Hydrocarbon conversion catalyst composition

Patent metadata

Field	Value
Publication number	US-10766022-B2
Application number	US-201916561914-A
Country	US
Kind code	B2
Filing date	Sep 5, 2019
Priority date	Oct 25, 2010
Publication date	Sep 8, 2020
Grant date	Sep 8, 2020

Abstract

A hydrocarbon conversion catalyst composition which comprises dealuminated ZSM-48 and/or EU-2 zeolite and a refractory oxide binder essentially free of alumina, processes for preparing such composition and processes for converting hydrocarbon feedstock with the help of such compositions.

First claim

That which is claimed is:

1. A catalytic dewaxing process for reducing the pour point of a wax-containing feedstock, said catalytic dewaxing process comprises:
contacting under dewaxing conditions said wax-containing feedstock, having a 10% distillation point at 200° C. as measured by ASTM D-2887-93, with a dewaxing catalyst composition, wherein said dewaxing conditions include a contacting temperature in the range of from 250 to 400° C., a contacting pressure in the range of from 5×10 5 to 200×10 5 Pa, and a liquid hourly space velocity in the range of from 0.1 to 10 hr −1 , and thereby providing a reduction of the pour point of said wax-containing feedstock by at least 10° C.;
wherein said dewaxing catalyst comprises a dealuminated dried and calcined extrudate, wherein said extrudate, before drying and calcination, comprises a binder that is essentially free of alumina and which comprises both a silica powder, wherein said silica powder comprises powder particles having a mean diameter between 10 μm and 200 μm, and a silica sol; EU-2 zeolite, wherein said EU-2 zeolite has a silica-to-alumina molar bulk ratio before the dealumination of said dried and calcined extrudate in the range of from 100 to 210; a plasticising agent; and water in an amount of at least 35% and not exceeding 60% by weight of the extrudate before drying and calcination; and
a catalytic metal selected from the group consisting of platinum, palladium and nickel;
wherein the dealumination of said dried and calcined extrudate is done by contacting said dried and calcined extrudate with an aqueous solution of fluorosilicate salt having a concentration of at least 0.005 mole of fluorosilicate salt/liter and at most 0.5 mole of fluorosilicate salt/liter and at a temperature in the range of from 10° C. to 120° C., and
wherein the amount of said EU-2 zeolite present in said catalyst composition is at least 15% wt. of said catalyst composition; and
wherein the EU-2 zeolite is in the form of EU-2 zeolite particles, where the average aluminum concentration of the EU-2 zeolite particles is at least two times the aluminum concentration at the surface of the particles.

2. The process as recited in claim 1 , wherein the EU-2 zeolite content in said catalyst composition, on a dry basis, is in the range of from 20 to 70 wt. % as calculated on the total weight of said catalyst composition.

3. The process as recited in claim 2 , wherein said fluorosilicate salt of said fluorosilicate salt solution is represented by the formula:
( A )2/ b SiF6

wherein ‘A’ is a metallic or non-metallic cation other than H+ having the valence ‘b’.

4. The process as recited in claim 3 , wherein the plasticizing agent is selected from the group consisting of dextrose, gelatin, glucose, glues, gums, salts, waxes, starch and cellulose ethers.

5. The process as recited in claim 4 , wherein said binder contains at most 2% wt. alumina, based on dry weight of the binder.

6. The process as recited in claim 5 , wherein said binder contains at most 1.1% wt. alumina, based on dry weight of the binder.

7. The process as recited in claim 6 , wherein said extrudate further comprises zeolite ZSM-12 that is present therein in an amount of at most 50% wt., based on the weight of said EU-2 zeolite present in said catalyst composition.

8. The process as recited in claim 7 , wherein the amount of EU-2 zeolite is at least 25% wt. and at most 65% wt.

9. The process as recited in claim 8 , wherein said plasticizing agent is methylcellulose or a methylcellulose derivative.

10. The process as recited in claim 9 , wherein said binder contains at most 0.2% wt. alumina, based on dry weight of the binder.

11. The process according to claim 10 , wherein said contacting temperature is in the range of from 275 to 350° C. and said contacting pressure is in the range of from 15×10 5 to 170×10 5 Pa.

12. The process according to claim 11 , wherein said wax-containing feedstock has a wax content of at least 50% by weight as determined by ASTM method D3235.

13. The process according to claim 12 , wherein said reduction of the pour point of said wax-containing feedstock is at least 20° C.

14. The process according to claim 13 , wherein said wax-containing feedstock has a wax content of at least 80% by weight.

Assignees

• Shell Oil Co

Inventors

• Domokos László
• Huve Laurent Georges
• Jongkind Hermanus
• Klazinga Aan Hendrik
• Rigutto Marcello Stefano

Classifications

• B01J37/18

  with gases containing free hydrogen · CPC title

• B01J29/70

  of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 · 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

• B01J23/42 Primary

  Platinum · CPC title

• C10G2300/1062

  Lubricating oils · CPC title