Therefore, the interference of a reducing agent on an alkali digestion result is reduced and the digested hexavalent chromium is protected to the greatest extent, so that the concentration of the hexavalent chromium in the solution is rapidlyand accurately measured. The Cr<6+> detection method provided by the invention is simple and convenient to operate, rapid in detection and low in cost and is suitable for chromium-contaminated site repair, acceptance and detection. The method has the broad application value.

The invention discloses an environment-friendly oxygen-resistant corrosion inhibitor for oilfield surface gathering pipelines and a preparation method thereof. The environment-friendly oxygen-resistant corrosion inhibitor for oilfield surface gathering pipelines at least includes 10-50 parts of a corrosion inhibitor main agent, 1-10 parts of a synergist, 0.5-1.5 parts of a surfactant, 40-60 partsof a solvent, 5-25 parts of amino acid, and 2-10 parts of a deoxidant. The corrosion inhibitor main agent comprises: 5-20 parts of an imidazole quaternary ammonium salt, and 10-25 parts of Mannich base. The synergist comprises 1-5 parts of organic alkynol, and 1-10 parts of a plant extract. Specifically, the plant extract includes one or more of a radix stephaniae tetrandrae extract, a banyan leafextract, an artemisia argyi extract, a lettuce extract and a roxburgh rose extract. The environment-friendly oxygen-resistant corrosion inhibitor for oilfield surface gathering pipelines provided bythe invention has the excellent performance of environmental protection and low damage.

A new processed steel sheet comprising of a steel base coated with a Zn or its alloy plating layer and a converted layer, which contains both of at least an insoluble or scarcely-soluble metal compound and at least a soluble metal compound. The insoluble or scarcely-soluble compound may be one or more of valve metal oxides or hydroxides, and the soluble compound may be one or more of valve metal fluorides. The converted layer may be also composed of one or more of complex compounds of Mn and Ti. The insoluble or scarcely-soluble compound acts as a barrier for insulation of a steel base from an atmosphere, while the soluble compound exhibits a self-repairing faculty to repair defective parts of the converted layer. Due to the converted layer, the processed steel sheet is remarkably improved in corrosion resistance, without the presence of chromium compounds which would put harmful influences on the environment.

The invention discloses an ultrahigh-temperature polyimide heat-conducting insulating material and a preparation method thereof, and belongs to the field of high polymer materials. The ultrahigh-temperature polyimide heat-conducting insulating material comprises the following raw materials in parts by mass: 100 parts of reactive polyimide resin, 5-20 parts of a heat-conducting filler, 3-5 parts of a repairing agent, 0.5-3 parts of an anti-aging agent, and 1-10 parts of a reactive diluent. According to the preparation method of the ultrahigh-temperature polyimide heat-conducting insulating material, reactive polyimide resin is taken as a base material, the heat-conducting filler, the repairing agent, the anti-aging agent and the reactive diluent are added, a modified resin system is prepared by adopting a melt blending process, an insulating material system with the glass transition temperature being greater than 350 DEG C, the initial thermal decomposition temperature being greater than 500 DEG C, the heat conductivity coefficient being greater than 0.3 W/m.K, the electric breakdown strength being greater than 80kV/mm and the thermal expansion coefficient being less than 40PPM/DEG C is obtained by means of program temperature controlled curing, the excellent performance of the insulating material system meets the use requirements of sealing and insulation of special motor stator electromagnetic wire windings, and the material has a wide application prospect in the technical field of heavy oil thermal recovery.

The invention discloses a car trunk hinge part. The outer surface of the hinge part is treated with a phosphating solution to form a phosphating film, wherein the phosphating solution comprises the following components in parts by weight: 30-40 parts of phosphoric acid, 0.1-0.5 part of copper nitrate, 15-20 parts of zinc oxide, 1-3 parts of manganese salt, 2-4 parts of nickel nitrate, and 7-10 parts of a compound accelerant. The car trunk hinge part has the advantages that: phosphoric acid and zinc oxide are taken as main film-forming substances, so that a continuous and uniform phosphating film is formed on a treated metal surface. Meanwhile, the compound accelerant further can be added to increase film-forming speed of the phosphating film and improve film-forming quality of the phosphating film. Besides, electrode potential of copper is positive than that of iron, and copper ions are reduced for being deposited on the surface of a phosphated hinge body, so that a cathode region of the surface is increased, electrochemical reaction of phosphating is further promoted, formation of a phosphating crystal nucleus is accelerated, and crystalline grains are refined, and therefore, thephosphating film is compact and uniform, phosphating speed is reduced, and the phosphating film has the advantages of being tight in film-forming and strong in adhesive force.

The invention discloses a PET gold stamping base film and a preparation method thereof. The PET gold stamping base film comprises a core layer located in the middle and surface layers arranged on two surfaces of the core layer, wherein the surface layers and the core layer are integrally molded through co-extrusion and biaxial stretching; the core layer is a PET layer; each surface layer is a PET layer mixed with an anti-blocking agent; the preparation method comprises the steps of synthesizing a polyester, commixing, co-extruding, casting a piece on a die head, carrying out longitudinal stretching, carrying out transverse stretching, drawing and trimming, winding and slitting to obtain a finished product, wherein the thickness is 10mu m to 36mu m, the width is 8700mm, the heat-resistance temperature exceeds 120 DEG C, the tensile strength is more than or equal to 220MPa, the heat shrinkage rate is smaller than or equal to 3.5 percent, and the surface friction coefficient of the base film is smaller than or equal to 0.55. Compared with a conventional transferring base film, the PET gold stamping base film provided by the invention has excellent shrinkage-proof performance; the gold stamping base film has excellent thermal stability and great tensile strength, and can meet the requirements of customers to produce gold stamping films which are not deformed at a high temperature, are completely subjected to gold stamping and have complete and clear patterns and texts.

The invention relates to a preparation method of high melt strength polypropylene by solid phase reaction. The purpose of the invention is to solve the problems that universal polypropylene is low instrength and is hard to be applied to the fields such as foaming, hollow molding. A formula of the high melt strength polypropylene comprises the following materials in parts by weight: 100 parts of powdery or granular polypropylene, 1 to 4 parts of grafted monomer, 0.2 to 4 parts of an antioxidant, the preparation method comprises the following steps: weighing and uniformly mixingpowdery or granular polypropylene, grafted monomer and the antioxidant, enabling the three to react for 5 to 40 mins at the temperature of 120 to 130 DEG C in air, after reaction, adding 0.1 to 0.4 parts by weight ofthe antioxidant and uniformly stirring (used for stabilization of subsequent processing and forming), thus obtaining high melt strength polypropylene. The invention provides a method for preparing high melt strength polypropylene with simple process, flexible operation, low cost, good environmental protection, good color and luster with large scale industrial implementation prospect, branched structure and a small amount of cross-linking structure.