摘要:
A process for preparing an ethylene-rich composition from a C3-5 paraffinic feedstock is described. The C3-5 paraffinic feedstock is subjected to molecular redistribution via dehydrogenation to form olefins, metathesis of the olefins, and rehydrogenation of the olefins to form paraffins. The product stream includes ethane, which is isolated and sent to an ethane or ethane/propane cracker (or, alternatively, a flexi-cracker, although this is less cost effective) to yield an ethylene-rich composition. The product stream also includes C3-5 paraffins, which can be recycled, and C6+paraffins, which can be used, for example, as solvents. Alternatively, they can be isomerized to form gasoline additives, or can be converted to aromatic compounds by subjecting them to reforming conditions, for example using the AROMAX(TM) process or platforming or rheniforming conditions.
摘要:
PROBLEM TO BE SOLVED: To provide a catalyst increasing an effective area of a crystal surface part of the catalyst and enhancing collapse strength of a granulation article of the catalyst without using a bonding agent. SOLUTION: The granulation article of the catalyst is obtained by drying a slurry containing a catalyst powder obtained by finely dividing a metallosilicate-containing material by a bead mill by a spray drying method. The material is the one containing metallosilicate substantially having a fine hole having a diameter of 4.5-6.5 Å. The material may be finely divided such that an accumulation degree of a particle diameter of metallosilicate is 50% and becomes 1.0 μm or less. The metallosilicate may be carried with at least one or more selected from rhenium, vanadium, molybdenum, tungsten, chromium and its compound as a metal component. The slurry may be applied to the drying process after aging. Polyvinyl alcohol may be added to the slurry. COPYRIGHT: (C)2010,JPO&INPIT
摘要:
A process for preparing an ethylene-rich composition from a C3-5 paraffinic feedstock is described. The C3-5 paraffinic feedstock is subjected to molecular redistribution via dehydrogenation to form olefins, metathesis of the olefins, and rehydrogenation of the olefins to form paraffins. The product stream includes ethane, which is isolated and sent to an ethane or ethane/propane cracker (or, alternatively, a flexi-cracker, although this is less cost effective) to yield an ethylene-rich composition. The product stream also includes C3-5 paraffins, which can be recycled, and C6+paraffins, which can be used, for example, as solvents. Alternatively, they can be isomerized to form gasoline additives, or can be converted to aromatic compounds by subjecting them to reforming conditions, for example using the AROMAX(TM) process or platforming or rheniforming conditions.