19 results about "Ammonium chloride" patented technology

This invention discloses a cationic etherifying agent and its preparation method, belonging to the field of cationic etherifying agent production technology. The preparation method includes: continuously feeding trimethylamine and hydrochloric acid into a raw material pretreatment unit, pre-cooling to -10~20℃; entering a first tubular reactor, reacting at -10℃~20℃ and 0.15MPa for 10~60 minutes to generate trimethylammonium chloride; trimethylammonium chloride and epichlorohydrin entering a static mixer, simultaneously adding a catalyst and an organic amine; entering a second tubular reactor, reacting at 10~50℃ and 0.2MPa for 1~3 hours; during the reaction, monitoring the chloride ion concentration and epichlorohydrin residue in real time, dynamically adjusting the reaction parameters; filtering the reaction product through a nanofiltration membrane to obtain a high-purity cationic etherifying agent. This invention employs a continuous tubular reaction process combined with automatic control and nanofiltration membrane separation, resulting in a short production cycle, low energy consumption, few by-products, and a high-purity, odorless product, showing good industrial application prospects.

This invention discloses a modified rhamnolipin waterproofing agent for well workover operations in offshore oilfields and its preparation method. The method involves a one-step process where a 3-chloro-2-hydroxypropyltrimethylammonium chloride aqueous solution is added dropwise to a rhamnolipin solution, attaching a quaternary ammonium cation to the hydroxyl group of the rhamnolipin. After the reaction is complete and the solution is purified, the modified rhamnolipin waterproofing agent is obtained. The raw materials used in this invention are readily available, the preparation method is simple, and it is conducive to industrial production. The raw materials and products used have low biotoxicity and good environmental friendliness, which is beneficial for application in offshore oilfields. The solution prepared with the modified rhamnolipin waterproofing agent exhibits low surface tension, good temperature and salt resistance, and wetting improvement ability. It can significantly improve the reservoir water-locking permeability recovery rate, demonstrating not only a good waterproofing effect but also alleviating reservoir contamination problems caused by long-term production to a certain extent.

The application discloses a method and system for strengthening and modifying activated carbon adsorption of perfluorinated compounds by micro-bubbles, belonging to the technical field of water treatment. The application is to immerse activated carbon in a polydiallyldimethylammonium chloride aqueous solution, treat the immersed activated carbon to be neutral and dry to obtain modified activated carbon; raw water containing PFAS is treated by micro-bubbles, and then the modified activated carbon is added to the raw water for reaction, and the treated water is discharged from the upper layer. The application compensates for the insufficient adsorption of short-chain PFAS by traditional activated carbon through PDADMAC electrostatic adsorption, improves the removal effect by combining the enrichment effect of micro-bubbles; the mass transfer is strengthened by slight disturbance, the adsorption kinetics is accelerated, and the interference of natural organic matter can be resisted to protect the adsorption sites; the process condition is mild and safe, there is no secondary pollution, and the engineering popularization is convenient.

The invention discloses an intelligent response type marine antirust agent composition as well as a preparation method and application thereof. The intelligent response type marine antirust agent composition comprises a solvent and the following components in parts by mass: 6-8 parts of ion response microcapsules, 6-8 parts of photo-thermal response microcapsules, 6-9 parts of benzotriazole covalent grafting modified functionalized graphene oxide and 34-38 parts of film-forming resin, a capsule core of the ion response microcapsule is a corrosion inhibitor; the capsule wall is a polyelectrolyte composite membrane formed by self-assembling cationic polyelectrolyte and anionic polyelectrolyte layer by layer, and the outer surface of the capsule wall further comprises an inorganic nanoparticle layer formed by biomimetic mineralization; the cationic polyelectrolyte is poly (diallyldimethylammonium chloride), the anionic polyelectrolyte is sodium polystyrenesulfonate, and the inorganic nanoparticles are calcium carbonate; the photo-thermal response microcapsule comprises a capsule core which is a mixture of CsPbBr and n-octacosane, and a capsule wall which is polyurea formaldehyde.

This invention belongs to the field of solid waste treatment technology, specifically relating to a quaternary ammonium salt ionic liquid microemulsion for heavy oil desorption, its method, and its application. The quaternary ammonium salt ionic liquid microemulsion for heavy oil desorption of this invention, by weight, comprises 0.1-0.8 parts of a quaternary ammonium salt ionic liquid surfactant, 17.2-22.9 parts of n-propanol, 20-25 parts of n-hexane, and 56-59 parts of water; wherein the quaternary ammonium salt ionic liquid surfactant is 1-alkyl-(2-hydroxyethyl)-dimethylammonium chloride. The quaternary ammonium salt ionic liquid microemulsion for heavy oil desorption of this invention is prepared using a quaternary ammonium salt ionic liquid surfactant, n-propanol, n-hexane, and water as raw materials. The microemulsion is an oil-in-water type, characterized by low surface tension, strong solubilizing ability, low dosage, simple treatment process, and recyclability.

This invention relates to a filter aid microcapsule, its preparation method, and its application. The filter aid microcapsule includes a shell and a core cavity located inside the shell; the core cavity is filled with liquid carbon dioxide; the shell, in a radial direction from the core cavity to the shell, sequentially includes a urea-formaldehyde resin layer and a poly(methacryloyloxyethyltrimethylammonium chloride) layer. This invention uses filter aid microcapsules to aid in the flocculation and dewatering of coal slime. The filter aid microcapsules can achieve intelligent control of flocculation followed by deflocculation, meaning that during the settling stage, the microcapsules remain intact, exerting excellent flocculation to ensure settling effect; during the filtration and pressing stage, pressure triggers the disintegration of the filter aid microcapsules, and the encapsulated liquid carbon dioxide rapidly transforms into gaseous carbon dioxide, bursting open the dewatering channels and forming a large number of radial, irreversible microcracks and channel networks. Further, the pressing force efficiently squeezes out water along these newly formed cracks, removing residual water and achieving deep dewatering.

This invention belongs to the field of electrolytic copper foil production technology, specifically relating to an additive, electrolyte, and application for electrolytic copper foil. The additive includes sulfur-containing organic compounds, polyethylene glycol, and quaternary ammonium salt-modified polyetheramine. The quaternary ammonium salt-modified polyetheramine is prepared by a ring-opening grafting reaction between polyetheramine and 2,3-epoxypropyltrimethylammonium chloride. The electrolyte contains 70-100 g / L Cu. 2+ 90-150 g / L SO4 2‑ 15-30 mg / L Cl ‑ The additives and electrolyte of this invention utilize polyethylene glycol and quaternary ammonium salt-modified polyetheramine in combination, which can synergistically reduce the roughness of electrolytic copper foil and improve its mechanical properties.

The present application belongs to the technical field of oil and gas drilling engineering, and particularly relates to a polymer-coated inhibitor for strong inhibition drilling fluid and a preparation method thereof; the inhibitor is prepared by aqueous solution polymerization of acrylamide, acrylamidomethylpropane sulfonic acid, dimethyldiallylammonium chloride, vinyltrimethoxysilane and two novel inorganic modified compounds. The two inorganic modified compounds are a titanate intercalated magnesium aluminum tin silicate nanocomposite and a polyoxometalate grafted rare earth doped cerium dioxide nanorod, respectively. The former is prepared by coprecipitation and intercalation reaction, and the latter is prepared by hydrothermal synthesis and graft modification. The present application significantly improves the hydration inhibition capacity for shale, and can still maintain stable coating effect in high temperature and high salt environment, effectively solving the problem of wellbore instability. The preparation method is simple in process, the raw materials are all commercially available, and is suitable for industrial production, and has a broad application prospect in the field of water-based drilling fluid.

The application provides a filtrate reducer for drilling fluid prepared based on a lignin etherification method, which is obtained by reacting lignin, 3-chloro-2-hydroxypropyl trimethylammonium chloride, an aldehyde compound and a sulfonating agent under alkaline conditions. Compared with the prior art, the lignin-based filtrate reducer is obtained by modifying lignin as a raw material, and the temperature resistance of the lignin-based filtrate reducer can reach 230 DEG C. Compared with conventional filtrate reducers, the lignin-based filtrate reducer has greatly improved temperature resistance, good compatibility with various water-based drilling fluids, and convenience in use. The lignin-based filtrate reducer not only improves the filtrate reduction capacity of the product, but also improves the environmental protection performance of the product. The lignin-based filtrate reducer is a new type of drilling fluid treatment agent suitable for high-temperature deep wells, promotes the progress of drilling fluid technology for deep formation exploration and development in China, and has important application value.

The application discloses a method for extracting thiophene from coal tar and application, and relates to the field of coal chemical industry. When the thiophene is extracted from the coal tar, a eutectic solvent composed of tetraethylammonium chloride and propionic acid is used as a selective extractant, light distillate of the coal tar is extracted through a multistage countercurrent extraction tower, and the extraction phase is subjected to reduced pressure distillation to recover the selective extractant and obtain a crude thiophene product; and then the crude thiophene product is subjected to rectification to obtain the thiophene. The process is green and environmentally friendly, the solvent can be recycled, no three wastes are discharged, and the thiophene with high purity and high yield is obtained. The method for extracting the thiophene from the coal tar is simple to operate, easy to be industrialized, and realizes high-value utilization of the thiophene in the coal tar.

This invention belongs to the field of petroleum additives technology, specifically relating to a zwitterionic high-efficiency clay stabilizer and its preparation method. The invention uses methacryloyloxyethyltrimethylammonium chloride, 2-acrylamido-2-methylpropanesulfonic acid, and N-vinylcaprolactam as copolymers under the action of an initiator to synthesize a terpolymer as a clay stabilizer. Crosslinking agents and stabilizer additives are added, effectively improving the zwitterionic clay stabilizer's electrostatic adsorption capacity, salt resistance, and thermal stability, as well as its tensile and shear strength. It also exhibits good dispersion, wetting, and emulsification effects, making it applicable to the oil and gas extraction industry.

This invention provides a flexible self-rectifying memory, its fabrication method, and its application. In this flexible self-rectifying memory, a polydiallyldimethylammonium chloride buffer switch layer serves as the active switching medium, and its quaternary ammonium salt functional groups provide oxygen ion adsorption sites, promoting oxygen ion aggregation and movement; Ti3C2T x The charge-trapping layer achieves efficient charge trapping through large interlayer spacing and a nanoporous structure. The flexible self-rectifying memory of this invention exhibits tunable self-rectification characteristics and significant crosstalk suppression. The fabrication process of this invention is simple and inexpensive. The advantages of combining the polymer and inorganic layers are not only reflected in the preservation of material flexibility but also in innovative high-performance features such as adjustable self-rectification. The flexible self-rectifying memory of this invention demonstrates great application potential in high-density and ultra-large-scale parallel memory arrays struggling with creeping currents and in learning through neural synaptic plasticity.

This invention relates to the field of oilfield chemical technology, and proposes an emulsion-type fracturing fluid thickener and its preparation method. The raw materials of the emulsion-type fracturing fluid thickener include the following components in parts by weight: 40-50 parts acrylamide, 30-40 parts acrylic acid, 20-30 parts sodium styrene sulfonate, 10-20 parts methacryloyloxyethyltrimethylammonium chloride, 5-10 parts emulsifier, 5-10 parts stabilizer, 1-2 parts initiator, and 100-120 parts water; the stabilizer includes hydroxyethyl-β-cyclodextrin and chitosan quaternary ammonium salt. This technical solution solves the problem of poor temperature and shear resistance in existing emulsion-type fracturing fluid thickeners.

The application relates to the technical field of antistatic agents, and particularly discloses an oil antistatic agent and a preparation method thereof. The oil antistatic agent is prepared from the following raw materials: octadecylamine, modified AMPS, tetraethylammonium chloride, deionized water, double-modified polyether, dimethylbenzene, methanol, a low-temperature stabilizer and an initiator. The modified AMPS is obtained by modifying AMPS with a low-temperature modifier, and the low-temperature modifier comprises glycerol and urea. The double-modified polyether is a product obtained by modifying polyoxyethylene polyoxypropylene ether with ammonia gas and butanol. The antistatic agent has good low-temperature stability and can be well adapted to the oil storage and transportation scene in the winter of the northern alpine region.

This invention discloses a plant-based deodorizer. It comprises the following components in parts by weight: 20-40 parts plant extract, 2-5 parts surfactant, 5-10 parts fragrance, 3-8 parts antibacterial agent, and 80-160 parts water. This plant-based deodorizer effectively removes odors from ambient air and exhibits good antibacterial properties. The combined use of *Pyrrosia lingua* extract and *Gymnocalycium chinense* fruit extract, as well as the combined use of *Yucca sylvestre* extract and *Centella asiatica* extract, enhances the deodorizing effect. The combined use of benzalkonium chloride and octyldecyl dimethyl ammonium chloride enhances the antibacterial effect and provides a synergistic effect.

The application discloses a solid corrosion and bacteria inhibition and scale inhibitor for shale gas well, which is a solid gel particle with calcium alginate as a skeleton, and contains imidazoline phosphate, corrosion and bacteria inhibition inhibitor and synergist in a mass ratio of (10-15):(10-15):(5-10). The imidazoline phosphate is obtained by esterification of phytic acid and imidazoline, and at least one phosphoric group in the phytic acid is esterified with the amino group of the imidazoline. The corrosion and bacteria inhibition inhibitor is a combination of acetylenic alcohol methyl quaternary ammonium salt and dipentadecyldimethylammonium chloride. The application also discloses a preparation method of the solid corrosion and bacteria inhibition and scale inhibitor. The solid corrosion and bacteria inhibition and scale inhibitor for shale gas well can be added into the gas well annulus, and is settled at a set position to protect the well bore. Once added, the solid corrosion and bacteria inhibition and scale inhibitor can long-term improve the problems of bacterial corrosion on the upper part of the well bore string, corrosion caused by carbon dioxide and hydrogen sulfide acidic gas on the lower part of the well bore string, and fouling and under-deposit corrosion caused by high temperature on the lower part of the well bore string.