19 results about "Strong salt" patented technology

The application belongs to the technical field of building materials, and discloses a carbonized gamma-C2S modified salt-storing slow-release ceramsite as well as a preparation method and application thereof. First, a porous ceramsite is treated with an inhibitor and a surfactant to obtain active ceramsite; then the active ceramsite is soaked in a saturated solution of deicing salt to obtain salt-storing ceramsite; then the salt-storing ceramsite is treated with a temperature-sensitive agent to obtain salt-storing slow-release ceramsite; finally, the salt-storing slow-release ceramsite is modified by carbonized gamma-C2S to form a core-shell structure with the salt-storing slow-release ceramsite as the core and the carbonized gamma-C2S as the shell, thereby obtaining the carbonized gamma-C2S modified salt-storing slow-release ceramsite. The ceramsite prepared by the application has the comprehensive performance of lightweight, high strength, strong salt-storing capacity and good slow-release effect, and when applied to asphalt pavement materials, can play a long-acting deicing effect and ensure good road performance, thereby having a wide application prospect in regions with much snow in winter in China.

The embodiment of the invention relates to the technical field of heavy anti-corrosion coatings, and discloses a marine facility anti-corrosion protective layer regulation and control method adapting to a strong salt mist environment, and the method comprises the following steps: preparing a self-activation intermediate paint, and applying the self-activation intermediate paint between a primer and a finish paint to form a composite protective layer; the core of the self-activation intermediate paint is that a main agent of the self-activation intermediate paint contains a dual-trigger mineralization precursor, and the precursor is composed of BF4-loaded hydrophobic modified zeolite and zinc phosphate coated water glass particles; when the coating is damaged, the corrosion microenvironment of the damaged area can cooperatively trigger the zeolite to release BF4 <-> to buffer the pH value, and meanwhile, the coated water glass particles are triggered to be dissolved and release silicate ions; the released silicate ions and positive ions in the environment are subjected to in-situ reaction to generate mineralized products, and a damaged area is blocked. The method can actively inhibit corrosion expansion and cathodic disbonding after the coating is damaged, and the long-term reliability and the service life of the protective layer are remarkably improved.

This invention discloses a flocculant for treating fracturing flowback fluid, relating to the field of oilfield wastewater treatment technology. The flocculant comprises modified starch and organic acid. The preparation method of the modified starch includes the following steps: reacting allyl alcohol glycidyl ether with 1,4,7-trimethyldiethylenetriamine; after the reaction, separating and purifying to obtain an intermediate product; taking the intermediate product and dissolving it, adding an alkyl halide to perform a quaternization reaction; after the reaction, separating and purifying to obtain a cationic monomer; taking pregelatinized starch and dispersing it in water, then adding the cationic monomer, acrylamide, and an initiator to perform free radical polymerization; after the reaction, drying to obtain the final product. The flocculant for treating fracturing flowback fluid provided by this invention not only has strong salt resistance, making it suitable for the high-salt environment of fracturing flowback fluid, but also effectively removes oil, turbidity, color, and suspended solids from the fracturing flowback fluid, and has a strong COD removal capacity.

This invention discloses a microorganism, a microbial agent, and their applications. The microorganism is *Zygosaccharomyces rouxii*, which was deposited on May 27, 2024, at the China General Microbiological Culture Collection Center (CGMCC) with accession number CGMCC No. 30794. The novel *Zygosaccharomyces rouxii* strain obtained by this invention exhibits rapid growth, strong salt and acid tolerance, and a strong ability to metabolize nitrates and nitrites. Food or feed production methods developed using this novel strain and microbial agent demonstrate high salt tolerance, high fermentation efficiency, and a short production cycle, effectively reducing nitrate and nitrite content during fermentation. Fermented foods made using this novel strain are rich in yeast, low in nitrates and nitrites, and are nutritionally healthy with a unique flavor.

The application relates to a preparation method and application of a low-temperature-resistant ester-based electrolyte. The method comprises the following steps: firstly, dissolving lithium bistrifluoromethylsulfonylimide into a mixed solution of difluoropropionic acid ethyl ester and fluorinated ethylene carbonate to obtain solution A; secondly, dissolving lithium nitrate into ethylene glycol dimethyl ether to obtain solution B; and thirdly, adding solution B into solution A to obtain the low-temperature-resistant ester-based electrolyte. The weak-solvent electrolyte is composed of three solvents and two lithium salts, the carboxylic acid ester has a low melting point and a strong salt-dissolving capacity, the freezing point of the electrolyte can be significantly reduced, the electrolyte still has strong fluidity at low temperature, the migration rate of lithium ions at low temperature is improved, and the low-temperature performance of the battery is improved. The low-temperature-resistant ester-based electrolyte prepared by the application provides valuable insights for the next-generation electrolyte of lithium ion batteries operated under extreme conditions.

The application discloses Vibrio fluvialis JH-3, which is preserved in the Guangdong Microbial Culture Collection Center and has a preservation number of GDMCC NO: 66094. The application also discloses application of the Vibrio fluvialis JH-3 in denitrification and nitrogen removal. The application further discloses a denitrification and nitrogen removal method for salt-containing wastewater, which comprises the following steps: mixing the Vibrio fluvialis JH-3 with salt-containing wastewater to obtain a mixed solution, and culturing to carry out denitrification and nitrogen removal. The Vibrio fluvialis JH-3 screened by the application has strong salt-tolerant denitrification capacity and can be used for biological nitrogen removal of high-salt wastewater.

The utility model relates to the technical field of concrete piles, in particular to a reinforced concrete pile with strong salt and alkali resistance, which comprises a concrete pile base body and graphene modified foam, spiral stirrups are vertically and uniformly distributed in the concrete pile base body, and a framework is sleeved on the outer walls of the spiral stirrups. A plurality of groups of spiral stirrups are arranged on the framework, joint binding steel wires are arranged at the joints of the framework and the plurality of groups of spiral stirrups, transverse reinforcing stirrups and longitudinal reinforcing stirrups are arranged on the upper surface and the lower surface of the framework respectively, the transverse reinforcing stirrups and the longitudinal reinforcing stirrups are distributed vertically, and side grooves are formed in the periphery of the outer portion of the concrete pile base body. Graphene modified foam is clamped on the inner sides of the side grooves; the problems that after an existing concrete pile is prefabricated and formed in the prior art, chloride ions can penetrate through the concrete pile due to salt and alkali in the environment, so that the chloride ions make contact with internal steel bars, a passive film is damaged, electrochemical corrosion is caused, and the service life of a soil pile is shortened are solved.

The invention relates to the technical field of oilfield sewage treatment, and particularly discloses a composite water clarifier for oilfield sewage treatment and a preparation method of the composite water clarifier. The invention relates to a composite water clarifier for oilfield sewage treatment. The composite water clarifier is prepared from the following raw materials: dual modified polyacrylamide, an imidazoline quaternary ammonium salt grafted copolymer, a scale inhibitor, an adsorbent, dodecyl dimethyl betaine, a coagulant aid and deionized water, the double modified polyacrylamide is obtained by performing double modification on polyacrylamide by using 2, 3-epoxypropyl trimethyl ammonium chloride and a hydrophobic monomer; the imidazoline quaternary ammonium salt grafted copolymer is a grafted copolymer of imidazoline quaternary ammonium salt, acrylamide and acrylamide-2-methylpropanesulfonic acid. The composite water clarifier can be used for treating high-salt and high-oil sewage generated in the middle and later periods of oilfield exploitation, has the advantages of being high in salt resistance, thorough in demulsification and good in flocculation effect, can efficiently remove oil and suspended solids, ensures that effluent reaches the standard, and meets the complex sewage treatment requirements of an oilfield.

This invention discloses a composite sealant for metal artifacts and its preparation and application method, comprising a base sealant and a top sealant. The base sealant comprises 20-40 parts by weight of a film-forming substance, 0.5-5 parts by weight of a composite corrosion inhibitor, and 55-79 parts by weight of a first solvent. The composite corrosion inhibitor comprises benzotriazole and 2-mercaptobenzothiazole, with a mass ratio of benzotriazole to 2-mercaptobenzothiazole of 1:0.2-1:5. The top sealant comprises 20-40 parts by weight of a film-forming substance, 1-10 parts by weight of nano-silica, 0.5-5 parts by weight of a hydrophobic modifier, and 45-78 parts by weight of a second solvent. This invention achieves efficient and durable protection for metal artifacts through the synergistic combination of benzotriazole and 2-mercaptobenzothiazole in the base sealant, exhibiting advantages such as good water resistance, strong salt spray corrosion resistance, high transparency, and good reversibility.

The embodiment of the present application relates to the technical field of heavy-duty coating, and discloses a marine facility corrosion protection layer regulation and control method suitable for strong salt spray environment, which comprises preparing a self-activated intermediate paint and applying it between a primer and a topcoat to form a composite protective layer; the core is that a double-triggered mineralization precursor is contained in the main agent of the self-activated intermediate paint, the precursor is composed of BF4 ‑ loaded hydrophobic modified zeolite and zinc phosphate coated water glass microparticles; when the coating is damaged, the corrosion microenvironment of the damaged area can synergistically trigger the zeolite to release BF4 ‑ to buffer the pH, at the same time trigger the dissolution of the coated water glass microparticles and release silicate ions; the released silicate ions react in situ with cations in the environment to generate mineralization products, plugging the damaged area. The present application can actively inhibit corrosion propagation and cathodic delamination after coating damage, significantly improving the long-term reliability and service life of the protective layer.

This invention belongs to the field of petroleum extraction technology, specifically relating to a polymer thickener for oilfield fracturing and its preparation method. The polymer thickener is obtained by polymerizing the following four monomers: polyether, with the following structural formula: [structural formula would be inserted here], where n is a natural number from 5 to 50; allyl malonic acid, with the following structural formula: [structural formula would be inserted here]; 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, with the following structural formula: [structural formula would be inserted here]; and sodium p-styrene sulfonate, with the following structural formula: [structural formula would be inserted here]. The polymer thickener of this invention has the advantages of high apparent viscosity, strong shear resistance, and strong salt and hardness resistance.

The invention relates to the technical field of oilfield exploitation, in particular to a surfactant composition as well as a preparation method and application thereof. The composition comprises a component A and a component B in a mass ratio of 1: (0.01-100), the component A has a structure as shown in a formula (1), and the component B has a structure as shown in a formula (2). The surfactant composition disclosed by the invention has the advantages of good surface and interfacial activity, strong salt resistance and strong wetting and infiltration capacity, is used for chemical flooding enhanced oil extraction, and has a good application prospect. The viscosity of the heavy oil can be obviously reduced, and the oil displacement efficiency can be improved, so that the method has wide application prospects and practical significance.

The application relates to the field of petroleum chemical industry and discloses a composite initiation system, application of the composite initiation system and a polyacrylamide emulsion and a preparation method of the polyacrylamide emulsion. The composite initiation system comprises a compound A, a redox initiator and a first initiator; the first initiator is selected from azo initiators and / or peroxide initiators; wherein the compound A is at least one of compounds shown in formula I; in formula I, R1, R2 and R3 are independently C1-C5 linear alkylene, C3-C5 branched alkylene; R4, R5, R6, R7, R8 and R9 are independently C1-C3 alkyl; in formula I, X has a structure shown in formula I-1; in formula I-1, a, b and c are independently integers of 0-3. The composite initiation system is used for preparing the polyacrylamide emulsion, and the prepared polyacrylamide emulsion has the characteristics of high polymer molecular weight and strong salt resistance.

The present application relates to the technical field of oil and gas field acid liquid, in particular to an integrated three-dimensional variable viscosity acid system and a preparation method thereof, the temperature-resistant and salt-resistant polyacrylamide copolymer prepared by the present application can form a three-dimensional network structure by introducing strong polar groups such as sulfonic acid groups and amide groups, the structure can maintain high viscosity under high temperature and high salt environment through molecular chain stretching, and the viscosity is reduced at low temperature to realize the characteristics of three-dimensional variable viscosity; secondly, the sulfonic acid group of 2-acrylamide-2-methylpropanesulfonic acid has strong salt resistance, the cyclic structure of acryloyl morpholine can enhance the rigidity and thermal stability of the molecular chain, and polyvinyl alcohol fiber can be used as a physical crosslinking point to improve the shear resistance of the system through hydrogen bonding, and the synergistic effect of the three can make the prepared integrated three-dimensional variable viscosity acid system have a more stable molecular structure.

The invention discloses a corrosion-resistant Ru dissolution-resistant catalyst and a preparation method thereof, and a compact graphene coating layer with the thickness of 3-8 nm is constructed on the surface of a TiO2 nanobelt and is used for isolating synergistic erosion of Cl <-> to Ru active sites in a high-salt system. Controlled nanopores or defects are introduced into the ultrathin graphene layer, it can be guaranteed that H2O2 and substrate molecules can reach ruthenium cluster active sites, Cl <-> migration is blocked, the 50-60 nm micropore structure in the TiO2 nanobelt is combined, the Ru cluster active sites are effectively protected in NaCl aqueous solution high-salt waste water, Ru dissolution caused by chloride ion erosion is remarkably inhibited, and the Ru / TiO2 nanobelt composite material is obtained. The chlorine corrosion resistance and the structural stability of the catalytic material are effectively improved. And the paint has unique corrosion resistance in strong-salt and strong-oxidation environments.

The invention discloses a strontium chloride production method based on oxidation coprecipitation and salting-out crystallization, and belongs to the technical field of inorganic chemical industry. The method comprises the following steps: performing acidolysis on a strontium carbonate raw material, adjusting the pH value by using carbide slag, and introducing a sulfur source; converting the sulfur source into strontium sulfate microcrystals with high adsorption activity in situ by controlling oxidation conditions, and deeply removing iron and organic impurities by utilizing a coprecipitation effect; evaporating and concentrating the filtrate, maintaining a high-concentration calcium chloride background environment to generate a strong salting-out effect, and inducing strontium chloride crystals to separate out under the synergistic effect of ultrasonic waves and auxiliaries; according to the method, waste residues are creatively utilized to realize treatment of impurities with waste, meanwhile, the one-way crystallization yield is remarkably improved by utilizing the salting-out effect, and the method has the advantages of low production cost, high product purity and stable and environment-friendly process.

The present application relates to the field of plant disease biological control, and specifically discloses a streptomyces olivaceus and application thereof. The prepared streptomyces olivaceus biocontrol agent can prevent and control sclerotinia disease and clubroot disease, and the prevention and control effects reach more than 50%, and the bacteria have strong salt and alkali resistance, indicating that the strain or the biocontrol agent has good application prospect in the fields of sclerotinia disease and clubroot disease prevention and control and in the salt and alkali environment.

The present disclosure provides a chemical bonding lost circulation additive, a composite lost circulation additive comprising same, a drilling fluid, and a use thereof in drilling engineering. The chemical bonding lost circulation additive comprises a core layer and an inorganic material coating the outer surface of the core layer, wherein the material of the core layer has a structure as shown in formula (I). The lost circulation additive of the present application demonstrates a higher one-time plugging success rate, better pressure-bearing capacity, better compatibility with a drilling fluid, stronger temperature resistance, stronger contamination resistance, and stronger salt tolerance.(I)

The application relates to the technical field of oilfield sewage treatment, and particularly discloses a composite water clarifying agent for oilfield sewage treatment and a preparation method thereof. The composite water clarifying agent for oilfield sewage treatment is prepared from the following raw materials: double-modified polyacrylamide, imidazoline quaternary ammonium salt graft copolymer, scale inhibitor, adsorbent, dodecyl dimethyl betaine, coagulant aid and deionized water; the double-modified polyacrylamide is obtained by double modification of 2,3-epoxypropyl trimethyl ammonium chloride and a hydrophobic monomer on polyacrylamide; and the imidazoline quaternary ammonium salt graft copolymer is a graft copolymer of imidazoline quaternary ammonium salt, acrylamide and acrylamide-2-methylpropane sulfonic acid. The composite water clarifying agent can be used for treating high-salt and high-oil sewage generated in the middle and late stages of oilfield exploitation, has the advantages of strong salt resistance, complete demulsification and good flocculation effect, can efficiently remove oil and suspended solids, ensures that the effluent meets the standards, and meets the complex sewage treatment requirements of oilfields.