Adsorbent for removal of con-carbon and contaminant metal present in hydrocarbon feed

Patent metadata

Field	Value
Publication number	US-9616408-B2
Application number	US-201314415534-A
Country	US
Kind code	B2
Filing date	Aug 17, 2013
Priority date	Aug 17, 2012
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

The present invention provides an adsorbent for removal of con-carbon and contaminant metals in feed, said adsorbent composition consisting of clay in the range of 30-70 wt. % and silica in the range of 70-30 wt. %, wherein the adsorbent has a pore volume in the range of 0.25-0.45 cc/gm; a pore size in the range of 20 to 2000 Å and a bi-modal pore size distribution characteristics, with a maximum of about 32% of the adsorbent having a pore size in the range of 20-200 Å and a minimum of about 68% of the adsorbent having a pore size in the range of 200-2000 Å. The present invention also provides a process for preparing the said adsorbent.

First claim

What claimed is:

1. An adsorbent for removal of con-carbon and contaminant metals in feed, said adsorbent consisting of:
(a) clay in the range of 30-70 wt. %; and
(b) silica in the range of 70-30 wt. %,
wherein the adsorbent has a pore volume in the range of 0.25-0.45 cc/gm; a pore size in the range of 20 to 2000 Å; and a bi-modal pore size distribution characteristics, with a maximum of about 32% of the adsorbent having a pore size in the range of 20-200 Å and a minimum of about 68% of the adsorbent having a pore size in the range of 200-2000 Å.

2. The adsorbent as claimed in claim 1 , wherein the clay is in the range of 35-65 wt. %, and silica is in the range of 65-35 wt. %.

3. The adsorbent as claimed in claim 1 , wherein the clay is in the range of 40-50 wt. %, and silica is in the range of 60-50 wt. %.

4. The adsorbent as claimed in claim 1 , wherein a maximum of 30% of the adsorbent have a pore size in the range of 20-200 Å and a minimum of 70% of the adsorbent having a pore size in the range of 200-2000 Å.

5. The adsorbent as claimed in claim 1 , wherein the silica is formed/sourced from a group comprising of sodium silicate both neutral and alkaline, silicic acid, sodium or ammonium stabilized colloidal silica, or combination thereof.

6. The adsorbent as claimed in claim 1 , wherein the clay is selected from a group comprising of kaolinite, bentonite, illite, vermiculite, smectite, dolomite, or combination thereof.

7. A process for preparing an adsorbent consisting of 30-70 wt. % of clay and 70-30 wt. % of silica, wherein the adsorbent has a pore volume in the range of 0.25-0.45 cc/gm; a pore size in the range of 20 to 2000 Å; and a bi-modal pore size distribution characteristics, with a maximum of 32% of the adsorbent having a pore size in the range of 20-200 Å and a minimum of 68% of the adsorbent having a pore size in the range of 200-2000 Å, said process comprising the steps of:
(a) preparing a silica sol by adding source of silica to an acid;
(b) preparing clay slurry by adding demineralized water containing dispersant;
(c) adding a clay material to the silica sol so as to obtain a clay-silica slurry;
(d) adding a pore regulating agent to the clay-silica slurry and forming shaped microsphere/extrudate from the same; and
(e) calcining the shaped microsphere/extrudate so as to remove the pore regulating agent therefrom to thereby obtain the adsorbent.

8. The process as claimed in claim 7 , wherein the source of silica is selected from a group comprising of sodium silicate both neutral and alkaline, silicic acid, sodium or ammonium stabilized colloidal silica, or combination thereof.

9. The process as claimed in claim 7 , wherein the clay material is selected from a group comprising of kaolinite, bentonite, illite, vermiculite, smectite, dolomite, or combination thereof.

10. The process as claimed in claim 7 , wherein the pore regulating agent is selected from a group comprising of acrylamide polymer, propylene oxide polymer, ethylene oxide polymer, polyvinyl alcohol, C12-C25 surfactants or combination thereof.

11. The process as claimed in claim 7 , wherein the acid is selected from a group comprising of sulfuric acid, nitric acid, hydrochloric acid, formic acid or combination thereof.

12. The process as claimed in claim 7 , wherein the silica sol is prepared by adding source of silica to an acid under controlled temperature between 10-30° C. with pH below 3.

13. The process as claimed in claim 7 , wherein the dispersant is sold under the trademark TAMOL™, which is neutral sodium salt of a condensed arylsufonic acid.

Assignees

• Indian Oil Corp Ltd

Inventors

• Karthikeyani Arumugam Velayutham
• Kuvettu Mohan Prabhu
• Sarkar Biswanath
• Saidulu Gadari
• Choudhury Shiba Prasad
• Pande Sudhir Kumar
• Mahant Arvind
• Kumar Brijesh
• Rajagopal Santanam
• Malhotra Ravinder Kumar
• Chidambaram Velusamy

Classifications

• B01J20/10

  comprising silica or silicate · CPC title

• B01J20/28071

  being less than 0.5 ml/g · CPC title

• B01J20/103

  comprising silica · CPC title

• C10G25/03

  with crystalline alumino-silicates, e.g. molecular sieves · CPC title

• B01J20/3064 Primary

  Addition of pore forming agents, e.g. pore inducing or porogenic agents · CPC title