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    • 3. 发明申请
    • Process for producing lower olefins from methanol or dimethylether
    • 从甲醇或二甲醚生产低级烯烃的方法
    • US20070038011A1
    • 2007-02-15
    • US11503913
    • 2006-08-15
    • Zaiku XieJuntao LiuWeimin YangSiqing ZhongXiaofeng Chen
    • Zaiku XieJuntao LiuWeimin YangSiqing ZhongXiaofeng Chen
    • C07C4/02
    • C07C11/02B01J2219/0004C07C1/20C07C2529/40Y02P20/52Y02P20/584Y02P30/42
    • 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.
    • 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。
    • 4. 发明申请
    • Process for producing lower olefins by using multiple reaction zones
    • 通过使用多个反应区生产低级烯烃的方法
    • US20070038010A1
    • 2007-02-15
    • US11502520
    • 2006-08-11
    • Zaiku XieJuntao LiuWeimin YangSiqing ZhongYanhui YuanHuiming Zhang
    • Zaiku XieJuntao LiuWeimin YangSiqing ZhongYanhui YuanHuiming Zhang
    • C07C4/02
    • C07C11/02C07C4/06C07C2529/18C07C2529/40C07C2529/70C10G2400/22Y02P20/584Y02P30/42
    • 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.
    • 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。
    • 6. 发明授权
    • Process for producing lower olefins under negative pressure
    • 在负压下生产低级烯烃的方法
    • US07875756B2
    • 2011-01-25
    • US11990401
    • 2006-08-09
    • Zaiku XieJuntao LiuSiqing ZhongWenwei Wu
    • Zaiku XieJuntao LiuSiqing ZhongWenwei Wu
    • C07C4/06
    • C07C4/06C07C4/02Y02P20/52Y02P20/584C07C11/02C07C11/06C07C11/04
    • A process for producing lower olefins is disclosed. The technical problem is to overcome the defects presented in the prior art including high reaction pressure, high reaction temperature, low yield and selectivity of lower olefins as the target products, poor stability and short life of catalyst, and limited suitable feedstocks. The disclosed 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 contact with a crystalline aluminosilicate catalyst having a SiO2/Al2O3 molar ratio of at least 10, to thereby produce a reaction effluent containing lower olefins; and b) separating lower olefins from the reaction effluent; wherein, the reaction pressure is from −0.1 MPa to
    • 公开了生产低级烯烃的方法。 技术问题是克服现有技术中存在的缺点,包括高反应压力,高反应温度,低产物和作为目标产物的低级烯烃的选择性,催化剂的稳定性和寿命短,以及有限的合适原料。 所公开的方法,其在催化裂化烯烃的条件下进行,并且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) 与SiO 2 / Al 2 O 3摩尔比为至少10的结晶硅铝酸盐催化剂接触,从而产生含有低级烯烃的反应流出物; 和b)从反应流出物中分离低级烯烃; 其中反应压力为-0.1MPa至<0MPa。