59results about How to "Long life one way" patented technology

The invention provides a light hydrocarbon aromatization catalyst which comprises a composite carrier and modified components, wherein the modified components comprise the following compositions which are calculated based on the carrier in mass percentage by mass percent: 1.0-10.0% of ZnO, 0.5 to 10.0% of rare earth oxide; the composite carrier comprises 10 to 90% of H zeolite socony mobile-5 (HZSM-5) and 10 to 90% of silica. The catalyst preparation is simple and has high aromatization activity and selectivity on light hydrocarbon, and the carbon-depositing amount of the catalyst after reaction is less. With mixed C4 as a raw material for aromatization reaction, the yield of aromatics reaches 50 % by mass and the one-way service life of the catalyst lasts as long as 700 hours.

The invention relates to a light-hydrocarbon aromatized catalyst which comprises the following components according to the mass percent: 20-75 percent of zeolite with MFI structure, 20-75 percent of aluminum phosphate and 0.5-8.0 percent of zinc oxide. The catalyst is used for the light-hydrocarbon aromatization reaction and has better aromatization activity, low carbon deposition rate in the reaction and long one-way service life.

The invention relates to a multistage porous ZSM-5 molecular sieve. The molecular sieve comprises the following raw materials: a silicon source, an aluminum source, a template agent, water, an alkalisource, polyether polyol, a seed crystal, a cosolvent and a mineralizer. The invention provides a preparation method of the multistage porous ZSM-5 molecular sieve with a high silicon-aluminum ratio.The synthesis process is simple, and cheap template agent and porous agent are adopted, so that the economic cost of the molecular sieve is reduced. The ZSM-5 molecular sieve obtained by the method has a multistage pore channel structure, the relative crystallinity is higher than 90%, and the specific surface area is greater than 420m<2>/g.

The invention relates to a preparation method for preparing a gasoline catalyst with methanol. The preparation method is characterized by comprising the following steps of: before molding the catalyst, performing aluminum-removing and silicon replenishing treatment on a catalyst matrix nanoscale ZSM-5 molecular sieve with an acid solution to adjusting the acidic property of the molecular sieve; and after the catalyst is molded, pretreating the catalyst by using a hydrothermal aging device to enhance the gasoline selectivity and stability of the catalyst. When the catalyst prepared with the method is applied to a reaction for preparing gasoline with methanol on a section of fixed bed, the gasoline yield is up to 36-37 percent.

The invention discloses a catalyst for preparing ethylbenzene by reacting ethylene with benzene. The catalyst comprises a modified ZSM-5 molecular sieve, a modified ultrastable Y-type molecular sieve and an inorganic oxide, wherein the modified ZSM-5 molecular sieve consists of a ZSM-5 molecular sieve and 0.1wt%-10wt% of rare earth metal oxide which is supported on the ZSM-5 molecular sieve; a mole ratio of SiO2 to Al2O3 in the ZSM-5 molecular sieve is 30-500; the modified ultrastable Y-type molecular sieve consists of an ultrastable Y-type molecular sieve, 0.1wt%-6wt% of alkaline earth metal oxide and 0.1wt%-10wt% of rare earth metal oxide; a mole ratio of SiO2 to Al2O3 in the ultrastable Y-type molecular sieve is 4-15; the alkaline earth metal oxide and the rare earth metal oxide are supported on the ultrastable Y-type molecular sieve; the inorganic oxide is one or a mixture of more than two of aluminium oxide, zinc oxide and silicon oxide; a weight ratio of the modified ZSM-5 molecular sieve to the modified ultrastable Y-type molecular sieve and the inorganic oxide is (35%-85%):(5%-40%):(10%-55%).

The invention discloses a method for continuously synthesizing diphenylamine by utilizing phenylamine. Phenylamine raw material contacts with hydrogen before entering into a reactor, the hydrogen is dissolved into the phenylamine raw material, the phenylamine raw material with the dissolved hydrogen enters into a reactor used for continuously synthesizing diphenylamine by virtue of phenylamine, the phenylamine raw material with the dissolved hydrogen passes through a catalyst bed layer, and a diphenylamine synthesizing reaction by virtue of the phenylamine is carried out, wherein the catalyst bed layer contains no gas-phase hydrogen. Compared with the prior art, the method disclosed by the invention has the advantage that the dissolved hydrogen substitutes for massive gas-phase recycled hydrogen while conversion rate of the reaction, selectivity of a target product and service life of a catalyst are guaranteed, so that equipment investment and operation energy consumption are greatly reduced, and reduction of production cost can be facilitated.

A catalyst for producing gasoline by refinery dry gas comprises 1.0-13.0 m% of VA-group element oxides, 0.1-5.0 m% of rare earth oxide, and 86-98.9 m% of a composite carrier; the composite carrier comprises 15-75 m% of ZSM-5 zeolite, 15-75 m% of ZSM-35, and 10-70 m% of a binder.

The invention provides a method for removing aldehyde and ketone in a HPPO process recycling methanol by using a molecular sieve catalytic reaction. A molecular sieve is modified by an ion exchange method, the recycling methanol containing the aldehyde and ketone impurities from the HPPO process is pumped at a certain airspeed in a fixed bed reactor with a modified molecular sieve, the modified molecular sieves catalyze the reaction of the aldehyde and ketone with the methanol at a certain temperature and pressure to form corresponding acetals and ketals, and the purified recycling methanol for removing the aldehyde and ketone impurities is obtained. The process for removing the aldehyde and ketone impurities is simple, and does not produce nitrogen-containing wastewater, and the modifiedmolecular sieve catalyst can be regenerated by simple high-temperature baking.

The invention discloses a hierarchical pore nanometer SAPO-34 molecular sieve, a preparation method and applications thereof, and relates to the field of catalysis, wherein the hierarchical pore nanometer SAPO-34 molecular sieve is a nanometer flaky molecular sieve with a thickness of 10-100 nm, an average particle size of 300-1000 nm, a micropore size of 0.38-0.5 nm, a mesopore size of 2-30 nm, aspecific surface area of 400-600 m<2>/g, and a pore volume of 0.3-0.6 cm<3>/g. According to the present invention, the hierarchical pore nanometer SAPO-34 molecular sieve is obtained through co-treatment with HF and NH4F; and with the application of the hierarchical pore nanometer SAPO-34 molecular sieve in MTO reactions, the selectivity of low-carbon olefins can be improved, the content of C5<+>is low, and the one-way service life of the catalyst is prolonged.

A catalyst for producing a gasoline component by aromatization of naphtha and methanol includes a carrier and active components having contents calculated based on the carrier as follows: 0.1-5.0% bymass of Ag, 1.0-15.0% by mass of a VA group element oxide, 0.1-3.0% by mass of a rare earth element oxide; and the carrier includes 40-80% by mass of ZSM-5 zeolite, 3-30% by mass of aluminum oxide, and 5-30% by mass of amorphous aluminum silicate. The catalyst can promote the naphtha and the methanol to produce a co-aromatization reaction to form the gasoline component with a high-octane value, and can produce a high-quality liquefied gas by side.

The invention discloses a preparation method for double-terminated glycol ether. The preparation method comprises the following steps: a) introducing raw materials containing glycol monoether and monohydric ether alcohol into a reactor for contact and reaction with an acidic molecular sieve catalyst under the conditions that reaction temperature is 50 to 300 DEG C, reaction pressure is 0.1 to 15 MPa, the mass space velocity of the glycol monoether in the raw materials is 0.01 to 15.0/h, and a mol ratio of monohydric ether alcohol to glycol monoether in the raw materials is 1-100: 1, and separating obtained products so as to obtain a double-terminated glycol ether product, unreacted glycol monoether and monohydric ether alcohol, by-product components and other components; and b) returning the unreacted glycol monoether and monohydric ether alcohol and the by-product components obtained in the step a) to the reactor. The preparation method has the advantages that the catalyst has long single-pass life; the target product, i.e., double-terminated glycol ether has high yield and selectivity; energy consumption in separation of the products is low; by-products have high economic value; production scale can be large or small; and application of the method is flexible.

The invention relates to a catalyst for preparing butene/butadiene by dehydrogenation of butane and an application of the catalyst, and mainly solves the problems of low butane conversion rate, and poor single-pass stability and regeneration stability in conventional preparation technologies. According to the invention, firstly, zirconia, chromium oxide and oxides of at least one element selectedfrom a group consisting of IIIA, IVA, VA and IIB in the periodic table of elements are introduced into an aluminum oxide carrier by a dry mixing method to obtain a composite metal-oxide carrier; thenthe loading of iridium (Ir) and ruthenium (Ru) components is performed by an impregnation method, that is, water solutions of soluble salts of iridium (Ir) and ruthenium (Ru) are employed for impregnation; and the catalyst is obtained after drying and calcination. The problems are well solved with the technical scheme that n-butane is used as a raw material, under the conditions that the reactiontemperature is in a range of 530-650 DEG C, the reaction pressure is in a range of 0.1-0.4 MPa, the mass space velocity of the n-butane is in a range of 0.1-6.0 h<-1>, and the volume ratio of H<2>O toC<n>H<2n+2> is in a range of 0.1-16, the raw material contacts with the catalyst and reacts to form the butene/butadiene. The technical scheme can be used in the industrial preparation of the catalyst for preparing butene/butadiene by the dehydrogenation of n-butane.

The invention discloses a catalyst for preparing hydrocarbons from oxygen-containing compounds, and a preparation method and application thereof. The catalyst, on a basis of total weight, comprises 35-84% of ZSM-5 molecular sieve, 15-60% of a binder and 0.1- 15% of modified elements. The catalyst is prepared by preparing modified ZSM-5 molecular sieve, mixing the ZSM-5 molecular sieve with the binder and performing extrusion molding, and post-processing. The catalyst is used for preparing hydrocarbons from oxygen-containing compounds, is high in catalytic activity, good in hydrocarbon selectivity, long in single pass life and simple in preparation process.

The invention discloses a regeneration method of a deactivated titanium-silicon catalyst. The method comprises the following steps: (1) mixing a deactivated titanium-silicon catalyst wet material withregenerated mixed liquid, and grinding the mixture by adopting a colloid mill to obtain a uniform material; (2) performing hydrothermal crystallization on the uniform material obtained in the step (1) to obtain a crystallized product; and (3) filtering, washing and calcining the crystallized product obtained in the step (2) to obtain a regenerated catalyst, wherein the mass ratio of the deactivated titanium-silicon catalyst wet material to the regenerated mixed liquid is 1:(1-10). The obtained regenerated catalyst, prepared with the regeneration method of the deactivated titanium-silicon catalyst provided by the invention, has the advantages that the activity is recovered to a fresh agent level, the single-path life is obviously prolonged when the catalyst is used for cyclohexanone ammoximation reaction, only once washing is required during the entire regeneration process, the loss of the catalyst and the generated wastewater are less, the regeneration process is short, the regeneration cost is low, and industrial amplification is easy.

The invention relates to a carrier of a catalyst for preparing low-carbon alkene by dehydrogenation of low-carbon alkane and an application of the carrier, and mainly solves problems that in the priorpreparation art, a carbon deposit quantity of a catalyst is large, in a usage process, performance decline is quick, and regeneration is frequent. The carrier adopted by the invention comprises a Nb2O5.b MoO3.c MxOy.d SiO2, wherein M is one or more selected from Ge, Sn and Pb, SiO2 is at least one selected from diatomite, silicon oxide and a high-silicon Y type molecular sieve; and the carrier comprises the following components calculated by an oxide, by weight: 15-35.0% of Nb2O5; 5.0-15.0% of MoO3; 1.0-10.0% of MxOy; and 50-70% of SiO2, when the above technical scheme is used for preparing the low-carbon alkene by dehydrogenation of the low-carbon alkane, the problems are better solved, and the carrier can be used in industrial preparation of the catalyst for preparing the low-carbon alkene by dehydrogenation of the low-carbon alkane.

The invention provides a method for producing aromatic hydrocarbons and/or liquid fuels through light hydrocarbon dehydrogenation aromatization, which comprises the following steps: 1) under dehydrogenation reaction conditions, carrying out dehydrogenation reaction on light hydrocarbon material flow to obtain material flow containing olefin; and 2) under aromatization reaction conditions, contacting the material flow containing olefin with an aromatization catalyst, and carrying out oligomerization/aromatization reaction to obtain a material flow containing aromatic hydrocarbon and/or liquid fuel. According to the method, dehydrogenation and oligomerization/aromatization are separated and executed step by step under different conditions, a zeolite molecular sieve loaded with an active metal component is used as an aromatization catalyst, and under an optimal low-temperature aromatization condition, the high alkane conversion rate, the high carbon utilization rate and the high single-cycle aromatic hydrocarbon production capacity can be obtained through the method disclosed in the invention; and the catalyst is slow in deactivation, long in one-way service life, easy to regenerate and good in multi-cycle stability.