45results about How to "Viscosity unchanged" patented technology

The invention relates to intermolecular Cr 3+ cross-linked polymer gel and a production process. The intermolecular Cr 3+ cross-linked polymer gel comprises the following components which are matched according to mass concentration, wherein partial hydrolysis polyacrylamide is used as host crystal whose concentration range is 0.04%-0.12 %, organic chromium is used as cross linking agent in which the mass concentration of Cr 3+ is calculated based on the mass concentration of polymer, wherein polymer: Cr 3+ = 40:1-100:1, and oil-field produced water or source water is used as solvent. The polymer gel has the characteristics of low viscosity, rapid gel forming speed, large flow resistance and controllable flow ability, which can be used to adjust water injection profile of a water injection well in oil fields which are driven by water, and simultaneously expresses excellent technology and economy.

A process for deeply treating and reclaiming polymer-contained sewage incldues such steps as loading the said sewage in regulation pool, adding disinfectant; adsorbing 20-30% of suspended substance and bacteria, stage-1 membrane filtering to remove over 99% of suspended substance and bacteria, and filtrate out 80% of Ca2+ and Mg+2 ions, stage-2 membrane filtering to filtrate out 90% of Ca2+, Mg2+, K+ and Na+ ions, storing cleaned water 80%-85% in water tank, and using 15%-20% of concentrated liquid back for preparing polymer solution. Its advantages are high recovery rate of wate (72-81%), and no drainage.

The invention discloses a manufacturing device and method for a dual-component mixed epoxy casting dielectric functional gradient insulator. The manufacturing device comprises a dual-material feedingsystem, wherein an extrusion head of the feeding system is arranged on a three-dimensional motion system; the diameter of a spray hole of the extrusion head is adjustable, and one end of the extrusionhead is positioned inside an epoxy casting metal mould; the three-dimensional motion system is connected to a control system; the control system and the feeding system are separately connected to a computer through cables for raw material supply, mixing and extruding as well as control, on X-direction, Y-direction and Z-direction positions, of the extrusion head, so that manufacturing of a dielectric-constant functional gradient insulator is accomplished. Two epoxy resin composite materials of different dielectric properties are mixed on line, so that materials are accurately transferred to specific positions in the mould through a three-dimensional motion platform, and a large-dimension insulator with continuous dielectric characteristic gradient distribution can be manufactured withoutchanging other characteristics of an insulating structure, and therefore, along-surface electrical resistance is improved.

The invention relates to a method for improving the freezing resistance of protein in fermentative freeze flour dough, belonging to foodstuff technique field, mixing the flour, molecular distillation gly ester, sodium alginate, cane sugar, salt, milk powder, and shortening in the stirring tank, adding ice water and activated pentosanase and glucose oxidase solution and yeast solution; stirring until the flour dough forms, through static relaxation, measuring, block separation, rolling and static relaxation again to form flour dough, then freezing for convenient use and instant curing. The invention employs the natural matter of pentosanase and glucose oxidase to catalyze the cross-linking between protein to form more stable flour gluten net structure, which prevent the damage to flour gluten net structure by ice crystal in the froze flour dough, and employs molecular distillation gly ester and sodium alginate to reduce the ice crystal volume, improve the stability of froze flour dough under low temperature to make the specific volume of produced bread be increased obviously and the pulp structure be more delicate and uniform.

The invention belongs to the technical field of silica preparation, and particularly relates to precipitated silica for low-viscosity toothpaste and a preparation method of the precipitated silica. The preparation method comprises the following steps: S1, adding a sodium sulfate solution to a reaction kettle, conducting stirring and heating, and then adding a sodium silicate solution to adjust thepH value; S2, simultaneously adding a sodium silicate solution and a sulfuric acid solution for reaction, and controlling the pH value of the reaction process to be 9-10, and after the sodium silicate solution is completely added, continuing adding the sulfuric acid solution until an end point pH value, and conducting stirring to obtain a preliminary product of silica; and S3, subjecting the preliminary product of silica to pressure filtration and washing by dilute sulfuric acid, and then conducting drying, and finally conducting crushing, so as to prepare the silica. The silica of the present invention can reduce the initial viscosity of the toothpaste and inhibit the viscosity of the toothpaste from growing, enables the toothpaste to maintain a proper viscosity, a good pseudoplasticityand thixotropy, and has a good application effect.

The invention discloses a lubricating oil composition for an electric vehicle gearbox and a preparation method of the lubricating oil composition. The composition is prepared from the following components in percentages by weight: 79.8 to 84.5% of base oil, 4 to 7% of polymethacrylate viscosity index improver, 10 to 13% of special complexing agent for transmission oil and 0.3 to 0.5% of pour pointdepressant, wherein the polymethacrylate viscosity index improver is a comb-shaped polymer, and a shear stability index of the polymethacrylate viscosity index improver KRL 20h is not greater than 28. The lubricating oil composition for the electric vehicle gearbox and the preparation method have the advantages that prepared oil maintains viscosity unchanged under long-term high-speed shearing force, provides reliable protection for the electric vehicle gearbox, has excellent shear stability, outstanding low-temperature rheological property, and capability of greatly increasing high-temperature thickening ability of the oil with low dosage, has good dispersibility, can reduce deposition of oil oxides, and can be used together with a special complexing agent for gearbox to improve cleaningand dispersion performance of the oil.

The invention discloses a method of producing environment-friendly regenerated rubber via low-temperature desulfurization. The method includes the steps of: 1) low-temperature desulfurization througha desulfurization tank or an internal mixer: feeding rubber powder, a composite regenerating activator, and a Mooney stabilizer into the desulfurization tank or internal mixer, performing pressurizedmixing for a certain time, adding an environment-friendly softener such as rosin, performing pressurized mixing for a certain time, heating the material to 120 +/- 5 DEG C for desulfurization regeneration; 2) after regeneration for a certain time, cooling the material to lower than 70 DEG C, discharging the material into a cooling stirrer; 3) at 120 +/- 5 DEG C, delivering the material to a doublescrew plasticizer, cooling the material and discharging the material to a storage plate, and delivering the material to a refiner; 4) circulating the rubber at 40 DEG C in a thin-passing manner for 5min, and automatically cutting and weighing the rubber. The technology has outstanding economic and social benefits.

The invention belongs to the technical field of chloroprene rubber preparation, and provides a preparation method of a sulfur-modified chloroprene rubber with a high latex Mooney viscosity stability in order to solve the problems that the final chain-broken products of conventional sulfur-modified chloroprene rubber are not stable, the Mooney viscosity of latex changes after being stored for a while, the storage stability of raw rubber is bad, the rubber will become hard and the rubber plasticity is reduced after long-term storage, the processing performance turns worse, and the performance of sulfurized rubber degrades. The preparation method comprises the following steps: dissolving sulfur, tetrabutyl thiuram disulfide, and 2-mercaptobenzothiazole into chloroprene monomers to prepare an oil phase; mixing the oil phase with a prepared water phase to carry out emulsification, adding an initiator to carry out reactions; stopping the reactions when the specific weight of the system reaches 1.075 to 1.077, allowing the system to stand still for a while, then adjusting the pH value, cooling on the drum to carry out gelation, and cleaning and drying the gel so as to obtain the target product. The polymerization can be easily controlled, the formula and the technology are simple and convenient, the chain breaking technology is omitted, the molecular weight can be adjusted to a proper value in a short time, the Mooney viscosity of the obtain latex is stable; and the problems that the latex viscosity is hard to control and the storage stability of the latex is bad are solved.

The invention discloses a Sphingomonas paucimobilis strain and application thereof and belongs to the technical field of bioengineering. The Sphingomonas paucimobilis strain is named Sphingomonas paucimobilis strain Y5, is collected in CCTCC (China Center for Type Culture Collection), which is located in Wuhan University, Wuhan, China, and has the collection number of CCTCC NO: M 2015523. Welan gum can be prepared from the train by fermenting under appropriate conditions through carbon sources, nitrogen sources, inorganic salts and water . The strain disclosed by the invention has relatively high sugar conversion ratio and welan gum yield and has a certain application value. The welan gum produced through fermenting the strain is high in quality and is resistant to acids and bases, a 1% aqueous solution viscosity of the welan gum reaches 3500mPa.S, and the viscosity is fundamentally unchanged at the temperature of 150 DEG C. During the fermentation of the strain, the sugar conversion ratio is relatively high and reaches 55% to 60%, and the yield is relatively high and reaches 25-32g/L (dry weight).

The invention discloses a method for slowing the dissolving speed of non-crosslinked gel in a blockage-adjusting agent for an oil field. The blockage-adjusting agent is aqueous solutionon-crosslinkedgel solution prepared by adding the non-crosslinked gel into water on a construction site; in the preparation process, the non-crosslinked gel is added into aqueous solution containing soluble inorganic-salt additive to prepare the blockage-adjusting agent; the blockage-adjusting agent is prepared by the following specific steps: (S1) on the construction site, dissolving the soluble inorganic-saltadditive into clean water in advance to obtain salt solution; (S2) dissolving the non-crosslinked gel in the salt solution to obtain the blockage-adjusting agent. The inorganic-salt additive is sodium chloride or calcium chloride or a mixture of the sodium chloride and the calcium chloride. The method for slowing the dissolving speed of the non-crosslinked gel, disclosed by the invention, has thebeneficial effects that the problem that the sticky and rod-climbing phenomenon is serious due to excessively-fast dissolving speed of high-strength non-crosslinked gel and causes difficulty in pumping injection and failure in pumping injection when the non-crosslinked gel is injected into the stratum can be solved and technical support can be provided for operability of on-site construction.

The invention discloses a high-salt-resistant viscoelastic surfactant cleaning fracturing fluid and a preparation method thereof. The fracturing fluid contains a cationic surface active agent, and thestructural formula of the cationic surface active agent is shown as the following formula. In the formula, R<1>' is selected from saturated alkyls with a carbon number n meeting a relationship of 16<=n<=24, unsaturated alkyls with a carbon number n meeting a relationship of 16<=n<=24, and a compound as shown in the following formula, wherein R<1> is selected from saturated alkyls with a carbon number n meeting a relationship of 16<=n<=24, and unsaturated alkyls with a carbon number n meeting a relationship of 16<=n<=24; and R<2> is selected from saturated alkyls with a carbon number C meetinga relationship of 3<=C<=7, unsaturated alkyls with a carbon number C meeting a relationship of 3<=C<=7, and short-chain alkylbenzene (C<=5). The cationic surfactant has good resistance to inorganic salts, and the principle is that the R<2> substituent groups block mutual proximity between polar head groups of the cationic surface active agent under a high-mineralization-degree condition, and thenprecipitation of the cationic surface active agent is avoided, so that the micelle continues keeping a dense three-dimensional network structure, and tackifying performance is improved.

The invention provides low emulsifier-added oil-based drilling fluid. The low emulsifier-added oil-based drilling fluid comprises the following components: oil, an emulsifier, an alkalinity conditioning agent, organic bentonite, a filtrate loss reducer, calcium chloride and water. The emulsifier content of the low emulsifier-added oil-based drilling fluid is low, but the low emulsifier-added oil-based drilling fluid can satisfy the basic performance requirement of the oil-based drilling fluid. According to the experiment result of the embodiments, the density of the low emulsifier-added oil-based drilling fluid is 1.4-2.5 g/cm<3>, the aging temperature can reach as high as 220 DEG C, the plastic viscosity can reach as low as 20 mPa.s, and the demulsification voltage can reach as high as 1763 V. In addition, after brine and bentonite invasion, the anti-aging temperature, viscosity, dynamic shearing force and demulsification voltage of the drilling fluid cannot be almost changed, and the drilling fluid has excellent anti-pollution performance.

The present invention relates to special alkoxylation products, a method for the production thereof, compositions which contain said alkoxylation products, and to the use thereof.

The invention relates to the technical field of smelting stokehold equipment, and provides a hot metal based hydraulic clay gun and an use method. The hydraulic clay gun comprises a controller, a first hydraulic cylinder, a second hydraulic cylinder, a first turning valve, a second turning valve, a first flow rate sensor, a second flow rat sensor, a first valve, a second valve, a flow-in pipe, a reflowing pipe, a storing box filled with hot metal, a heater arranged on the storing box, a driving pump arranged on the flow-in pipe, a gun transferring mechanism which is connected to a piston rod of the first hydraulic cylinder, and a clay injecting mechanism which is connected to a piston rod of the second hydraulic cylinder. According to the hot metal based hydraulic clay gun and the use method, the use method is carried out; the hot metal is used as a pressure transferring medium, so that the viscosity of the pressure transferring medium under high temperature basically remains, and as aresult, the safety of the hydraulic clay gun is greatly improved, and the leakage is avoided; the times of replacing the pressure transferring medium is greatly decreased; and the cost is saved.

The invention belongs to the technical field of composite material preparation and specifically relates to phosphorus-containing polyaryletherketone capable of increasing interlaminar toughness of a bismaleimide resin based composite material and its toughening film. In allusion to specific technological requirements for preparing a composite material laminate from a bismaleimide resin system by a RTM forming process, an interlaminar-toughening phosphorus-containing polyaryletherketone film which matches the bismaleimide resin RTM forming process is designed. The invention is characterized in that the film is basically not dissolved in the resin system at the bismaleimide resin injection stage so as to maintain a complete film structure and effectively avoid problems such as resin flowing difficulty caused by abrupt increases in viscosity of the resin system due to the film dissolved during the injection process; but at the stage of heating and curing processes after resin injection, the toughening film and the resin matrix undergo dissolution and phase splitting so as to generate the toughening effect, form the interlaminar-toughening structure, raise damage tolerance of the composite material and greatly improve interlaminar toughness of the composite material. Meanwhile, the phosphorus-containing polyaryletherketone has excellent heat resistance, and heat resistance of the composite material will not be influenced.