Acidic aqueous solution containing a chelating agent and the use thereof
US9803134B2 · kind B2 · utility
8Cited by
8References
26Claims
0Family size
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Key dates
| Filing date | Oct 10, 2008 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Nov 18, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D3/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An acidic aqueous solution containing a chelating agent and an acid, wherein the chelating agent is glutamic acid N,N-diacetic acid (GLDA) or a salt thereof, and wherein the amount of GLDA or the salt thereof is at least 10 wt %, based on the weight of the aqueous solution, and to the use thereof as an oilfield chemical, in descaling processes, or in processes in which highly concentrated aqueous acids are used, such as cleaning processes or plating processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.