94 results about "Tetradecane" patented technology

The application belongs to the technical field of oil and gas field development, and provides a phase permeability improver, a fracturing fluid system containing the same, and respective preparation methods and applications. The phase permeability improver is obtained by copolymerization and hydrolysis of acrylamide AM, a functional monomer 2-acrylamido-2-methylpropanesulfonic acid AMPS, and cationic hydrophobic monomers A and B; the cationic hydrophobic monomer A is at least one of tetradecyl dimethyl allyl ammonium chloride, hexadecyl dimethyl allyl ammonium chloride, and octadecyl dimethyl allyl ammonium chloride; the cationic hydrophobic monomer B is at least one of methacryloyloxyethyl trimethyl ammonium chloride, acryloyloxyethyl trimethyl ammonium chloride, and acryloyloxyethyldimethyl benzyl ammonium chloride; the phase permeability improver and the fracturing fluid system containing the same can significantly reduce the water phase permeability after fracturing operation, while having a smaller influence on the oil phase permeability, and have a significant effect of stabilizing oil and controlling water, and can significantly improve the stable production effect of fracturing operation in a low-permeability oil reservoir.

The invention discloses a phycomycete symbiotic system and application of the phycomycete symbiotic system in treatment of aquaculture tail water, and belongs to the technical field of tail water treatment. The phycomycete symbiotic system comprises chlorella, scenedesmus and activated sludge, and the initial inoculation dry weight ratio of the chlorella to the scenedesmus to the activated sludge is 1: 1: 6. And exogenously adding octanoyl-L-homoserine lactone or tetradecanoyl-L-homoserine lactone into the phycomycetes symbiotic system, so as to construct the phycomycetes symbiotic system with enhanced functions. On the basis of a mixed algae-bacteria symbiotic system with an optimized ratio, directional enhancement of functions is realized by virtue of quorum sensing signal molecules, the stability and resistance gene interception capability of the quorum sensing signal molecules under the stress of antibiotics are verified, and finally efficient purification of the aquaculture tail water is realized. According to the invention, the blank of the prior art in the aspects of advanced regulation and control of a phycomycete synergistic mechanism and synergistic treatment of emerging pollutants is filled up.

The invention relates to anti-abnormal-sound low-noise ABS (acrylonitrile butadiene styrene) and a preparation method thereof. The anti-abnormal-sound low-noise ABS is prepared from the following raw material components: ABS resin, modified ceramic hollow microspheres, modified polyacrylate and auxiliaries, wherein the modified ceramic hollow microspheres are polymers obtained by grafting hydroxylated ceramic hollow microspheres with KH-570 and then polymerizing the grafted hydroxylated ceramic hollow microspheres with sodium acrylate; the modified polyacrylate is obtained by polymerizing sodium acrylate, butadiene, styrene and tetradecyl acrylate. According to the invention, the ABS resin, the modified ceramic hollow microspheres and the modified polyacrylate are compounded; compared with the prior art, the composite material disclosed by the invention has the advantages of good compatibility among various components, high bonding strength, effective reduction of noise and abnormal sound, guarantee of the mechanical strength of the composite material, solving of the problems in the prior art, and good application prospect.

The invention discloses a high-salt-tolerance structured fracturing fluid and a preparation method thereof, and the fracturing fluid is prepared by taking a flowback fluid as a base fluid and adding a high-molecular polymer and a macromolecular surfactant. Wherein the high-molecular polymer is prepared by polymerizing five monomers, namely acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, a hydrophobic monomer A, sodium p-styrenesulfonate and N-vinyl pyrrolidone; the hydrophobic monomer A is long-chain alkyl quaternary ammonium salt. The macromolecular surfactant is prepared by polymerizing five monomers, namely acrylamide, butyl acrylate, acrylic acid, a hydrophobic monomer B and sodium p-styrenesulfonate; the hydrophobic monomer B is selected from at least one of 2-(acrylamide) sodium dodecyl sulfonate, 2-(acrylamide) sodium tetradecanesulfonate and 2-(acrylamide) sodium hexadecanesulfonate. The fracturing fluid prepared by adopting the flowback fluid or saline water with the total mineralization degree of 85,000 as the base fluid still keeps good viscosity, and good salt resistance and sand-carrying performance are guaranteed.

Described herein are methods of synthesizing 1, 6-diazabicyclo [4.4. 4] tetradecane-1, 6-onium (in-DBD) cationic structures, methods of integrating in-DBD cationic structures into polymers, and the use of in-DBD polymers in electrochemical applications, such as anion exchange membranes (AEM). The configuration of the in-DBD enables the in-DBD to carry cationic charges through stable protons in an aliphatic cage formed by a three-dimensional structure of the in-DBD, and the in-DBD is anchored between two nitrogen atoms through symmetrical hydrogen bonds in bridgeheads. Through the synthesis method of in-DBD and the application thereof in various scenarios, an organic cation-hydroxide is realized that remains stable at extremely low hydration levels and high temperatures (80 DEG C, RHlt; 10%) and shows hydroxide stability several orders of magnitude higher than that of conventional cations.

Double-layer composite microcapsules suitable for asphalt surface layers that are both self-repairing, have high energy storage, and are resistant to ice and snow, as well as their preparation method and application, relate to a microcapsule preparation method and its application. The invention aims to address the technical problems of existing self-repairing microcapsules for asphalt pavements, such as poor core material release and self-healing effects, unstable shell wall materials, low thermal conductivity, easy leakage, and single functionality. The double-layer composite microcapsules of the present invention are composed, from the inside to the outside, of an inner phase-change microcapsule core, an inner phase-change microcapsule shell, an outer self-repairing microcapsule core, and an outer self-repairing microcapsule shell; the inner phase-change microcapsule core is prepared using n-octanoic acid and tetradecane; the inner phase-change microcapsule shell is prepared using carbon nanotubes and a double polymer; the outer self-repairing microcapsule core is prepared using bio-oil and carbon nanotubes; and the outer self-repairing microcapsule shell is prepared using carbon nanotubes and a double polymer. Compared to ordinary asphalt pavement, the healing index of the asphalt pavement surface layer prepared using the double-layer composite microcapsules is increased by 8.1% to 26.3%. It can be used in the highway field.

The invention discloses a collecting agent for flotation of picromerite at high temperature and application of the collecting agent, the collecting agent is alkyl benzene sulfonic acid isopropanolamine salt, specifically any one of dodecyl benzene sulfonic acid isopropanolamine salt, tetradecyl benzene sulfonic acid isopropanolamine salt and hexadecyl benzene sulfonic acid isopropanolamine salt; the collecting agent is mainly used for recovering picromerite through flotation at high temperature, the floatability of picromerite can be effectively enhanced, and the flotation recovery rate is increased. By adding the collecting agent in stages, non-selective adsorption of the collecting agent on the surface of non-target minerals can be reduced, the problem that the grade of picromerite flotation concentrate is low in high-temperature weather is solved, and efficient recovery of picromerite in the high-temperature environment in summer is achieved.

The invention discloses a waste lithium ion battery recycling method, and belongs to the technical field of recycling of waste lithium ion batteries. The method comprises the following steps: leaching the positive electrode powder of the waste lithium ion battery in a deep eutectic solvent, and carrying out solid-liquid separation to obtain a leaching solution rich in heavy metals; the eutectic solvent is prepared from shikimic acid, catechol and tetradecyl dimethyl benzyl ammonium chloride. The deep-eutectic solvent is adopted for leaching, the leaching rate of nickel, cobalt, manganese and other heavy metals can be increased, meanwhile, leaching of impurity metals is avoided, and then it is avoided that a large amount of waste water is generated due to impurity removal. The metal ions and the eutectic solvent are separated by using the ion exchange resin, so that the eutectic solvent is recovered and can be repeatedly used, and the pure metal solution is obtained.

The invention belongs to the field of water treatment, and more particularly to a positively charged quaternary ammonium salt polymer catalyst and its preparation method and application. The catalyst provided by the present invention is made of a positively charged quaternary ammonium salt precursor through polymerization and anion exchange, and the positively charged quaternary ammonium salt precursor is the reaction product of acrylate and halogenated alkane; the acrylate is one or more of dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate and 3 (dimethylamino) ethyl acrylate; the halogenated alkane is one or more of undecane bromide, dodecane bromide, tetradecane bromide, hexadecane bromide, eicosane bromide, dodecane chloride, tetradecane chloride and hexadecane chloride. The catalyst provided by the present invention has good stability and antibacterial properties, can efficiently and selectively catalyze the degradation of organic pollutants by peroxide, has important practical significance for removing wastewater rich in organic pollutants, and has a wide range of applications in water pollution control and water environment restoration.

The invention provides an aqueous solution with a diamine component, wherein said diamine component consists of least 75 to 100 weight-% based on the total weight of the diamines in the aqueous solution of 5-N-carboxamido-2-pyrrolidone-N-n-dodecyl propane-1,3-diamine, also referred to as Py-C12, or at least 35 weight-% of 5-N-carboxamido-2-pyrrolidone-N-n-tetradecyl propane-1,3-diamine, also referred to as Py-C14 for attaching said diamine to a material, wherein the solution has a pH of 8 or less and does not comprise a solubilizer. These solutions are particularly useful as biocides. In a related aspect, the invention provides a method for attaching a diamine component according to the invention to a material.

The application provides a crude oil direct oiling type spinning oil, a preparation method and application. The crude oil direct oiling type spinning oil comprises 65-75% of a composite smoothing agent, and the composite smoothing agent is composed of tetradecyl tetradec-9-enoate 25-35 parts and PEG-12 dipalmitate 65-75 parts. The composite smoothing agent is composed of specific compounds, so that the spinning oil can have smoothness, oil film strength and heat resistance; meanwhile, the friction coefficient of the yarn can be reduced and the uniformity of the yarn can be improved, and the quality of the yarn is good.

The invention provides a crude oil direct oiling type spinning oil agent, a preparation method and application, the crude oil direct oiling type spinning oil agent comprises 65-75% of a composite smoothing agent, and the composite smoothing agent is composed of 25-35 parts of tetradecyl tetradecane-9-olefine acid ester and 65-75 parts of PEG-12 dipalmitate. Specific compounds are selected to form the composite smoothing agent, so that the spinning oil agent has smoothness, oil film strength and heat resistance at the same time; meanwhile, the friction coefficient of the yarn can be reduced, the uniformity of the yarn is improved, and the yarn quality is good.

The invention discloses a foam drainage agent with hydrate inhibition performance and a preparation method and application thereof. The foam drainage agent provided by the invention is prepared from PVCap-TBA and a betaine compound, the PVCap-TBA is prepared from N-vinyl caprolactam and tert-butyl acrylate, and the PVCap-TBA is prepared from N-vinyl caprolactam The betaine compound is selected from two or more of cocamidopropyl betaine, dodecyl dimethyl betaine and tetradecyl dimethyl betaine, and the betaine compound is compounded by two or more of cocamidopropyl betaine, dodecyl dimethyl betaine and tetradecyl dimethyl betaine. The foam drainage agent provided by the invention has the advantages of hydrate inhibition performance, low temperature resistance, hypersalinity resistance, methanol resistance and the like, can effectively perform drainage gas recovery construction in a deep sea shaft, and ensures that natural gas in the deep sea shaft can be continuously and stably produced.

This invention relates to the application of 5-(tetradecoxy)-2-furoic acid (TOFA) in the preparation of drugs that inhibit osteoclast differentiation and function. Using a RANKL-induced mouse bone marrow macrophage osteoclast differentiation model, experiments demonstrated that TOFA can effectively inhibit osteoclast differentiation and function by inhibiting ROS and downregulating the expression of key osteoclast differentiation and function proteins such as Nfatc1, Src, and Ctsk. Furthermore, TOFA at concentrations of 40 μM and below showed no significant cytotoxicity, proving that TOFA can serve as a candidate compound for developing drugs that inhibit osteoclast differentiation and function, and for treating diseases caused by excessive activation of osteoclasts, thus possessing significant clinical application value. Additionally, by constructing a mouse ovariectomized osteoporosis model, the preventive and therapeutic effects of TOFA on estrogen-deficiency-induced osteoporosis were demonstrated.

To provide a bee repellent in order to prevent damage to honeybees, which are not the intended target of pesticides applied to crops or pesticides used to control carnivorous bees such as hornets and paper wasps. [Solution] A bee repellent comprising one or more components selected from tetradecane, furfuryl alcohol, cinnamyl alcohol, cinnamaldehyde, 3-methyl-2-butenal, methyl cinnamate, geranyl formate, allyl cyclohexanepropionate, isoquinoline, borneol, carvacrol, δ-dodecalactone, β-ionone, quinoline, butylamine, and citronella oil as active ingredients.

Disclosed herein are compounds of Formula (I) having protective group of ketal used as intermediates for preparing 2-((1H-pyrrolo[2,3-b]pyridin-5-yl)oxy)-N-((4-((((1r,4r)-4-hydroxy-4-methylcyclohexyl)methyl)amino)-3-nitrophenyl) sulfonyl)-4-(2-((S)-2-(2-isopropylphenyl) pyrrolidin-1-yl)-7-azaspiro[3.5]nonan-7-yl)benzamide (Sonrotoclax), and processes for preparing compounds of Formula (I), especially 1,5-dioxa-11-azadispiro[5.1.5.1]tetradecane.

The invention discloses a fluorescent probe for detecting the viscosity of a cell membrane as well as a preparation method and application of the fluorescent probe, and belongs to the technical field of small molecule probes. The structural formula of the fluorescent probe is shown in the specification. The preparation method specifically comprises the following steps: (1) reacting 4-diethylaminoketonic acid and cyclohexanone in concentrated sulfuric acid, pouring into crushed ice, stirring, adding perchloric acid, stirring, standing and filtering; (2) dissolving 4-diethylaminobenzaldehyde in absolute ethyl alcohol, heating and refluxing, removing the solvent, and carrying out chromatography; and (3) dissolving benzotriazole-N, N, N ', N'-tetramethylurea hexafluorophosphate and N, N-diisopropylethylamine in N, N-dimethylformamide, stirring at normal temperature, adding a compound 43-(tetradecyl amino) propane-1-sulfonate, continuously stirring, removing the solvent, and carrying out chromatography to obtain the compound 43-(tetradecyl amino) propane-1-sulfonate. The fluorescent probe has excellent anchoring and imaging capabilities and viscosity-triggered near-infrared (NIR) fluorescence response characteristics, can be used for fluorescence imaging of cell membrane viscosity, and can also be used for viscosity imaging analysis of breast cancer mice.

The invention provides a marine fungus-derived petroleum degrading enzyme, a gene A6006 and application thereof, belongs to the crossing field of biological enzyme technology and environmental remediation, and provides the marine fungus-derived petroleum degrading enzyme, the amino acid sequence of which is shown as SEQ ID NO.2. The gene A6006 of the marine fungus-derived petroleum degrading enzyme has the advantages that the gene A6006 of the marine fungus-derived petroleum degrading enzyme has the advantages that the gene A6006 of the marine fungus-derived petroleum degrading enzyme has the advantages that the gene A6006 of the marine fungus-derived petroleum degrading enzyme can be used for degrading petroleum; the nucleotide sequence of the gene after being optimized by an escherichia coli codon is shown as SEQ ID NO. 1; the marine fungus-derived petroleum degrading enzyme provided by the invention can degrade dodecane, tridecane, tetradecane, pentadecane, hexadecane, heptadecane, octadecane, hexadecanoic acid, naphthalene, phenanthrene and pyrene; and the degradation effect on tetradecane, hexadecane and naphthalene is better.

The application belongs to the technical field of medicine synthesis, and particularly relates to a preparation method of a key intermediate of plerixafor. The preparation method of the plerixafor intermediate 1,4,8,11-tetraazacyclotetradecane provided by the application uses N,N'-di(2-hydroxyethyl)-1,3-propanediamine as a starting material, hydroxyl is first activated by sulfuric acid, then ring formation is carried out under alkaline conditions, and then 1,3-propanediamine is used for ring opening, ring expansion and ring closure to obtain 1,4,8,11-tetraazacyclotetradecane. The process effectively avoids the introduction and removal of Ts-protecting groups by changing the reaction conditions, is simple to operate, shortens the reaction steps, and reduces the production working hours. The whole synthesis method is simple to operate and suitable for industrial production.

The invention belongs to the technical field of energy, and in particular relates to a biological blended fuel which comprises the following components: methyl palmitate, octadecane-9. 12-dienoic acid methyl ester, cis-11-octadecenic acid methyl ester, 2-methyl undecane, 3-methyl undecane, 3, 6-dimethyl decane, 3.7-dimethyl decane, 3, 8-dimethyl-undecane, 3, 8-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, the preparation method comprises the following steps: adding 1, 10-methyl eicosane, 2, 5-dimethyl dodecane, 5-methyl tridecane, 4-methyl-tridecane, 2-bromododecane, 3-methyl-5-propyl nonane, 3-methyl-tetradecane, n-nonane, 6-methyl undecane, 2, 5-dimethyl decane, C16H34, 5-methyl-tetradecane, 7-methyl heptadecane, 4-methyl tetradecane, 3-methyl-tetradecane and 2.5-dimethyl tridecane into a reaction kettle; methyl tetradecane, n-pentadecane and tetradecane; according to the invention, 10-methyleicosane and 5-methyltetradecane are used for providing a high volume calorific value, and the flame temperature is improved compared with that of common biodiesel.

The invention discloses a non-irritant multipurpose long-acting degerming liquid, which is prepared from the following ingredients in percentage by mass: 0.1 to 0.5 percent of cationic polymer antibacterial agents, 1 to 4 percent of quaternary ammonium salt surfactants A, 0.5 to 2 percent of quaternary ammonium salt surfactants B, 1.5 to 5 percent of polyhydric alcohol humectants, 0.1 to 2 percent of alcohol solvents, 0.3 to 1 percent of plant natural polyphenols and 0.5 to 2 percent of optional essence. And the balance of deionized water. Wherein the cationic polymer antibacterial agent is preferably selected from polyhexamethylene biguanide hydrochloride (PHMB), and the quaternary ammonium salt surfactant is preferably selected from dodecyl dimethyl benzyl ammonium chloride (DDBAC) and tetradecyl dimethyl benzyl ammonium chloride (TDBAC). The benzalkonium chloride and the PHMB biguanide system are perfectly combined, efficient sterilization and disinfection are achieved, and meanwhile the long-acting antibacterial effect is achieved. The product contains natural plant components such as sugarcane essence, can effectively neutralize acidic peculiar smells such as sweat smell and foot odor, realizes zero irritation, and is especially suitable for people with sensitive skin and alcohol allergy.

The invention relates to a composite water control agent and application thereof. The composite water control agent comprises a polymeric monomer, nano silicon dioxide, an emulsifier, an initiator and water. Wherein the polymeric monomers are acrylic acid, acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, 2-acrylamido tetradecane sulfonic acid and a surface and interface modified monomer; and the surface and interface modification type monomer is 3-methacryloyloxypropyltriethoxysilane.

The application belongs to the technical field of medicine synthesis, and particularly relates to a preparation method of 1,4,8,11-tetraazacyclotetradecane. The preparation method is characterized in that 1,3-dibromopropane and cycloethylamine are used as starting materials to react, and then the obtained intermediate is subjected to ring opening, ring expansion and cyclization by 1,3-propanediamine to obtain 1,4,8,11-tetraazacyclotetradecane. The process effectively avoids the introduction and removal of Ts-protecting groups by changing the reaction conditions, is simple to operate, shortens the reaction steps, and reduces the production time. The whole synthesis method is simple to operate and suitable for industrial production.

A double-layer composite microcapsule with self-repairing, high energy storage and ice and snow resistance, as well as its preparation method and application, is intended to solve the technical problems of the existing microcapsule phase change materials being prone to leakage, having a single source of heat energy, and achieving monotonous functions. The double-layer composite microcapsule of the present invention is composed of an inner phase change microcapsule core, an inner phase change microcapsule shell, an outer self-repairing microcapsule core, and an outer self-repairing microcapsule shell from the inside to the outside; wherein the inner phase change microcapsule core is composed of n-octanoic acid and tetradecane; the outer self-repairing microcapsule core is a mixture of hydrophobic hexamethylene diisocyanate and carbon nanotubes; the inner and outer phase change microcapsule shells are a mixture of carbon nanotubes and a double polymer, and the double polymer is prepared from polyvinyl alcohol and methylated hexahydroxymethyl melamine resin; first prepare an inner high energy storage phase change microcapsule, then add it to the outer microcapsule core solution, and then add it dropwise to the outer microcapsule shell solution to form a double-layer composite microcapsule; use the microcapsule to prepare a coating, which can be used in the field of coating self-repair and ice and snow resistance.

Provided herein are polymorphs and their salts, methods of making these, compositions and pharmaceutical compositions containing these, kits containing these, and method of treating disease or conditions in a subject with the polymorphs, their salts, and compositions and pharmaceutical compositions containing these.

The invention discloses a thermoelectric material based on annealing-doping collaborative optimization and a preparation method thereof. The preparation method comprises the following steps: (1) dispersing carbon nanotubes in a poly (2, 5-bis (3-tetradecyl thiophene-2-yl) thieno [3, 2-b] thiophene) solution to obtain a suspension; and drying to remove the solvent and then carrying out annealing treatment. By constructing a continuous and stable carbon nanotube conductive network, the interface charge transfer barrier caused by PBTTT aggregation is eliminated, effective decoupling of S and sigma in the thermoelectric material is realized, and the inherent trade-off effect of S and sigma is broken. The preparation method provided by the invention has both process feasibility and performance superiority, and has potential application value.

The invention discloses a preparation method of a high-hardness transparent powder coating. The high-hardness transparent powder coating is prepared from 78%-83% of acrylic polyester, 10%-20% of a curing agent, 0.6%-1.2% of a flatting agent, 0.6%-1.2% of a breathable agent, 1%-3% of nano filler, 0.3%-0.5% of benzoin, 0.2%-0.5% of transparent degassing wax, 0.2%-0.5% of a dispersing agent and 0.1%-0.3% of an anti-settling agent. Wherein the curing agent is melted and ground tetradecanedioic acid, and the nano filler is nano silicon dioxide coated with a KH550 or KH560 silane coupling agent; the preparation method comprises the following steps: mixing and dispersing the acrylic polyester subjected to vacuum drying with other components, performing melt extrusion through a double-screw extruder, cooling, crushing and grading; tetradecanedioic acid is used as a curing agent and is fused and ground, and nano silicon dioxide is coated with a silane coupling agent, so that the crosslinking density and interfacial compatibility of the powder coating are remarkably improved; tetradecanedioic acid enables the reaction activity of the nano filler and acrylic polyester to be higher, meanwhile, the problem that traditional filler is prone to agglomeration is effectively solved through coating of the silane coupling agent on the nano filler, and the mechanical strength and light transmittance of the coating are directly enhanced.

This invention relates to the field of superhydrophobic anti-icing coating technology, specifically to a low-temperature phase change microcapsule superhydrophobic anti-icing coating and its preparation method. The specific technical solution is as follows: The preparation process involves ultrasonically dispersing superhydrophobic low-temperature phase change microcapsules in an organic solvent, adding an adhesive and a curing agent to the dispersion, stirring at room temperature, uniformly coating a composite layer onto a substrate, and curing to obtain the low-temperature phase change microcapsule superhydrophobic anti-icing coating. This invention utilizes a tetradecane / dodecyl alcohol binary eutectic phase change core material as an energy storage core material, and forms low-temperature phase change microcapsules by coating silica with interfacial polymerization, thereby achieving permanent curing of the core material, preventing leakage, and extending service life. After superhydrophobic modification, the superhydrophobic low-temperature phase change microcapsules are composited with polydimethylsiloxane to prepare a composite coating with superhydrophobic and latent heat release properties, achieving the purpose of anti-icing.

According to the method for treating the lithium precipitation mother liquor based on eutectic solvent extraction-precipitation, trioctylphosphine oxide and tetradecyl phosphoric acid are mixed to form a eutectic solvent system, trioctylphosphine oxide serves as a hydrogen bond acceptor, and the property of an eutectic solvent extraction-precipitation agent is regulated and controlled. Compared with an extraction-precipitation strategy of single tetradecyl phosphoric acid, by introducing trioctylphosphine oxide, the particle size of the precipitate is remarkably increased, an organic solvent is prevented from being used in the reverse extraction process, and meanwhile, the high-selectivity precipitation capacity of tetradecyl phosphoric acid TDPA to lithium is kept. The lithium can be enriched without isopropyl ether in the reverse extraction process, so that the isopropyl ether evaporation process in the extraction-precipitant circulation process is reduced, the overall energy consumption is reduced, and meanwhile, the performance attenuation of the extraction-precipitant caused by isopropyl ether oxidation is also avoided.

The present application provides a naphtha directional adsorption separation method, and relates to the technical field of petroleum chemical industry.The present application adopts a double desorption agent process flow, uses stronger adsorption force between high carbon alkanes (n-dodecane, n-tetradecane or n-hexadecane) and adsorbents, solves the problems of incomplete desorption of low carbon alkanes desorption agent and low separation yield, and thus significantly improves the separation efficiency of the process.Meanwhile, the use of low carbon alkanes (n-pentane or n-hexane) to replace high carbon alkanes on the adsorbents can avoid the residue of high carbon alkanes on the adsorbents, and affect the recycling of the adsorbents.The present application adopts the double desorption agent process flow, which can ensure high separation efficiency and improve the utilization rate of the adsorbents at the same time.The present application can efficiently separate n-alkanes in naphtha, and the separated n-alkanes can be used as high-quality cracking ethylene (propylene) raw materials;the adsorption residual oil rich in isomeric alkanes, naphthenes and aromatic hydrocarbons can be used as high-quality catalytic reforming aromatic hydrocarbon raw materials.