QUENCHING DEWAXING REACTOR WITH HEAVY DEWAXATE RECYCLE

摘要

During catalytic dewaxing of paraffinic hydrocarbons, the exothermic catalytic dewaxing reaction is moderated by separating and cooling a heavy dewaxate having an initial boiling point of at least 800 °F+, and recycling it back into the dewaxing zone as quench liquid. The heavy dewaxate reacts very little, if at all, with the hydrogen in the dewaxing zone. This has been found to be particularly useful for dewaxing hydroisomerized, paraffinic Fischer-Tropsch synthesized, hydrocarbons.