157 results about "Isooctanes" patented technology

The subject of the present disclosure is an aviation gasoline composition that is lead-free and free of oxygenated compounds meeting the specifications of the ASTM standard comprising isopentane, isooctane, and (alkyl)aromatics. The aviation gasoline composition according to the disclosure may be obtained simply and economically from a mixture of hydrocarbon bases usually available in a refinery.

The invention discloses a preparation method of polyacrylic acid hollow microgel. According to the preparation method, an oil phase is added into a water phase, triethylamine and tetraethoxysilane are dropwise added under an alkaline condition to carry out in-situ hydrolysis to generate nano-silica particles as a surfactant, and a stable 'oil-in-water' form Pickering emulsion is generated; polyacrylonitrile is incompatible with isooctane, so that raw monomer droplets are subjected to phase separation, and isooctane is extruded to the centers of the droplets of a mini-emulsion to form liquid cores; after monomers are polymerized, polyacrylonitrile hollow microspheres are obtained and are subjected to basic hydrolysis to generate the polyacrylic acid hollow microgel. The preparation method has the advantages that the process is simple, the operation is feasible, reaction conditions are mild and easy to control, the consumption of the surfactant is reduced, and the preparation method is applicable to industrial production and is environment-friendly. The prepared polyacrylic acid hollow microgel is stable in structure and controllable in hollow size and can be applied to the fields of medicine controlled release, chemical separation, biosensing and the like.

Processes for making alkylate gasoline compositions that are more “green” and alkylate gasoline compositions containing “green” renewable naphtha and iso octane are described. Exemplary processes for making alkylate gasoline compositions that are more “green” and compositions of alkylate gasoline compositions containing “green” renewable naphtha, iso octane and iso pentane are described. Such compositions allow a higher mixing ratio of the renewable naphtha and / or a higher Research Octane Number (RON), Motor Octane Number (MON) and vapour pressure compared to not adding a combination of iso-octane and iso-pentane.

The invention discloses a method for quickly preparing high-content zanthoxylum unsaturated amide components. The method comprises the following steps: (1) adding a low-polar solvent into zanthoxylum oleoresin serving as a raw materials, stirring and filtering to obtain solid residues; (2) adding one or more of hexane, cyclohexane and isooctane into the solid residues, heating, performing reflux extraction, and filtering; (3) freezing and crystallizing the filtrate at minus 10- minus 20 DEG C; (4) washing and filtering the crystal, purging and drying in high-purity nitrogen at negative 5-5 DEG C to obtain high-content zanthoxylum unsaturated amide components. According to the method, application of column chromatography in the prior art can be avoided, the high-content unsaturated amide components can be quickly and effectively prepared, and the method is simple and reliable at low cost. Mass spectrum identifies that the prepared crystal sanshool and isomerides, the content detected by high-performance liquid chromatography is over 95 percent, and the crystal can meet basic requirements for reference substance application in the aspects of content detection, quality evaluation and the like.

The invention relates to the field of archaeological detection and discloses a preparation method of a bombyx mori silk fibroin monoclonal antibody. The preparation method comprises the following steps: extracting bombyx mori silk fibroin by adopting an isooctane, n-octyl alcohol, bi(2-ethylhexyl) sodium sulfosuccinate and polyvinyl pyridine quaternary ammonium salt mixed system, injecting the bombyx mori silk fibroin serving as a complete antigen into the bodies of rabbits, selecting the rabbits with high immunizing potency, fusing splenic lymphocytes and myeloma cells, cultivating the obtained hybridoma cells, selecting strains with positive secretory antibodies, high secretion ability and good cell growth state by an indirect ELISA method, cloning by a limited dilution method until the antibody secretion positive rate of hybridoma cell growth is 100 percent, performing big turn production on the screened cells, and purifying the obtained monoclonal antibody by a chromatographic column. The antibody prepared by the method has high specificity, and is simple and rapid in operation during the application process and high in detection accuracy.

The invention relates to an extraction tower and a process for removing methanol from residual C4 of an etherification reaction. The extraction tower comprises a tower body which is internally provided with a plurality of supporting beams; each group of supporting beams corresponds to one layer of tower plate in parallel; a plurality of grooves are formed in each supporting beam at intervals; liquid flow holes communicated with the adjacent lower layer of tower plate are formed in the bottom surfaces of the grooves; each layer of tower plate is formed by splicing a plurality of secondary tower plate pieces; the supporting beams in each two adjacent groups are arranged in a staggered manner; a washing liquid inlet is formed in the upper part of the tower body and a C4 inlet is formed in the lower part of the tower body; a gas-phase outlet is formed in the tower top, and a liquid-phase outlet is formed in the tower bottom. Desalted water which is taken from the outside and has the temperature of 35-45 DEG C enters the tower body from the washing liquid inlet through a desalted water pump, residual C4 of the etherification reaction, which has the temperature of 35-45 DEG C, enters the tower body from the C4 inlet, and the flow ratio of the washing liquid to residual C4 of the etherification reaction is 1 to (20-25). Methanol in mixed C4 with the low methanol content can be removed and the content of methanol in processed mixed C4 is not more than 50ppm so that the consumption amount of a sulfuric acid catalyst in an isooctane device, the energy consumption of the device and the amount of waste acids can be reduced.

The invention discloses a super-hydrophilic / underwater super-oleophobic copper net and a preparation method thereof, and application of the super-hydrophilic / underwater super-oleophobic copper net inseparation of emulsified oil-in-water. The preparation method comprises the following steps: ultrasonically cleaning a copper net with acetone, ethyl alcohol and deionized water separately, and then drying the copper net; preparing a composite dip-coating solution of polydopamine, polyethyleneimine and aminated carbon nanotubes; immersing the whole pre-cleaned copper net into the dip-coating solution; then putting the whole dip-coating solution system including the copper net on a shaking table for horizontal-rotary coating operation; and taking out the copper net, cleaning the copper net withdeionized water, and drying the copper net. The preparation method has the advantages of simple preparation technology, low raw material consumption, mild reaction conditions and harmlessness to theenvironment, and the obtained super-hydrophilic / underwater super-oleophobic copper net is resistant to physical wear and chemical corrosion and has the function of quickly and efficiently separating various emulsified oil-in-water such as methylbenzene, petroleum ether, isooctane and 1,2-dichloroethane.

The invention discloses a method of rapidly and quantitatively analyzing 48 amino acids. A derivatization reagent combination for quantitatively analyzing and detecting an amino acid content by a derivatization HPLC-MS / MS method is provided, and comprises a derivatization reagent A and a derivatization reagent B; the derivatization reagent A is a mixed solution of n-propanol and 3-methylpyridine;and the derivatization reagent B is a mixed solution of dichloromethane, chloroformyl propyl ester and isooctane. Furthermore, a stable isotope internal standard solution combination, a sample pretreatment method and a liquid chromatography-tandem mass spectrometry method based on the derivatization method are established. The derivatization reagent proposed by the invention has high derivatization efficiency and low toxicity; the method requires fewer samples, the processing is simple and quick, the repeatability is good, and the detection cost is low; absolute quantitative analysis on 48 amino acids is realized by only 22 minutes, the analysis time is greatly shortened, and the detection throughput is improved; and great promotion and application value are achieved.

This invention covers a process for dimerizing of isobutylene to Iso-octene and unique configuration is being disclosed, where the Feed is diluted to low level with recycle which has essentially no Iso-octene, dual catalyst system, new selectivator (IPA) and successive catalyst stages if needed to enhance the conversion. The process is very selective and provides higher isobutylene conversion.Additionally the invention also covers the hydrogenation of olefins to Paraffin, Iso-octene to Iso-octane product under moderate conditions and with dual or single catalyst system.

The invention discloses a method for extracting and purifying a lignin peroxidase by using reverse micelles. The method comprises the following steps of: preparing a reverse micelle solution containing a biosurfactant, isooctane and n-hexyl alcohol, wherein the biosurfactant is rhamnolipid; mixing a prepared crude solution of the lignin peroxidase with the reverse micelle solution, stirring, centrifuging, then, standing to carry out phase splitting, and distilling to obtain an upper organic phase; and mixing the upper organic phase with a buffer solution, stirring, centrifuging, then, standing to carry out phase splitting, distilling to obtain a lower water phase, i.e. a purified lignin peroxidase solution. The method disclosed by the invention has the advantages of environment-friendliness and safety, simplicity and convenience in operation, and low cost.

The invention discloses lead-free aviation piston type engine fuel and a preparation method thereof. The fuel is prepared from a fuel mixture and an additive, the fuel mixture is prepared from the following components in percentage by mass: 10 to 15 percent of isopentane, 18 to 25 percent of low-purity isooctane, 40 to 50 percent of high-purity isooctane, 10 to 15 percent of methylbenzene and 3 to8 percent of xylene, the additive comprises an antistatic agent, an antioxidant and a reinforcing agent, the reinforcing agent is prepared from succinimide, cyclopentane, xylene, ethylene glycol andturpentine, and is prepared by sequentially pumping the components in the formula ratio into a blending tank, uniformly mixing and filtering. According to the present invention, the motor octane number of the aviation fuel is increased, the ASTM D7592 standard is met, the aviation fuel does not contain lead, and the harm on the environment and the human body is low, meanwhile, the preparation method is simple, the overall performance of the aviation fuel oil is improved, the cost is low, and technical support is provided for marketization of domestic high-grade lead-free aviation fuel.

The invention belongs to the field of petrochemical industry, and particularly relates to a primary oil aid, and primary oil and a preparation method thereof, wherein the primary oil aid comprises anantioxidant, a corrosion inhibitor, a detergent dispersant and a cosolvent, has good corrosion resistance, can be adsorbed on the inner surface of an engine so as to prevent the corrosive components in an oil product from corroding the engine, protect the engine and prolong the service life of the engine, and has good oxidation resistance. According to the invention, by combining the primary oil aid, isopentane, isohexane, isooctane, alkylated gasoline, methyl tert-butyl ether, raffinate oil and toluene to obtain primary oil, the primary oil aid can react with the unstable free radicals in theprimary oil to terminate the chain reaction in the fuel oxidation process and eliminate the free radicals, so that the primary oil is in a stable state, the storage time of the engine and the oil product is prolonged, and the good cold starting performance, the combustion performance and the power performance are achieved; and after the primary oil is combusted, the combustion efficiency of the engine is high, the oil consumption is low, and the tail gas emission is little.

The invention relates to a method for preparing isooctane by isobutene superposition-hydrogenation. The method comprises the following steps: making hydrogen and a raw material containing isobutene contact a superposition-hydrogenation bifunctional solid acid catalyst in a reactor to carry out a superposition-hydrogenation reaction, wherein the superposition-hydrogenation bifunctional solid acid catalyst comprises an inert or acidic carrier, a hydrogenation active component and an acidic component. The method provided by the invention can effectively simplify the existing process for preparingisooctane from isobutene, has the advantages of simple process, long service life of the catalyst, high isobutene conversion rate and high isooctane selectivity, and can significantly reduce the production cost of the process for preparing isooctane from isobutene.

The invention belongs to the field of porous polymer materials, and particularly relates to a rice bran protein porous material with strong adsorption performance. The porous material is prepared by the following steps: adding rice bran protein into a solution to form a rice bran protein solution, performing modification treatment, conducting stirring, foaming, freezing, plasticizing, and freeze-drying to obtain the rice bran protein intercommunication porous material with high adsorption of organic solvents and grease, light weight, high porosity, degradability, greenness and environment-friendliness. The organic solvents comprise one or more of acetonitrile, methanol, ethyl acetate, isooctane, petroleum ether, cyclohexane and glycerol; The grease comprises one or more of rice bran oil, soybean oil, sunflower oil or medium-chain triglyceride. The preparation method provided by the invention is simple in process, easy to operate and suitable for large-scale production in factories, theraw materials are from natural products, and thus the prepared porous material is safe and non-toxic, has good biocompatibility, and can be widely applied to the fields of food, organic solvent wasteliquid transportation, biomedical materials and the like.

The invention discloses a kit and method for measuring the content of free fatty acid. Reagents of the kit comprise the first reagent composed of isooctane, the second reagent formed by dissolving sodium acetate in distilled water, then adding pyridine and mixing the constituents uniformly and the third reagent formed by dissolving copper acetate in distilled water, then adding pyridine and mixing the constituents uniformly. The method comprises the steps that free fatty acid in a sample is extracted through the isooctane, then the free fatty acid reacts with copper salt to generate copper soap under the weak acidic condition, and the content of free fatty acid in the reaction sample at the light absorption value of 715 nm is measured. According to the method, based on measurement conducted through an existing colorimetric method, the extraction method and operation steps are improved, and the effects of simple extraction and fast, simple and convenient measurement are achieved. According to the method, the sample pre-treatment process is simple and convenient, and an extracting solution is singular in constituent and low in cost. According to the measurement steps of the method, only the three reagents are needed for completing measurement, and the process is simple, convenient and fast.

The present invention discloses a durable super-hydrophobic manganese dioxide coating and a preparation method thereof, belonging to the field of metallic material surface treatment. In the method, by using manganese sulfate as a raw material, based on the property of interface reaction, a manganese dioxide coating is synthesized on the metallic material surface by simple and convenient solution impregnation, and then processed by hydrophobization with stearic acid to obtain a super-hydrophobic manganese dioxide coating. This coating has excellent chemical stability to organic solvents such as n-hexane, isooctane, dodecane, tetradecane, and acids, alkali and salt solutions at different pH values, and exhibits great resistance against dynamic water shear and good durability, with broad application prospect.

The invention discloses a light hydrocarbon fuel composition for a vehicle. The light hydrocarbon fuel composition comprises the following components in parts by weight: 500-600 parts of stable light hydrocarbon (octane site in a research method is greater than 92 #), 80-120 parts of isobutanol, 180-340 parts of aromatic hydrocarbon, 130-150 parts of xylene, 200-305 parts of isooctane, 0.25-0.5 part of lanthanum isooctanoate, 0.5-0.7 part of biphenyl, 0.1 part of a metal corrosion inhibitor and 0.1 part of an antioxidant. The stable light hydrocarbon is oil refinery downstream byproducts or methanol to olefin (MTO) and coal tar hydrogenation stable light hydrocarbons; the molecular formula of the isobutanol is C4H100; the aromatic hydrocarbon is a mixture of methylbenzene, dimethylbenzene and trimethylbenzene or one or two of methylbenzene, dimethylbenzene and trimethylbenzene for blending gasoline; the isooctane is alkylated oil and is also called isomer octane, and the research octane number is 98-100; and the metal corrosion inhibitor is benzotriazole. The light hydrocarbon fuel composition for the vehicle can improve power and reduce gasoline consumption; and emission of tail gas pollutants is reduced.

The invention belongs to the field of functional polymer materials, and particularly relates to a conjugated polymer of 4,8-diisooctane alkoxy phenyl [1,2-b;3,4-b] bithiophene and fluorinated quinoxaline, the structural formula of which is shown by I. The polymer is prepared by the Stille coupling reaction of double bromide fluorinated quinoxaline and a 2,6-bis(trimethyltin)-4,8-diisooctane alkoxy phenyl [1,2-b;3,4-b] bithiophene reagent and is used for electron donor materials of polymer bulk heterojunction photovoltaic cells. The polymer disclosed by the invention introduces strong electron-withdrawing fluorine atom to the electron-deficient unit quinoxaline, thus effectively reducing the HOMO energy level of materials and enhancing the open circuit voltage of polymer solar cells.

The present invention provides for a polyketide synthase (PKS) capable of synthesizing trimethylpentanoic acid. The present invention also provides for a host cell comprising the PKS and when cultured produces the trimethylpentanoic acid. The present invention also provides for a method of producing the trimethylpentanoic acid, comprising: providing a host cell of the present invention, and culturing said host cell in a suitable culture medium such that the trimethylpentanoic acid is produced, optionally isolating the trimethylpentanoic acid, and optionally, reducing the isolated trimethylpentanoic acid into a trimethylpentanol or an iso-octane.

The invention discloses a superposition oil hydrogenation device and method capable of producing isooctane, and belongs to the technical field of petrochemical engineering. The device comprises a catalytic distillation hydrogenation column, a condenser, a reflux tank, a reboiler, a first compressor and a hydrogenation reactor; the top of the catalytic distillation hydrogenation column is connectedwith the condenser, the condenser is connected with one inlet of the reflux tank, one outlet of the reflux tank is connected with the first compressor, and the other outlet of the reflux tank is connected with the catalytic distillation hydrogenation column; the reboiler is arranged at the bottom of the catalytic distillation column; and the bottom of the hydrogenation reactor is connected with the catalytic distillation hydrogenation column. According to the superposition oil hydrogenation device and method capable of producing the isooctane, olefin in superimposed oil can be saturated, requirements of the superposition oil as a vehicle gasoline blending component are met and the isooctane is produced as needed, a hydrogenation reaction is separately carried out on different components in the superimposed oil through the catalytic distillation column and the hydrogenation reactor, the equipment and operation costs can be reduced, and the purpose of energy saving and flexible operation is achieved.

The invention discloses vehicle primary oil and a production method thereof. The vehicle primary oil is prepared from the following raw materials in parts by weight: 25-85 parts of isooctane, 1-5 parts of benzene-making raffinate oil, 1-15 parts of methyl tert-butyl ether, 1-30 parts of isopentane and 1-3 parts of a primary oil additive. According to the primary oil disclosed by the invention, theprimary oil additive is added and can react with unstable free radicals in primary oil to terminate the oxidation process, so that the primary oil is in a more stable state, the storage time of the primary oil is prolonged, the primary oil is convenient to use, the production process of the primary oil is simple, raw materials only need to be added in sequence and uniformly mixed through a circulating pump, and the produced primary oil has excellent oxidation resistance and corrosion resistance.

The invention discloses micro-lead aviation piston type engine fuel and a preparation method thereof. The fuel is prepared from a fuel mixture and an additive, the fuel mixture is prepared from the following components in percentage by mass: 8 to 11 percent of isopentane, 60 to 70 percent of low-purity isooctane, 6 to 8 percent of high-purity isooctane, 10 to 15 percent of methylbenzene and 2 to 6percent of xylene, the additive comprises an antistatic agent, an antioxidant, a tetraethyl lead base solution and a reinforcing agent, and the preparation method comprises the following steps: sequentially pumping the components in the formula ratio into a blending tank, uniformly mixing, and filtering. The antiknock performance of the aviation fuel is improved, the requirement on 100VLL micro-lead aviation fuel in the ASTM D910 standard is met, the harm to the environment and human bodies is small, the stability of the aviation fuel is improved, the generation of colloid is reduced, the cost is low, and technical support is provided for marketization of domestic high-grade aviation fuel.

The invention provides a method for preparing naproxen, which uses a carrier, a catalyst and an organic solvent. The method is characterized in that: ionic liquid is used in place of the conventional catalyst and organic solvent; the hydrophobic carrier is used to cure lipase; isooctane and ethyl ether are used to extract a substrate remaining after reaction and the reaction product; the ethyl ether is removed by a vacuum method; an organic solvent is used for extraction; the recycling of the ionic liquid is realized; and at the same time, quick inactivation caused by the direct contact of the lipase with a polar organic solvent is avoided, the conversion rate is high and cost is saved.

The invention discloses a chromatographic method for determining the content of EPA, DHA and total w-3 acids in fish oil. The method comprises the following steps: 1, esterifying; 2, preparing a sample solution; 3, preparing a standard substance solution; 4, setting chromatographic conditions; 5, sequentially introducing samples; and 6, comparing the relation between the retention time and the peak area of a sample to be determined with that of a standard substance to determine the content in the sample. In the w-3 fatty acid-containing fish oil sample treatment process, unsaturated fatty acids is saponified, saponified unsaturated fatty acids and a methanol solution of boron trifluoride directly undergo an ester formation reaction, and unsaturated fatty acid esters are directly extracted by a BHT-containing isooctane solution to obtain a solution used as the sample to be determined. The method adopting the appropriate ester formation process and the sample post-treatment process has the advantages of short test operation cycle, effective avoiding of volatilization and other problems in the operation, and accurate and reliable determination result, and is especially suitable for industrial production and other occasions needing large scale determination.

The invention relates to a method for preparing isooctane through isobutene superposition-hydrogenation. The method comprises the step: making hydrogen and a raw material containing isobutene contacta superposition-hydrogenation bifunctional solid acid catalyst in a reactor to generate a superposition-hydrogenation reaction, wherein the superposition-hydrogenation bifunctional solid acid catalystadopted in the method is macroporous strongly acidic cation exchange resin loading a hydrogenation active component. The method provided by the invention can effectively simplify the existing processfor preparing isooctane from isobutene, has the advantages of simple process, long service life of the catalyst, high isobutene conversion rate and high isooctane selectivity, and can significantly reduce the production cost of the process for preparing isooctane from isobutene.

The invention discloses an application of a reverse micelle system in the catalysis of lignin peroxidase for an esterification reaction of an oleic acid. The reverse micelle system consists of rhamnoilpid, iso-octane and n-hexanol, wherein the ratio of the iso-octane to the n-hexanol is 1:(1-3); the clinical micelle of the reverse micelle system is 20 to 100 CMC. The application comprises the following steps of mixing crude enzyme of the lignin peroxidase and the reverse micelle system to form a reverse micelle enzyme system, adding the oleic acid and C1-C10 organic alcohol, and performing water bath shaking to obtain an esterification product, wherein the crude enzyme of the lignin peroxidase consists of lignin peroxidase and a buffer solution. The application of the reverse micelle system in the catalysis of the lignin peroxidase for the esterification reaction of the oleic acid is environment-friendly, safe, convenient to operate, low in cost and high in efficiency and yield.

The invention discloses a production method for generating isooctene by utilizing acetic acid and mixed C4 and producing high-purity isooctane by hydrogenating. The production method is characterizedby comprising the following steps: step 1, carrying out esterification; enabling acetic acid and isobutene in the mixed C4 to be subjected to esterification reaction, so as to generate tert-butyl acetate; step, carrying out polymerization; decomposing tert-butyl acetate into isobutene and synchronously carrying out dimerization reaction to generate isooctene; then carrying out steam stripping separation; carrying out distillation separation on a liquid-phase material to obtain isooctene; carrying out third-step recycling reaction on a gas phase; step 3, carrying out recycling and esterification on isobutene; step 4, hydrogenating and desulfurizing isooctene to obtain the high-purity isooctane and hydrogen sulfide. The method disclosed by the invention is green and environmentally friendly,high dimerization selectivity and high product purity; an intermediate product and acetic acid can be circularly utilized and requirements on large-scale and continuous production can be met; an MTBE(Methyl Tert-butyl Ether) device can be replaced after ethanol gasoline of China is implemented.

The invention relates to a polymeric microsphere and a preparation method thereof, belonging to the technical field of high polymer materials. The polymeric microsphere comprises the following raw materials in parts by weight: oil phases: 10-20 parts of ethylene glycol dimethacrylate, 15-25 parts of pentaerythritol triacrylate, 50-60 parts of hydroxyethyl methylacrylate, 20-30 parts of butyl acrylate, 5-9 parts of styrene, 60-70 parts of xylene, 40-50 parts of isooctane and 2-8 parts of azodiisobutyronitrile; water phases: 3-10 parts of polyvinyl alcohol, 15-25 parts of gelatin, 50-60 parts of NaCl and 1000-2000 parts of deionized water. According to the preparation method, the polymeric microsphere which has hydroxyl groups and can be equipped with certain functional groups through further functional reaction is prepared by virtue of a suspension polymerization method by taking ethylene glycol dimethacrylate and pentaerythritol triacrylate as a mixing cross-linking agent and hydroxyethyl methylacrylate, butyl acrylate and styrene as copolymer monomers.

The invention provides a D-A-D type organic photo-thermal small molecular material and a preparation method thereof. The D-A-D type organic photo-thermal small molecular material contains an electronwithdrawing group 2,1,3-benzothiadiazole and an electron donating group 3,6-di(thiophen-2-yl)-2,5-dihydropyrrolo[3,4-c] pyrrole-1,4-dione. The preparation method comprises the steps: substituting H ona thiophene ring of bromo-isooctane substituted 3,6-di(thiophen-2-yl)-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione with N-bromo-succinimide, and carrying out a reaction with 2,1,3-benzothiadiazole-4,7-bis(pinacol borate) through Suzuki reaction to obtain the target product. With the introduction of an alkyl chain on the side chain of the electron donating group, the solubility of the organic photo-thermal material in the organic solvent is improved, the problem of poor solubility of the organic polymer is overcome, and favorable light stability is achieved.

The invention discloses an isooctane production line. The isooctane production line comprises a coolant pump (10), a raw material buffer tank (11), a depropanization tower (12), a return tank (13), a dehydrater (20), a reactor (21), a flash tank (22), a pickling settling chamber (23), an alkali wash settling chamber (24), a deisobutanizer (25) and an n-butane removal tower (26), wherein the raw material buffer tank (11) comprises a tank shell (15) and a group of separators (16). The isooctane production line disclosed by the invention has the advantages that due to the group of separators in the buffer tank, the gas flow time in the buffer tank is increased, and the liquefaction efficiency is improved; the tank body is separated into an upper part and a lower part by a spherical separator, so that the contact area between mixed gases and condensing agents is enlarged by the spherical separator, and the cooling effect is improved; the flash effect is improved by changing the contact area and time between liquid in the flash tank and air; and the whole production line is reasonable in structure and high in efficiency.