96 results about "Isooctanes" patented technology

The embodiment of the invention provides a preparation method of bis-ethylhexyloxyphenol methoxyphenyl triazine, and the preparation method comprises the following steps: taking 2, 4-dichloro-6-(4-methoxyphenyl) triazine and resorcinol mono-isooctane ether as raw materials, taking a synergistic activated resin as a catalyst, and reacting at the temperature of 80-90 DEG C to obtain the bis-ethylhexyloxyphenol methoxyphenyl triazine. The preparation method comprises the following steps: synthesizing bis-ethyl hexyloxyphenol methoxyphenyl triazine through a direct alkylation method; wherein the synergistic activated resin is acidic resin loaded with metal ions. According to the preparation method provided by the embodiment of the invention, at least the catalyst can be recycled and reused, a large amount of aluminum trichloride wastewater existing in a traditional synthesis method is avoided, and the preparation method is easily applied to actual industrial production.

The present application provides a method for preparing a perfluoropolyether oil-based cobalt-boron magnetic fluid, which is applied to the technical field of magnetic fluids. The present application synthesizes cobalt boride Co-B magnetic powder by reacting aqueous bis(2-ethylhexyl) succinate sulfonate, sodium bis(2-ethylhexyl) succinate sulfonate and sodium borohydride in an isooctane solution, and then coats the surface of the cobalt boride powder with silica by hydrolysis of ethyl orthosilicate. Perfluoropolyether acyl fluoride is grafted onto the surface of the silica-coated cobalt boride magnetic powder by an amide reaction to improve the compatibility between the cobalt boride magnetic powder and perfluoropolyether oil, thereby preparing a thermodynamically stable perfluoropolyether oil-based Co-B magnetic fluid.

The invention discloses a preparation method and an application of a flower-like Mg-Al LDH (layered double hydroxide) modified polydimethylsiloxane / polyethersulfone composite membrane. The preparation method comprises the following steps: dissolving polyethersulfone in N, N-dimethylacetamide, scraping a membrane, and soaking the membrane in deionized water; the preparation method comprises the following steps: dissolving PDMS in an isooctane solvent, adding LDH with different concentrations, continuously stirring until LDH is completely dispersed, adding PDMS, a cross-linking agent and a catalyst into the cross-linking agent and the catalyst according to a mass ratio of 10: 2: 1, and preparing the coating by adopting a wet film dip-coating method. And coating to obtain the modified composite membrane. The method is mainly applied to preparation of gas-liquid two-phase gas separation so as to obtain a composite membrane material with high CO2 / O2 selectivity and high gas permeability. Meanwhile, the method is simple in preparation process, the raw materials are cheap and easy to obtain, the LDH modified composite membrane can effectively improve the gas permeability and selectivity of the material, and a new preparation thought is provided for preparing a good CO2 gas separation membrane.

The invention relates to the technical field of chemical engineering, in particular to an energy-saving production method of isooctane, which comprises the following steps: mixing etherified C4 and supplemented isobutane, and removing free water; mixing the mixed C4 with hydrogen and carrying out hydrogenation reaction; carrying out light hydrocarbon removal treatment on the hydrogenation reaction product to obtain a C4 fraction; carrying out heat exchange on the C4 fraction and then removing free water; mixing the C4 fraction with a circulating refrigerant and circulating isobutane, and reacting to generate alkylated oil; sequentially carrying out flash evaporation treatment and acid-hydrocarbon separation on a reaction product; carrying out flash evaporation on hydrocarbons after heat exchange; carrying out pressure boosting and heat exchange on the bottom liquid phase of the flash tank, and then conveying to an alkylated oil separation tower; carrying out heat exchange on hydrocarbons of isobutane and n-butane removed from the top, and then conveying the hydrocarbons to a deisobutanizer; and cooling the hydrocarbons from which the n-butane is removed to obtain isooctane, and recycling the isooctane. Circulating water cooling and fractionating tower bottom steam consumption are replaced by heat exchange treatment between materials, energy is saved, and the utilization rate of raw materials is increased.

The application provides a kind of eutectic solvent and its preparation method and application, the eutectic solvent includes hydrogen bond donor compound and hydrogen bond acceptor compound, the structural formula of hydrogen bond donor compound is wherein, R1 and R2 independently selected from n-octyl or iso-octyl, the hydrogen bond acceptor compound includes tri-n-octyl phosphine oxide.The eutectic solvent can be efficiently extracted from the permanent magnet rare earth waste hydrochloric acid solution of transition metal, can reduce the use of a large amount of organic solvent in the traditional extraction process.

The application discloses an alkylation device with a circulating refrigerant impurity removal function, which comprises an alkali washing assembly, a water washing assembly, a depropanizing tower and a deisobutane tower; the alkali washing assembly and the water washing assembly are connected in series on a circulating refrigerant feeding conveying pipe; a water washing assembly discharge port is in pipeline communication with a depropanizing tower feeding inlet; and a depropanizing tower lower discharge port is in pipeline communication with a deisobutane tower feeding inlet. The device can remove SO2, sulfides such as mercaptans and free water in the circulating refrigerant of the alkylation device, thereby effectively reducing the plugging frequency of the depropanizing tower, improving the propane removal efficiency of the alkylation device system, avoiding the increase of the content of propane in the system, maintaining a better alkylene ratio in the circulating material and improving the quality of the obtained isooctane product.

The invention provides a preparation method of ultralow-density hydrophobic silicon dioxide aerogel powder. The preparation method comprises the following steps: S1, crushing silicon dioxide gel until the particle size D50 is not greater than 50 microns and the particle size D90 is not greater than 100 microns, and adding a solvent for replacement; and S2, mixing the gel replaced in the step S1 with hexamethyldisilazane and isooctane, heating in a water bath at 50-70 DEG C, modifying for 20-24 hours, drying under normal pressure after modification is finished, and crushing until the particle size D50 is not greater than 20 microns and the particle size D90 is not greater than 30 microns. According to the preparation method provided by the invention, the density of the obtained hydrophobic silicon dioxide aerogel powder is successfully controlled within an extremely low range, and the preparation method is stable in process, low in cost, high in efficiency, good in stability, free of agglomerated particles, good in fluidity and suitable for industrial large-scale production.

The flash evaporation kettle comprises a kettle body, a plurality of evenly-distributed supporting rods are connected to the position, close to the bottom, of the outer wall of the kettle body, a round block is connected to the position, close to the top, in the kettle body in a sliding mode, the bottom of the round block is movably connected with an upper pipe body, the top of the upper pipe body is arranged in a closed mode, and the bottom of the upper pipe body is connected with a flash evaporation device. The bottom of the upper pipe body is connected with a lower pipe body through a bolt, the bottom of the lower pipe body is closed, a feeding pipe is connected to the position, close to the top, of the left side of the kettle body in a penetrating mode, a feeding port is formed in the left side of the upper pipe body, and the bottom of the kettle body is communicated with a discharging pipe. According to the technical scheme, through mutual cooperation of the round block, the electric push rod, the rotating motor, the upper pipe body, the lower pipe body and other components, intermittent feeding can be conducted, effective and uniform flash evaporation can be conducted, the flash evaporation efficiency is improved, effective retention and swinging can be conducted, the full contact reaction can be conducted, and the service life of the device is prolonged. The contact reaction efficiency is improved.

The present invention provides a method for hydrogenating isooctene to isooctane, comprising: contacting isooctene with a molybdenum-nickel-based hydrogenation catalyst, thereby causing a hydrogenation reaction to generate isooctane, wherein the molybdenum-nickel-based hydrogenation catalyst comprises an Al2O3-TiO2 composite oxide and a modifying component and an active component supported on the Al2O3-TiO2 composite oxide, the modifying component comprising cobalt and / or cobalt oxide and cerium and / or cerium oxide, and the active component comprising molybdenum and / or molybdenum oxide and nickel and / or nickel oxide. The present invention uses a non-precious metal catalyst with excellent low-temperature activity and a composite oxide as a carrier, achieves a good hydrogenation effect under low temperature, low pressure and low hydrogen-to-oil ratio, helps to reduce reaction unit energy consumption and operating costs, and the method can effectively avoid sulfur poisoning and chlorine poisoning of the non-precious metal catalyst, and has industrial practical significance.

The invention relates to the field of chemical engineering, in particular to a catalytic distillation method for removing impurities in isooctane reaction raw materials, which comprises the following steps: S1, separating a C4 raw material and butadiene: treating the C4 raw material with desalted water to obtain a washed C4 raw material; carrying out coalescence dehydration treatment on the washed C4 raw material to obtain a dehydrated C4 raw material; the dehydrated C4 raw material is subjected to catalytic rectification treatment, a rectified C4 raw material is obtained, a catalyst for catalytic rectification treatment is a La-Ce / ZSM-5 catalyst, and the rectified C4 raw material is subjected to membrane separation, so that the C4 raw material and butadiene are obtained; and S2, pumping the C4 raw material into an alkylation reactor, and carrying out an alkylation reaction on the C4 raw material and isobutane under the action of a solid superacid catalyst to prepare isooctane. Compared with the prior art, the method has the advantages that impurities in the C4 raw material are removed, the byproduct butadiene and the C4 raw material are extracted, the service life of a catalyst in the isooctane preparation process can be prolonged by using the C4 raw material, the solid superacid catalyst is improved at the same time, and the C4 conversion rate and the isooctane yield are improved.

The invention relates to the technical field of pharmaceutical analysis, in particular to a method for detecting vitamin D3 related substances in vitamin D drops, which comprises the following steps: (1) taking the vitamin D drops in a brown measuring flask, adding methanol for extraction, freezing to solidify oil drops, pouring methanol liquid, performing rotary evaporation under reduced pressure until the methanol liquid is dry, adding isooctane for dissolving to obtain a mass localization solution; (2) measuring and injecting into a purification chromatograph, accurately collecting the effluent in the time period according to the appearance time of the previtamin D3 and the impurity E in the impurity positioning solution, blow-drying with nitrogen, and adding isooctane for dissolving to obtain a test solution; (3) precisely measuring 100 [mu] l of the test solution, placing the test solution in a 10ml brown measuring flask, diluting with isooctane to a constant volume to a scale, and uniformly shaking to obtain a control solution; and (4) precisely measuring 100 [mu] l of the contrast solution and 100 [mu] l of the test solution, respectively injecting into an analysis liquid chromatograph, and recording chromatograms. According to the method, the interference of oily matrixes is removed, and various impurities in the vitamin D drops can be effectively, economically and quickly measured.

This invention relates to a method for determining the migration amounts of 4,4'-biphenyl and 1,1'-sulfonyl di(4-chlorobenzene), belonging to the technical field of migration amount determination. The method includes the following steps: S1: conducting a migration experiment; S2: treating the soaking solution; S3: preparing a chemical substitute solution; taking 2 mL of the chemical substitute reagent (95% ethanol or isooctane) soaking solution obtained after the migration experiment into a 10 mL stoppered graduated glass tube, accurately adding 50 μL of dimethyl sulfoxide, mixing, blowing with nitrogen to near dryness under a 45°C water bath, making up to 2 mL with acetonitrile-water solution (1+1), mixing, filtering through a microporous membrane, and preparing for determination; S4: preparing a blank solution; S5: sample determination; S6: blank determination; S7: verifying the recovery rate and precision of the method using the above blank sample, selecting the detection limit and quantitation limit for two-level experiments at two concentrations.

The invention discloses a synthesis method of bis-ethyl hexyloxyphenol methoxyphenyl triazine, which relates to the technical field of organic chemistry, and comprises the following steps: preparing an intermediate I, putting zinc chloride into reaction, adding xylene for dispersion, dropwise adding the intermediate I, resorcinol and xylene solvent to obtain a yellow intermediate II crude product, and then adding the yellow intermediate II crude product into the reaction kettle to obtain the bis-ethyl hexyloxyphenol methoxyphenyl triazine. Adding the intermediate II, a xylene solvent, an acid-binding agent, chloro-isooctane and bromo-isooctane into a reaction kettle, carrying out reaction treatment to obtain a high-purity product, and carrying out sampling detection on the step 1, the step 2 and the step 3. According to the synthesis method of the bis-ethyl hexyloxyphenol methoxyphenyl triazine, p-bromoanisole and chloro-isooctane or bromo-isooctane are adopted as raw materials, the production cost is reduced, xylene is a single solvent, the problem that a mixed solvent is difficult to recycle is solved, anhydrous aluminum chloride or anhydrous zinc chloride is adopted as a catalyst, and a recrystallization technology is adopted, so that the yield of the bis-ethyl hexyloxyphenol methoxyphenyl triazine is increased. The purity of the product is improved, and the bis-ethyl hexyloxyphenol methoxyphenyl triazine with higher purity is prepared.

The utility model relates to the technical field of isooctane production, and provides a sewage aeration treatment device for isooctane production, which comprises a sewage tank and a filter screen plate, one side of the outer surface of the top of the sewage tank is rotatably connected with a sealing cover, and four corners of the bottom of the filter screen plate are fixedly provided with support blocks. The filter screen plate is movably embedded in the sewage tank, and the two connecting plates are fixedly mounted on the two sides of the top of the filter screen plate; the sealing cover is closed, sewage is input into the sewage tank through the water inlet pipe, the sealed sewage tank can prevent isooctane from directly volatilizing and polluting air during aeration treatment, the air blower is started to convey the air into the connecting pipe through the air conveying pipe, and the connecting pipe is fixedly embedded in the lower end of the interior of the sewage tank. A plurality of aeration discs are arranged on the outer surface of the connecting pipe, air is converted into fine bubbles by the aeration discs, and isooctane in the sewage is volatilized in the aeration process to form gaseous pollutants.

The present invention discloses a method for preparing a copper sheet corrosion inhibitor for gasoline and diesel components produced as byproducts from the hydrogenation of waste lubricating oils, belonging to the technical field of petroleum product corrosion inhibition. The method comprises preparing a saturated isooctane / n-hexadecane solution of tetrazole; preparing an n-octane / n-hexadecane solution of 8-hydroxyquinoline or imidazole; mixing dropwise, adjusting the pH, and heating in a water bath; adding organic cerium, cooling, and aging the solution. The copper sheet corrosion inhibitor for gasoline and diesel components produced as byproducts from the hydrogenation of waste lubricating oils prepared using this method can significantly reduce the corrosion level of the copper sheet produced as a byproduct from the hydrogenation of waste lubricating oils, even at a very low dosage, thereby achieving the technical purpose of inhibiting copper sheet corrosion.

Alcohol based unleaded automotive racing fuels, using blends of four basic chemical components, including ethanol, methanol, toluene, and isopentane and / or cyclopentane. Mixtures provide increased power, and better charge cooling than conventional racing gasolines, whether leaded or unleaded. The claimed racing fuel blends do not include gasoline, isooctane, or alkylate fractions common to alcohol-gasoline mixtures such as E85 alcohol based fuels. The novel fuel blends claimed can be manufactured from commonly available pure chemical components, and make possible distributed manufacture of automotive racing fuels.

The application belongs to the technical field of fine chemical product preparation, and particularly relates to a preparation method of diisooctyl phosphite intermediate and application of the intermediate in preparation of P507. The preparation method of the diisooctyl phosphite intermediate comprises the following steps: adding phosphorus trichloride into isooctanol by liquid dropping, controlling dropping speed, dropping pressure and reaction temperature, obtaining a diisooctyl phosphite mixture, removing impurities from the diisooctyl phosphite mixture by gas-phase ammonia neutralization or high-vacuum HCl removal, distilling chloroisoctane, collecting chloroisoctane byproduct, and finally obtaining diisooctyl phosphite. The preparation method of the diisooctyl phosphite intermediate is simple in operation, mild in condition, good in environmental protection, high in purity and yield of the prepared intermediate, and the application of the diisooctyl phosphite intermediate in preparation of P507 is high in purity of the prepared P507.

The invention provides a preparation method of polyurethane foam, which comprises the following steps: S10, preparing modified epoxy resin: polymerizing N-isopropylacrylamide and a cross-linking agent to form a temperature-sensitive network, and compounding the temperature-sensitive network with epoxy resin, polyvinyl alcohol and nano-zinc oxide; s20, preparing modified isooctane: forming a shell by using an acrylonitrile and methyl methacrylate copolymer through suspension polymerization, and wrapping the core substance dimethyl carbonate to obtain a core-shell structure microcapsule; and S30: mixing the two modifiers with additives such as polyol and a catalyst to form a component A, then impacting and mixing the component A with a polyisocyanate component B under high pressure, and injecting the mixture into a preheating mold for foaming and curing to finally obtain the polyurethane foam. The polyurethane foam prepared by the method is good in toughness, and is not easy to deform or break when being subjected to external tension or shear stress.

The present invention discloses a method for recovering normal butane in isooctane oil as a raw material for producing maleic anhydride, comprising: the product after alkylation reaction enters a debutanizer for separation, the upper section of the debutanizer extracts mixed butane and enters a butane separation tower for separation by increasing the operating temperature of the debutanizer bottom, and the lower section of the butane separation tower extracts normal butane and sends it to a maleic anhydride reaction device; a part of the isobutane extracted from the top of the butane separation tower is returned to the alkylation reactor, and the other part is mixed with the isooctane product extracted from the bottom of the debutanizer; the isopentane extracted from the bottom of the butane separation tower is mixed with the isooctane product extracted from the bottom of the debutanizer. The present invention significantly reduces the production cost of the maleic anhydride process by recovering normal butane in the isooctane product of the alkylation process as a raw material for the maleic anhydride process; and by blending the surplus isobutane C4 and isopentane C5 in the maleic anhydride process raw materials into the isooctane product, the quality and yield of the isooctane product after the normal butane is extracted are guaranteed.

The invention belongs to the technical field of detection, and particularly relates to a method for detecting the content of tributyl phosphate. The method for detecting the content of tributyl phosphate comprises the following steps: extracting a liquid to be detected by using water, and layering to obtain an upper oil phase; and mixing the upper oil phase with isooctane, performing gas chromatography detection, and obtaining the content of tributyl phosphate according to the obtained peak area and a preset standard curve. According to the method, water is adopted as an extraction solvent, interfering substances such as phosphoric acid can be removed, TBP can be concentrated, and corrosion to a chromatographic column can be reduced due to acidity reduction. An upper-layer oil phase obtained after water extraction and isooctane are mixed and diluted, so that the viscosity of a sample can be reduced, and the separation effect on a chromatographic column can be improved; meanwhile, the blockage of a chromatographic column can be reduced, and the resolution ratio of a chromatographic peak is improved, so that the content of tributyl phosphate can be more accurately measured.

The application relates to an iminodiacetic acid type chelating resin and a preparation method and application thereof, and the preparation method comprises the following steps: (1) in the case that the stirring speed is 200-350 r / min, two dispersants are dissolved in water, then ethylbenzene, glycidyl methacrylate, trimethylolpropane trimethacrylate, isooctane and di-t-butyl peroxide are added, the raw materials are reacted after ultrasonic mixing, centrifugal separation is carried out after the reaction is completed, the filter cake is cleaned and dried, and resin microspheres are obtained; (2) in the stirring state, the resin microspheres obtained in the step (1) are added into water, then iminodiacetic acid is added, stirring is continued, then preliminary reaction is carried out by heating, NaOH is further added, reaction is carried out by heating, after the reaction is completed, filtration, cleaning and drying are carried out, and the iminodiacetic acid type chelating resin is obtained. The chelating resin particle size can be controlled, the particle size is relatively large, the specific surface area is large, the adsorption capacity is high, and the chelating resin can be used for adsorbing lead ions in heavy salt matrix.

In some embodiments, a composition includes isooctane in an amount of about 81 vol % to about 87 vol %. The composition further includes a dialkyl ether compound in an amount of about 10 vol % to about 18 vol %, wherein the dialkyl ether compound is selected from the group consisting of ethyl-tert-butyl-ether, methyl-tert-butyl-ether, and combinations thereof. The composition further includes methanol in an amount of about 1.5 vol % or less. The total oxygen content present in the composition comprises about 3.2 wt % or less of the composition. The figures illustrate comparative testing including compositions of the disclosure.

The invention relates to a multi-effect synergistic pharmaceutical composition for bone repair and a preparation method thereof, and belongs to the technical field of biological medicine, the pharmaceutical composition comprises five-black chicken yolk peptide, tegillarca granosa peptide, epimedium extract and rhizoma drynariae extract. The five-black chicken egg yolk peptide is obtained by carrying out enzymolysis on five-black chicken egg yolk freeze-dried powder by lipase and trypsin, then carrying out enzymolysis by ficin and bromelain, and then sequentially purifying by a macroporous adsorption resin column and a phenyl agarose gel column. The tegillarca granosa peptide is obtained by fermenting tegillarca granosa meat through bacillus marinus; the herba epimedii extract is obtained by purifying an upper phase extracted from herba epimedii powder through an aqueous two-phase system through a sephadex chromatographic column; the rhizoma drynariae extract is obtained by performing enzymolysis on rhizoma drynariae powder with cellulase, extracting with a sodium dioctyl sulfosuccinate-isooctane reverse micelle solution, taking an upper organic phase, breaking micelles, taking a lower water phase and performing ultrafiltration. The four components are matched according to a specific proportion to realize multi-effect regulation of promoting formation, inhibiting bone resorption and regulating hormone.

The invention discloses an isooctane separation method and device, and the method comprises the steps: enabling a reaction product of isooctane to enter an isobutane tower for rectification separation, enabling tower bottoms of the isobutane tower to enter the tower top of a coarse separation tower, enabling tower top gas of the coarse separation tower to enter the tower bottom of the isobutane tower, enabling the tower top gas of the isobutane tower to be pressurized and heated, and then introducing the tower top gas into an isobutane tower reboiler, performing heat exchange with liquid extracted from a tower kettle of the isobutane tower, condensing tower top gas subjected to heat exchange into a liquid phase by gas condensation, cooling and depressurizing, introducing the liquid phase into a reflux tank of the isobutane tower, refluxing one part of the liquid phase obtained from the reflux tank of the isobutane tower to the tower top, and extracting the other part of the liquid phase as an isobutane product; a product at the bottom of the crude separation tower enters an isooctane tower for rectification separation, tower top gas of the isooctane tower is condensed and then enters an isooctane tower return tank, a part of condensate obtained from the isooctane tower return tank flows back to the tower top, the other part of condensate is extracted as an n-butane product, and isooctane is extracted from a tower kettle of the isooctane tower. According to the method, the production energy consumption of isooctane separation can be greatly reduced.

This invention relates to a method for the continuous production of isopropanol-isooctane azeotropic mixtures by extractive distillation, characterized in that the apparatus for implementing this method mainly comprises the following parts: distillation column 1 (T1), distillation column 2 (T2), condenser 1 (CL1), condenser 2 (CL2), top storage tank 1 (C1), top storage tank 2 (C2), reboiler 1 (H1), reboiler 2 (H2), cooler (COL), and centrifugal pump 1 (P1); wherein distillation column 1 (T1)... 1) The bottom stream enters distillation column 2 (T2), and high-purity isopropanol is collected from the top stream of distillation column 1 (T1). The bottom product of distillation column 1 (T1) enters distillation column 2 (T2), and high-purity isooctane is collected from the top stream of distillation column 2 (T2), completing the separation of components. High-purity extractant is obtained at the bottom of distillation column 2 (T2), and after passing through a cooler (COL), it enters a centrifugal pump (P1). After cooling, extractant is added and then refluxed to distillation column 1 (T1). The extractant used is essentially non-volatile, which reduces extractant loss and allows for reuse, thereby reducing separation costs.

The invention provides a reverse micelle DNA preservation and release method, and belongs to the technical field of DNA preservation. The reverse micelle DNA preservation method provided by the invention comprises the following steps: mixing isooctane and 1-hexanol to obtain an organic solvent, and mixing hexadecyl trimethyl ammonium bromide and the organic solvent to obtain an organic phase; dissolving DNA in water to obtain a water phase; and mixing the organic phase with the water phase to obtain a reverse micelle system for storage. According to the reverse micelle DNA preservation method provided by the invention, the preservation time of the DNA under the room temperature condition can be obviously prolonged, and specifically, the preservation time can reach more than half a year. And the reverse micelle is adopted to preserve the DNA at room temperature, so that the method has the advantages of simplicity and convenience in operation and low cost of required materials.

The invention belongs to the technical field of photovoltaic materials, and particularly relates to an organic-inorganic composite polymer ultraviolet cut-off agent, a preparation method and a packaging adhesive film, and the preparation method comprises the following steps: heating cyanuric chloride, resorcinol, a Lewis acid catalyst and a solvent 1, 2-dichloroethane for reaction to obtain a solid compound I; dropwise adding acryloyl chloride into the compound I, triethylamine and tetrahydrofuran at low temperature, and precipitating to obtain a solid compound II; the compound II, methyl chloroformate, sodium bicarbonate and methylbenzene are subjected to a heating reflux reaction, and a compound III is obtained; heating the compound III, N, N-dimethylformamide and potassium carbonate, and dropwise adding bromo-isooctane to obtain a compound IV; the compound IV, polyethylene glycol 400, methanesulfonic acid and a toluene solution are subjected to a heating reflux reaction, and a compound V is obtained; the compound V, MTMP, KH-571, a toluene solution and an initiator are subjected to a heating reaction, and a compound VI is obtained; dissolving the compound VI and titanic acid in dichloromethane, adding HCl, dopamine hydrochloride and H2O2, and mixing to obtain a compound VII;

In some embodiments, a composition includes isooctane in an amount of about 81 vol% to about 87 vol%. The composition further includes a dialky 1 ether compound in an amount of about 10 vol% to about 18 vol%, wherein the dialkyl ether compound is selected from the group consisting of ethyl-tert-butyl-ether. methyl-tert-butyl-ether. and combinations thereof. The composition further includes methanol in an amount of about 1.5 vol% or less. The total oxygen content present in the composition comprises about 3.2 wt% or less of the composition. The figures illustrate comparative testing including compositions of the disclosure.

The invention discloses an environment-friendly purification device for isooctane production and a process thereof, the environment-friendly purification device for isooctane production comprises a purification tank, a low-temperature bin, a first liquid inlet, a second liquid inlet, a second liquid inlet, a third liquid inlet, a fourth liquid inlet, a fifth liquid inlet and a sixth liquid outlet, and the low-temperature bin is arranged at the upper end of the purification tank and the bottom surface of the low-temperature bin is conical; the partition plate is fixedly arranged in the purification tank and divides the internal space of the purification tank into a condensation area on the upper side and a collection area on the lower side; and the drainage tube is arranged between the low-temperature bin and the partition plate. By arranging the low-temperature bin with the conical bottom face, the low-temperature bin makes contact with gaseous floating isooctane guided in through the air inlet to form condensate, then the condensate automatically flows towards the lowest position of the center of the low-temperature bin along the conical surface, slides downwards through the surface of the drainage pipe till reaching a first leakage net, passes through the collecting hopper and is intensively discharged from a second liquid outlet; and condensate formed on other surfaces in the purification tank can be discharged from the first liquid outlet, so that the isooctane is produced in batches, and the purity of the isooctane is effectively improved.

The invention relates to the technical field of composite films, in particular to a preparation process of a ZIF-8 / Hb mixed LB film, which comprises the following steps: adding a hemoglobin solution into an aqueous solution of zinc nitrate hexahydrate, and stirring for reaction to obtain a first reaction solution; adding an aqueous solution of 2-methylimidazole into the first reaction solution, carrying out a stirring reaction, carrying out centrifugal washing, and drying to obtain ZIF-8 / Hb nanoparticles; adding the ZIF-8 / Hb nanoparticles into an isooctane solution of sodium dioctyl sulfosuccinate, and carrying out ultrasonic dispersion to obtain a second reaction solution; drawing a pi-A curve of ZIF-8 / Hb, and preparing a ZIF-8 / Hb film through a multifunctional LB film drawing machine and setting film drawing parameters; according to the invention, a reverse micelle synergistic stable interface is realized, a nano-particle film forming bottleneck is broken through, the biological activity is accurately reserved, an electrochemical sensing interface and technological parameters are intelligently regulated and controlled, and the effect of customizable film performance is realized.