Pt/Pd sodalite caged catalyst combination with sulfided base metal catalyst for the improved catalytic hydroprocessing of feedstock

Patent metadata

Field	Value
Publication number	US-10351781-B2
Application number	US-201615296301-A
Country	US
Kind code	B2
Filing date	Oct 18, 2016
Priority date	Dec 14, 2015
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

A novel pt/pd sodalite caged catalyst combination with sulfided base metal catalyst for improved catalytic hydroprocessing of renewable feedstock. Particularly, the invention relates to a process for preparation of the said catalyst. More particularly, the invention relates to a process for the preparation of hydrocarbon fuel from the feed stock using a said catalyst. Further, the invention discloses a novel catalyst and a process for the preparation of the Pt/Pd encapsulated in sodalite cage with silica-alumina ZSM-5 synthesized around it supported with nickel, molybdenum, cobalt, tungsten or one or more thereof. The invention also provides process to convert vegetable oils, free fatty acids, and microbial lipids, bio-crude and conventional non-renewable crude based feed stocks such as diesel, naphtha, kerosene, gas oil, residue, etc., into gasoline, aviation, diesel, fuel and other hydrocarbons fuel with reduced coke formation and hydrogen generation due to formation of napthenes and aromatics using the novel catalyst.

First claim

We claim:

1. A multifunctional catalyst comprising at least one noble metal further defined as platinum or palladium or both incorporated in a sodalite cage and mesoporous ZSM-5 or mesoporous SiO 2 —Al 2 O 3 or a combination thereof as a shell, wherein the shell is impregnated with at least one sulfidated base metal.

2. The multifunctional catalyst as claimed in claim 1 , wherein the shell comprises mesoporous ZSM-5.

3. The multifunctional catalyst as claimed in claim 1 , wherein the base metal is selected from the group consisting of nickel, molybdenum, cobalt, tungsten or mixture thereof.

4. A process for preparation of a multifunctional catalyst of claim 1 comprising:
a) preparing a solution of NaAlO 2 and NaOH in demineralized water;
b) mixing the solution of step a) with fumed SiO 2 to obtain a gel;
c) preparing a solution of [Pt(NH 3 ) 4 ]NO 3 or [Pd(NH 3 ) 4 ]NO 3 or both in water;
d) charging drop wise the solution obtained step c) to the gel obtained in step b) to obtain a gel mixture;
e) transferring the gel mixture of step d) to a sealed contained and homogenized by vigorous stirring to obtain a gel;
f) the gel obtained in step e) is stirred at 353-393K;
g) filtering and washing with water until filtrate is neutral to obtain catalyst;
h) reducing the catalyst at 573-873K in hydrogen atmosphere to obtain a sodalite cage comprising platinum or palladium or both;
i) preparing a solution of NaAlO 2 in distilled water to obtain a solution;
j) mixing the solution obtained in step i) with TBAOH and stirring for 2-4 hours;
k) keeping the solution static for 24 hours to obtain a solution;
l) preparing a solution of ODAC in water absolute ethanol mixture to get a clear solution;
m) preparing a solution of catalyst obtained in step h) in water:ethanol mixture and sonicating to obtain a clear solution;
n) mixing the solutions of step l) and solution of step m) to the solution of step k);
o) stirring the entire solution at a temperature of 303-363K for 24-30 hours and autoclaving the mixture at 400-453K for 36 hours;
p) filtering and washing to get the catalyst and calcined at 623-923K to get the new material;
q) ion exchanging the material synthesized in step p) with ammonia solution for at 60-90° C. to obtain ion exchanged material;
r) using a wet impregnation method to impregnate the at least one base metal on the ion exchanged material of step q),
s) sulfidating the at least one base metal of the impregnated material of step r) to obtain the catalyst of claim 1 .

5. The process as claimed in claim 4 , wherein the base metal is selected from the group consisting of nickel, molybdenum, cobalt, tungsten or mixture thereof.

6. A process for the preparation of hydrocarbon fuel from feed stock using a catalyst as claimed in claim 1 comprising the steps of:
a) suspending the sulfidated base metal containing multifunctional catalyst of claim 1 in a fixed bed reactor;
b) maintaining the reactor at 300-480° C. and 50-150 bar pressure;
c) charging the feed stock and H 2 gas; and
e) simultaneous distillation of product to obtain different fractions.

7. The process as claimed in claim 6 , wherein the base metal is selected from the group consisting of nickel, molybdenum, cobalt, tungsten or mixture thereof.

8. The catalyst as claimed in claim 1 , wherein the noble metal is one of platinum or palladium.

9. The process as claimed in claim 6 , wherein the feedstock is selected from vegetable oil, free fatty acids, microbial lipids, bio crude, nonrenewable crude.

10. The process as claimed in claim 6 , wherein the noble metal is palladium or platinum.

Assignees

• Council Scient Ind Res

Inventors

• Sinha Anil Kumar
• Anand Mohit
• Farooqui Saleem Akthar
• Kumar Rakesh
• Joshi Rakesh Kumar
• Kumar Rohit
• Khan Tasleem
• Alam Parvez
• Malayil Gopalan Sibi

Classifications

• C10G2300/1018

  of animal origin · CPC title

• B01J29/74

  Noble metals · CPC title

• B01J35/002

  Operations & Transport · mapped topic

• B01J29/46

  Iron group metals or copper · CPC title

• B01J29/045

  containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium · CPC title