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:
A hydrocarbon dehydrogenation process utilizing a novel catalyst composite. The catalyst composite comprises a Group VIII noble metal component, a Group IA or IIA metal component, and a component selected from the group consisting of tin, germanium, lead, indium, gallium, thallium, or mixtures thereof, all on an alumina support comprising essentially theta-alumina, having a surface area from about 50 to about 120 m2/g, an apparent bulk density of at 0.5 g/cm3 and a mole ratio of the Group IA or IIA metal component to the component selected from the group consisting of tin, germanium, lead, indium, gallium, thallium or mixtures thereof greater than about 16.
摘要翻译:一种利用新型催化剂复合材料的烃脱氢方法。 所述催化剂复合材料包括VIII族贵金属组分,IA族或IIA族金属组分,以及选自锡,锗,铅,铟,镓,铊或其混合物的组分,全部在氧化铝载体上,包含 基本上是θ-氧化铝,其表面积为约50至约120m 2 / g,表观堆积密度为0.5g / cm 3,IA或IIA族金属组分与组分的摩尔比 选自锡,锗,铅,铟,镓,铊或大于约16的混合物。
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。
摘要:
The invention provides a method to avoid catalyst damage and achieve longer catalyst life by selecting appropriate materials for reactor spacers, liners, catalyst binders, and supports, in particular, by not using crystalline silica-containing and high phosphorus-containing materials, if the presence of even small amount of steam is anticipated. In addition, alkali metals and alkaline earth metals are avoided due to potential damage to the catalyst.