429 results about "Methyl tertiary butyl ether" patented technology

The present invention provides a method of making a fluoropolymer comprising repeating units derived from one or more gaseous fluorinated monomers. The method comprises an aqueous emulsion polymerization of gaseous fluorinated monomers in the presence of an ether selected from the group consisting of dimethyl ether (DME), methyl tertiary butyl ether (MTBE) and mixtures thereof.

The invention discloses methanol gasoline which is characterized by being prepared from the following raw materials in percent by weight: 40-52 percent of methanol, 50-60 percent of gasoline and 4-15 percent of additive, wherein the additive is prepared from the following raw materials in percent by weight: 3.5-10 percent of methyl tertiary butyl ether, 0.5-2 percent of dimethylbenzene and 0.1-0.5 percent of ethylene glycol monobutyl ether. The methanol gasoline is equivalent to traditional NO. 90, 93 or 97 gasoline in the aspect of combustion dynamic performance and has the advantages of low production cost and less environment pollution.

The invention relates to a heat pump rectification device and method for removing sulfide in MTBE (Methyl Tertiary Butyl Ether). The device mainly comprises a feed preheater, a rectification tower, a compressor, an auxiliary reboiler, a main reboiler, an auxiliary cooler, a product cooler, a buffer tank and a reflux pump. The gas the distillation tower top is compressed by the compressor into superheated steam, which is used as a heat source and introduced through the reboiler for heat exchange at the tower bottom; and condensed liquid after heat exchange enters the buffer tank, passes through a reflux pump and is preheated with the raw materials by the feed preheater; and part of the cooled liquid is pumped back to the rectification tower for reflux, and the other part of the cooled liquid is recovered as a top product. By using the heat pump distillation, the transfer of the heat taken by the tower top condenser to the reboiler at the tower bottom is realized, which greatly reduces the energy consumption. Sulfur content of MTBE at the distillation tower top is 5-9ppm, and the recovery rate of MTBE is 99.6-99.8%. The device is simple for operation, safe, reliable, efficient and energy-saving.

The composition of solid acid catalyst for preparing isobutylene by cracking reaction of methyl tert-butyl ether contains (wt%) 20-95% of aluminium oxide, 0.1-20% of titanium dioxide, 0-5% of other oxide and 0.5-50% of loaded SO4, and its preparation method includes the following steps: adding aluminium oxide into the aqueous solution containing Ti(SO4)2 and other soluble metal salt, filtering, soaking filter cake in ammonia water, filtering, washing, drying, soaking in sulfuric acid solution, filtering, drying and baking so as to obtain the invented SO4/M-TiO2/Al2O3 type low-temp. catalyst.

The invention provides an environmental-friendly methanol gasoline multifunctional synergist which comprises the following components in parts by weight: 35-45 parts of methyl tertiary butyl ether, 20-30 parts of methyl formate, 20-30 parts of dimethylbenzene, 10-20 parts of alkyl isopropanol, 3-20 parts of tertiary butanol, 0.1-0.5 part of dicyclopentadienyl iron, 0.05-0.1 part of hydroxy benzotriazole, 0.5-1 part of dodecyl 2-ethylhexanoate and 0.1 part of triethanolamine. The synergist has low cost, easy obtaining of raw materials and remarkable synergizing effect; the mixed methanol gasoline has power equal to No.93 gasoline and the addition amount of commonly 3-5 in the methanol gasoline, and ensures that the emission of Co in the tail gas is greatly reduced; and the methanol gasoline after the addition has good stability and comprehensive cost reduced by over 30 percent, and is mainly used as a methanol gasoline additive.

The invention discloses a method for simultaneously detecting 21 hydroxyl polybrominated diphenyl ethers (OH-PBDEs) in soil. The method includes the following steps that 1, a soil sample to be detected is extracted with organic solvent, and the organic solvent is selected from normal hexane, acetonitrile, methyl alcohol, dichloromethane, methyl tertiary butyl ether and NaOH-ethyl alcohol; 2, an extracting solution obtained in the step 1 is concentrated and purified; 3, a product in the step 2 is detected through an ultra-high performance liquid chromatography-triple quadrupole tandem mass spectrometer and compared with a hydroxyl polybrominated diphenyl ether standard substance in parallel operation to obtain quantitative results. The method has the advantages of being high in detection speed, accurate in result, high in recovery rate, low in detection limit, high in sensitivity and matrix interference resistance and the like.

The invention discloses a production method of unleaded gasoline for a vehicle, wherein the unleaded gasoline is prepared from the following raw materials in parts by weight: 35-65 parts of methanol, 60-30 parts of gasoline, 2-4 parts of isobutyl alcohol, 1-3 parts of acetone, 2-4 parts of methyl tertiary butyl ether, 2-5.5 parts of toluene or dimethyl benzene, 0.01-0.03 part of methyl cyclopentadienyl manganese tricarbonyl, 0.03-0.1 part of butyl octyl zinc thiophosphate and 0.1-3 parts of dicyclopentadienyl iron; the unleaded gasoline is prepared by the method comprising the following steps of: sequentially adding the acetone, the toluene or the dimethyl benzene, the isobutyl alcohol, the methyl tertiary butyl ether, the butyl octyl zinc thiophosphate, the dicyclopentadienyl iron and the methyl cyclopentadienyl manganese tricarbonyl as the raw materials into a container at normal temperature and under normal pressure, fully stirring to obtain a yellow transparent liquid, then adding the yellow transparent liquid into the methanol and fully stirring to obtain modified methanol; adding the modified methanol liquid into the gasoline and uniformly stirring to obtain a finished product. The invention has the advantages of low cost, low pollution, low oil consumption, low corrosion and high power, and each item index of the invention exceeds that of the traditional gasoline.

This invention relates to methyl alcohol diesel oil and its additive, in which, the additive is prepared in the volume ratio of the following raw materials: MTBE 10-15%, normal actane 5-10%, isopropyl acetone 15-20%, n-butyl alcohol 25-30% and methyl cyclopentane 10-35%, and said methyl alcohol is prepared in the volume ratio of the following materials: methyl alcohol 10-25%, diesel oil 70-88% and its additive 2-5%, which solves the technical problems of causticity, swellingness, difficulty of cold starting up, hot air-blocking, separation when meeting water, power reduction, fluidity and emulsification met when using the present methyl acohol.

The invention discloses a welding and cutting gas which consists of a natural gas and a gain agent, wherein the gain agent consists of a rare earth metal compound, a transition metallocene compound, methanol, toluene, methyl tertiary butyl ether, cyclohexane, nonane, decane and water. Compared with acetylene and propane, the welding and cutting gas is more economical, more energy-saving, more environment-friendly, safer and cleaner. The invention also provides a preparation method of the welding and cutting gas.

The invention belongs to the technical field of raw pesticide preparation, particularly relates to preparing and refining methods of difenoconazole. The refining method comprises the following steps of: dissolving prepared raw difenoconazole with isopropanol, then dropwise adding hydrochloric acid (or introducing hydrochloric acid gas) to obtain crystals, filtering and recycling a solvent; filtering out residues, adding water and methylbenzene, and then regulating the pH value to be neutral with ammonia water, demixing and removing water, desolventizing a methylbenzene layer, and then refluxing with isopropyl ether and methyl tertiary butyl ether, freezing for crystallizing, filtering to obtain refined difenoconazole. The product prepared with the refining method has good dissolubility, few impurities and high crystallization rate (about more than 5 hours); and more finished products can be produced once with the method, and the prepared difenoconazole technical has good quality and moderate viscosity.

The invention discloses methanol gasoline with low gas resistance. The methanol gasoline with low gas resistance is prepared by mixing and blending 60-80 wt% of base oil, 10-15 wt% of constituent oil and 10-30 wt% of denatured methanol, wherein the constituent oil is a mixture composed of 25-30 wt% of aromatic oil and 70-75 wt% of naphtha; the denatured methanol is formed by mixing methanol with a volume ratio of 95-98% and a depressurization additive with a volume ratio of 2-5%; the depressurization additive is prepared by blending the main materials of polymethoxy dimethyl ether with 3-6 polymerization degrees and dimethyl carbonate, and the auxiliary materials of ethanol, isopropanol, ethylene glycol monomethyl ether, methyl tertiary butyl ether, isoamylol and isooctanol. According to methanol gasoline with low gas resistance disclosed by the invention, the saturated vapour pressure of the low-proportion methanol gasoline is obviously decreased by changing the property of the base oil and adding the depressurization additive.

The invention provides a method for refining liquefied petroleum gas. The method comprises the following steps: mixing amine-washed liquefied petroleum gas and an alcohol amine solution, and removing carbonyl sulfide and hydrogen sulfide from the liquefied petroleum gas under the coaction of a carbonyl sulfide hydrolysis catalyst and the alcohol amine solution; performing sulfur etherification reaction in contact with a sulfur etherification catalyst to ensure that mercaptan in the liquefied petroleum gas is reacted with olefin and converted into a thioether compound with a high boiling point, and simultaneously performing selective hydrogenation saturation on diolefin; performing distillation treatment, and separating the liquefied petroleum gas fraction from the thioether compound with the high boiling point to obtain a deep desulfurized liquefied petroleum gas product, wherein the refined liquefied gas can be used for producing low-sulfur methyl tertiary butyl ether and alkylation gasoline. According to the method disclosed by the invention, the carbonyl sulfide and the hydrogen sulfide are removed by adopting a one-step method, and the mercaptan is removed by using the catalytic reaction between the raw material components, so that no alkali residue is discharged, the existing process for refining the liquefied petroleum gas is simplified, meanwhile, the purpose of deep desulfurization is achieved, and the sulfur content of the refined liquefied petroleum gas is reduced to below 5mu g/g.

The invention discloses an efficient compound additive of methanol gasoline. The additive is prepared by mixing the following raw materials by weight percent: 10-15% of isopropanol, 40-70% of isooctanol, 2-10% of methyl tertiary butyl ether, 2-10% of tetrahydrofuran, 5-15% of dimethylbenzene, 0.2-0.5% of metal corrosion inhibitors, 0.1-0.4% of rubber swelling inhibitors, 3-10% of detergent dispersants, 0.5-2% of anti-wear lubricant and 0.05-0.3% of antioxidant. The compound additive has the following beneficial effects that the octane number of the methanol gasoline prepared by adopting the additive is high; the additive can be used for preparing 90#, 93#, 95#, 97# and 98# series of products; containing the metal corrosion inhibitors and the rubber swelling inhibitors, the additive can effectively relieve corrosion of the prepared methanol gasoline to the engines and swelling of rubber parts; with reasonably selected and proportioned raw materials and the detergent dispersants, the additive can effectively avoid unstable weight and easy layering of the methanol gasoline; and the additive has the characteristics of safety in use and convenience in preparation.

A novel carbinol gasoline fuel relates to an engine fuel, in particular to a novel liquid fuel for a gasoline engine. According to the weight parts, the novel carbinol gasoline fuel is mixed simply by the following raw materials of the composition: 20-80 of gasoline, 20-90 of carbinol, 2-10 of petroleum ether, 1-5 of 2-methylpentane, 0-5 of octane, 0-5 of isooctane, 0-5 of diethyl carbonate, 0-4 of cinnamene, 0.2-4 of trimethyl borate, 0-5 of dibutyl phosphite, 0.5-5 of dimethyl carbonate, 0-5 of methyl tertiary butyl ether, 0-4 of ether, 0-4 of isopropyl ether, 0-6 of acetone, 0-4 of isopropyl alcohol, 0-5 of isobutyl alcohol and 0-4 of anti-oxidant. The antiknock index is reinforced as the octane number is improved; and the compounding is optimized scientifically during the experiment and practice, thus leading the vehicle to keep the best stability on all aspects when the liquid fuel is in use.

A rapid analysis method of dibromo-acetonitrile comprises sample pre-treatment, instrument condition control and operation measurement. The method is specifically characterized in that in the sample pre-treatment process, adjusting the pH in a range of 4.5-5.0, using any one of ascorbic acid, sodium thiosulfate, sodium sulphite and ammonium chloride as a chlorination reaction termination agent, using any one of methyl tertiary butyl ether, ethyl acetate, normal hexane and normal pentane as an extraction agent, using a gas chromatography-mass spectrum instrument as a main instrument for detecting DBAN, controlling the sample size to be 3 microlitres, and controlling the temperature at the feeding opening at 110-130 DEG C. The analysis method of the invention improves the pre-treatment method of liquid-liquid extraction, establishes a high-efficiency extraction method, and improves recovery rate and enrichment times of the DBAN. The analysis technique can be widely applied to detection of yielding water in large, medium and small feed water treatment plants, to water quality security check for drinking water production units of bottled water and barrelled water, and to the industries with special water quality requirements and water drinking hygienic monitoring and investigation department.

The invention publishes a kind of carbinol for car, which can replace gas. The weight (or cubage) percentage of raw material follows this. Base gasoline is 47%-62%, industrial carbinol is 36%-50%, emulgator, which weight (or cubage) percentage of raw material composed by 36%-48% methyl tertiary butyl ether, 17%-37% methyl ester, 18%-28% aliphatic alcohol, 1%-10% tert butyl alcohol, is 2%-3%. The cost of gas in this invention is lower, its burning rate is more rapid, the capability of defending heat is less than no time and the heat efficiency is higher, so it can not ablate the engine's system offering oil and contaminants by end gas can be reduced very much, thus, it is good for environment.

The invention belongs to the technical field of additives, and in particular relates to a gasoline additive. The gasoline additive consists of the following components in parts by weight: 30-40 parts of methanol, 5-6 parts of isobutanol, 10-15 parts of ethanol, 15-20 parts of methyl tertiary-butyl ether, 20-25 parts of naphtha, 0.1-0.5 part of dimethyl phosphate, 0.8-1.5 parts of tween 80 and 10-30 parts of a mixture of rosin and a camphor extracting solution, wherein the weight percent of rosin is 45% and the weight percent of the camphor extracting solution is 55%. The gasoline additive not only can greatly improve the octane value, but also is environment-friendly and safe, so that the gasoline quality is effectively improved, and the gasoline saving effect is obvious.

The invention discloses efficient natural gas. The efficient natural gas consists of natural gas with purity higher than 95% in percentage by weight, and 0.3-0.5% of a liquid-phase synergistic additive in terms of weight percentage of the natural gas, wherein the liquid-phase synergistic additive consists of the following raw materials: 200# solvent oil, isopropanol, petroleum ether, ethylene glycol monoethyl ether, turpentine, tung oil, isooctyl nitrate, dimethyl carbonate, tert-butylferrocene or ferrocene, methyl tertiary butyl ether or n-octyl ferrocene, p-tert-butylcatechol, azodiisobutyronitrile and polyether. The efficient natural gas, through adding little liquid-phase synergistic additive in the natural gas, can obviously improve burning temperature and burning efficiency; meanwhile, the liquid-phase synergistic additive is low in corrosion and good in volatility on containers.

A process for using methyl tert-butyl ether as hydroxylating agent in tert-butylation reaction of aryhydrocarbon compound features use of acid as catalyst. Its advantages are mild reaction, short reaction time and low cost.

The invention discloses a methanol gasoline additive. The methanol gasoline additive comprises methanol and modifying agent in a weight ratio of (92-97):(3-8), wherein the modifying agent comprises the following materials in percentage by weight: 15-25% of isobutanol, 10-20% of oleic acid, 18-22% of dimethyl carbonate, 7-13% of dimethyl ether, 1-3% of methyl tertiary butyl ether, 12-18% of diethyl ether, 9-11% of acetone, 3-7% of tertiary butanol, 0.8-1.2% of hexamine, and 1.6-2.4% of benzotriazole. The invention further discloses a preparation method for the additive. According to the methanol gasoline additive and the preparation method for the additive provided by the invention, the mutual synergistic effect of a plurality of organic substances is adopted, so that the additive effectively disperses various hydrocarbons in the finished product gasoline, the combustion process is complete and sufficient for reducing the oil consumption by about 6.5-9.8%, reducing the content of CO in the exhausted tail gas by about 40%, and reducing the content of the hydrocarbon compound by about 60%.