Linear alpha olefins (LAOs) are single, unsaturated hydrocarbons ranging between four and more than 20 carbon atoms in length. The short-chain LAOs are mainly used as comonomers for the production of polyethylene and polypropylene. Adding LAOs to the polymers increases flexibility and strength in the end product. 1-butene and 1-hexene are the most commonly used co-monomers for polymer production, however, 1-octene and 1-pentene are also used by polymer producers.
The medium and longer chain length LAOs are used in the production of synthetic lubricants and detergents. Long chain LAOs can be used as lubricants or drilling liquids. They are either produced by the oligomerization of ethylene or by separating them from Coal to Liquid (CtL) product streams. Linde Engineering has solutions that fit both processes.
The a-SABLIN® process was developed by Linde Engineering and Saudi-based Sabic. It harnesses the catalytic oligomerization of ethylene to produce a mix of alpha olefins. These alpha olefins can then be used for a wide range of applications, for example as co-monomers or precursors to tensides, lubricants, and other specialty/performance chemicals. The moderate pressure level of the a-SABLIN® Fischer Tropschprocess and the high selectivity and productivity of the catalyst are advantageous compared to other technologies.
Recovering linear alpha olefins (LAOs)
LAOs are produced by the oligomerization of ethylene and can also be Fischer-Tropsch synthesis products using a proprietary separation scheme. This option is beneficial for recovering LAOs in the C5 to C8 range and can be used to produce 1-pentene, 1-hexene, 1-heptene and 1-octene.
Acetylene recovery technology
The basic arrangement of the Linde process for the recovery of high purity acetylene includes three major steps as shown in this process sketch:
The unit is located upstream of the C2 splitter, processing the combined C2 stream, containing all acetylene, ethylene and ethane. The process can be applied and has been used in the full pressure range (8 to 20 bar) typical for C2 splitters.
Linde Engineering has the skills and experience to execute highly complex processes and mega projects, delivering stand-alone plants and units integrated into petrochemical complexes. Customers rely on us to execute a wide range of special projects with a high degree of complexity and technology.
Linde Engineering can deliver production facilities for aromatics and petrochemicals while seamlessly integrating them into cracker facilities. This integration increases both overall yield and cost effectiveness of the production of such chemical intermediates.
- Dealkylation of Toluene & Xylenes
- Ehtylene oxide
- Acrylic acid
Building production plants that do this is a complex task that involves a range of issues such as reactive products and special construction materials. Linde Engineering has a wealth of experience in the construction of these kinds of petrochemical plants, combining both the technology know-how and EPC expertise to seamlessly execute complex petrochemical projects.