9 results about "Pentene" patented technology

The invention relates to a catalyst for ternary copolymerization of norbornenes, tetrafluoroethylene and pentenes and a ternary copolymerization method. The catalyst is characterized in that the catalyst is prepared through the following method comprising the steps of: dissolving iron dichloride, a ligand and an alkyl metal compound in a solvent in a dry single-neck glass bottle in an inert gas atmosphere, sealing a bottle mouth through an emulsion pipe, keeping the constant temperature in a water bath at the temperature of 40-50 DEG C for 10-30min, and cooling to obtain an iron complex catalyst. Compared with the prior art, the catalyst provided by the invention is a novel iron complex catalyst which can produce catalytic activity in an nitrogen-protected system at a certain pressure and the temperature of 20-120 DEG C so as to catalyze the ternary copolymerization of the norbornenes with the tetrafluoroethylene and the pentenes, and a product after soaking in methanol is very easy to wash and separate. The catalyst has the characteristics of high copolymer yield, low reaction temperature, low price, easiness in obtainment, high catalytic efficiency and the like.

The invention discloses a method which is used for preparing 2-pentene by separating petroleum C5 fraction and takes raffinate C5 obtained after separating diolefin and isoamylene by extracting as raw materials. The process comprises that the raw materials are extracted and distilled, and the extractant is N and N-dimethylformamide, and the feeding weight ratio of the raw materials and the extractant is 1:5 to 1:12, C5 saturated hydrocarbon materials are discharged from a column top and the materials richly containing 2-pentene and the extractant are obtained in a column bottom; the materials in the column bottom obtained in the process 1 are distilled so as to recycle the extractant, and the materials richly containing 2-pentene are obtained in the column top, and the extractant is obtained in the column bottom, and the extractant can be recycled; the materials in the column top obtained in the process 2 are distilled and separated so as to remove light components, and the materials with light components are discharged from the column top, and the crude product of 2-pentene is obtained in the column bottom; and the crude product of 2-pentene obtained in the process 3 is distilled and refined so as to remove heavy components, materials in the column top are taken and a refined product of 2-pentene is obtained. By processing at a much deeper degree, the method of the invention solves a technical problem that 2-pentene in C5 fraction can not be utilized by the prior art.

The invention provides an n-alkene isomerization catalyst. The catalyst contains 50-90% (by mass) of a molecular sieve and the balance aluminum oxide; the molecular sieve is composed of SAPO-11 and ZSM-5, wherein SAPO-11 accounts for 75-90% (by mass) of the total mass of the molecular sieve, and ZSM-5 accounts for 10-25% (by mass) of the total mass of the molecular sieve; the microparticle size of the molecular sieve in the catalyst is 1-2 micrometers. The catalyst has high n-alkene isomerization activity, the isoalkene yield is high and can be maintained for a long time, a long one-way running cycle is achieved, the decreasing amplitude of regeneration performance obtained after multiple times of scorching is small, and the catalyst is suitable for the process of preparing isobutene from n-butene through an isomerization reaction and the process of preparing isopentene from n-pentene through an isomerization reaction and particularly suitable for the process of preparing isobutene through post-etherification C4 n-butene isomerization.

The invention discloses an oil washing agent for carbon dioxide displacement as well as a preparation method and application thereof, and belongs to the field of carbon dioxide displacement oil extraction. The preparation method of the oil washing agent comprises the following steps: reacting a first monomer with formaldehyde in formic acid to obtain a first reactant; reacting the first reactant with borane, adding an oxidizing agent, and reacting under an alkaline condition to generate a second reactant; and reacting the aromatic hydrocarbon and a second monomer to obtain a third reactant, and reacting the second reactant and the third reactant under the heating condition to obtain the oil washing agent, wherein the first monomer is selected from at least one of 3-phenyl-4-pentene-1-amine, 4-pentene-1-amine, 4-methyl-pentene-1-amine and 2-amino-4-pentenoic acid; the second monomer is selected from at least one of succinic anhydride, 2,3-dimethyl succinic anhydride, glutaric anhydride and adipic anhydride; and the aromatic hydrocarbon is selected from at least one of benzene, methylbenzene and ethylbenzene.

The invention provides a purifying agent for a compound containing aldehyde impurities and application of the purifying agent. The purifying agent comprises borohydride of alkali metal and hydrazine hydrate, wherein the molar percentage of the borohydride of alkali metal is 2-20%, and the molar percentage of the hydrazine hydrate is 80-98%. When the purifying agent is added in the rectification and purification process of crude epoxypropane or crude isopentenyl alcohol containing 50-1000 ppm of aldehyde impurities, the content of the aldehyde impurities can be reduced to 20 ppm or below. The problems that in the prior art, the removal efficiency of impurity aldehydes in the crude epoxypropane or crude isopentenyl alcohol is low, and the purity of the obtained product is limited are solved. The purifying agent provided by the invention is high in impurity removal efficiency and convenient to apply.

The invention discloses an amino phosphate water-soluble corrosion inhibitor and a preparation method thereof. The corrosion inhibitor contains, by weight, 30-45 parts of amino phosphate mixed solutions, 4-6 parts of N-methyl thiourea, 5-10 parts of ethylene glycol monomethyl ether, 5-8 parts of formamide, 5-9 parts of p-hydroxybenzoic acid, 1-5 parts of nonylphenol polyoxyethylene ether, 1-2 parts of octyl phenol polyoxyethylene ether, 6-23.5 parts of water, 8-15 parts of vinyl ethylene glycol ether, 0.5-2.5 parts of3-methyl-2-pentene-4-alkynol and 2-6.5 parts of acetaldehyde methyl hexyl acetal. The amino phosphate corrosion inhibitor has good anti-corrosion effects on an oil and gas field collecting and conveying system with high CO2 (partial pressure of 0-5 MPa) and H2S coexistence (the partial pressure of 0-1 MPa).