US 11,851,385 B2
Process for producing dienes
Talisa Cerasoli, Novara (IT); Stefano Ramello, Novara (IT); and Monica Vittoria Pastori, Novara (IT)
Assigned to VERSALIS S.P.A., San Donato Milanese (IT)
Appl. No. 17/787,754
Filed by VERSALIS S.P.A., San Donato Milanese (IT)
PCT Filed Dec. 18, 2020, PCT No. PCT/IB2020/062177
§ 371(c)(1), (2) Date Jun. 21, 2022,
PCT Pub. No. WO2021/124242, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 102019000025000 (IT), filed on Dec. 20, 2019.
Prior Publication US 2023/0085074 A1, Mar. 16, 2023
Int. Cl. C07C 1/24 (2006.01)
CPC C07C 1/24 (2013.01) [C07C 2521/04 (2013.01); C07C 2521/08 (2013.01)] 20 Claims
 
1. A process for producing a diene, comprising dehydrating at least one alkenol in the presence of at least one catalytic material comprising at least one acid catalyst based on silica (SiO2) and alumina (Al2O3), said catalyst having an alumina content (Al2O3) lower than or equal to 12% by weight, with respect to the catalyst total weight, said alumina content being referred to the catalyst total weight without binder, and a pore modal diameter between 9 nm and 170 nm.