Search Axens.net

C₄ Upgrading

Technical Article - Using Technology to Increase Middle Distillate Production

Technical Article - Tackling the Gasoline / Middle Distillate Imbalance

Technical Article - Technical Article - Gasoline and Diesel Imbalances in The Atlantic Basin Part 2

Technical Article - Gasoline and Diesel Imbalances in The Atlantic Basin Part 1: Market Outlook

Commercial Bulletin - Polynaphtha™ & Selectopol™

Commercial Bulletin - Polynaphtha™ & Selectopol™

Conference
San Francisco - UTC-7
3 days
Speakers
David Schwalje
Emerging Market Development Axens Americas
Learn more

ABLC 2021

Advanced Bioeconomy Leadership Conference (ABLC) is a connected series of 6 conferences and 16 events in total on the most important issues in the Bioeconomy right now. The topic of the conferences ranges from advanced biofuels, renewable chemicals, advanced agriculture, advanced nutrition, sustainable aviation fuels, and advanced biogas.
Learn more
Conference
New Orleans - GMT-5
2 days
Learn more

American Fuel & Petrochemical Manufacturers (AFPM) Summit

The Summit: Excellence in Plant Performance blends AFPM’s traditional refining and petrochemical manufacturing technical curriculum with new creative opportunities that drive excellence in plant performance. Topics and themes throughout the conference will highlight emerging process technologies, process safety, improved reliability and operations, mechanical integrity, training, leadership, and culture.
Petrochemicals
Renewable Fuels & Bio-Based Chemicals
Aromatics Extraction
Extractive Distillation
Liquid Liquid Extraction (LLE)
Benzene Hydrogenation
Benzene Production
Bio Aromatics
Bio Olefins
Bio Ethylene
Bio Butadiene
C₄ Fractionation
Butene-1 recovery
Isobutene Recovery
C₄ Isomerization / Alkylation / Olefins Hydrogenation
C₄ Isomerization
Fluoridric Acid Alkylation
Sulfuric Acid Alkylation
Feed Purification
Solvent hydrogenation
C₄ Upgrading
C₅ Skeletal Isomerization
C₅-C₆ Isomerization
Once-through
Octane Enhancement
Advanced Recycle
Catalytic Cracking
VGO FCC
Resid FCC
High Propylene FCC
Catalytic Reforming
CCR Reforming
Cyclic Reforming
Semi-reg Reforming
Catalytic Reforming
CDU (Crude Distillation Unit)
Cellulosic Ethanol
CO₂ Capture
CO₂ Gas Drying
Cyclohexane Production
Diesel Hydrotreating
EDC Cracking
Etherification
FCC Naphtha Hydrotreating
FCC Naphtha Sweetening
Gas Dehydration & Purification
Solvent Processes
Dew Pointing
Adsorbents
Gas Sweetening
Solvent Based Processes
Cryogenic Processes
Catalytic Processes
Adsorbents
High-conversion Hydrocracking
Kerosene Sweetening / Hydrotreating
Sweetening
Hydrotreating
LNG
LPG Sweetening & Olefins Recovery
LPG Sweetening
Olefins Recovery
Lube Plant
Hydrorefining
Lubes Hydrofinishing
Hydroisomerization & Hydrofinishing
White oils Hydrotreating
Wax Hydrotreating
MEG Recovery
Naphtha Treatment
NGL & Condensates Sweetening
NGL Recovery & Treatment
Olefins Purification
Phenol Production
Oligomerization
Olefins Purification
Ethylene Purification
Comonomer Purification
Propylene Purification
Olefins Removal
Olefins Selective Hydrogenation
C₂ Selective Hydrogenation
C₃, C₄, C₅ Selective Hydrogenation
C₅+ Pygas Hydrogenation
Oligomerization
Heterogeneous Oligomerization
Homogeneous Oligomerization
Oligomerization
Ethylene
Butene
Paraxylene Purification & Production
Phenol Production
Renewable Diesel and Jet
Americas
+93
Learn more

Selectopol™

The Selectopol™ process is a variant of the Polynaphtha™ process using the same catalyst but at lower severity:

  • To convert selectively the isobutene portion of an olefinic C4 fraction to high octane, low RVP gasoline blending stock,
  • or to enrich Trimethyl Pentene stream for petrochemical applications.

Selectopol™ technology is an alternative scheme to avoid or reduce MTBE production in C4 complex.

Enriched n-butenes raffinate of Selectopol™ is ideally sent to Alkylation, Methyl Ethyl Ketone (MEK), Metathesis or Dimersol-X™ process unit, without any pretreatment.

Low cost means of retrofitting existing MTBE units or debottlenecking existing alkylation units
Almost complete isobutene conversion while preserving N-butenes
20 Selectopol™ and Polynaphtha™ units have been licensed by Axens
Polynaphtha

Polynaphtha™

In the Polynaphtha™ process, propylene and/or mixed butenes are oligomerized catalytically in a series of fixed bed reactors. Conversion and selectivity are controlled by reactor temperature adjustment while the heat of reaction is removed by feed effluent heat exchange and intermediate reactor cooling. The reactor section effluent is fractionated producing LPG raffinate, gasoline and middle distillate fractions such as kerosene or diesel.

The Polynaphtha™ technology is well suited for revamping existing phosphoric acid polymerization units.

Low investment
Low utilities consumption
22 Selectopol™ and Polynaphtha™ units have been licensed by Axens
Polynaphtha
Subscribe to C₄ Upgrading