Integrated process for activating hydroprocessing catalysts with in-situ produced sulfides and disulphides

Patent metadata

Field	Value
Publication number	US-10400183-B2
Application number	US-201916267942-A
Country	US
Kind code	B2
Filing date	Feb 5, 2019
Priority date	Oct 25, 2017
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

The invention involves an integrated process in which a hydrocarbon feedstock is treated with a caustic (alkaline) extraction to remove sulfides, disulfides, and mercaptans. These extracted materials are further treated, and are then used to activate hydrotreating catalysts.

First claim

We claim:

1. An integrated process for removing sulfur containing hydrocarbons from a hydrocarbon feedstock and activating a hydroprocessing catalyst, comprising:
(i) contacting said hydrocarbon feedstock to an alkaline extraction solution in an extraction vessel, to remove sulfides, disulfides, and mercaptans;
(ii) reacting the mercaptans with an alkali in said alkaline extraction solution to form thiolates;
(iii) contacting said thiolates with oxygen in the presence of a catalyst, to form a mixture of sulfides and disulfides;
(iv) removing any sulfides and disulfides from said alkaline solution by adsorbing said sulfides and disulfides to an adsorbent, to form a mixture;
(v) removing any non-sulfur compounds from said mixture, and
(vi) activating a hydroprocessing catalyst by contact of said sulfur containing compounds to said hydroprocessing catalyst.

2. The process of claim 1 , comprising carrying out (i) and (ii) at a temperature of 15° C. to 80° C.

3. The process of claim 2 , comprising carrying out (i) and (ii) at a temperature of 40° C. to 60° C.

4. The process of claim 1 , comprising carrying out (i) and (ii) at a pressure of 10-50 bars.

5. The process of claim 1 , comprising carrying out (iii) at a temperature of from 20° C. to 300° C.

6. The process of claim 5 , comprising carrying out (iii) at a temperature of from 20° C. to 80° C.

7. The process of claim 1 , comprising removing water soluble sulfur containing compounds in (iv) via a water wash.

8. The method of claim 1 , wherein said adsorbent is activated carbon alumina, silica alumina, sand, a zeolite, or a regenerated spent catalyst.

9. The method of claim 1 , wherein said hydrocarbon feedstream is natural gas, fuel gas, liquefied petroleum gas, a pentane mixture, light straight run naphtha, light thermally cracked naphtha, full straight run naphtha, full FCC cracked naphtha, heavy FCC cracked naphtha, heavy SR naphtha, aviation turbine fuel, kerosene, or a distillate fuel having a boiling point of up to 350° C.

10. The process of claim 1 , wherein said extraction vessel comprises a plurality of liquid-liquid contacting decks.

Assignees

• Saudi Arabian Oil Co

Inventors

• Koseoglu Omer Refa
• Hodgkins Robert Peter

Classifications

• C10G21/30

  Controlling or regulating · CPC title

• B01J37/20

  Sulfiding · CPC title

• C10G2300/4006

  Temperature · CPC title

• C10G53/12 Primary

  including at least one alkaline treatment step · CPC title

• B01D11/0488

  Flow sheets · CPC title