US 11,654,420 B2Granted

Process and catalyst for low temperature non-oxidative dehydrogenation of propane to propylene

AssigneeCouncil of Scientific and Industrial Research

InventorsBipul Sarkar, Ankit Agrawal, Om Vir Singh, Indrajit Kumar Ghosh, Shailendra Tripathi, Sanat Kumar, Anjan Ray

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Abstract

A process and catalyst are provided for the non-oxidative dehydrogenation of propane for the production of propylene as petrochemical building blocks. The process provides a direct single-step gas-phase dehydration of propane mixed with nitrogen in the presence and absence of steam/hydrogen over supported bimetallic alumina-silicates zeolites. The catalyst contains no precious metal entities and may contain one metal from group VIB in combination with another metal from group IIIA or IVA supported on FAU, MFI, KFI, BEA type alumina-silicates zeolites. The process provides a propane conversion of 18% to 52% with a propylene yield of 10% to 25%.

Claims18

Dependent claims

A catalyst composition comprising:

(a) a porous alumina-silicate zeolite selected from the group consisting of Faujasite (FAU), Zeolite Mobil type Five (MFI), Zeolite Kerr Five (KFI) and Zeolite Beta polymorph A (BEA) as catalyst support;
(b) a first metal selected from transition metals of group VIB, wherein the amount of the first metal is from 1 wt % to 10 wt % based on the porous alumina-silicate zeolite;
(c) a second metal selected from metals of group IIIA or IVA, wherein the amount of the second metal is from 1 wt % to 8 wt % based on the porous alumina-silicate zeolite;
and
(d) an alkali metal, wherein the amount of alkali metal is from 0.5 wt % to 2 wt % based on the porous alumina-silicate zeolite,
wherein the catalyst composition is free of noble metal.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/365,504Filed 1 Jul 2021
Priority: IN 2020110283443 Jul 2020
Published: US 2022/0001359 A16 Jan 2022
Granted: 23 May 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification23 codes

B01J 23/28
Chromium, molybdenum or tungsten: molybdenum
C07C 5/333
Formation of non-aromatic carbon-to-carbon double bonds only: catalytic processes
B01J 29/16
Of the faujasite type, e.g. type X or Y: containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum,…
B01J 29/48
Of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively:…