49results about How to "High reaction space velocity" patented technology

The invention relates to a hydrogeneration catalyst for the tail gas of a Crouse sulphur recycle device and a preparation method for the catalyst. A nickel-based Crouse tail gas hydrogeneration catalyst, which is characterized in that the catalyst essentially comprises a main active component, a secondary active component and alumina, the mass percentage of each component is like follows: the mainactive component 20.1-60%, the secondary active component 0-10%, the alumina 40-79.9%, the sum of the three components is 100%; wherein, the main active component is nickel oxide, the secondary active component is one or the mixture of any two or three of chrome oxide, copper oxide and iron oxide, when the secondary active component is a mixture, the compounding ratio among the oxides is random.The invention has the advantages of the good catalyzing activity at low temperature and the low cost.

The invention discloses a production process for preparing hydrogen peroxide by using an anthraquinone process. The production process comprises the following steps: sequentially connecting a hydrogenation hyper-gravity reactor, an oxidation hyper-gravity reactor and an extraction hyper-gravity reactor in series; inputting hydrogen and an anthraquinone-containing solution into a feeding cavity to perform gas-liquid two-phase high-efficiency mixing, and forming a gas-liquid mixture to carry out a hydrogenation reaction so as to obtain a working solution containing oxanthranol; inputting oxygen and the working solution containing oxanthranol into the feeding cavity to perform gas-liquid two-phase high-efficiency mixing, and forming a gas-liquid mixture to carry out an oxidation reaction so as to obtain a working solution containing hydrogen peroxide and anthraquinone; enabling the working solution containing hydrogen peroxide and anthraquinone and deionized water to enter the extraction hyper-gravity reactor to extract; and separating after extraction, thereby obtaining the hydrogen peroxide. According to the production process, gas-liquid solid-phase mass transfer can be intensified by insoluble hydrogen by efficiently utilizing reducing hydrogen when the liquid solubility reaches supersaturation; and moreover, according to the method disclosed by the invention, the hydrogenation efficiency is more than or equal to 13g / L, and the oxidation reaction conversion rate is more than or equal to 95%.

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.

The invention discloses a combined hydrogenation method of producing chemical materials. The method comprises the steps of: mixing hydrocracking material oil with hydrogen, and then entering a mixture into a hydrorefining reactor and a first hydrocracking reactor by adopting a once serial process; further cracking 10-100% diesel fraction with the temperature of 175-320 DEG C in the second hydrocracking reactor which is arranged in a diesel refining unit, wherein the cracked oil is a mixed fraction of naphtha and diesel; and further fractioning the mixed fraction in a fractionating system of the diesel refining device to obtain light naphtha, high-aromatic latent heavy naphtha and the diesel fraction. By adopting the method disclosed by the invention, the hydrocracking device and the diesel refining device are combined to produce the chemical material; and the reaction pressure of the diesel refining device is low and middle pressure, and improvement of the aromatic latent of the heavy naphtha and reduction of hydrogen consumption are facilitated in the second hydrocracking process.

The invention relates to the field of preparation of synthetic gas through dry reforming of methane, and discloses a method for preparing synthetic gas through dry reforming of methane. The loading amount of an active metal component Ni in a catalyst in a catalyst bed of a dry reforming reaction of methane is controlled, and a Al2O3 carrier and / or a Al2O3 carrier modified with an auxiliary agent is adopted. Even in relatively high reaction velocity, temperature dispersion of the catalyst bed is basically uniform, and an area where carbon is easily thermodynamically accumulated can be avoided, so that the catalytic stability of a catalyst is greatly improved and the service life of the catalyst can be prolonged.

The invention discloses a two-stage fluidized bed CO dehydrogenation purification reaction technology and a used catalyst. The reaction technology is as follows: two fluidized beds are in up-and-down arrangement, a reaction gas is fed in from the bottommost of a reactor, and enters an upper fluidized bed reactor for reaction, after heat exchange condensation of the gas reacted in the upper fluidized bed reactor, a gas phase component is used as a carbonylation reaction raw material gas, and a liquid component enters a storage tank. A catalyst used in a lower fluidized bed is PdAgClx / TiO2 (x = 1-3), can be used for selective oxidation of H2 at low temperature to reduce or avoid consumption of CO raw material gas, the H2 in the raw material gas CO is reduced to 5000ppm or less after reaction in the lower fluidized bed, a catalyst used in an upper fluidized bed is PdO-Ag2O / TiO2, can be used for oxidatively transform the H2 as much as possible at high temperature, and the H2 in the CO raw material gas is reduced to 50ppm or less after reaction in the upper fluidized bed. The method can effectively solve the industrial enlargement problem of raw material gas CO oxidation dehydrogenation process in coal-based ethylene glycol synthesis technology.

The invention relates to a catalyst and a method for preparing butane-2 by C_4 olefin hydroisomerization, and the catalyst and the method are mainly used for solving the technical problems in the prior art of low reaction balance index, low olefin yield and high catalyst cost. In order to better solve the problems, the technical scheme adopted by the invention is as follows: the catalyst comprises the following components in parts by weight: (a) 10-20 parts of metal nickel or an oxide thereof; (b) 0.1-5 parts of metal molybdenum or an oxide thereof; (c) 75-90 parts of aluminum oxide-silicon dioxide composite carrier, wherein the pore volume of the catalyst is 0.5-0.9 ml / g, the specific surface area is 150-190 m<2> / g, the average aperture is 13-16 nm, and the pore volume with pore diameter larger than 10 nm occupies 20-60% of the total pore volume. The catalyst can be used in the industrial production of increasing the production of butane-2 by C_4 fraction.

The invention relates to a method for preparing alkylene glycol, and mainly solves the problems of short service life and poor heat resistance of the catalyst used in the prior art under the condition of high conversion rate and selectivity. The present invention uses alkylene oxide and water as raw materials, at a reaction temperature of 60 to 150°C, a reaction pressure of 0.5 to 2.0 MPa, a water / alkylene oxide molar ratio of 5 to 15:1, and a liquid space velocity of 3 to 10 MPa. 6 hours -1 Under conditions, the raw material is contacted with a macroporous composite resin catalyst to generate an alkylene glycol, wherein the macroporous composite resin catalyst includes monomers, comonomers, nanomaterials, initiators, and auxiliary agent one and auxiliary agent two components, and OH for macroporous composite resin - , Cl - 、HSO 4 - 、HCO 3 - or HCOO - The technical scheme of anion compound treatment solves this problem well, and can be used in the industrial production of ethylene oxide catalytic hydration to form dihydric alcohol.

The invention relates to a kind of method of manufacturing ethylene glycol by homogeneous catalysis hydration with ethylene epoxide. The invention mainly solves the problems existed in previous technique, such as large use amount of catalyst, difficulty of separate and reclaiming-recycling usage, longer reaction time or long reaction time with no catalyst, and low selectivity of ethylene glycol. In the process of homogeneous catalysis hydration to manufacture ethylene glycol with ethylene epoxide, the invention uses neutral salt or weak acid salt or their mixture that all have solubility in reaction medium as catalyst, and controls the weight percent concentration of catalyst in reaction system with 10-3000ppm. The technique scheme described above can solve the problems mentioned above, and can be used in industrial production of homogeneous catalysis hydration to manufacture ethylene glycol with ethylene epoxide.

The invention relates to a method for preparing alkylene dihydric alcohols, and mainly solves the problems of short service life and poor heat resistance of catalysts used in the prior art under conditions of high conversion rate and selectivity. The present invention uses alkylene oxide and water as raw materials, at a reaction temperature of 60 to 150°C, a reaction pressure of 0.5 to 2.0 MPa, a water / alkylene oxide molar ratio of 5 to 15:1, and a liquid space velocity of 3 to 10 MPa. 6 hours -1 Under the conditions, the raw material is contacted with the composite resin catalyst to generate alkylene glycol, wherein the composite resin catalyst includes monomers, comonomers, nanomaterials, initiators and auxiliary components, and the composite resin uses OH - , Cl - 、HSO 4 - 、HCO 3 - or HCOO - The technical scheme of anion compound treatment solves this problem well, and can be used in the industrial production of ethylene oxide catalytic hydration to form dihydric alcohol.