32 results about "Mannich base" patented technology

The invention relates to a method for detecting a clearing agent main agent in gasoline, and the method comprises the following steps: carrying out thin-layer chromatography detection on a to-be-detected sample, and determining the composition of the clearing agent main agent in the concentrated to-be-detected sample according to color spot distribution on an obtained thin-layer chromatography plate, wherein the clearing agent main agent comprises one or more of a polyether amine clearing agent, a polyisobutene amine clearing agent and a Mannich base clearing agent; the thin-layer chromatography detection sequentially comprises developing and developing treatment; a developing agent for developing comprises one or more of a developing agent I, a developing agent II and a developing agent III; the developing solvent I is methanol, and the developing solvent II and the developing solvent III comprise one or more of alcohol with the carbon atom number of 1-6, aliphatic hydrocarbon with the carbon atom number of 5-12 and cycloalkane with the carbon atom number of 5-12. According to the method provided by the invention, whether the clearing agent main agent is added into the sample to be detected or not can be rapidly determined, and the type of the clearing agent main agent can be rapidly and accurately detected.

The application relates to the field of CO2 utilization and storage technology, and discloses a double Mannich base corrosion inhibitor as well as a preparation method and application thereof. The method is carried out under the condition that the pH is 3-4; the method comprises the following steps: (1) in the presence of ethanol, a compound shown in formula (A) is subjected to a first reaction with 1,3,5-trioxane to obtain an intermediate product; in formula (A), R is -(CH2)7CH=CH(CH2)7CH3; (2) in the presence of ethanol, the acetophenone is added dropwise into the intermediate product to carry out a second reaction, so that the double Mannich base corrosion inhibitor is obtained; the dropwise speed of the acetophenone is 0.0125-0.05 mL / s relative to 1 mol of the compound shown in formula (A); wherein the molar ratio of the compound shown in formula (A), the acetophenone and the 1,3,5-trioxane is 1:2.0-2.3:2.0-2.3. Formula (A).

The invention relates to the technical field of CO2 utilization and storage, and discloses a bis-Mannich base corrosion inhibitor as well as a preparation method and application thereof. The method is carried out under the condition that the pH is 3-4. The method comprises the following steps: (1) in the presence of ethanol, carrying out first reaction on a compound as shown in a formula (A) and 1, 3, 5-trioxane to obtain an intermediate product; in formula (A), R is-(CH2) 7CH = CH (CH2) 7CH3; and (2) in the presence of ethanol, dropwise adding acetophenone into the intermediate product for a second reaction to obtain the bis-Mannich base corrosion inhibitor, the dropping rate of acetophenone is 0.0125-0.05 mL / s relative to 1 mol of the compound as shown in the formula (A); wherein the molar ratio of the compound shown in the formula (A) to the acetophenone to the 1, 3, 5-trioxane is 1: (2.0-2.3): (2.0-2.3). Formula (A).

This invention belongs to the field of coolant technology, specifically relating to a coolant and its application in an immersion liquid-cooled energy storage system. The coolant, by weight, comprises 80-95 parts base oil, 1-5 parts thermally conductive nanoparticles, 0.5-2 parts composite dispersant, 0.3-1 part composite corrosion inhibitor, 0.1-0.5 parts antioxidant, 0.2-0.5 parts pour point depressant, and 0.01-0.05 parts defoamer. The base oil is a mixture of polyalphaolefin and synthetic ester, and the composite dispersant is a compound of polyisobutylene succinimide and Mannich base dispersant. Aging tests show that this coolant exhibits high thermal conductivity retention, low acid value increase, and low corrosion rate. The coolant of this invention can effectively maintain the dispersion stability of nanoparticles in the environment of precipitates from sealing materials, extending the fluid change cycle.

The application belongs to the technical field of polyurethane grouting materials, and discloses a high polymer grouting material capable of being rapidly cured in a low-temperature environment, which is formed by mixing A component and B component, and the content of each component is as follows in terms of weight fraction: A component: 100 parts of polymethylene polyphenyl polyisocyanate; B component: 35 parts of polyether polyol A, 15 parts of polyester polyol B, 5-15 parts of Mannich base, 10 parts of flame retardant, 1.5 parts of foaming catalyst, 0.5 parts of gel catalyst, 0.5 parts of surfactant, 5 parts of physical foaming agent, 1.0 parts of chemical foaming agent and 5 parts of plasticizer. The Mannich base curing agent is added to the B component during preparation of the two-component polyurethane grouting material, and is uniformly mixed with other materials, so that the high polymer grouting material can be rapidly cured in a low-temperature environment.

This invention discloses a novel method for preparing a clean fuel additive, relating to the field of clean fuel additive technology. Its components include: a main cleaning agent: Mannich base; a dispersant: polyetheramine; a surfactant: highly active polyisobutylene; an antioxidant: N,N-di-sec-butyl-p-phenylenediamine; an octane booster: dimethyl carbonate; a solvent: 120# solvent oil; a combustion improver: C9-C11 mixed olefins; a stabilizer: trimethylolpropane; an ignition promoter: nitrobenzene; and auxiliary additives: n-dodecane, sodium polystyrene sulfonate, and eugenol methyl ether. This invention achieves a significant synergistic effect among the core components such as Mannich base, polyetheramine, polyisobutylene, amine antioxidants, and dimethyl carbonate. This synergistic effect allows the additive to comprehensively optimize the cleanliness, anti-knock properties, stability, and combustion efficiency of fuel at a relatively low total addition amount.

The invention relates to the technical field of corrosion inhibitors in the pickling industry, in particular to a preparation method and application of a Mannich base thiadiazole quaternary ammonium salt corrosion inhibitor for methanesulfonic acid pickling. According to the method, amino thiadiazole is modified by Mannich, quaternization is further performed, and the thiadiazole corrosion inhibitor with the advantages of Mannich base and quaternary ammonium salt is obtained. Quaternary ammonium salt groups in corrosion inhibitor molecules endow the corrosion inhibitor with good water solubility, and the dispersity and adsorbability of the corrosion inhibitor in an acid solution are improved; thiadiazole ring, thioamide and the like contained in the corrosion inhibitor contain N and S atom groups, so that coordination with metal is facilitated, and the adsorption performance of the corrosion inhibitor is improved; and the tail alkyl chain can effectively isolate corrosive substances from being in contact with a metal matrix. The preparation method is simple in synthesis step and low in raw material cost, and the obtained corrosion inhibitor is excellent in corrosion inhibition effect. Under the condition of 353 K, the highest corrosion inhibitor efficiency on Q235 steel in methanesulfonic acid with the molar concentration of 0.5 M reaches 99.8%.

The invention relates to the technical field of pesticides, and discloses a slow-release herbicide and a preparation method thereof. Carboxymethyl cellulose is used as a matrix, acrylic acid and Mannich base modified nano silicon dioxide are used as monomers, modified cellulose-based hydrogel is prepared through a graft copolymerization method under the action of an imidazoline modified cross-linking agent, herbicide composite dispersion liquid and the modified cellulose-based hydrogel are mixed, freeze drying is performed, and the slow-release herbicide is obtained. Nitrogen atoms in an imidazoline group, a pyrrolidone group and a Mannich base structure are used as hydrogen bond receptors, so that hydrophilic sites of the cellulose-based hydrogel are increased, and the water retention capacity is improved; the modified nano silicon dioxide is used as an inorganic nano filler and is uniformly dispersed in a hydrogel network, rigid particles of the nano silicon dioxide can be used as physical crosslinking points to support a flexible network formed by cellulose molecular chains, network collapse in the swelling process is reduced, the porosity is increased, the water storage space is enlarged, and the water retention capacity is improved.

This invention relates to the field of epoxy resin composite materials technology, specifically to an environmentally friendly epoxy resin composite material for the lining of fructose syrup storage and transportation tanks and its preparation method. The composite material of this invention consists of bisphenol F type epoxy resin, a flexible curing agent, nano-antibacterial reinforcing fillers, and additives. The flexible curing agent is a dimer acid-polyetheramine-cashew phenol Mannich base condensation polymer, and the nano-antibacterial reinforcing filler is nano-TiO2@ε-polylysine-silane coupling agent hybrid particles. The composite material of this invention possesses excellent flexibility, acid resistance, antibacterial properties, and low water absorption; it also exhibits strong adhesion, no migration of heavy metals or toxic organic antibacterial agents, and meets food contact safety regulations, making it suitable for the lining protection of fructose syrup storage and transportation tanks.

A curing agent composition, comprising a) 10-60 wt. %of a Mannich base, or / and an epoxy adduct, b) 20-70wt. %of a polyamide curing agent based on a polyamine and a multifunctional fatty acid; and c) 10-30 wt. %of 1-naphthol, or / and 2-naphthol; and optionally an accelerator and optionally an organic solvent. An amine-epoxy composition, a cured product produced from the amine-epoxy composition, an article of manufacture, use of the curing agent composition as a hardener for an epoxy resin, and use of the curing agent composition to prepare a curing agent of an epoxy resin are also provided.

According to the polyphenol-doped cardanol-based Mannich base type anticorrosive epoxy curing agent and the preparation method thereof, natural polyols such as resveratrol and the like are introduced, the crosslinking efficiency is effectively improved through rich phenolic hydroxyl groups of the natural polyols, and the natural polyols and cardanol cooperate to construct a rigid-tough balanced compact three-dimensional network; therefore, the mechanical strength and corrosion resistance of the coating are remarkably enhanced. The curing agent is adjustable in structure and good in compatibility with waterborne epoxy, main raw materials are derived from renewable resources, the curing agent has high performance and environmental protection characteristics, and a new direction is provided for development of waterborne epoxy anticorrosive coatings.

A fluorescent Mannich base for use as an epoxy resin hardener which comprises a Mannich base, and a fluorophore where the Mannich base comprises a amine nitrogen bonded to an SP3 hybridised carbon whi

The application relates to the field of oil and gas development, and discloses a Mannich base quaternary ammonium salt compound, a preparation method of the compound, an acid corrosion inhibitor, acid liquid and application of the acid liquid. The compound has the structure shown in formula (1): wherein R1 and R2 are each independently selected from hydrogen, C1-C5 linear alkyl and C3-C5 branched alkyl; and X is selected from one or more of F, Cl and Br. The corrosion inhibitor system has high temperature resistance and excellent corrosion inhibition performance, so that the corrosion resistance of oil and gas exploitation equipment can be improved, and the safety, stability and efficiency of the oil and gas exploitation process can be improved.

The invention relates to a class of amido-amines useful as curatives and having a high degree of biological based carbon content. In particular, the invention is directed to compounds comprising at least one amide group and at least one Mannich base, polymeric compounds comprising a repeating unit having at least one amide group and at least one Mannich base, a resin curative composition comprising such compounds, processes for preparing them and uses thereof. In one aspect, the present invention provides a compound of formula (1) below, wherein A, Y, Y1, Z, Z1, x, y, n, m, R and R1 are as defined herein.

This invention belongs to the field of acidizing technology in oil and gas field development, and discloses a Mannich base quaternary ammonium salt corrosion inhibitor for ultra-high temperature well acidizing and its preparation method. The corrosion inhibitor is composed of 35%~55% by mass of a novel Mannich base quaternary ammonium salt, 30%~60% by mass of an organic solvent, and 5%~15% by mass of a corrosion inhibitor synergist. The novel Mannich base quaternary ammonium salt has a specific molecular structure and is synthesized by reacting modified aromatic aldehydes, aromatic ketones, and organic secondary amines. Its molecular skeleton incorporates rigid groups and long-chain hydrophobic groups, which can form a dense adsorption film on the metal surface and significantly improve thermal stability. The corrosion inhibitor of this invention exhibits excellent corrosion inhibition performance in an ultra-high temperature acidic environment of 200℃, solving the problems of easy decomposition and non-dense adsorption film of existing corrosion inhibitors at high temperatures.

The present application belongs to the field of gasoline additives for vehicles, and particularly relates to a high-efficiency composite gasoline additive and a preparation method thereof. The high-efficiency composite gasoline additive comprises the following components: a detergent 30-60%, a dispersant 10-20%, a demulsifier 1-5%, a corrosion and rust inhibitor 1-5%, and solvent oil in a residual amount. The detergent comprises Mannich base and polyether amine, and the mass ratio of the two substances is 8:9-7:5. The additive has a small injection amount, and has a good cleaning effect on both simulated intake valves and combustion chamber deposits. The additive can significantly reduce the emission of environmental gas pollutants.

The invention relates to the technical field of engine oil, in particular to engine oil which comprises the following components in parts by weight: 100 parts of hydrogenated base oil, 5-10 parts of a purification dispersant, 0.2-1.2 parts of an antioxidant, 2-8 parts of an anti-wear agent and 1.7-4.2 parts of a metal deactivator, the purification dispersant is styrene modified polyisobutene phenol Mannich base quaternary ammonium salt. The lubricating oil can effectively reduce generation of sediments, prevents engine abrasion, and is low in viscosity and not prone to blockage.

The invention discloses a corrosion inhibitor for aggravated acid acidification in an oil and gas well yield increasing technology, a preparation method and application, the structural formula of the corrosion inhibitor for acidification is shown in the following formula I, in the formula I, X is halogenated group, R1 is phenyl and alkyl substituted phenyl, and R2 is naphthyl and substituted naphthyl. The corrosion inhibitor provided by the invention has the structures of Mannich base and quaternary ammonium salt, and retains amino of the Mannich base, so that the corrosion inhibitor has the performance of the Mannich base, has the dual advantages of the Mannich base and the quaternary ammonium salt corrosion inhibitor, has a good corrosion inhibition effect on metal equipment, and can adapt to enhanced corrosion of a heavier-density aggravated acid solution and inorganic salt. Compared with the existing corrosion inhibitor used in the conventional acid environment, the corrosion inhibitor has obvious advantages. And the corrosion inhibitor has a large benzene ring in the structure, so that a formed film is more compact and the corrosion resisting effect is better when the corrosion inhibitor is used as the corrosion inhibitor.

The present application relates to the technical field of adsorbent, and discloses a composite adsorbent for removing vitamin E mineral oil and a preparation method thereof.The methoxy of a naphthyl cyclohexyl modified silane coupling agent is subjected to dealcohol condensation reaction with the silicon hydroxyl on the surface of coarse pore silica gel to realize covalent grafting, so that modified coarse pore silica gel is obtained; the terminal hydroxyl of a hydroxyalkyl modified mannich base monomer is subjected to esterification reaction with the carboxyl on the surface of carboxylated coconut shell granular activated carbon to realize covalent fixation, so that modified coconut shell granular activated carbon is obtained; the composite adsorbent for removing vitamin E mineral oil is formed by matching acidified attapulgite and silica sol adhesive; the composite adsorbent has excellent synergistic adsorption effect on MOSH and MOAH in vitamin E, and improves the recovery rate of vitamin E.

This invention relates to the field of fertilizer technology and discloses a biomass fertilizer for improving the soil environment and its preparation method. The invention uses lignin graft copolymer and modified sodium alginate as raw materials, and prepares a composite hydrogel using the calcium ion in-situ gelation method. Biochar, urea, and potassium dihydrogen phosphate are then added to the hydrogel to obtain a biomass fertilizer for improving the soil environment. The pyrrole groups in the lignin graft copolymer and the nitrogen atoms in the Mannich base structure act as hydrogen bond acceptors, enhancing the hydrogen bonding with the hydrogel molecular chains and improving the water retention capacity of the fertilizer. The rigid structure of lignin itself also plays a role in the gel network, reducing the collapse of the cross-linked network, thereby forming a richer three-dimensional porous structure and enhancing the water retention capacity of the fertilizer. Quaternary ammonium salt groups can disrupt the bacterial cell membrane structure, leading to the extravasation of bacterial substances and enhancing the antibacterial effect of the fertilizer. Thiourea groups can bind to enzymes within bacterial cells, exerting an antibacterial effect.

The application discloses a kind of carbon dioxide corrosion inhibitor based on mannich base and its preparation method and application, belong to petroleum chemical industry metal material protection technical field.Main agent mannich base is with 3-amino crotonitrile, 3-hydrazine quinoline, phenylacetone, cinnamaldehyde as main, it is prepared by condensation, mannich two-step reaction, its structure is as shown in formula A.The inhibitor includes by mass percentage:mannich base A 30~40%, alkylamine 8~16%, potassium iodide 0.3~0.6%, surfactant 10~20%, organic solvent 30~60%.Mannich base A synthesis is simple, post-treatment is convenient, molecule contains quinoline, pyrazole, carbonyl, double bond, phenyl functional group simultaneously, can be well adsorbed on carbon steel surface and form dense protective film to prevent the invasion of corrosive medium.Add alkylamine, potassium iodide, surfactant, organic solvent, water solubility increases after compounding, corrosion inhibition effect is enhanced.The corrosion inhibitor has the characteristics such as small amount, high efficiency, wide application range, and has wide application prospect in oil and gas production.

The invention relates to the technical field of oilfield development, in particular to a purine Mannich base corrosion inhibitor, a completion fluid and preparation and application of the purine Mannich base corrosion inhibitor and the completion fluid. The preparation method of the purine Mannich base corrosion inhibitor comprises the following steps: adding aldehyde, ketone and purine into methanol, fully mixing and dissolving, adding concentrated hydrochloric acid into a reaction system, adjusting the pH value of the reaction system to 1-4, and carrying out Mannich reaction; and after the Mannich reaction is finished, cooling the reaction system to room temperature, removing the solvent in the system, recrystallizing and filtering to obtain the purine Mannich base corrosion inhibitor. The purine Mannich base corrosion inhibitor can adapt to the high-temperature condition of 200 DEG C or above, and has important significance on well completion operation of high-temperature deep wells and ultra-deep wells.

The invention discloses a composite phosphorus-free corrosion and scale inhibitor as well as a preparation method and application thereof, and relates to the technical field of scale inhibitor materials. The preparation method comprises the following steps: firstly, carrying out Mannich reaction on formaldehyde, bis (methoxysilylpropyl) amine and 7-hydroxycoumarin-3-carboxylic acid ethyl ester in an ethanol medium to prepare coumarin Mannich base, and then carrying out grafting reaction on the coumarin Mannich base and allyl glycidyl ether in methanol to prepare grafted coumarin Mannich base; finally, the intermediate, acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid are copolymerized in deionized water with ammonium persulfate-ferrous sulfate as a redox initiation system, and the composite phosphorus-free corrosion and scale inhibitor is prepared, has efficient corrosion and scale inhibition performance, can achieve comprehensive protection on carbon steel, brass and stainless steel, and has good corrosion and scale inhibition performance. The scale inhibitor is suitable for working conditions of high-hardness and high-alkalinity industrial circulating water, is phosphorus-free and environment-friendly, effectively overcomes the defects that a traditional phosphorus-free agent is single in function, poor in synergism, unstable in structure and poor in inhibition effect on scale types difficult to treat, and is excellent in industrial applicability.

This invention discloses an acid corrosion inhibitor for carbon steel, its preparation method, and its application, belonging to the field of chemical corrosion protection technology. The invention uses Mannich base as the main agent and sulfur-containing polyamino acids as synergists, mixed with a solvent. Addressing the technical problems of existing acid corrosion inhibitors, such as increased costs due to high concentrations, and the presence of hazardous chemicals, costly surfactants, and foaming components in their formulations, this invention uses a small-molecule Mannich base and a long-chain sulfur-containing polyamino acid to construct a structure with multiple adsorption sites (N, O, and benzene ring adsorption sites on the Mannich base molecule and S, N, and O adsorption sites on the sulfur-containing polyamino acid molecular chain) and strong adsorption capacity (S has strong electronegativity). This allows for the formation of a robust and stable corrosion inhibitor adsorption film in high-temperature, strongly acidic environments, achieving excellent slow-release effects without pitting corrosion.

The present application relates to a kind of Mannich base compound and its new use, specifically, the present application relates to the Mannich base compound as shown in general formula I, and the pharmaceutical composition of the compound or their pharmaceutical salt, as cholinesterase inhibitor for preparing the drug for treating and / or preventing, alleviate Alzheimer's disease, myasthenia gravis or its combination.

The invention discloses a high-water-content shield muck-in-water material and a preparation method thereof, and relates to the technical field of shield muck-in-water materials. The invention discloses a high-water-content shield residue soil water-in-water material, which contains shield residue soil and a curing agent accounting for 10-20% of the mass of original state residue soil, the curing agent comprises Portland cement, quartz sand powder and other components, and the core is hyperbranched anionic polyacrylamide. The polyacrylamide is subjected to RAFT polymerization to prepare a hyperbranched skeleton, and then the hyperbranched skeleton is modified by 2-acrylamide-2-methylpropanesulfonic acid Mannich base. The material can efficiently wrap water to solidify high-water-content muck, the strength and corrosion resistance of a solidified body are improved, muck recycling is achieved, and the problems that traditional treatment is high in cost and low in utilization rate are solved.

An unleaded gasoline fuel composition for improving engine performance in spark ignition internal combustion engines comprises: a major amount of gasoline base fuel, and a detergent additive package, wherein the detergent additive package comprises a quaternary ammonium internal salt detergent and a Mannich base detergent mixture, wherein the quaternary ammonium internal salt is obtained from amines or polyamines that is substantially devoid of any free anion species, wherein the Mannich base detergent mixture comprises a first Mannich base detergent component derived from a di- or polyamine and a second Mannich base detergent component derived from a monoamine, wherein the weight ratio of the first Mannich base detergent to the second Mannich base detergent mixture ranges from about 1:6 to about 3:1, and wherein the weight ratio of the quaternary ammonium internal salt detergent and the Mannich base detergent mixture ranges from about 1:10 to about 1:100.

The application provides a bio-based Mannich base, a preparation method thereof, an application thereof, and a TDI curing agent prepared by using the bio-based Mannich base as a catalyst. The bio-based Mannich base is obtained by a Mannich reaction of natural phenol, dimethylamine and formaldehyde, wherein the natural phenol is one or more selected from the group consisting of sesamol, catechin, theaflavin, daidzein and procyanidin. The Mannich base catalyst prepared by using the natural phenol in the application improves steric hindrance, and the reaction selectivity of small molecule monomers can be improved through the steric hindrance effect. The content of free TDI monomers in the TDI curing agent can be reduced by adding the catalyst at one time, so that the free monomers in the prepared TDI curing agent are less than 0.5% advantageously.

This invention relates to the field of water treatment technology and discloses a water treatment agent for oilfield reinjection water and its preparation method. The invention obtains the water treatment agent for oilfield reinjection water by copolymerizing quinoline modified with sulfonic acid imidazoline quaternary ammonium salt, chitosan modified with Mannich base, acrylic acid, and sodium hypophosphite. Quaternization modification of imidazoline improves its water solubility and corrosion inhibition properties. The quaternary ammonium salt imidazoline can be adsorbed on metal surfaces, reducing the corrosion rate and acting as a surfactant to wet and disperse, accelerating the scale removal rate. The sulfonic acid group improves temperature resistance, prevents gel formation, and its strong hydrophilicity allows the molecular chain to fully extend in water, improving scale inhibition performance. Introducing Mannich base into chitosan improves its acid solubility and temperature resistance. The conjugation effect of the aromatic ring strengthens the coordination chelation effect of chitosan, improving the corrosion inhibition effect. Multiple functional groups exert a synergistic effect, further enhancing the corrosion and scale inhibition effects.

This invention relates to the field of coating preparation technology and discloses a high-solids epoxy paint and its preparation method. The epoxy paint uses bisphenol-type epoxy resin as a matrix, compounded with modified mica iron oxide, grafted graphene, and metal-organic framework nanocrystals as synergistic fillers, supplemented with reactive diluents, special additives, and Mannich base-modified phenolic amine curing agents. First, the mica iron oxide is surface-modified with silane, and the graphene oxide is grafted with glycidyl ether. Then, metal-organic framework nanocrystals are prepared by a solvothermal reaction of metal salts and 2-aminoterephthalic acid. Subsequently, the three modified fillers are mixed with resin, diluent, and additives through stepwise high-speed shearing. Finally, the mixture is stirred evenly with a curing agent to obtain the high-solids epoxy paint. This improves the coating's salt spray corrosion resistance, adhesion, and mechanical hardness, providing a stable and durable protective system suitable for corrosion protection of metal structures in harsh corrosive environments such as marine and chemical plants.