30 results about "Ethyl tertiary-butyl ether" patented technology

The invention provides a method for preparing a high-performance Y-type molecular sieve membrane and an application to the separation of organic mixture. The method is characterized in that a new high-temperature closed hydro-thermal synthesis reaction method is adopted, a layer of dense NaY-type molecular sieve membrane forms on the surfaces of three porous tubular support body. The synthetic time of preparation process is short, and the process of the membrane forming is simple. The membrane prepared by the method has fewer defects, the synthesized NaY-type molecular sieve membrane is used in the separation of organic mixtures by adopting a self-control permeating and vaporizing device, the process of the separation is simple and is easy to be operated and controlled, the separating property is good, the Y-type molecular sieve membrane has high permeation flux and high separation factor while the Y-type molecular sieve membrane is applied to methanol / methyl tert-butyl ether, ethanol / ethyl tertiary butyl ether and benzene / cyclohexane, the NaY-type molecular sieve membrane particularly synthesized by stainless steel support body has extremely high permeation flux.

The invention discloses an alcohol-ether-ester methanol fuel. The alcohol-ether-ester methanol fuel is prepared from the following raw materials in percentage by weight: 60-80% of methanol, 10-20% of lower alcohol, 5-15% of ether and 5-12% of ester, wherein the lower alcohol is a mixture of ethanol, propanol, glycerol and isobutanol, the ether is a mixture of ethyl tertiary-butyl ether, methyl tert-pentyl ether, ethyl tert-pentyl ether and diisobutyl ether and the ester is a mixture of ethyl acetate, diethylene glycol fatty acid ester and dibutyl phthalate. By the alcohol-ether-ester methanol fuel, the problems of insufficient power, corrosiveness and swelling properties of the alcohol fuel are solved, the automobile engine need not to be modified, the gasoline can be directly replaced, the methanol fuel is clean and environmentally friendly, the exhaust emission is greatly reduced and the cost is low.

The present invention relates to a process for the extraction of the unsaponifiable fraction contained in vegetable oils, oils or vegetable butters derived from microorganisms or in by-products from the vegetable oil refining industry (eg deodorization emissions). Said process comprises at least: A) a process comprising converting the aforementioned oils, butter or by-products from the vegetable oil refining industry or oils originating from microorganisms into a water-alcoholic solution by means of, inter alia, selected from the steps of saponification and esterification step; B) comprising the step of extracting said hydro-alcoholic solution by means of liquid / liquid extraction, wherein the fat fraction is separated from the unsaponifiable fraction; and C) comprising the optional step of purifying said unsaponifiable fraction, Said purification is selected from steps of crystallization and liquid / liquid extraction. According to the present invention, at least one of the liquid / liquid extraction step in step B, the crystallization step in step C and the liquid / liquid extraction step in step C is performed using a first solvent system comprising a concentration of Expressed as at least 50% by volume of solvent relative to the total volume of the solvent system, the solvent is selected from: fluorinated aromatic solvents (especially trifluorotoluene (BTF) and hexafluorobenzene (BHF)); tert-butyl ethers (especially 2‑ethoxy‑2‑methylpropane, also known as ethyl tert-butyl ether (ETBE)); solvents containing at least one silicon atom (especially hexamethyldisiloxane (HMDS ) and tetramethylsilane (TMS)); methyltetrahydrofuran (MeTHF) and mixtures thereof. The invention also relates to the fractions obtained using this method and to compositions containing said fractions.

This patent application provides a process for the preparation of ethyl tert-butyl ether etherification. The process for the preparation of ethyl tert-butyl ether etherification includes the pre-reaction stage of the fixed-bed reactor and the subsequent reaction stage of the catalytic distillation tower. , the fresh material containing isobutene mixed C4 and ethanol is pumped into the fixed bed reactor according to the alcohol-ene ratio of 0.8-1.0:1, at a temperature of 40-60°C and a material space velocity of 0.5-2.0h ‑1 , The reaction pressure is 0.8-1.5MPa for pre-reaction, and the liquid phase product is sent to the reaction section of the catalytic distillation tower through the pipeline. The technical solution effectively reduces the alcohol-ene molar ratio of the raw material, improves the conversion rate and selectivity of the etherification reaction, and greatly reduces the material consumption and energy consumption of the preparation process and the purity of the ethyl tert-butyl ether product.

The invention discloses a carbonaceous substance inhibitor and its application in the flotation of molybdenum-nickel ore with high carbon molybdenum-nickel ore. The inhibitor contains the following components in parts by weight: 40-120 parts of acid orange, 20-60 parts Parts of ethyl tert-butyl ether and 60 to 180 parts of CMC. The invention also discloses a flotation method using the inhibitor, the flotation method includes three steps of grinding, molybdenum flotation and nickel flotation, each of the molybdenum flotation and nickel flotation undergoes 1 to 2 roughing , 2 to 4 selections and 1 to 3 sweeps. Finally, molybdenum concentrate and nickel concentrate are obtained. Compared with the prior art, the new inhibitor and its flotation method of the present invention have high separation efficiency, can effectively realize the separation of molybdenum-nickel minerals and carbonaceous substances, improve the grade of molybdenum and nickel concentrates, and have low ore dressing cost, The technological process is simple and reliable, and the operation is easy.

The invention discloses an environmentally friendly gasoline additive, which is composed of the following raw materials in parts by weight: 1-5 parts by weight of short-chain alcohol; 3-7 parts by weight of core-shell structure cerium oxide / silicon dioxide particles; cage-type silsesquioxane 2.5-7.5 parts by weight of alkane; 0.5-3 parts by weight of perfluoropolyether; 10-30 parts by weight of ethyl tert-butyl ether; 5-10 parts by weight of dipolyethylene glycol monomethyl pentyl ether; 1-6 parts by weight of ricinoleic acid ester; 2-8 parts by weight of fluorine-containing diamine compound. The environment-friendly gasoline additive of the present invention not only solves the problems of environmental pollution, engine carbon deposits, and fuel stratification caused by gasoline combustion, but also improves the power, anti-corrosion, anti-rust and lubricating performance of the engine, and reduces the wear and tear of the engine. The service life of the engine is prolonged, and it is more conducive to large-scale popularization and application. The invention also discloses a preparation method of the environment-friendly gasoline additive.