# US 9,039,892 B2 · Nano catalytic dewaxing of heavy petroleum wastes (>C-23 alkanes)

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- Number: US 9,039,892 B2
- Document ID: US9039892B2
- Status: Granted
- Kind: B2
- Application number: 13/603,662
- Filed: 2012-09-05
- Published: 2014-03-06
- Granted: 2015-05-26
- Earliest claimed: 2012-09-05
- Applicants: Syed Tajammul Hussain; Mehmood Ahmed
- Inventors: Syed Tajammul Hussain; Mehmood Ahmed
- Web page: https://patentgrep.com/patent/US9039892B2

## CPC

- C10G 45/64: containing crystalline alumino-silicates, e.g. molecular sieves
- C10G 2300/1022: Fischer-Tropsch products
- C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES

## Abstract

A catalyst comprising of nano nickel-silica catalyst for dewaxing of heavy petroleum feed at a temperature 200-350° C. at 8 bar and 30 bar hydrogen pressure and in the presence of hydrogen is designed for petrochemical industries. According to a specific aspect of the invention, the nano catalyst is designed and employed to convert heavy hydrocarbon feeds of high viscosity index to low pour point and good stability in a single step.

## Claims

### Claim 1

A process for dewaxing a heavy wax feed stock consisting of hydrocarbons with higher than 23 carbons comprising:
mixing the feed stock with a nickel-silica nano catalyst in an autoclave;
heating the autoclave to a temperature of 160° C. while flushing with argon gas;
pressurizing the autoclave with hydrogen gas to provide a pressure of 8 to 30 bar; and,
continuous mixing the mixture for 30-50 minutes at 100 rotation per minute, cooling to room temperature and separating the solid and liquids in the autoclave.

### Claim 2 (depends on 1)

The process according to claim 1 wherein the particles size of nickel-silica catalyst is 15 nms.

### Claim 3 (depends on 1)

The process according to claim 1 wherein the surface area of nickel-silica catalyst 450 m2g-1.

### Claim 4 (depends on 1)

The process according to claim 1 wherein in the pore size of the catalyst is 4.0-6.5 mls/gms.

### Claim 5 (depends on 1)

The process according to claim 1 wherein the catalyst contains different oxidation states of nickel.

### Claim 6 (depends on 1)

The process according to claim 1 wherein the silica has bronsted acid sites ranging from 0.8-2 mls/g catalyst.

### Claim 7 (depends on 1)

The process according to claim 1 wherein Ni is replaced by Co and Mo.

### Claim 8 (depends on 1)

The process according to claim 1 wherein Ni is replaced by Ni:Mo.

### Claim 9 (depends on 1)

The process according to claim 1 wherein the nano catalyst amount varies from 0.5% to 0.8% of the total feedstock.

### Claim 10 (depends on 1)

The process according to claim 1 wherein the feedstock comprises hydrocarbons and waxes is selected from the group consisting of fuels, oils, jet fuels, lube oils, naptha, reformate, and products of Fischer Trospsch reaction.

### Claim 11 (depends on 1)

The catalyst according to claim 1 where the ratio between the nickel and silica is between 1:10.

### Claim 12 (depends on 1)

The catalyst according to claim 1 wherein the silica is replaced by zeolite.