MOLDED THREE-LEAFED STRUCTURES, PROTECTIVE LAYER, METHOD OF REDUCING CONTAMINATION IN CATALYST BEDS, METHOD OF CONVERTING ORGANIC FEEDSTOCK, AND A METHOD FOR OBTAINING MIDDLE DISTILLATES FROM SYNTHESIS GAS Russian patent published in 2007 - IPC B01J35/02 B01J35/10 C10G47/12 

FIELD: petrochemical process catalysts.

SUBSTANCE: invention relates to molded particles having particular shapes. They can be used to prevent or considerably reduce contamination in catalyst beds operated in flows carrying contaminating materials, which results in loss of pressure within a bed. Oblong molded particles for catalysts and granulometric compositions contain three raised portions, each extending from central segment aligned from central longitudinal axis of particle and attached to central segment, while cross section of particle occupies area surrounded by outer frontiers of six circles surrounding central circle minus area of three alternate outer circles. Each of six outer circles has diameter ranging from 0.74 to 1.3 diameters of central circle and touches two neighboring outer circles, while three alternate outer circles are situated at equal distance from the central circle, have the same diameter, and are essentially in contact with central circle. These are the particles that are contained in protective layer. Method of reducing contamination or effect of contaminating precipitation in catalyst beds comprises contacting feedstock containing contaminating material with one or several layers of above-described particles. Disclosed are also method of converting organic feedstock, method for obtaining middle distillates from synthesis gas, and a method of converting hydrocarbons in particular of described particles.

EFFECT: considerably reduced catalyst-poisoning effect of contaminating materials contained in feedstock.

15 cl, 1 dwg, 1 tbl