High Propylene FCC

Olicrack™

Olicrack™ is a process to bridge the petrochemical-refinery gap to convert unwanted or lower valued olefins into propylene and ethylene. The process combines olefin Oligomerization and cracking in a single reactor using a selective zeolite catalyst and continuous catalyst regeneration system.

The purpose of the Olicrack™ unit is to produce a high quantity of propylene, through oligomerization and cracking of primarily C₄ to C₆ olefin-rich feeds, using a zeolite-based catalyst. The aim of the Olicrack™ process is to improve low value feedstocks such as off-gas, LPG purges or light ends through the production of propylene and, to some extent, ethylene.

HS-FCC™

An alliance involving Saudi Aramco, ENEOS, King Fahd University of Petroleum and Minerals, Technip Stone & Webster Process Technology and Axens Solutions has led to the development of the HS-FCC™ process which is able to produce up to 25 wt% propylene by converting heavy hydrocarbon feedstock under severe FCC conditions.

The main features of the HS-FCC™ process are:

• A down-flow reactor
• High reaction temperature
• Short contact time
• High catalyst to oil ratio (C/O)

The HS-FCC™ process operates at high temperature and high C/O ratio but with a short contact time in order to promote catalytic cracking, enhancing thus the yield of propylene.

FlexEne™

Axens has developed the new FlexEne™ technology to expand the capabilities of the FCC process which is the main refinery conversion unit traditionally oriented to maximize gasoline and at times propylene production.

FlexEne™ is an innovative combination of two well-proven technologies: Fluidized Catalytic Cracking (FCC) and Oligomerization (Polynaphtha™). Combined in an innovative way, they can significantly improve product flexibility to control the balance of propylene, gasoline and diesel production with a low capital investment. This FLEXibility is achieved by selective oligomerization of light FCC alkENEs (olefins) for recycle cracking in the FCC.

By adjusting the catalyst formulation and operating conditions, the FCC process is able to operate in different modes: Maxi Distillate, Maxi Gasoline and High Propylene. This provides the product flexibility required by the market.

R2P™ (Resid to Propylene)

Axens has developed Resid to Propylene (R2P™) for residue feeds to produce 8-13 wt% propylene. When the process objective is maximum propylene production, specific technology features must be added to the FCC/RFCC unit. The challenge is particularly great when the feedstock contains residue.

Depending on the quality of the feed and the propylene and other product targets, Axens can develop customized solutions for:

• Maximum LPG and Gasoline or "High Propylene"
• Maximum Propylene

High Propylene FCC

Axens has developed High Propylene FCC (HP FCC™) for traditional distillate feeds to produce 10-15wt% propylene. Depending on the quality of the feed and the propylene and other product targets, Axens can develop customized solutions for:

• Maximum LPG and Gasoline or "High Propylene"
• Maximum Propylene
• Maximum Distillate & LPG

CO Combustor and Waste Heat Boiler for Catalytic Cracking

CO Combustor and Waste Heat Boiler are key equipment considering the need for optimal operation of unit. Thanks to an extensive design experience with feedbacks from operators and a complete knowledge of this process, Heurtey Petrochem Solutions provides an unparalleled service such as these following features:

• Lowest Emission (95%+ reduction with emission reduction technology) including Carbon Monoxide (CO)
• Fully Modularized
• Maximum Steam Production / Superheat Level
• Off-line (no REGEN GAS) Steam Production
• Optimum Cleaning of Heat Transfer Surface
• Optimized Plot Plan