35 results about "Fatty aldehyde" patented technology

The invention belongs to the field of organic synthesis, and discloses an aldol condensation reaction method and a catalyst thereof.The method comprises the steps that in the presence of a composite catalyst, a substrate 1 and a substrate 2 are subjected to an aldol condensation reaction, after the reaction is finished, an aldol condensation product is collected from reaction products, according to the method, aldol condensation reaction of fatty aldehyde or aromatic aldehyde is catalyzed by adopting the novel composite catalyst, and the method has the advantages of being mild in reaction condition, environmentally friendly, efficient and simple in post-treatment.

The invention discloses 10-hydroxydecanoic acid as well as a preparation method and application thereof, and belongs to the technical field of cosmetics, Candida lipolytica is taken as a fermentation thallus, the Candida lipolytica contains alkane monooxygenase (CYP450), alcohol dehydrogenase (ADH), fatty alcohol oxidase (FAO) and fatty aldehyde dehydrogenase (FALDH), amplification and activation are performed on the Candida lipolytica in a seed culture medium, and the Candida lipolytica is obtained. The method comprises the following steps: inoculating a seed solution into a liquid culture medium, enabling a strain to adapt to a culture environment in advance, reducing strain death caused by environmental mutation after inoculation, inoculating the seed solution into the liquid culture medium, culturing until OD600 is 45-55, realizing high-density enrichment of the strain, being beneficial to increasing the content of CYP450, ADH, FAO and FALDH, adding decane and Tween 80, and enabling the Tween 80 to be capable of increasing the permeability of a cell membrane and increasing the reaction rate, the CYP450 is used for catalyzing decane to carry out hydroxylation, and ADH, FAO and FALDH are used for carrying out oxidation, so that the high-purity 10-hydroxydecanoic acid is obtained.

Provided is a composition capable of suppressing generation of a trimer even when an aliphatic aldehyde at a high concentration of 90 mass% or more is stored at a low temperature. The composition contains 90 mass% or more of an aliphatic aldehyde having 8-16 carbon atoms and 100 ppm or more and 1 mass% or less of an additive with respect to the mass of the aliphatic aldehyde, wherein the additive is one or more selected from the group consisting of polyalkylene glycol derivatives represented by formula (I), sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters, amino acids represented by formula (II), anthranilic acid esters represented by formula (III), and pyrazine derivatives represented by formula (IV).

The invention discloses an N-acylamino acid surfactant and a preparation method thereof, and belongs to the technical field of surfactants, the N-acylamino acid surfactant is prepared by the following steps: adding potassium anilinoacetate, fatty aldehyde and deionized water into a supercritical reactor according to a certain molar ratio, then adding a certain amount of triethylamine phase transfer catalyst, reacting for a period of time under the condition of supercritical nitrogen, and separating out the N-acylamino acid. And filtering the product in the reactor, standing and layering the obtained filtrate, and taking the subnatant to obtain the amino acid surfactant. The fatty aldehyde and the potassium anilinoacetate are subjected to dehydrogenation reaction under the action of the triethylamine phase transfer catalyst to prepare the amino acid surfactant, the reaction is carried out under the condition of supercritical nitrogen, and the supercritical nitrogen not only provides a high-pressure condition for the dehydrogenation reaction, but also has high solubility and high diffusivity, so that the amino acid surfactant is prepared. The raw materials can be fully dissolved, mixed and reacted, and the yield of the amino acid surfactant is high.

The invention discloses an alkyl substituted 1, 4-bis (2-pyridylmethyl)-1, 4-diazane coordination metal peroxide catalyst, a compound catalyst, a preparation method and application, and the general formula of the alkyl substituted 1, 4-bis (2-pyridylmethyl)-1, 4-diazane coordination metal peroxide catalyst is shown in the specification. The composite catalyst comprises an alkyl substituted 1, 4-bis (2-pyridyl methyl)-1, 4-diazane coordination metal peroxide catalyst, a cocatalyst, a regulator, a protective agent and a solvent. The alkyl-substituted 1, 4-bis (2-pyridylmethyl)-1, 4-diazane coordinated metal peroxide catalyst and the compound catalyst can improve the selectivity of the reaction for preparing fatty acid by oxidizing fatty aldehyde, increase the reaction activity, can be repeatedly used, are low in cost, have a relatively high utilization rate, and are particularly suitable for the oxidation reaction of C4-C18 fatty aldehyde.

The application discloses a method for identifying Klebsiella pneumoniae gene circadian rhythm expression by using a bioluminescence reporting system. The application constructs a recombinant bioluminescence Klebsiella pneumoniae driven by a metabolic gene malate:quinone oxidoreductase mqo promoter (Pmqo), and directly observes the change rule of bacterial gene expression under entrainment and free-running conditions of temperature cycle by monitoring the luminescence characteristics. The luxCDABE gene operon comprises genes for coding luciferase and substrate synthesis enzyme, wherein luxA and luxB code for heterodimer luciferase, luxC, luxD and luxE synthesize aldehyde as a substrate for the luciferase luminescence reaction. The luciferase catalyzes the oxidation of aldehyde to generate visible blue-green light with a wavelength of 450-490 nm. The Lux bioluminescence reporting system has the advantages of not needing to add an exogenous substrate and not affecting the normal physiological functions of the host, and can be applied to the identification of Klebsiella pneumoniae gene circadian rhythm expression.

This invention provides a method for efficiently producing aliphatic aldehydes by oxidizing aliphatic primary alcohols having four or more carbon atoms. [Solution] A method for producing an aliphatic aldehyde, comprising the step of oxidizing an aliphatic primary alcohol having 4 or more carbon atoms with molecular oxygen in the presence of a ruthenium-supported catalyst, The ruthenium-supported catalyst comprises ruthenium supported on a carrier, The aforementioned support is a porous oxide, The surface area per unit mass of ruthenium is 60 m². 2 / g or more The mesopore volume of the ruthenium-supported catalyst is 0.15 mL / g or more. A method for producing aliphatic aldehydes.

The invention belongs to the new technical field of white spirit brewing, and particularly relates to a method for accelerating aging of white spirit through a hydrothermal synergistic electro-catalysis process, which specifically comprises the following steps: introducing newly-brewed white spirit into an aging container, carrying out electro-catalysis treatment, selecting titanium-plated platinum as an electrode material, and carrying out hydrothermal reaction synergistic treatment at the same time; after electro-catalysis treatment, constant-temperature water bath treatment is conducted, the operation is repeated for 3-5 times, and the treatment interval is 30-50 min. The content of acetal in the white spirit treated by the method is increased, the content of ester substances such as ethyl hexanoate and ethyl acetate is obviously increased, and irritant components such as low-grade saturated fatty aldehyde and fusel oil are reduced. The treated white spirit has the aroma of aged white spirit, tastes soft and soft, contains typical aromatic odor of the white spirit, has prominent flavor and is mellow and pleasant during drinking, and is equivalent to natural ageing for 1-3 years, so that the ageing period of the white spirit is greatly shortened, and the ageing cost of the white spirit is reduced.

The invention provides a method for separating cis-trans isomers of astaxanthin. The method comprises the following steps: P1, packing and balancing; p2, sample loading: dissolving an astaxanthin raw material in a sample loading solvent, filtering, and loading filtrate to the top end of the chromatographic column balanced in the step P1; p3, gradient elution: carrying out staged elution by using a first elution solvent, a second elution solvent and a third elution solvent in sequence, and collecting effluent in a staged manner; p4, separation and purification; the amido-functionalized silica gel adsorbent takes porous silica gel as a matrix, and the surface of the porous silica gel is bonded with a steric hindrance amido functional group formed by a reductive amination reaction of branched chain fatty aldehyde and an aminopropyl silanization group. According to the method, the silica gel adsorbent with the steric hindrance amino functional group and an optimized stage elution procedure are designed to have a synergistic effect, and high-efficiency and high-selectivity synchronous separation of the astaxanthin cis-trans isomers is realized on conventional chromatographic equipment.

The present application relates to temperature sensitive indicating material, cold chain monitoring and biomedical packaging technical field, specifically relates to a kind of temperature indicator based on polyvinyl acetal polymer white type.It is specifically technical scheme that the high temperature indicator includes temperature sensitive indicating layer, the temperature sensitive indicating layer includes modified polyvinyl acetal polymer, the modified polyvinyl acetal polymer is prepared by acetalization reaction of polyvinyl alcohol and aliphatic aldehyde.This application solves the problems of high cost, not intuitive, difficult to characterize cumulative heat exposure history and difficult to grade severity in the existing vaccine temperature monitoring mode.

The present application relates to a kind of high crosslinking macroporous resin of adsorbing macromolecular toxin and its preparation method, belong to blood perfusion adsorption resin technical field.The preparation method described in the present application includes: (1) the styrene monomer, polyvinyl crosslinking agent, pore-forming agent and initiator are mixed as oil phase, dispersant, surfactant, salt and pure water are mixed as water phase, oil phase is dispersed in water phase under stirring condition to prepare O / W emulsion, suspension polymerization reaction is carried out by heating, polystyrene-based white ball is obtained, washing, extraction, drying;(2) polystyrene-based white ball is swelled, then fatty aldehyde and lewis acid catalyst are added, reaction is carried out, and the product is washed and dried.The high crosslinking macroporous resin described in the present application has larger specific surface area, excellent biocompatibility, can adsorb protein binding class toxin such as macromolecular toxin in blood;The present application simultaneously provides preparation method, green and environmental protection.

The invention provides a green synthesis method of an alpha-aminoketone compound based on visible light catalytic oxidation amination reaction, and belongs to the technical field of organic chemical synthesizing.According to the method, aliphatic aldehyde and secondary amine which are low in price and easy to obtain serve as raw materials, oxygen serves as a green terminal oxidizing agent, and the alpha-aminoketone compound is synthesized under normal temperature and visible light irradiation. The alpha-aminoketone compound is efficiently synthesized in one step through oxidative amination reaction catalyzed by organic photosensitizers such as rhodamine 6G and anthraquinone. According to the method, a noble metal catalyst and a stoichiometric oxidant are abandoned, the reaction condition is mild (room temperature), the operation is simple and convenient, the substrate application range is wide, and the method shows excellent compatibility to functional groups including various complex cyclic secondary amines (such as natural product derivatives of nornicotine, cytisine and the like); compared with the prior art, the method has the advantages that important transformation from thermal activation to light activation is realized on the reaction mechanism, and a novel green way which is more economical and environment-friendly and is easy for large-scale production is provided for synthesis of alpha-aminoketone.

This invention provides a method for producing aliphatic aldehydes in high yield by oxidizing aliphatic primary alcohols having four or more carbon atoms. [Solution] A method for producing an aliphatic aldehyde, comprising the step of oxidizing an aliphatic primary alcohol having 4 or more carbon atoms with molecular oxygen in the presence of an N-oxyl compound and / or an N-oxide compound and a metal-supported catalyst, The metal-supported catalyst includes a metal supported on an inorganic support, A method for producing an aliphatic aldehyde, wherein the N-oxyl compound and / or N-oxide compound is one or more selected from the group consisting of compounds represented by general formula (I), compounds represented by general formula (II), and compounds represented by general formula (III). [Formula 1] JPEG2026104778000025.jpg37124

The invention provides non-naturally occurring microbial organisms having a formaldehyde fixation pathway, a formate assimilation pathway, and / or a methanol metabolic pathway in combination with a fatty alcohol, fatty aldehyde, fatty acid or isopropanol pathway, wherein the microbial organisms selectively produce a fatty alcohol, fatty aldehyde or fatty acid of a specified length or isopropanol. The microbial organisms provided advantageously enhance the production of substrates and / or pathway intermediates for the production of chain length specific fatty alcohols, fatty aldehydes, fatty acids or isopropanol. In some aspects, the microbial organisms of the invention have select gene disruptions or enzyme attenuations that increase production of fatty alcohols, fatty aldehydes or fatty acids. The invention additionally provides methods of using the above microbial organisms to produce a fatty alcohol, a fatty aldehyde, a fatty acid or isopropanol.

Described are methods for preparing a deuterated aldehyde using with a photocatalyst and a hydrogen atom transfer agent in a H2O free solvent comprising D2O and an organic solvent under an inert gas. The methods may be used to convert a wide variety of aldehydes (e.g., aryl, alkyl, or alkenyl aldehydes) to C-1 deuterated aldehydes under mild reaction conditions.

The application provides a method for preparing naphthoquinone compounds by selectively oxidizing naphthyl aromatic hydrocarbons with molecular oxygen, and belongs to the technical field of fine chemicals. The method uses Co-based catalysts to selectively oxidize naphthyl aromatic hydrocarbons with molecular oxygen to prepare naphthoquinone compounds in the presence of fatty ethers or fatty aldehydes. The Co-N-C composite material used in the method is obtained by mixing an inorganic metal salt and an organic nitrogen-containing compound to obtain a precursor, and then calcining the precursor in an inert atmosphere at a certain temperature. The conversion rate of naphthyl aromatic hydrocarbons is more than 80%, and the selectivity of naphthoquinone compounds is more than 75%. The application uses molecular oxygen as an oxidant, and the catalytic reaction conditions are relatively mild and the reaction is safer. In the oxidation system, the naphthyl aromatic hydrocarbons mainly undergo C-H bond oxygenation reaction on the naphthalene ring, which is a new system for synthesizing naphthoquinone compounds.

The disclosure provides a polyvinyl acetal preparation method, a polyvinyl acetal film and a preparation method and application thereof. The polyvinyl acetal preparation method comprises the following steps: adding an acidic catalyst and a first amount of aliphatic aldehyde into a polyvinyl alcohol solution to perform a first-stage reaction at a temperature of 20-30 DEG C, to obtain a first mixture; cooling the first mixture to 5-15 DEG C at a cooling rate of 5 DEG C / min, adding a second amount of aliphatic aldehyde, and performing a second-stage reaction to obtain a second mixture; heating the second mixture to 50-80 DEG C to perform a third-stage reaction, to obtain a third mixture; adjusting the pH value of the third mixture to terminate the reaction, to obtain a polyvinyl acetal with a ratio of meso configuration and racemic configuration of 3.6-6.0, and the mass ratio of the total amount of polyvinyl alcohol, acidic catalyst and aliphatic aldehyde is (10-50):(5-25):(5-15), the total amount of aliphatic aldehyde is the sum of the first amount and the second amount, the first amount accounts for 10-50% of the total amount of aliphatic aldehyde, and the second amount accounts for 50-90% of the total amount of aliphatic aldehyde.

The application discloses a method for preparing fatty acid and fatty alcohol from fatty aldehyde, which comprises the following steps: S1: reacting a mixture I containing a first catalyst and fatty aldehyde to obtain a fatty acid ester; S2: reacting a mixture II containing the fatty acid ester obtained in S1 and a second catalyst to obtain a fatty acid and a fatty alcohol; the fatty aldehyde is at least one of C4-C10 fatty aldehyde; the first catalyst is an aluminum catalyst supported by a polystyrene resin containing an amino acid functional group; and the second catalyst is a strong acidic cation exchange resin. The method has the advantages of mild reaction condition, good operation safety, simultaneous preparation of the fatty acid and the fatty alcohol, continuous reaction and high efficiency.

The invention discloses polyvinyl acetal resin as well as a preparation method and application thereof. The polyvinyl acetal resin is prepared from the following raw materials: polyvinyl alcohol, an acid catalyst, fatty aldehyde, alkyl substituted benzaldehyde and caustic soda liquid. A small amount of alkyl substituted benzaldehyde is compounded with main fatty aldehyde, so that the intrinsic glass-transition temperature of the resin is remarkably increased on the premise of not excessively sacrificing processability and toughness; fatty aldehyde is added step by step in the preparation process, so that the functional monomer can be effectively connected into a polymer chain; alkyl on alkyl substituted benzaldehyde is a hydrophobic non-polar group, so that the polarity of the whole aldehyde molecule is reduced, and the solubility parameter of the aldehyde molecule is better matched with that of a general non-polar / weak-polar plasticizer, so that the long-term compatibility of the resin and the plasticizer is remarkably improved; the problems of plasticizer precipitation, film atomization and adhesion stress reduction in a high-temperature and high-humidity environment are effectively prevented.

The invention relates to a lubricating oil additive and a preparation method thereof, and the preparation method of the additive comprises the following steps: (1) preparation of Mannich base containing 5-chlorobenzotriazole: adding 5-chlorobenzotriazole, organic amine and a solvent into a reactor, simultaneously adding fatty aldehyde or aromatic aldehyde, uniformly stirring and mixing, heating to 50-100 DEG C, carrying out gas stripping to remove water, continuously reacting for 3-9 hours, filtering, washing, and drying to obtain the Mannich base containing 5-chlorobenzotriazole; carrying out reduced pressure distillation to remove the solvent to obtain Mannich base containing 5-chlorobenzotriazole; (2) preparation of a multifunctional additive: adding the Mannich base of 5-chlorobenzotriazole in the step (1) and a solvent into a reaction container, uniformly stirring and mixing, adding alkyl sulfonate, heating to 80-130 DEG C, carrying out reflux reaction for 3-6 hours, adding deionized water after the reaction is completed, separating an oil-water phase, and evaporating to remove the solvent to obtain the lubricating oil additive; wherein the molar ratio of the Mannich base of the 5-chlorobenzotriazole to the alkyl sulfonate in the step (2) is 1: (0.1-0.5); the additive containing the benzotriazole alkyl sulfonic acid derivative and the Mannich base of the 5-chlorobenzotriazole is synthesized, is applied to lubricating oil, has excellent oil solubility and excellent corrosion resistance, rust resistance and wear resistance, and is a lubricating oil additive with excellent comprehensive performance. The preparation process is simple, the reaction conditions are mild, the used raw materials are cheap and easy to obtain, and the synthesis yield is high.

Belonging to the technical field of lubricating oil, the invention relates to a wind power gear lubricating oil composition, which comprises the following components by weight: 97-99% of base oil, 0.01-0.7% of an extreme pressure anti-wear agent, 0.04-0.6% of an antioxidant, 0.2-0.5% of a metal deactivator, 0.01-0.1% of an antirust agent, 0.005-0.05% of an antifoaming agent, and 0.005-0.05% of a demulsifier. The preparation method of the metal deactivator comprises the following steps: (1) adding chlorobenzotriazole, organic amine and a solvent into a reactor, simultaneously adding fatty aldehyde or aromatic aldehyde, uniformly stirring and mixing, heating to 50-100 DEG C, removing water by gas stripping, continuously reacting for 3-9 hours, and removing the solvent by reduced pressure distillation to obtain a Mannich base containing chlorobenzotriazole; and (2) adding the Mannich base of chlorobenzotriazole in the step (1) and a solvent into a reaction container, uniformly stirring and mixing, adding alkyl sulfonate, heating to 80-130 DEG C, carrying out reflux reaction for 3-6 hours, adding deionized water after the reaction is completed, separating an oil-water phase, and evaporating to remove the solvent to obtain the metal deactivator. Wherein the molar ratio of the Mannich base of the chlorobenzotriazole to the alkyl sulfonate in the step (2) is 1: (0.1-1); the wind power gear lubricating oil can effectively solve the problems of micro pitting corrosion resistance, friction reduction and corrosion inhibition of a wind power gear box.

The invention relates to the technical field of adsorption materials, in particular to a fatty aldehyde removal material, a preparation method thereof and a filter element, the preparation method comprises the following steps: mixing a nitrogen-containing heterocyclic ring with a first solvent to prepare a first solution; mixing alicyclic / long-chain alcohol with a second solvent to prepare a second solution; dropwise adding the second solution into the first solution, and stirring to prepare a prefabricated ligand solution; adding metal salt into the prefabricated ligand solution to prepare a ligand solution; adding an antioxidant into the ligand solution to prepare a complexing solution; adding the carrier into the complexing solution, dispersing, evaporating, and roasting in a protective atmosphere; wherein the metal salt comprises oxidation driving salt, adsorption activating salt and acid adjusting salt. The fatty aldehyde removal material prepared by the preparation method can efficiently remove odor substances such as nonanal and the like, has good stability and can keep a stable removal effect for a long time.

The present application belongs to the technical field of high-toughness chitosan-based film, and relates to a chitosan-based film, a preparation method and application thereof. The preparation method of the high-toughness chitosan-based film comprises the following steps: uniformly mixing a chitosan solution and a water-soluble polymer solution to obtain a mixed solution A; casting the mixed solution A on a carrier surface; and contacting the cast mixed solution A with a fatty aldehyde to perform a cross-linking reaction, so as to obtain a gel film, and drying the gel film to obtain the high-toughness chitosan-based film. The chitosan-based film prepared by adopting the technical scheme of the present application has a tensile strength of up to 92.3 MPa, an elongation at break of up to 121.5%, and a toughness of up to 69.4 MJ / m 3 2, which effectively improves the toughness of the chitosan-based film. In addition, after chemical cross-linking and constraint drying, the barrier property of the film is significantly improved, the water vapor and oxygen transmission coefficients are reduced, and the film has higher flatness.

This invention provides a method for producing aliphatic aldehydes in high yield by oxidizing aliphatic primary alcohols having four or more carbon atoms. [Solution] The present invention is a method for producing an aliphatic aldehyde, comprising the step of oxidizing an aliphatic primary alcohol having 4 or more carbon atoms with molecular oxygen in the presence of an amine compound and a metal-supported catalyst, wherein the metal-supported catalyst contains a metal supported on an inorganic carrier, and the amine compound is a compound represented by general formula (I). JPEG2026104782000016.jpg15159

The application relates to the technical field of long-chain fatty acid preparation, and discloses a catalyst for oxidizing long-chain fatty aldehyde to prepare long-chain fatty acid as well as a preparation method and application of the catalyst. The catalyst has a structure shown in formula I: wherein X1 is a heteroatom or an acyl group containing a heteroatom; M is an alkali metal element; and A is a nanoparticle, and A is selected from SiO2 or Fe3O4. The nanoparticle is modified by being rich in a hydroxyl group, a mercapto group or an amino group on the surface, and then is contacted with a lactone, an acid anhydride compound or a diacid compound to react, so that the catalyst containing the nanoparticle and containing a carboxyl group is obtained. The preparation method is simple and easy to operate, and separation is simple; the catalyst has high catalytic efficiency, high selectivity and high conversion rate for products, the yield of the fatty acid can reach more than 93%, and the homogeneous catalyst can be recycled.

The application relates to a nitrogen atom doped mesoporous nanosphere and a preparation method thereof, and belongs to the technical field of new nanomaterials. A kind of surfactant is used as co-template agent, and nanomicelles are constructed through the synergistic effect between the two kinds of surfactants; melamine and aromatic amine-acid are used as main raw materials, and a fatty aldehyde is introduced to form a Schiff base intermediate between the fatty aldehyde and the aromatic amine-acid; after the melamine is added to the Schiff base intermediate, the melamine is crosslinked into a melamine-based oligomer; the nanomicelles and the oligomer are synergistically co-assembled to form a composite polymer nanosphere; after separation and washing treatment, a nitrogen atom doped mesoporous polymer nanosphere is obtained; and after high-temperature pyrolysis treatment in an inert atmosphere, a nitrogen atom doped mesoporous carbon nanosphere is obtained. The method has the advantages of low cost, simple operation, controllable process, mild process conditions, realization of the construction of the mesoporous structure of the target product, facilitation of large-scale commercial production and application, and promotion of the practical application process of the nitrogen atom doped mesoporous nanosphere.

This invention provides a method for producing aliphatic aldehydes in high yield by oxidizing aliphatic primary alcohols having four or more carbon atoms. [Solution] A method for producing an aliphatic aldehyde, comprising the step of oxidizing an aliphatic primary alcohol having 4 or more carbon atoms with molecular oxygen in the presence of a phenol derivative and a metal-supported catalyst, wherein the metal-supported catalyst includes a metal supported on an inorganic carrier. A method for producing an aliphatic aldehyde, wherein the phenol derivative is a compound represented by general formula (I). JPEG2026104779000037.jpg27159

The application discloses a small-size high-viscosity microemulsion pressure drive integrated system and application. The small-size high-viscosity microemulsion pressure drive integrated system comprises the following components: 1.75-5.85% of amphiphilic high-molecular surfactant, 2.25-10.15% of auxiliary surfactant, 42.00-48.00% of water and 42.00-48.00% of oil. The preparation method of the amphiphilic high-molecular surfactant comprises the following steps: S1, preparing an organic acid aqueous solution of a polysaccharide compound and adding a short-chain alcohol; S2, adding an alcohol solution of a fatty aldehyde into the system; S3, adding a short-chain alcohol-water solution in which a reducing agent is dissolved into the system in multiple times; and S4, adding an alkali solution into the system until the pH value reaches 8-12. The microemulsion pressure drive integrated system has a wide source of raw materials, is green and environment-friendly, is small in size and can smoothly enter low-permeability and ultra-low-permeability reservoir pores, has high-viscosity characteristics, and has excellent fracturing characteristics, shear resistance and sand carrying performance, so that the purpose of efficient displacement is achieved, and the oil recovery rate of low-permeability and ultra-low-permeability reservoirs is improved.

[Problem] The purpose of the inventors of the present invention is to provide instant noodles having good texture, saltiness and frying aroma even when the content of sodium is reduced. [Solution] The present inventors conducted intensive research on a substance for mitigating the reduction of flavor that occurs when the sodium content of soup base used for instant noodles is reduced. The present inventors have found that it is possible to provide instant fried noodles having an excellent salty taste and a good frying aroma while suppressing the amount of sodium used by containing 2-acetyl-1-pyrroline, and have completed the invention. In addition, it is recognized that the flavor improving effect is enhanced by adding an aliphatic aldehyde or isothiocyanate to 2-acetyl-1-pyrroline.

The present disclosure describes compositions comprising a fatty alcohol, a fatty aldehyde, and an N-alkoxyamine. The present disclosure further describes N-alkoxyamines and their use as markers for determining whether a particular process has been used.