Composition and process for preparation of attrition resistant additive suitable for cracking hydrocarbon feed

Patent metadata

Field	Value
Publication number	US-10245581-B2
Application number	US-201615233485-A
Country	US
Kind code	B2
Filing date	Aug 10, 2016
Priority date	Nov 30, 2015
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

The present invention relates to attrition resistant hydrocarbon cracking catalyst additive composition comprising aluminum phosphate binder for cracking of hydrocarbon molecules to produce light olefins and process of preparation thereof. The present invention further relates to the process of preparation of the aluminum phosphate binder wherein said binder is incorporated into the ZSM-5 additive composition to enhance its attrition resistance property as well as enhance selectivity and activity of additive composition for production of light olefins such as liquefied petroleum gas (LPG).

First claim

We claim:

1. An attrition resistant hydrocarbon cracking catalyst additive composition comprising an aluminium phosphate binder, wherein said aluminium phosphate binder has zeta potential in the range of −40 mv to −60 mv in liquid form and a surface area in the range of 80-200 m 2 /gm in dry form;
wherein said additive composition comprises:
a) 10-70 wt % ZSM-5 zeolite;
b) 5-12 wt % of the aluminium phosphate binder;
c) 5-20 wt % colloidal silica;
d) 10-60 wt % clay; and
e) 1-12 wt % phosphate.

2. The composition as claimed in claim 1 , wherein said additive has Attrition Index (ASTM D5757) below 5 and ABD above 0.75 g/cm 3 .

3. The composition as claimed in claim 1 , wherein said aluminium phosphate binder is prepared by reacting an aluminium compound with an acidic phosphate compound and at least one basic phosphate compound.

4. The composition as claimed in claim 3 , wherein the aluminium compound is selected from the group comprising of aluminium nitrate, aluminium chloride, aluminium sulfate and aluminium acetate.

5. The composition as claimed in claim 3 , wherein the acidic phosphate compound is phosphoric acid and said basic phosphate compound is selected from di-ammonium hydrogen phosphate, mono-ammonium di-hydrogen phosphate or mixture thereof.

Assignees

• Indian Oil Corp Ltd

Inventors

• Sarkar Biswanath
• Karthikeyani Arumugam Velayutham
• Kuvettu Mohan Prabhu
• Kadgaonkar Mahesh
• Chidambaram Velusamy
• Swamy Balaiah
• Kumar Brijesh
• Das Biswapriya

Classifications

• B01J2229/42

  Addition of matrix or binder particles · CPC title

• B01J2229/20

  to introduce other elements in the catalyst composition comprising the molecular sieve, but not specially in or on the molecular sieve itself · CPC title

• B01J37/28

  Phosphorising · CPC title

• B01J37/04

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

• B01J29/40 Primary

  of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively · CPC title