METHODS OF PRODUCING SUBSTANCES diesel fractions having improved cold flow properties

摘要

1. A process for preparing substance diesel fraction having improved cold flow properties, which includes the steps of: providing (12) a paraffinic feedstock (15) of the diesel fraction; hydrotreatment (14) paraffinic feed diesel fraction at a temperature of 315 ° C less to obtain a flow (20 ) of the intermediate product containing a predetermined amount of oxygen organosoedineny that is from about 200 to about 2000 ppm by weight of oxygen in the liquid portion of the intermediate product stream of paraffinic feedstock d zelnoy fraction; ikontaktirovaniya (22) intermediate stream with a catalyst in the dewaxing process conditions under which oxygen organosoedineniya chemically interact with the dewaxing catalyst to convert a portion of n-paraffins in the intermediate product to isoparaffins, while reducing to a minimum cracking diesel fraktsii.2 substance. A method according to Claim. 1, wherein the providing step (12) paraffinic feedstock (15) of the diesel fraction comprises feeding a paraffinic feedstock diesel fraction comprising n-paraffins and oxygenates organosoedineniya, and wherein the step of hydrotreating the paraffinic feedstock diesel fraction comprises removing a portion of the oxygenate organosoedineny of paraffin raw diesel fraction, while maintaining it in a predetermined amount of oxygen organosoedineniy.3. A method according to claim. 2, which contains at least 400 parts per million by weight of carboxylic kislot.4. A method according to claim. 2, wherein the step of feeding a paraffinic feedstock (15) includes obtaining diesel fraction paraffinic feedstock diesel fraction of biovozobnovlyaemogo