An olefin production method is provided involves a step of catalytically cracking a raw material containing at least a polyolefin and an organochlorine compound in the presence of a zeolite catalyst having a sodium atom content of less than 0.1% by mass. This method improves olefin yield.

A process for the production of a zeolite body includes the steps of: forming a zeolite reaction mix having zeolite crystallites and water; removing water from the zeolite reaction mix to form a partially dried zeolite mass; extruding and/or cutting/breaking the partially dried zeolite mass to form a partially dried zeolite body; subjecting the partially dried zeolite bodies to a further processing step selected from rounding, drying and size classification; heating the partially dried zeolite bodies to temperatures greater than 400 C. to form calcined zeolite bodies; contacting the calcined zeolite bodies with water to form washed calcined zeolite bodies; contacting the washed calcined zeolite bodies with an ammonium ion containing solution so as to exchange sodium ions in the zeolite with ammonium ions to form cation-exchanged zeolite bodies; and heating the cation-exchanged zeolite bodies to temperatures greater than 200 C. to form zeolite bodies.

The present invention relates in a first aspect to a catalytic composition comprising a catalytic mixture in a powdered state of a first catalyst having photo catalytic activity, a second catalyst being a low temperature catalyst and an adsorbent, whereby the catalytic composition comprises carbon nanotubes in an amount of at most 5 weight-% based on the amount of the catalytic mixture. Further, the present invention relates to a method for producing said catalytic composition according to the present invention. In addition, a catalytic device comprising the catalytic composition according to the present invention, optionally coated on a carrier is provided as well as a gas depolluting apparatus containing said catalytic composition according to the present invention or the catalytic device accordingly. Finally, the use of the catalytic composition or the catalytic device as well as the gas depollution apparatus is disclosed, in particular, for depollution of gases of volatile chemical contaminants as well as treatment of gas containing biological contaminants.

A novel process for making n-paraffin rich steam cracker feedstocks from pyrolysis oil derived from waste plastics. The process utilizes a hydrotreating section and a hydrocracking section. Some products can be sent to a steam cracker as feedstocks to make chemicals, while others can be recycled back into the system to improve target product yield. In one embodiment the liquid recycle is designed for better heat management. The system results in the conversion of pyrolysis oil derived from waste plastics into steam cracker feedstock.