Decontamination
Our offering: Activated Alumina Adsorbents
We offer activated alumina adsorbents for initial discoloration and ash removal in plastics recycling feeds. The granular and spherical alumina adsorbents have a high mechanical strength combined with high surface area and engineered pore structure that provide a unique set of properties needed for initial decontamination and color removal.
Prehydrogenation
Our offering: PuriCycle® SH
Plastics pyrolysis feeds generated by thermal non catalytic or catalytic pyrolysis processes normally contain high amounts of unsaturated compounds, often up to 50-60 wt % of olefins and up to 4-5 wt % of diolefins depending on the specificity of the process. While olefin saturation can be completed downstream in a hydroprocessing unit, heating up streams containing high levels of polyunsaturates i.e. diolefins is a challenge as these compounds tend to oligomerize and condense into waxes contributing to coking of heat exchangers. At certain elevated levels diolefins pose a problem for transportation of pyrolysis liquids making them less stable. BASF offers PuriCycle® SH products for selective prehydrogenation of plastics pyrolysis feeds to remove polyunsaturated compounds enabling transportation and/or downstream processing.
Dehalogenation
Our offering: PuriCycle® H
Halogens and more specifically chlorides are often present in waste plastics pyrolysis streams. The levels vary greatly depending on the types of plastics used, preprocessing configuration and overall process design. Removal of halogens is important to protect downstream equipment. BASF offers PuriCycle® H in a nonregenerable service, an adsorbent which efficiently and selectively binds halogens ensuring the highest purity of the product stream.
Hydroprocessing
Our offering: PuriCycle® HP
Immense diversity among compositions of plastics pyrolysis liquids result in a wide spectrum of related impurities. Most plastics pyrolysis feeds are rich in unsaturated compounds, aromatics and often include -N, -O, and -S compounds as well as traces of metals such as Si, Hg and others. Depending on the downstream use of these streams there are different purity and compositional requirements. Feeding steam crackers, which is widely seen as the most feasible route to close the plastics loop, requires plastics derived feeds that satisfy stringent purity specs. Hydroprocessing is often viewed as the preferred universal process solution to hydrogenate unsaturated compounds and simultaneously remove heteroatoms such as -N, -O, and -S. BASF offers a range of PuriCycle® HP products as efficient hydroprocessing catalysts optimized for high performance in plastics pyrolysis liquids.
