Process for the treatment of liquefied hydrocarbons using 3-(piperazine-1-YL)propane-1,2-diol compounds

Patent metadata

Field	Value
Publication number	US-9518240-B2
Application number	US-201314399799-A
Country	US
Kind code	B2
Filing date	Jun 11, 2013
Priority date	Jun 15, 2012
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

A method for treating liquefied hydrocarbons including acid gases to remove said acid gases while minimizing loss of amine species, he method comprising the step of contacting he liquefied hydrocarbons with an absorbent aqeuous solution of a first amine compound, the first amine compound having the structure:

wherein R 1 is hydrogen or propane-2,3-diol and R 2 is propane-2,3-diol, or mixtures thereof.

First claim

The claimed invention is:

1. A method for treating liquefied hydrocarbons comprising acid gases to remove said acid gases while minimizing loss of amine species, said method comprising the step of contacting said liquefied hydrocarbons with an absorbent aqueous solution of a first amine compound, said first amine compound having the structure:

wherein R 1 is hydrogen or propane-2,3-diol and R 2 is propane-2,3-diol, or mixtures thereof.

2. The method of claim 1 , wherein said absorbent aqueous solution comprises from about 0.1 wt. % to 90 wt. % of said first amine compound and additionally comprises from about 1 wt. % to 90 wt. % of a second amine compound.

3. The method of claim 1 , wherein said absorbent aqueous solution comprises from about 0.1 wt. % to 50 wt. % of said first amine compound and from about 5 wt. % to 50 wt. % of a second amine compound.

4. The method of claim 1 , wherein R 1 is hydrogen.

5. The method of claim 1 , wherein R 1 and R 2 are propane-2,3-diol.

6. The method of claim 1 , wherein said acid gases comprise one or more gases selected from the group consisting of CO 2 , H 2 S, a mercaptan compound, COS, CS 2 , and mixtures thereof.

7. The method of claim 1 , wherein said aqueous solution comprises a second amine compound comprising a piperazine compound selected from the group consisting of piperazine, 2-methylpiperazine, 2-hydroxyethylpiperazine and mixtures thereof.

8. The method of claim 1 , wherein said absorbent aqueous solution comprises a second amine compound selected from the group consisting of triethanolamine, diethanolamine, methyldiethanolamine, diisopropanolamine, 2-amino-2-(hydroxymethyl)propane-1,3-diol, 2-methylamino-2-(hydroxymethyl)propane-1,3-diol, 2-dimethylamino-2-(hydroxymethyl)propane-1,3-diol, 3-(2-(hydroxyethyl)methylamino-propane-1,2-diol, 3-(methylamino)bis(propane-1,2-diol), 3-(amino)tris(propane-1,2-diol), 3-(methylamino)propane-1,2-diol, 3-(amino)propane-1,2-diol, 3-(amino)bis(propane-1,2-diol) and mixtures thereof.

9. The method of claim 1 , wherein said absorbent aqueous solution comprises an acid, said acid selected from the group consisting of boric acid, hydrochloric acid, sulfuric acid, phosphoric acid and mixtures thereof.

Assignees

• Dow Global Technologies Llc

Inventors

• Laroche Christophe R
• Hill James M

Classifications

• C10L2290/541

  Absorption of impurities during preparation or upgrading of a fuel · CPC title

• C10G21/20 Primary

  Nitrogen-containing compounds · CPC title

• C10G29/20

  Organic compounds not containing metal atoms · CPC title

• C10L3/102

  of acid contaminants · CPC title

• C10L3/12 Primary

  Liquefied petroleum gas {(liquefying by pressure and cold treatment F25J)} · CPC title