Petrochemical Technology

GTC’s petrochemical technologies focus on high growth areas of olefins, plant by-product upgrading and the chain of polyester intermediates. Our broad portfolio of products and extensive experience enables clients to seamlessly integrate our processes across business lines. Listed below is an overview of our petrochemical technologies offered.

Aromatics Recovery – GT-BTX Select®

GT-BTX Select is GTC’s aromatics recovery technology that uses extractive distillation to remove benzene, toluene, and xylene (BTX) from refinery or petrochemical aromatics streams such as catalytic reformate or pyrolysis gasoline. With lower capital and operating costs, simplicity of operation, and range of feedstock and solvent performance, extractive distillation is superior to conventional liquid-liquid extraction processes. Flexibility of design allows use for grassroots aromatics recovery units, debottlenecking or expansion of conventional extraction systems.

Styrene Recovery-GT-Styrene®

GT-Styrene® is ourextractive distillation (ED) process that directly recovers styrene from the raw pyrolysis gasoline derived from the steam cracking of naphtha, gasoils and natural gas liquids (NGLs). The produced styrene is high purity and suitable for all polymerization. If desired, the mixed xylenes can also be extracted from the pygas, upgrading their value as a chemical feedstock. The process is cost effective for pygas feeds containing more than 15,000 tpy styrene.

Selective Toluene Disproportionation Conversion – GT-STDP℠

GT-STDP, our selective toluene conversion process technology, produces benzene and para-enriched xylenes from toluene disproportionation. The technology features a proprietary catalyst with high activity and selectivity towards paraxylene.

Paraxylene Recovery – CrystPX℠

CrystPX℠ is GTC’s modern suspension crystallization technology for production of paraxylene (PX). The process can be applied in a single-stage for concentrated PX feedstock or in two stages for equilibrium xylenes feed. The technology has fewer pieces of equipment, simplified flow schemes, and a more reliable operation compared to traditional crystallization methods.

Xylene Isomerization – GT-IsomPX℠

GT-IsomPX℠ is GTC’s xylene isomerization technology available in two versions: EB isomerization type and EB dealkylation type. Both versions gain high ethylbenzene (EB) conversion rates while producing equilibrium mixed xylenes. Catalysts that exhibit superior physical activity and stability are the key to this technology. The technology and catalysts are used commercially in several applications.

Transalkylation – GT-TransAlk℠

GT-TransAlk℠ is GTC’s transalkylation processthat produces benzene and xylenes from toluene and/or heavy aromatics streams. The technology features a proprietary catalyst and can accommodate varying ratios of feedstock while maintaining high activity and selectivity.

C5 Processing

GTC offers two technologies to recover DCPD and PIPS for making hydrocarbon resin and SIS/polymer grade isoprene. In addition, GTC, in cooperation with Neville Chemical Company, has formed Neville Venture, a joint venture company that produces high quality hydrocarbon resins (HCRs) through the creation of joint ventures with large naphtha-cracking ethylene producers.

Aromatization – GT-Aromatization℠

GT-Aromatization℠ is GTC’s aromatization technology that is used to convert light naphtha and mixed feeds to aromatics and gasolinetypically using C4 and C5 feedstock cuts from FCC gasoline as well as raffinate from the GT-BTX PluS process.