摘要:
The present invention refers to a fast fluidized-bed reactor, device and method for preparing propylene and C4 hydrocarbons from oxygen-containing compounds. The device comprises the fast fluidized-bed reactor and a fluidized-bed regenerator for regenerating a catalyst. The method includes: a) feeding a raw material containing the oxygen-containing compounds from n reactor feed distributors to a dense phase zone of the fast fluidized-bed reactor, and contacting the raw material with a catalyst, to generate a stream containing target product and a spent catalyst containing carbon; b) sending the stream discharged from the fast fluidized-bed reactor containing target product into a product separation system, obtaining propylene, C4 hydrocarbons, light fractions and the like after separation, returning 70 wt.% or more of the light fractions to the dense phase zone of the fast fluidized-bed reactor from the reactor feed distributor at the bottom-most of the fast fluidized-bed reactor, and reacting ethylene and the oxygen-containing compounds to perform an alkylation reaction in presence of the catalyst, to produce products of propylene and the like. The method and device of the present invention improve the reaction rate of ethylene alkylation, and the unit volume production capacity of reactor is high.
摘要:
The present invention relates to a method for preparing a light olefin using an oxygen-containing compound, and a device for use thereof. More specifically, the present invention provides a method for preparing a light olefin using an oxygen-containing compound, taking methanol and/or dimethyl ether as main starting materials, using a multi-stage (n‰¥2) dense phase fluidized bed reactor and a multi-stage (m‰¥2) catalyst regenerator; the invention solves the problem in the prior art of the uniformity of catalyst carbon deposition and the carbon content being difficult to control and the light olefin selectivity being low.
摘要:
The present invention provides a method for producing methyl acetate, and the method comprises a step in which dimethyl ether and a raw gas containing carbon monoxide and hydrogen go through a reactor loaded with a catalyst for carrying out a carbonylation reaction; wherein the catalyst contains an acidic EMT zeolite molecular sieve. The present invention has provided a new method for producing methyl acetate. In the method of the present invention, the carbonylation is carried out in the presence of the catalyst containing the acidic EMT zeolite molecular sieve, and the reaction activity is high, and the stability has been significantly improved, meeting the requirement of industrial production.
摘要:
The present invention provides a method for producing a light fatty acid alkyl ester with the formula of R 1 -COO-R 2 , and the method comprises a step in which a alkyl ether with formula of R 1 -O-R 2 and a raw gas containing carbon monoxide go through a reactor loaded with a catalyst for carrying out a carbonylation reaction; wherein the catalyst contains an acidic EMT zeolite molecular sieve; wherein R 1 and R 2 are independently selected from C 1 -C 4 alkyl groups. The present invention has provided a new method for producing light fatty acid alkyl ester. In the method of the present invention, the carbonylation is carried out in the presence of the catalyst containing the acidic EMT zeolite molecular sieve, and the reaction activity is high, and the stability has been significantly improved, meeting the requirement of industrial production.
摘要:
Disclosed is a method for preparing a double end capped glycol ether, the method comprising: introducing into a reactor a raw material comprising a glycol monoether and a monohydric alcohol ether, and enabling the raw material to contact and react with an acidic molecular sieve catalyst to generate a double end capped glycol ether, a reaction temperature being 50-300°C, a reaction pressure being 0.1-15 MPa, a WHSV of the glycol monoether in the raw material being 0.01-15.0 h -1 , and a mole ratio of the monohydric alcohol ether to the glycol monoether in the raw material being 1-100:1. The method of the present invention enables a long single-pass lifespan of the catalyst and repeated regeneration, has a high yield and selectivity of a target product, low energy consumption during separation of the product, a high economic value of a by-product, and is flexible in production scale and application.
摘要翻译:本发明公开了一种制备双封端乙二醇醚的方法,所述方法包括:将包含乙二醇单醚和一元醇醚的原料引入反应器中,并使所述原料与酸性分子筛催化剂接触并反应以 产生双封端乙二醇醚,反应温度为50-300℃,反应压力为0.1-15MPa,原料中乙二醇单醚的WHSV为0.01-15.0 h -1,摩尔比为 原料中一元醇醚与乙二醇单醚的摩尔比为1:100:1。 本发明的方法能够实现催化剂和重复再生的长单程寿命,具有目标产物的高收率和选择性,分离产物时的低能量消耗,副产物的高经济价值, 生产规模和应用灵活。
摘要:
This invention belongs to the field of nanomaterials. Specifically relates to a kind of hierarchical porous material and its preparation method. A kind of hierarchical porous material is disclosed, and said hierarchical porous material is composed of primary pore aggregates, the primary pore aggregates get together and formed the secondary pore aggregates, then the secondary pore aggregates connect to each other formed the hierarchical porous material; there are primary pores on said primary pore aggregates wherein the diameter of primary pore is 5∼500 nm; there are secondary pores on said secondary pore aggregates wherein the diameter of secondary pore is 1∼5 µm. Compared with existing technology, said hierarchical porous materials of this invention has apparent advantages of large surface area, high usage of precious metal and so on, which facilitating its mass transfer reaction when used as oxygen reduction reaction catalysts and other special applications. The preparation method of said hierarchical porous materials of this invention is green, simple, easy and low-cost as well as controllable pore size and porosity of hierarchical porous materials during preparation. When said hierarchical porous materials is used as oxygen reduction reaction (ORR) catalysts or photocatalysts, the catalytic activity can be improved significantly.
摘要:
The present invention provides a method for preparing methyl formate and coproducing dimethyl ether. A raw material containing formaldehyde and methanol is introduced into a First Reaction Region contacting with a Catalyst A to react, and the post-reaction material is separated to obtain Constituent I. The Constituent I is introduced into a Second Reaction Region contacting with a Catalyst B to react, and the post-reaction material separating is separated to obtain methyl formate, dimethyl ether and Constituent II. At least 1% of dimethyl ether is taken as product, and the rest of dimethyl ether is recycled to the First Reaction Region. The Constituent II is recycled to the Second Reaction Region. In the raw material, the molar ratio range of formaldehyde to methanol is from 1:4 to 1:0.05, and the molar of formaldehyde and methanol are calculated according to the molar of carbon atoms contained in formaldehyde and methanol, respectively. The weight hourly space velocity of formaldehyde in the raw material ranges from 0.01 h -1 to 15.0 h -1 . The reaction temperature of the First Reaction Region ranges from 50°C to 100°C. The reaction temperature range of the Second Reaction Region is from 50°C to 200°C, and the reaction pressure range is from 0.1 MPa to 10 MPa. Each component is gaseous phase and/or liquid phase, independently. The method shows benefits, including a long catalyst life, a mild reaction condition, a high utilization ratio of raw materials, an achievement of continuous production and an application potential of large scale industrial.
摘要:
This application provides a catalyst for producing paraxylene by co-conversion of methanol and/or dimethyl ether and C 4 liquefied gas, and preparation and application thereof. The catalyst is an aromatization molecular sieve catalyst with a shape-selective function co-modified by bimetal and siloxane compound. Methanol and/or dimethyl ether and C 4 liquefied gas are fed in reactor together, wherein aromatization reaction occurring on a modified shape-selective molecular sieve catalyst. The yield of aromatics is effectively improved, in which paraxylene is the main product. In products obtained by co-conversion of methanol and/or dimethyl ether and C 4 liquefied gas, the yield of aromatics is greater than 70wt%, and the content of paraxylene in aromatics is greater than 80wt%, and the selectivity of paraxylene in xylene is greater than 99wt%.
摘要:
This invention relates to a method for preparing p-xylene and propylene from methanol and/or dimethyl ether. This method comprises coupling two reaction processes, an aromatization reaction of methanol and/or dimethyl ether and an alkylation reaction of ethylene with methanol and/or dimethyl ether. The method of this invention produces p-xylene and propylene with a high selectivity by returning an ethylene-enriched component in reaction byproducts from preparation of p-xylene from methanol and/or dimethyl ether to the reaction system for performing alkylation reaction with methanol and/or dimethyl ether in the presence of catalysts.