Title:
パイプライン中の硫化鉄堆積物を減少させる方法および組成物
Document Type and Number:
Japanese Patent JP2005523378
Kind Code:
A
Abstract:
The levels of iron sulfide present in a conduit, such as a pipeline, are reduced by contacting the conduit, on an inner surface, with a composition obtained from an aqueous solution containing at least one compound of Formula (I) and at least one amine or corresponding ammonium derivative in the presence of a solvent, wherein X is an anion of valency n. Preferably, the pH of the solution is about 8. Alternatively, the method employs a composition comprising tris(hydroxymethyl)phosphine (TRIS) and at least one amine or corresponding ammonium derivative. The amine preferably is ammonia or a primary alkylamine. The compositions readily complex and thereby dissolve deposits of iron(II) sulfide, removing them from the conduit.
Inventors:
Matox, Mark, Andrew
Valent, Edward, Jay.
Valent, Edward, Jay.
Application Number:
JP2003521742A
Publication Date:
August 04, 2005
Filing Date:
August 14, 2002
Export Citation:
Assignee:
Synergy Chemicals, Inc.
International Classes:
C09K3/00; B08B9/02; C09K8/528; C09K13/00; C09K13/02; C10G75/04; C11D7/06; C11D7/36; C11D11/00; C23F11/167; C23F14/02; C23G1/24; F16L58/10; (IPC1-7): C23G1/24
Domestic Patent References:
| JPH0699255B2 | 1994-12-07 | |||
| JPH0578983A | 1993-03-30 | |||
| JPS62167896A | 1987-07-24 |
Foreign References:
| WO1999046989A1 | 1999-09-23 |
Attorney, Agent or Firm:
Yusuke Hiraki
Ishii Teiji
Satoshi Fujita
Ishii Teiji
Satoshi Fujita