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

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 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 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 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 hydrogenation conversion catalyst for naphthenic hydrocarbon. The catalyst comprises a carrier and active metal Pt and Zn, wherein the carrier comprises hydrogen type Y-Beta composite molecular sieve and inorganic refractory oxide. The hydrogen type Y-Beta composite molecular sieve accounts for 10-90 wt% of the catalyst carrier (calculated by the weight of the catalyst carrier), and has specific surface area of 500-700 m<2>/g, and pore volume of 0.25-0.45 cm<3>/g. The active metal Pt accounts for 0.02-0.4 wt% of the catalyst (calculated by the weight of the catalyst); and the Zn accounts for 0.5-15% of the catalyst (calculated by the weight of the catalyst). The catalyst has low content of noble metal, and shows high conversion rate, high ring opening rate of naphthenic hydrocarbon, high isomerization rate and low cracking rate for hydrogenation conversion of naphthenic hydrocarbon.

The invention discloses a light alkane isomerization method. The method comprises the following steps: successively carrying out dehydration treatment and rectification treatment on a light alkane raw material, letting the treatment product contact with a chlorine-containing alumina catalyst, and carrying out hydroisomerization to obtain an isomerization product, wherein the chlorine-containing alumina catalyst is obtained after chlorine is introduced into an alkane solution containing alkyl aluminum chloride. isomerization activity of the chlorine-containing alumina catalyst can be effectively enhanced, yield of isoalkane is raised, and octane number of the isomerization product is increased.

The invention discloses a low-carbon alkane isomerization method. The method comprises the following steps: after carrying out dehydration treatment, rectification treatment, desulfurization treatment and deoxidization treatment on low-carbon alkane raw materials in sequence; enabling the low-carbon alkane raw materials to be in contact with a chlorine-containing aluminum oxide type catalyst; carrying out hydroisomerization reaction to obtain an isomerized product, wherein the chlorine-containing aluminum oxide type catalyst is used for introducing chlorine by adopting an alkane solution containing alkyl aluminum chloride. According to the method disclosed by the invention, the activity of the chlorine-containing aluminum oxide type isomerization catalyst can be effectively improved and the yield of isomerized alkane is properly improved; the octane value of the isomerized product is increased.

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.

The invention relates to a molecular sieve-containing alumina pellet and a preparation method thereof. The preparation method comprises: (1) preparation of a mixed sol: mixing pseudo-boehmite, urea and deionized water to obtain an aluminum hydroxide suspension liquid, adding a first acid solution to the aluminum hydroxide suspension liquid, carrying out first peptization to obtain an alumina sol,mixing the alumina sol and a molecular sieve, adding a second acid solution, and carrying out second peptization to obtain a mixed sol; and (2) preparation of molecular sieve-containing alumina pelletby hot oil column molding: mixing the mixed sol obtained in the step (1) and hexamethylenetetramine, adding into a hot oil column in a dropwise manner, molding to obtain pellets, taking out the molded pellets, washing, drying, and roasting to obtain the molecular sieve-containing alumina pellet. According to the present invention, the obtained molecular sieve-containing alumina pellet has characteristics of high molecular sieve content and high crushing strength.

The invention discloses a catalyst for selective hydrogenation of butadiene and isomerization of 1-butylene. The catalyst is composed of an active component, i.e., amorphous nickel phosphide, an alumina carrier, an auxiliary agent X1 and an auxiliary agent X2. In a final catalyst, the weight of nickel in amorphous nickel phosphide, in terms of metallic nickel, accounts for 5 to 12% of the total weight of the catalyst, a mol ratio of phosphorus to nickel is 2.0-2.4: 1, a mol ratio of the auxiliary agent X1 to nickel is 0.01-0.05: 1 and a mol ratio of the auxiliary agent X2 to nickel is 0.5-1.5: 1, with the balance being the carrier; and the auxiliary agent X1 is at least one selected from rare earth elements, and the auxiliary agent X2 is at least one selected from alkali earth metals. The catalyst is a non-noble metal catalyst, has catalytic activity equivalent to the catalytic activity of a noble metal catalyst when applied to selective hydrogenation of a C4 raw material for removal of butadiene, can substantially reduce catalyst cost, and shows high 1-butylene isomerization activity.

The invention relates to a catalyst and a method for preparing butene-2 through butene-1 hydroisomerization. The technical problems in the prior art the n-butene hydroisomerization is low in conversion rate, the total olefin yield is low and the butene-2 is low in selectivity are mainly solved. With the adoption of the technical scheme, a mixed-phase alumina carrier consisting of theta-phase alumina and delta-phase alumina is adopted, the theta-phase alumina accounts for 60-90wt%, and the delta-phase alumina accounts for 10-40wt%. The problems are well solved, and the catalyst and method can be used for industrial production of cracking C4 fractions and increasing the yield of butene-2.