英语翻译

From propylene , ammonia and air montecatini edison’s highly active, low bulk density fluid catalyst gives acrylonitrile at lowest cost
Giorgio Caporali , Montecatini Edison S.p.A,Milan ,Italy
Since about 1960,the leading route to acrylonitrile has been by catalytic reaction of propylene with ammonia and air。 Montedison’s process was first commercialized in 1968 in their 60,000-ton/year plant. This process has been licensed to Paular CO. in Spain for a 40,000-ton/year plant and montedison is planning another plant for themselves with 100,00 ton/year capacity.
Although modern commercial acrylonitrile process appear similar and produce very pure product ,each is characterized by its own original features:
Catalyst system and rector technique
Nature, condition and sequence of recovery and purification step.
These step and features in the Montecatini Edison process are shown in FIG .1 and other data may be found in the literature.
RAW materials . There are only three reactants, the oxygen being supplied as air and no stream is repuired as diluent . Technical grade propylene(92-93 percent,the balance being propane ) and anhydrous fertilizer grade ammonia are satisfactory. Higher olefins are undesirable since they make byproducts which burden the purification steps. The there gaseous reactants are premixed and fed to the bottom of the reactors.
Reactors. Large size fluid bed catalytic reactors are used which provide:
A bottom distribution plate for supporting the catalyst and distributing the gas;
A top set of multiple effect cyclones, with dip legs ,recover and return the catalyst to near the bottom of the reaction zone;
Special sets of heat exchangers in the fluid bed for reaction heat removal and steam generation.
Reaction conditions . Typical reaction condition values are: 420-460。C ; 2kg/cm2 absolute pressure ;feed composition ranging from 6.7-8 vol. percent propylene ,0.2-0.6percent propane,7.5-9percent ammonia,82.5-86percent air (which gives a minimum excess ammonia with respect to propylene and about 50percent stoichiometric excess air); liner gas velocity between 1 and 2 feet per second(based on empty reactor with total inlet gases volume at average operating conditions);and contact time in the order of a few second,e.g.,2to 6 second when gas volume is based as stated above, at the average operating conditions and referred to the volume of the packed catalyst.
Catalyst The catalyst consists of oxygenated compounds of tellurium, cerium and molybdenum supported on a microspheroidal silica carrier. It contains about 20-30wt./wt. percent of active elements and has has a bulk density. The catalyst is presently produced by in facilities near the acrylonitrile plant.
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第1个回答  2009-03-28
丙烯,氨和空气蒙特卡蒂尼爱迪生的高活性,低容重流体使丙烯腈催化剂在最低的成本

乔治加亚Caporali ,蒙特卡蒂尼爱迪生斯帕,米兰,意大利

由于约1960年,领先的路线已经由丙烯腈催化反应丙烯氨和空气。蒙特爱迪生的商业化进程是在1968年首次在其60000-ton/year植物。这一进程已被授权给Paular有限公司在西班牙的40000-ton/year植物和蒙特爱迪生是规划的另一个工厂自己100,00吨/年的能力。

虽然现代商业丙烯腈进程出现类似和生产非常纯的产品,每一个特点是其本身的原始特征:

催化体系和校长技术

自然条件和顺序恢复和净化步骤。

这些步骤和特点的蒙特卡蒂尼爱迪生的过程中显示图1数据和其他数据中可以找到的文献。

原材料。只有三个反应,氧气供应空气,也没有流repuired作为稀释剂。工业级丙二醇( 92-93点,平衡丙烷)和无水氨肥级是令人满意的。高级烯烃是不可取的,因为他们的负担,使副产品的净化步骤。有气态的反应是预混和美联储的底部反应堆。

反应堆。大型流化床催化反应器的使用提供了:

自下而上分布板支持催化剂和散发的气体;

一名高级设置多种效果旋风,与浸脚,追回和返还的催化剂,底部附近的反应区;

特别套热交换器在流化床反应余热排出和蒸汽发电。反应条件。典型的反应条件为: 420-460 。丙型; 2kg/cm2绝对压力;饲料成分从6.7-8第一卷。百分之丙烯,0.2 - 0 .6百分之丙烷,7.5 - 9percent氨,82.5 - 86percent航空(其中至少超过氨对丙烯约50percent计量过量空气) ;班轮气速为1至2英尺(每秒的基础上空反应堆,总入口气体量平均运行条件) ;和接触时间的顺序数第二,如2to六秒时气量是基于如前所述,在平均操作条件,并提到的体积便携催化剂。

催化剂的催化剂包括含氧化合物的碲,铈,钼支持在microspheroidal硅胶载体。它包含关于20-30wt./wt 。百分之积极分子,并已具有容重。该催化剂是目前生产的设施附近的丙烯腈装置。
第2个回答  2009-03-29
从丙烯,高效氨和空气的montecatini edison’s,低容积密度流动性催化剂给丙烯腈在最便宜
Giorgio Caporali, Montecatini爱迪生S.p.A,米兰,意大利
Since大约1960年,主导的路线到丙烯腈是由丙烯的催化反应与氨的,并且air。 Montedison’s过程在1968年首先商业化在他们的60,000-ton/year植物中。 这个过程被准许了对Paular CO.在40,000-ton/year植物的西班牙,并且montedison对他们自己计划另一棵植物以100,00吨或年容量。
Although现代商业丙烯腈过程似乎与相似并且生产非常纯净的产品,其中每一个描绘的是为它自己原始的特点:
Catalyst系统和神父技术
Nature、补救和洗净步情况和序列。
These步和特点在Montecatini爱迪生过程中在无花果.1显示,并且其他数据在文学也许被找到。
RAW材料。 因为空气和小河没有repuired作为稀释剂,只有三反应剂,被供应的氧气。 技术成绩丙烯(92-93%,是的平衡丙烷)和无水肥料等级氨是令人满意的。 更加高级的烯烃是不受欢迎的,因为他们做负担洗净步的副产物。 那里气体反应剂预先混合并且哺养对反应器的底部。
Reactors. 的大号流化床催化作用的反应器提供使用: 支持催化剂和分布的气体A底下发行板材;
A上面套多效旋风,与垂度腿,恢复并且退回催化剂临近反应区域的底部;
Special套热转换器在反应的流化床上加热撤除和蒸汽世代。
Reaction情况。 典型的反应情况价值是: 420-460。C; 2kg/cm2绝对压力; 范围从6.7-8卷百分之丙烯, 0.2-0.6percent丙烷, 7.5-9percent氨, 82.5-86percent的饲料成分给极小的剩余氨关于丙烯和关于50percent化学计量学的过量空气)的空气(; 划线员在1和2英尺之间的气体速度每秒(根据与总入口的空的反应器供气容量在平均操作条件); 并且联络时间按一些的顺序秒钟,即, 2to 6秒,当气体容量根据如上述时,在平均操作条件和提到了被包装的催化剂的容量。 催化剂包括和钼支持Catalyst一个microspheroidal硅土载体被氧化的化合物碲、铈。 它包含关于活跃元素的20-30wt。/wt.百分之并且有有容积密度。 催化剂在丙烯腈植物附近的设施目前被生产。
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