摘要:
The present invention relates to a catalyst for catalytic cracking fluidized-bed, and the technical problems to be primarily solved by the present invention are high reaction temperature, low cryogenic activity of catalysts and worse selectivity during the preparation of ethylene-propylene by catalytically cracking naphtha. The present invention uses the composition having the chemical formula (on the basis of the atom ratio): AaBbPcOx, so as to magnificently solve said problems. The present invention therefore can be industrially used to produce ethylene and propylene by catalytically cracking naphtha.
摘要:
The present invention relates to a fluid-bed catalyst for the preparation of ethylene and propylene by catalytic cracking. The main technical problems to be solved are a relatively high reaction temperature, and low activities and poor selectivities of the catalyst at a low temperature, during the reaction for preparing ethylene and propylene by catalytically cracking naphtha. The technical solution of the catalyst is a composition of the chemical formula Mo1.0VaAbBcCdOX based on stoichiometric ratio. It has satisfactorily solved the above-mentioned problems, and is useful in the industrial production of ethylene and propylene by catalytically cracking naphtha.
摘要:
A method for preparation of ethylene and propylene by catalytic cracking using a fluid-bed catalyst. The main technical problems to be solved are a relatively high reaction temperature, and low activities and poor selectivities of the catalyst at a low temperature, during the reaction for preparing ethylene and propylene by catalytically cracking naphtha. The fluid-bed catalyst is a composition of the chemical formula Mo1.0VaAbBcCdOx based on stoichiometric ratio. The method using the fluid-bed catalyst has satisfactorily solved the above-mentioned problems, and is useful in the industrial production of ethylene and propylene by catalytically cracking naphtha.
摘要:
The present invention relates to a catalyst for catalytic cracking fluidized-bed, and the technical problems to be primarily solved by the present invention are high reaction temperature, low cryogenic activity of catalysts and worse selectivity during the preparation of ethylene-propylene by catalytically cracking naphtha. The present invention uses the composition having the chemical formula (on the basis of the atom ratio): AaBbPcOx, so as to magnificently solve said problems. The present invention therefore can be industrially used to produce ethylene and propylene by catalytically cracking naphtha.
摘要:
A catalyst for catalytic cracking in a fluidized-bed is disclosed. The catalyst comprises a support and a composition having the chemical formula (on the basis of the atom ratio): AaBbPcOx for use in the industrial production of ethylene and propylene by catalytically cracking naphtha.
摘要:
A catalyst composition comprising on weight basis the following components: a) 30 to 99.5% of at least one intergrowth molecular sieve; b) 0 to 20% of a rare earth element or oxides thereof; c) 0 to 10% of at least one element from Group VA of the Periodic Table or oxides thereof; d) 0 to 10% of at least one element from Group IIIA of the Periodic Table or oxides thereof; e) 0 to 20% of at least one element from Group IB or IIB of the Periodic Table or oxides thereof; f) 0 to 20% of at least one element from Group IA or IIA of the Periodic Table or oxides thereof; and g) 0 to 65% of a binder, wherein the components b), c), d), e) and f) are supported on the component a), and contents of at least two of the components b), c), d), e) and f) are larger than zero, is described. A process for preparing said catalyst composition and a process for the production of olefins via catalytic cracking by using said catalyst composition are also described.
摘要:
The present invention provides a process for producing lower olefins from methanol or dimethyl ether. The technical problem mainly addressed in the present invention is to overcome the defects presented in the prior art including high operation temperature, low yield and selectivity of lower olefins as the target products, and poor stability and short regeneration period of catalyst. The present process, which is carried out under the conditions of catalytic cracking methanol and dimethyl ether and the presence of diluting gas, and adopts as a feedstock methanol, dimethyl ether or their mixture, comprises the steps of: a) letting the feedstock firstly enter a first reaction zone to contact with a first crystalline aluminosilicate catalyst having a SiO2/Al2O3 molar ratio of at least 10, to thereby produce a first reaction effluent containing lower olefins; b) letting the first reaction effluent enter in turn at least one second reaction zone to contact with a second crystalline aluminosilicate catalyst having a SiO2/Al2O3 molar ratio of at least 10, to thereby produce a second reaction effluent containing lower olefins; and c) separating lower olefins from the second reaction effluent; wherein the weight ratio of the diluting gas to the feedstock is 0.01-6:1, while controlling the reaction conditions.
摘要翻译:本发明提供了由甲醇或二甲醚生产低级烯烃的方法。 本发明主要解决的技术问题是克服现有技术中存在的缺点,包括作为目标产物的低级烯烃的高操作温度,低产率和选择性,以及催化剂的稳定性和较短的再生期。 本工艺在甲醇和二甲醚催化裂解条件下进行,稀释气体的存在,采用甲醇,二甲醚或其混合物为原料,包括以下步骤:a)使原料首先进入 与第一结晶硅铝酸盐催化剂接触的第一反应区,其具有至少10的SiO 2 / Al 2 O 3 N 3摩尔比,至少为10,至 从而产生含有低级烯烃的第一反应流出物; b)使第一反应流出物依次进入至少一个第二反应区以与具有SiO 2 / Al 2 O 3的第二结晶硅铝酸盐催化剂接触 摩尔比为至少10,从而产生含有低级烯烃的第二反应流出物; 和c)从第二反应流出物分离低级烯烃; 其中稀释气体与原料的重量比为0.01-6:1,同时控制反应条件。
摘要:
The present invention provides a process for producing lower olefins by catalytic cracking a feedstock comprising an olefins-enriched mixture containing C4 or higher olefins and optionally an organic oxygenate compound. The technical problem mainly addressed in the present invention is to overcome the defects presented in the prior art including low yield and selectivity of lower olefins as the target products, and short regeneration period of catalyst. The present process, which is carried out under the conditions of catalytic cracking olefins and adopts as a feedstock an olefins-enriched mixture containing one or more C4 or higher olefins and optionally an organic oxygenate compound, comprises the steps of: a) letting the feedstock firstly enter a first reaction zone to contact with a first crystalline aluminosilicate catalyst having a SiO2/Al2O3 molar ratio of at least 10, to thereby produce a first reaction effluent containing lower olefins; b) letting the first reaction effluent enter in turn at least one second reaction zone to contact with a second crystalline aluminosilicate catalyst having a SiO2/Al2O3 molar ratio of at least 10, to thereby produce a second reaction effluent containing lower olefins; and c) separating lower olefins from the second reaction effluent; wherein the reaction temperatures in the first and second reaction zones are controlled. The present process, which desirably solves the above technical problem, can be used in industrial production of lower olefins.
摘要翻译:本发明提供了一种通过催化裂化生产低级烯烃的方法,该原料包含含有C4或更高级烯烃和任选的有机含氧化合物的富含烯烃的混合物。 在本发明中主要解决的技术问题是克服现有技术中存在的缺点,包括低产率和低烯烃作为目标产物的选择性,催化剂的再生时间短。 本发明方法在催化裂化烯烃的条件下进行,并采用含有一种或多种C 4或更高级烯烃和任选的有机含氧化合物的富含烯烃的混合物作为原料,包括以下步骤:a) 首先进入第一反应区以与第一结晶硅铝酸盐催化剂接触,所述第一结晶硅铝酸盐催化剂的SiO 2 / Al 2 O 3 N 3摩尔比为至少10 ,从而产生含有低级烯烃的第一反应流出物; b)使第一反应流出物依次进入至少一个第二反应区以与具有SiO 2 / Al 2 O 3的第二结晶硅铝酸盐催化剂接触 摩尔比为至少10,从而产生含有低级烯烃的第二反应流出物; 和c)从第二反应流出物分离低级烯烃; 其中控制第一和第二反应区中的反应温度。 希望解决上述技术问题的本方法可用于低级烯烃的工业生产。
摘要:
The present invention provides a process for producing lower olefins from methanol or dimethyl ether. The technical problem mainly addressed in the present invention is to overcome the defects presented in the prior art including high operation temperature, low yield and selectivity of lower olefins as the target products, and poor stability and short regeneration period of catalyst. The present process, which is carried out under the conditions of catalytic cracking methanol and dimethyl ether and the presence of diluting gas, and adopts as a feedstock methanol, dimethyl ether or their mixture, comprises the steps of: a) letting the feedstock firstly enter a first reaction zone to contact with a first crystalline aluminosilicate catalyst having a SiO2/Al2O3 molar ratio of at least 10, to thereby produce a first reaction effluent containing lower olefins; b) letting the first reaction effluent enter in turn at least one second reaction zone to contact with a second crystalline aluminosilicate catalyst having a SiO2/Al2O3 molar ratio of at least 10, to thereby produce a second reaction effluent containing lower olefins; and c) separating lower olefins from the second reaction effluent; wherein the weight ratio of the diluting gas to the feedstock is 0.01-6:1, while controlling the reaction conditions.
摘要翻译:本发明提供了由甲醇或二甲醚生产低级烯烃的方法。 本发明主要解决的技术问题是克服现有技术中存在的缺点,包括作为目标产物的低级烯烃的高操作温度,低产率和选择性,以及催化剂的稳定性和较短的再生期。 本工艺在甲醇和二甲醚催化裂解条件下进行,稀释气体的存在,采用甲醇,二甲醚或其混合物为原料,包括以下步骤:a)使原料首先进入 与SiO 2 / Al 2 O 3摩尔比至少为10的第一结晶硅铝酸盐催化剂接触的第一反应区,从而产生含有低级烯烃的第一反应流出物; b)使第一反应流出物依次进入至少一个第二反应区,以与SiO 2 / Al 2 O 3摩尔比为至少10的第二结晶硅铝酸盐催化剂接触,从而产生含有低级烯烃的第二反应流出物; 和c)从第二反应流出物分离低级烯烃; 其中稀释气体与原料的重量比为0.01-6:1,同时控制反应条件。
摘要:
The present invention provides a process for increasing ethylene and/or propylene yield during conversion of oxygenates using a system comprising a reactor and a regenerator, wherein the reactor comprises a fluidized bed reactor and a riser reactor, which process increases ethylene and/or propylene yield by using a mixture of the deactivated catalyst from the fluidized bed reactor and the regenerated catalyst from the regenerator in the riser reactor for further cracking the C4+ hydrocarbon stream separated from the product stream.