Spherical catalysts to convert hydrocarbons to light olefins
    1.
    发明申请
    Spherical catalysts to convert hydrocarbons to light olefins 有权
    将烃转化为轻质烯烃的球形催化剂

    公开(公告)号:US20050080307A1

    公开(公告)日:2005-04-14

    申请号:US10951359

    申请日:2004-09-28

    摘要: The present invention comprises a process for producing propylene comprising the steps of contacting an olefin feed containing between about 40 and about 80 wt-% olefins and between about 20 and about 60 wt-% olefins and aromatics with a spherical catalyst to form a cracked product, the catalyst comprising about 30 to about 80 wt-% of a crystalline zeolite, the reaction conditions including a temperature from about 500° to 650° C., a hydrocarbon partial pressure of 70 to 280 kPa (10 to 40 psia), a liquid hourly space velocity in the range of 5 to 40 hr−1 and wherein propylene comprises at least 90 mol-% of the total C3 products.

    摘要翻译: 本发明包括一种生产丙烯的方法,包括以下步骤:将含有约40至约80重量%的烯烃和约20至约60重量%的烯烃和芳族化合物的烯烃进料与球形催化剂接触以形成裂化产物 ,催化剂包含约30至约80重量%的结晶沸石,反应条件包括约500℃至650℃的温度,70至280kPa(10至40psia)的烃分压, 在5至40小时-1的范围内的液时空速,其中丙烯包含总C3产物的至少90摩尔%。

    Conversion of oxygenate to propylene using moving bed technology and a separate heavy olefin interconversion step
    3.
    发明申请
    Conversion of oxygenate to propylene using moving bed technology and a separate heavy olefin interconversion step 有权
    使用移动床技术和单独的重质烯烃相互转化步骤将含氧化合物转化为丙烯

    公开(公告)号:US20060161035A1

    公开(公告)日:2006-07-20

    申请号:US11036312

    申请日:2005-01-14

    IPC分类号: C07C1/00

    摘要: The average propylene cycle yield of an oxygenate to propylene (OTP) process using a dual-function oxygenate conversion catalyst is substantially enhanced by the use of a combination of: 1) moving bed reactor technology in the catalytic OTP reaction step in lieu of the fixed bed technology of the prior art; 2) a separate heavy olefin interconversion step using moving bed technology and operating at an inlet temperature at least 15° C. higher than the maximum temperature utilized in the OTP reaction step; 3) C2 olefin recycle to the OTP reaction step; and 4) a catalyst on-stream cycle time of 700 hours or less. These provisions hold the build-up of coke deposits on the catalyst to a level which does not substantially degrade dual-function catalyst activity, oxygenate conversion and propylene selectivity, thereby enabling maintenance of average propylene cycle yield for each cycle near or at essentially start-of-cycle levels.

    摘要翻译: 使用双功能含氧化合物转化催化剂的含氧化合物对丙烯(OTP)方法的平均丙烯循环产率通过使用以下组合使用而显着增强:1)催化OTP反应步骤中的移动床反应器技术代替固定 现有技术的床技术; 2)使用移动床技术的单独的重质烯烃相互转化步骤,并且在入口温度下操作至少比在OTP反应步骤中使用的最高温度高15℃; 3)C 2 O 2烯烃循环至OTP反应步骤; 和4)催化剂流动循环时间为700小时以下。 这些规定将催化剂上的焦炭沉积物积聚到基本上不降低双重功能催化剂活性,含氧化合物转化率和丙烯选择性的水平,从而使得在每个循环附近或基本上开始维持平均丙烯循环产率, 的循环水平。