148 results about "Isooctanes" patented technology

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 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 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 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 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 relates to a measurement method for the cyfluthrin pesticide residue in tea. The method comprises the following steps: firstly, sample preparation is carried out, namely, tea is dried, ground and sieved; secondly, cyfluthrin crude extraction is carried out, namely, the tea powder is placed in a centrifuge tube, water is added for infiltration, petroleum ether and a mixed internal standard operating fluid are added, the mixture is shocked and mixed uniformly, anhydrous magnesium sulfate, sodium chloride, sodium citrate, sodium hydrogencitrate and methylbenzene are added, and the mixture is shocked uniformly and centrifuged; thirdly, cyfluthrin crude extract product purifying is carried out, namely, the supernate is taken and placed in a centrifuge tube, anhydrous magnesium sulfate and N-propylethylenediamine bonding solid adsorbents are added, the mixture is shocked uniformly and centrifuged; fourthly, cyfluthrin extraction is carried out, namely, the supernate is taken, extraction, condensation and filtering are carried out in a Florisil column by utilization of the toluene-isooctane mixed solution; fifthly, chromatographic detection is carried out. The extraction method is simple, the effects are good, and result integration processing is simple and accurate. The average recovery rate of the method is 93.21%-103.75%, the relative standard deviation is 3.28%-6.20%, the average recovery rate and the relative standard deviation meet requirements and the method is accurate and reliable.