Zeolite based catalyst composition for the reduction of olefins in FCC naphtha

Patent metadata

Field	Value
Publication number	US-9908109-B2
Application number	US-201514674467-A
Country	US
Kind code	B2
Filing date	Mar 31, 2015
Priority date	Mar 31, 2014
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

The present disclosure relates to a zeolite based catalyst composition comprising i. at least one rare earth metal, ii. at least one zeolite, and iii. optionally, at least one promoter; wherein, said rare earth metal is impregnated in said zeolite. The amount of said rare earth metal in said composition is in the range of 0.1 to 20 w/w %. The present disclosure also relates to a process for preparing a catalyst composition. Further, the present disclosure relates to a process for reducing olefin content in a hydrocarbon stream using the catalyst of the present disclosure.

First claim

The invention claimed is:

1. A process for reducing olefin content in a hydrocarbon stream said process comprising the following steps;
i. providing at least one hydrocarbon stream comprising olefins in an amount ranging from about 0.01 up to about 70 w/w %, and
ii. contacting said at least one hydrocarbon stream with the a catalyst composition comprising at least one rare earth metal in the range of from about 0.1 w/w % up to about 20 w/w % and at least one zeolite wherein a ratio of SiO 2 to Al 2 O 3 in said zeolite ranges from about 1:20 up to about 1:450, at a temperature of from about 350° C. up to about 450° C., and at a pressure of from about 1 bar up to about 20 bars in the presence of at least one carrier gas to obtain the hydrocarbon stream comprising at least 40 w/w % reduced olefin content.

2. The process as claimed in claim 1 , wherein the method step of contacting is carried out in a fixed bed reactor at a flow rate of said at least one hydrocarbon stream ranging from about 10 ml/h up to about 14 ml/h and a space velocity ranging from about 8 WHSV (weight hourly space velocity) up to about 10 WHSV.

3. The process as claimed in claim 1 , wherein the at least one hydrocarbon stream is at least one selected from the group consisting of gasoline, vacuum gas oil (VGO), light cycle oil (LCO), naphtha and C4 to C12 olefins and the at least one carrier gas is at least one selected from the group consisting of nitrogen and hydrogen.

4. The process as claimed in claim 1 , wherein said at least one rare earth metal is impregnated in said at least one zeolite.

5. The process as claimed in claim 1 , wherein the at least one rare earth metal is selected from the group consisting of scandium, yttrium, lanthanum, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium and said at least one rare earth metal is in a salt form selected from the group consisting of chloride, bromide, fluoride, iodide, sulfates, phosphates, phosphonates, nitrates, nitrites, carbonates, acetates, bicarbonates, hydroxides and oxides.

6. The process as claimed in claim 1 , wherein the at least one zeolite is selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-22, ZSM-23, ZSM-48, ZSM-57, SAPO-5, SAPO-11, SAPO-17, SAPO-18, SAPO-34, SAPO-44, ferrierite, mordenite, beta and zeolite Y.

7. The process as claimed in claim 1 further comprises at least one promoter selected from the group consisting of cerium, niobium, cesium, sodium, potassium, and rubidium in an amount ranging from 0.01 to 1.5 w/w %.

Assignees

• Hindustan Petroleum Corp Ltd

Inventors

• Ravishankar Raman
• Mehla Sunil
• Rao Peddy Venkata Chalapathi
• Choudary Nettem Venkateswarlu
• GANDHAM Sriganesh

Classifications

• B01J29/85

  Silicoaluminophosphates [SAPO compounds] · CPC title

• C10G57/00

  Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one cracking process or refining process and at least one other conversion process · CPC title

• B01J37/0009

  Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst · CPC title

• B01J37/04

  Mixing {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• B01J29/061

  containing metallic elements added to the zeolite · CPC title