30results about How to "Increase the rate of isomerization" patented technology

The invention relates to a light hydrocarbon isomerization method comprising the following steps: light hydrocarbon materials are firstly separated by a de-isopentane tower, tower top streams are extracted as isomerization products, and tower bottom streams enter a front isomerization reactor to generate isomerization reaction; liquid phase streams obtained by the gas-liquid separation of outlet streams of the front reactor are separated in a de-isohexane tower, and tower top streams and tower bottom streams of the de-isohexane tower are extracted and then mixed with the tower top streams of the de-isopentane tower and are together taken as a gasoline-stripping stabilization system of the isomerization products; siding streams of the de-isohexane tower are extracted into a rear isomerization reactor; and liquid phase streams obtained by the gas-liquid separation of reaction streams of the rear isomerization reactor completely return and are mixed with the liquid phase streams of a gas-liquid separator of the front isomerization reaction system and together taken as feeding materials of the de-isohexane tower. The method has higher normal paraffin isomerization ratio, wherein the C6 normal paraffin realizes the complete isomerization basically, thereby greatly improving the octane number of the light hydrocarbon materials.

The invention discloses a cyclane hydro-conversion catalyst. The catalyst comprises carriers and active metals Pt and Zn. The carriers are composed of hydrogen-type Y / Beta / ZSM-12 composite molecular sieves and inorganic refractory oxides. In the carriers of the catalyst, by weight, the content of the hydrogen-type Y / Beta / ZSM-12 composite molecular sieves is 10wt%-90wt%, the specific surface area of the hydrogen-type Y / Beta / ZSM-12 composite molecular sieves is 600 m<2> / g-800 m<2> / g, and the pore volume is 0.30 cm<3> / g-0.40 cm<3> / g. The content of the active metal Pt of the catalyst, by weight, is 0.02%-0.04%, and the content of Zn of the catalyst, by weight, is 0.5%-15%. When used for cyclane hydro-conversion, the catalyst is advantaged by high conversion rate, high cyclane ring opening rate, high isomerization rate and low cracking rate.

The invention relates to a C5 / C6 alkane low-temperature isomerization method. According to the method, raw materials enter an isopentane-removing tower to remove moisture and separate into an isopentane fraction and an isopentane-removed fraction; the isopentane-removed fraction and hydrogen are dried and then enter an isomerization reactor to carry out an isomerization reaction under the condition of low temperature so as to generate an isomerization reaction product; the isomerization reaction product enters a depentanizer to produce a pentane fraction and an isohexane fraction; the isohexane fraction goes into a downstream process; after heat exchange with materials at the bottom of the isopentane-removing tower, the pentane fraction which is used as a reboiler heat source of the isopentane-removing tower is divided into two paths; after being used as a feedstock of the isopentane-removing tower to remove the isopentane fraction, one path enters the reaction feed process again; and the other path used as top reflux of the depentanizer returns back to the depentanizer again. The method provided by the invention has advantages of low plant investment, low energy consumption, high isomerization rate of products and octane number and the like.

The invention relates to a catalyst for selective hydrogenation of butadiene, and mainly solves the technical problems of high catalyst cost and high n-butene loss in the prior art. The catalyst for selective hydrogenation of butadiene comprises the following components in parts by weight: (a) 5-20 parts of metal nickel or oxide thereof; (b) 0.5-4 parts of metals in IB group or oxides thereof; (c) 0-2 parts of alkali metals or oxides thereof; (d) 75-88 parts of a carrier aluminum oxide. The technical scheme better solves the technical problem, and can be applied to selective hydrogenation of materials containing butadiene.

The invention relates to a low-temperature isomerization method for low-carbon normal alkanes, wherein the low-temperature isomerization method includes the following steps: (1) carrying out heat exchange of a light hydrocarbon raw material containing normal C5 and normal C6 as principal components with an isomerization product, and after heat exchange, rectifying to obtain heterogeneous C5, normal C5 and a heavy hydrocarbon; (2) rectifying the heavy hydrocarbon again, to obtain heterogeneous C6 and a heavy hydrocarbon, mixing the normal C5 with the heavy hydrocarbon, and then supplementing chlorine; (3) carrying out drying dehydration on the material obtained after chlorine supplement, mixing with dried fresh hydrogen and circulating hydrogen, heating, and carrying out an isomerization reaction under the action of a catalyst after heating; and (4) after carrying out heat exchange of the isomerization product with a fresh raw material, carrying out first gas-liquid separation, wherein the obtained non-condensable gas is circulating hydrogen; and carrying out gas-liquid separation on the obtained liquid again, mixing the obtained liquid with a fresh raw material, and then rectifying. The yield of the liquid product obtained by the low-temperature isomerization method is more than 98%, the isomerization rate is 60%-90%, and the octane value can be increased by 10-30.

The invention discloses a method for preparing industrial fructose by chemically catalyzing isomerization of glucose. The steps are as follows: (1) prepare aqueous glucose solution, add borax and sodium hydroxide to the aqueous glucose solution in sequence, then add magnesium-based solid base, and react under an inert atmosphere ; (2) After the reaction, recover the solid alkali catalyst through solid-liquid separation, send the liquid into the electrodialysis system, separate the glucose and fructose complexes, and obtain the fructose borate complex solution; (3) complex the fructose borate The fructose solution flows through the boron special-effect resin to remove borax and sodium hydroxide to obtain pure fructose products. The invention adopts the combination of homogeneous base catalysis and heterogeneous solid base catalysis, which not only applies to higher substrate concentration, but also improves the isomerization rate and fructose selectivity. The simple and efficient separation of the latter provides the possibility for the development of large-scale industrial fructose-based fuels and chemicals, and has a good application prospect.

The invention discloses a butadiene hydrogenation and 1-butene isomerization catalyst. The catalyst is composed of an active component amorphous nickel phosphide, an alumina carrier, an auxiliary agent X1 and an auxiliary agent X2. In the final catalyst, The weight of nickel in the amorphous nickel phosphide is calculated as metallic nickel, accounting for 5-12% of the total catalyst weight, the molar ratio of phosphorus to nickel is 2.0-2.4:1, and the molar ratio of auxiliary agent X1 to nickel is 0.01-0.05: 1. The molar ratio of auxiliary agent X2 to nickel is 0.5-1.5:1, and the rest is a carrier. The auxiliary agent X1 is selected from at least one rare earth element, and the auxiliary agent X2 is selected from at least one alkaline earth metal element. The catalyst is a non-precious metal catalyst, which has catalytic activity comparable to that of a noble metal catalyst in the process of selective hydrogenation of C4 raw materials to remove butadiene, and can greatly reduce the cost of the catalyst. At the same time, the catalyst of the present invention also has extremely high 1‑butene isomerization activity.

The invention discloses a naphthenic hydrocarbon hydro-conversion catalyst and a preparation method and application thereof. The naphthenic hydrocarbon hydro-conversion catalyst comprises a carrier active metal Pt, wherein a carrier consists of 10 to 90 weight percent of hydrogen-type Y-Beta composite molecular sieve, and an inorganic refractory oxide; and the active metal Pt content of the catalyst is 0.05 to 0.6 percent. The catalyst is prepared by an immersion method; and the obtained catalyst can be applied to hydro-conversion of various naphthenic hydrocarbon-containing raw materials andhas high conversion rate, high naphthenic hydrocarbon ring opening rate and low cracking rate.

The invention relates to a molecular sieve-containing alumina pellet and a preparation method thereof. The preparation method comprises: (1) preparing a mixed sol: mixing pseudoboehmite, urea and deionized water to obtain an aluminum hydroxide suspension; Adding the first acid solution to the aluminum hydroxide suspension for the first peptization to obtain an alumina sol; mixing the alumina sol with molecular sieves and adding the second acid solution for the second peptization to obtain a mixed sol; (2) heating oil Column molding to produce alumina pellets containing molecular sieves: mix the mixed sol obtained in step (1) with hexamethylenetetramine and drop them into a hot oil column to form pellets, take out the pellets, wash, dry and roast , to obtain alumina pellets containing molecular sieves. The molecular sieve-containing alumina pellets provided by the invention have high molecular sieve content and high crushing strength.

The invention provides an environment-friendly process for producing motor gasoline from naphtha, which belongs to the technical field of coal chemical industry. C 4‑ Component, C 5 / C 6 components and C 7+ component, where C 5 / C 6 Components undergo hydroisomerization reaction to obtain isoparaffin oil, C 7+ The components are reformed to obtain aromatic oil, and the C 4‑ After components, isoparaffin oil and aromatic oil are mixed evenly, motor gasoline is obtained. The present invention is an environmentally friendly process for producing ultra-low-sulfur, olefin-free, high-octane clean motor gasoline, which has the advantages of simple method, mild reaction conditions, low cost, and can significantly increase the octane value of motor gasoline, and has wide applications. prospect.

The invention relates to a heterocyclic azobenzene high-polymer energy storage material and a preparation method thereof. Heterocyclic azobenzene with a monomer molecular formula of C9N5H9 exists on a high-polymer side chain to achieve trans-cis heat storage and cis-trans heat release; and a high-polymer chain is polymethyl methacrylate (PMMA). The grafting density of a heterocyclic ring is that every 3-10 carbon atoms are grafted with one heterocyclic azobenzene. The maximum isomerization rate of the energy storage material provided by the invention reaches 90%, and is improved by 15% compared with monomer molecules; and the maximum heat storage density reaches 130Wh / kg and is improved by nearly 55% compared with the monomer molecules. The obtained azo heterocyclic molecule, compared with an azobenzene molecule, is greatly improved in the aspect of energy storage density in a half-life period, and has a great potentiality in the aspect of heat storage. The exothermic peak of a polymer material is scanned with DSC, then released energy is obtained by performing integration on the exothermic peak using software, and then the released energy is divided by quality to obtain an extremely good heat storage density which reaches 130Wh / kg.