IP Library › Granted Patent US 9,604,206
Granted Patent B2
US 9,604,206 · App. 14/898,325 · Granted Mar 28, 2017

Method for regenerating COS hydrolysis catalyst

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Quick Facts
Patent No.
US 9,604,206
App. No.
14/898,325
Granted
Mar 28, 2017
Kind
B2
Abstract

A method for regenerating a carbonyl sulfide (COS) hydrolysis catalyst for hydrolyzing COS which is contained in a gas obtained by gasifying a carbon material, wherein a spent COS hydrolysis catalyst is immersed in an acid solution for a prescribed time thereby removing poisoning substances adhering to the surface of the COS hydrolysis catalyst; and thus regenerating the COS hydrolysis catalyst.

Claims (14)

1. A method for regenerating a carbonyl sulfide (COS) conversion catalyst by hydrolyzing COS which is contained in a gas obtained by gasifying a carbon raw material,

wherein a spent COS hydrolysis catalyst is immersed in an acid solution for a prescribed amount of time.

2. A method for regenerating a carbonyl sulfide (COS) hydrolysis catalyst by hydrolyzing COS which is contained in a gas obtained by gasifying a carbon raw material,

wherein a spent COS hydrolysis catalyst is immersed in an alkali solution for a prescribed amount of time;

and then immersed in an acid solution for a prescribed amount of time.

3. A method for regenerating a carbonyl sulfide (COS) hydrolysis catalyst by hydrolyzing COS which is contained in a gas obtained by gasifying a carbon raw material,

wherein a spent COS hydrolysis catalyst is immersed in an acid solution for a prescribed amount of time;

and then immersed in an alkali solution for a prescribed amount of time.

4. The method for regenerating a carbonyl sulfide (COS) hydrolysis catalyst according to claim 1 , wherein

the immersion is performed in a prescribed heated state.

5. The method for regenerating a carbonyl sulfide (COS) hydrolysis catalyst according to claim 2 , wherein

the immersion is performed in a prescribed heated state.

6. The method for regenerating a carbonyl sulfide (COS) hydrolysis catalyst according to claim 3 , wherein

the immersion is performed in a prescribed heated state.

Assignments (4)
CHANGE OF NAME Recorded Dec 14, 2023
From: MITSUBISHI HEAVY INDUSTRIES ENGINEERING, LTD.
To: MHI ENGINEERING, LTD.
Reel/Frame 066014/0774 →
NUNC PRO TUNC ASSIGNMENT Recorded Dec 14, 2023
From: MHI ENGINEERING, LTD.
To: MITSUBISHI HEAVY INDUSTRIES, LTD.
Reel/Frame 066014/0870 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 26, 2018
From: MITSUBISHI HEAVY INDUSTRIES, LTD.
To: MITSUBISHI HEAVY INDUSTRIES ENGINEERING LTD.
Reel/Frame 046633/0906 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 14, 2015
From: YONEMURA, MASANAO; SAWATA, AKIHIRO; TANAKA, YUKIO; YOSHIOKA, HIROSHI; YASUTAKE, TOSHINOBU
To: MITSUBISHI HEAVY INDUSTRIES, LTD.
Reel/Frame 037285/0808 →