32 results about "Amyl ether" patented technology

A process for cracking tert-alkyl ether(s) selected from among tert-amyl methyl ether (TAME) and ethyl tert-amyl ether (ETAE) for the production of tertiary olefins comprising bringing said tert-alkyl ether(s) into contact with at least one catalyst that is formed by at least one mesostructured hybrid organic-inorganic material that consists of at least two spherical elementary particles, whereby each of said spherical particles consists of a mesostructured matrix with a silicon oxide base to which are linked organic groups with acid terminal reactive functions, said groups representing less than 20 mol % of said matrix that is present in each of said spherical elementary particles, which have a maximum diameter of between 50 nm and 200 μm.

The invention discloses a method for manufacturing alcohol gasoline, comprising the following steps: mixing amyl alcohol and amyl ether in a certain proportion in 95% of industrial alcohol to obtain denatured alcohol for later use; proportionally selecting fatty alcohol-polyoxyethylene ether, dimethyl carbonate, ethyl oleate and para-tertiary butyl phenol; adding the selected substances into a vessel in sequence to be stirred for 20-30min to prepare a alcohol gasoline modifier for later use; and adding 70% of gasoline into 26% of denatured alcohol to be fully stirred until the mixture is uniform, then adding 4% of the gasoline modifier and fully mixing the mixture, thus obtaining the finished alcohol gasoline. The product is unstratified, has good stability, no corrosion and swelling, strong explosive power, easily obtained raw materials and low manufacturing cost, is not emulsified and is convenient to use.

The invention discloses a synthetic method of tert-amyl ethyl ether (TAEE). The method uses 2-methyl butene and ethyl alcohol as raw materials, and aluminum based composite metal oxide loaded with cesium acid phosphotungstate as a catalyst, and carries out synthesis of TAEE under the following conditions: reaction temperature of 100-180 DEG C, reaction pressure of 2.0-6.0MPa, liquid hourly volume space velocity of 2-methyl butene of 1.0-5.0 / h, and molar ratio of ethanol and 2-methyl-butane of 1.0:1-8.0:1. The method uses a fixed bed process for continuous synthesis of TAEE, and has the advantages of high conversion rate of raw materials and long running period.

An adsorbent separates methanol and other alcohols from gas and liquid oxygenates and hydrocarbon streams with a low silica faujasite (LSX) in a mono-, bi, or tri-cation alkali and / or alkaline-earth metal forms. The LSX has silicon to aluminum ratio from about 0.9 to about 1.15 and an ion exchange degree for each alkali or alkaline-earth metal in the range of about 10 to about 99.9% equiv. The gas streams for treatment include natural gas, individual hydrocarbons, or vaporized alkyl esters of carboxylic acids, or methyl tert-alkyl ethers and their mixtures with hydrocarbons. The liquid streams include liquefied natural gas (LNG), liquefied petroleum gas (LPG), natural gas liquid (NGL), individual hydrocarbons C3-C5, and monomers, alkyl esters of carboxylic acids including methyl acetate, methyl, ethyl, butyl acrylates and methacrylate, methyl tert-alkyl ethers including methyl tert-butyl ether (MTBE) and methyl tert-amyl ether (TAME). The adsorbent is especially suited for temperature swing or pressure swing adsorption processes.

The invention relates to a method for separating and recycling CO2 from mixed gas containing CO2, comprising a CO2 separation process and a novel absorbent, wherein, the separation process is composed by gas absorption technology, four-stage flash evaporation deabsorption technology and N2 air stripping absorbent regeneration technology, and the novel absorbent is composed by one or any two of normal or isomeric propyl ether, butyl ether and amyl ether. By adopting the absorbent and process in the invention, the content of CO2 in the purified gas can reach below 0.4%; the purity of extracted CO2 can reach over 96.5%; and the recovery rate of CO2 in the raw material mixed gas can reach over 86%. In the invention, the operating pressure of the process is normally 2.0 MPa to 4.0 MPa, and generally the virgin gas does not need to be pressurized, thus being capable of saving compression energy consumption. Cold energy recovery and excess pressure power recovery are carried out on the extracted gas flow in the invention, thus saving the separation energy consumption of CO2 and realizing the gas purification with low consumption and the liquid collecting of CO2.

The invention provides a purification technology of methyl tert-amyl ether purity standard substance raw material, comprising steps: (1) precision rectification: under normal pressure, adding industrial-grade methyl tert-amyl ether into a rectification tower, the rectification tower Built-in packing, obtain the methyl tert-amyl ether product from the top of the rectification tower, discard the front fraction with more impurities to obtain the sample to be adsorbed; (2) adsorption: at normal temperature, transfer the sample to be adsorbed obtained in step (1) to Adsorption tower, the adsorption tower has a built-in adsorbent, and the methyl tert-amyl ether product is obtained from the bottom of the adsorption tower; (3) Filtration: at normal temperature, the methyl tert-amyl ether product obtained in step (2) is passed through an organic microporous membrane Filter to obtain high-purity methyl tert-amyl ether. The purification technology of the present invention can solve the difficulty in the prior art that various trace impurities are difficult to remove, and the obtained methyl tert-amyl ether has a purity higher than 99.9%, less impurities and can be used as a standard substance.

The invention provides an anti-explosion gasoline cleansing agent, which is prepared by compounding methyl amyl ether / methyl tert-butyl ether mixed liquor and dimethylaniline according to the volume ratio of 1:(1-2), wherein the methyl amyl ether / methyl tert-butyl ether mixed liquor is distillate mixed liquor of a product obtained by reacting equal volumes of raw materials tert-butyl alcohol and pentanol with methanol under the catalysis of sulfuric acid. After 0.5 to 1 weight percent of anti-explosion gasoline cleansing agent is added into gasoline, the octane value of the gasoline can be remarkably improved, and high environmental intermiscibility is achieved.

The invention discloses a method for preparing high-quality mercaptoacetic acid from a tail solution from O-alkyl-N-alkyl thinocarbamate production. The method comprises the following steps: (1) performing acidizing treatment on the tail solution by using an inorganic acid, and controlling the pH value to be 0.5-1.5; (2) leaving to stand for 6-48 hours, separating suspended organic matters, extracting by using an organic solvent, and extracting by using an extraction agent, thereby obtaining an extraction liquid, wherein the volume ratio of the total amount of the organic solvent to an acidifying liquid is (2.5:0.01)-(2.5:0.1), the organic solvent consists of 40-60wt% of glutaric acid diethyl ester and 40-060wt% of ethyl malonic acid diethyl ester, the volume ratio of the total amount of the extracting agent to a new acidifying liquid is (2:0.1)-(2:2), and the extracting agent is prepared by mixing n-amyl ether, isoamyl ether and sec-butyl methyl ether in a mass ratio of (1-3):(1-3):(1-3); (3) removing the solvent and water from the extraction liquid, thereby obtaining crude acid; (4) performing flash evaporation on the crude acid. The method is high in recycling rate, high in product purity, good in quality and simple in process.

The invention discloses a synthesis method of oseltamivir. The synthesis method of oseltamivir comprises the following steps: starting from a compound 1,3-butadiene-3-amyl ether and compound 3-nitro-ethyl acrylate, carrying out Diels-Alder reaction, then reacting at room temperature in acetonitrile in the presence of a copper catalyst and PhI-NNs to prepare an aziridine compound in a one-pot method, wherein the mole ratio of the 1,3-butadiene-3-amyl ether to 3-nitro-ethyl acrylate to the copper catalyst is 1.1: 1: 0.025-0.1; and finally synthesizing the oseltamivir for preventing bird flu through the aziridine ring opening, nitryl and p-nitrobenzene sulfonyl removal, acetylation and hydrogenation. The method comprises short steps, the used reagent is cheap and easily available, the operation is simple, the total yield is up to 40%, and the method is a simple and efficient synthesis method of oseltamivir.

The invention discloses a method for modifying a sulfonic cation exchange resin, and a methyl tert-amyl ether preparation method. According to the present invention, a sulfonic cation exchange resin is soaked in a low-carbon alcohol solvent, and the soaked sulfonic cation exchange resin is subjected to gas stripping treatment with an inert gas, such that the specific surface area and the pore sizestructure of the resin are improved, and the stability and the selectivity of the sulfonic cation exchange resin catalyst are improved; and with the application of the modified resin as the catalystin the preparation of methyl tert-amyl ether at a temperature of 80-160 DEG C under a pressure of 0.1-3.0 MPa by using C5 olefin and methanol as raw materials, the continuous production can be achieved, the advantages of high conversion rate, good stability and the like can be provided, and the method is the new environmentally friendly process.

The invention discloses a cation exchange resin modification method and a methyl tert-amyl ether preparation method. According to the present invention, a sulfonic cation exchange resin is soaked sequentially with toluene and methyl isobutyl ketone, and soaking in stages is performed with distilled water, such that the specific surface and the pore size structure of the resin can be improved, andthe stability and the selectivity of the sulfonic cation exchange resin catalyst can be improved; and with the application of the modified resin as the catalyst in the preparation of methyl tert-amylether at a temperature of 75-250 DEG C under a pressure of 0.5-3.0 MPa by using C5 olefin and methanol as raw materials, the continuous production can be achieved, the advantages of high conversion rate, good stability and the like can be provided, and the method is the new environmentally friendly process.

The invention provides a preparation method for S-(-)-1,1-diphenyl-1,2-propylene glycol, which belongs to the field of organic synthesis. The method comprises the following steps: with bromobenzene and magnesium as raw materials and iodine as a catalyst, preparing a Grignard reagent in an organic solvent through a Grignard reaction; with ethyl lactate as a raw material, subjecting ethyl lactate and the Grignard reagent to an addition reaction in the organic solvent under the protection of nitrogen; adding water after the reaction is finished, adjusting a pH value with inorganic acid, carrying out extraction and layering and collecting an organic layer for concentration; and carrying out recrystallization in an organic dissolvent so as to obtain S-(-)-1,1-diphenyl-1,2-propylene glycol. The organic solvent used in the method is an ether, namely, one selected from the group consisting of diethyl ether, butyl ether, amyl ether, tetrahydrofuran and dioxane, reaction temperature is 20 to 70 DEG C, and reaction time is 2 to 6 h, and a mol ratio of bromobenzene to magnesium to iodine is 1: 0.9-1.2: 0.001-0.002. According to the invention, the raw materials are easily available, cost is low, operation in reaction process is clear, the product S-(-)-1,1-diphenyl-1,2-propylene glycol has good purity and higher yield, the method is suitable for industrial production, and production efficiency is improved.

The invention discloses a preparation method of a rare earth modified gasoline additive. S1: Co-precipitate the lanthanum nitrate, cerium nitrate and cobalt nitrate solution by adding sodium hydroxide dropwise to obtain a precursor solution; calcinate at a high temperature to obtain La / Ce / Co ternary composite oxide; S2: disperse it in polyvinylpyrrolidone, add a surface modifier to obtain a surface-modified rare earth composite oxide; S3: weigh short-chain alcohol, perfluoropolyether by weight , ethyl tert-butyl ether, dipolyethylene glycol monomethyl pentyl ether, butyl acetyl ricinoleic acid ester, fluorine-containing diamine compound; after mixing evenly, add rare earth composite oxide and cage-type silsesquisil oxane to obtain the rare earth modified gasoline additive. The rare-earth modified gasoline additive prepared by the invention not only solves the problems of engine carbon deposition and fuel stratification, but also improves the overall performance of the engine, prolongs the service life of the engine, and has a huge market application prospect.

The invention relates to a comprehensive processing method for olefins in Fischer-Tropsch synthesis light distillate oil. The high-temperature Fischer-Tropsch synthesis C5 light distillate oil is used as raw material, and the raw material is extracted and rectified, and the extractant is N, N-dimethyl formazan Amide, the enriched 1-pentene material obtained at the top of the extractive distillation tower, is further purified by precision rectification to obtain 1-pentene product, and the C5 component and extractant mixture obtained at the bottom of the tower enter the solvent recovery tower for recovery Extractant for recycling; the carbon five components obtained from the top of the solvent recovery tower are subjected to olefin isomerization through the isomerization reactor; the carbon five components rich in isomerized olefins obtained from the isomerization reactor are mixed with methanol enter the etherification reactor together for etherification reaction; the outlet material of the etherification reactor enters the catalytic rectification tower, and realizes the separation of the product methyl tert-amyl ether while carrying out the etherification reaction in the catalytic rectification tower. At the bottom of the distillation tower, the industrially required methyl tert-amyl ether product is obtained. The invention obtains high value-added carbon pentaolefin 1-pentene and clean high-octane gasoline additive methyl tert-amyl ether through deep processing of Fischer-Tropsch carbon five distillate oil.

The invention provides an anti-explosion gasoline cleansing agent, which is prepared by compounding methyl amyl ether / methyl tert-butyl ether mixed liquor and dimethylaniline according to the volume ratio of 1:(1-2), wherein the methyl amyl ether / methyl tert-butyl ether mixed liquor is distillate mixed liquor of a product obtained by reacting equal volumes of raw materials tert-butyl alcohol and pentanol with methanol under the catalysis of sulfuric acid. After 0.5 to 1 weight percent of anti-explosion gasoline cleansing agent is added into gasoline, the octane value of the gasoline can be remarkably improved, and high environmental intermiscibility is achieved.

The present invention provides a methyl tert-amyl ether preparation method. According to the present invention, a strong acid cation exchange resin catalyst suitable for catalyzing the etherificationbetween C5 olefin and methanol is placed into a low-carbon alcohol solution and is subjected to high-temperature high-pressure treatment, such that the specific surface and the pore size structure ofthe resin can be improved, and the stability and the selectivity of the sulfonic cation exchange resin catalyst can be improved; and the methyl tert-amyl ether is prepared at a temperature of 80-200 DEG C under a pressure of 0.1-4.0 MPa by using C5 olefin and methanol as raw materials, such that the continuous production can be achieved, the advantages of high conversion rate, good stability and the like can be provided, and the method is the new environmentally friendly process.