PROCESS FOR SEPARATING AND DRYING PYROLYSIS PRODUCTS Russian patent published in 2006 - IPC B01D53/28 B01J20/34 

FIELD: petroleum processing and petrochemistry.

SUBSTANCE: process comprises multistep compression of hydrocarbon feedstock pyrolysis gas, separation of water and liquid pyrolysis products, purification and drying of pyrolysis products, sorption drying of liquefied pyrolysis products formed in final pyrolysis, and multistep rectification. Sorption drying of liquefied pyrolysis products is carried out on porous solid sorbent comprising anhydrous calcium chloride, in particular 15-30% CaCl₂, 70-85% Al₂O₃ or 15-30% CaCl₂, 50-70% Al₂O₃, 15-20% SiO₂, having loose density at least 0.6 g/cm³ and pore volume at least 0.5 cm³/g at temperature not higher than 40°C and excess pressure 1.9-4.0 MPa. Regeneration of sorbent is effected in flowing gas atmosphere containing at least 80 vol % methane, while cramping temperature to 150°C.

EFFECT: increased economical efficiency of separation allowing longer drying phases and enabling regeneration under milder conditions.

1 dwg, 3 ex