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US 9,434,889 B2Granted
Additive and method for removal of calcium from crude oils containing calcium naphthenate
AssigneeDorf Ketal Chemicals (India) Private Limited
InventorMahesh Subramaniyam
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Abstract
There is provided an additive and method for removal of calcium from crude oil or its blends containing calcium naphthenate at low pH as well as at high pH. Particularly, there is also provided an additive and method for removal of calcium from crude oil or its blends containing calcium naphthenate under basic or alkaline conditions and at low pH as well as at high pH varying from about 5 to 11.
Claims8
A method for removing calcium from crude oil or its blends containing calcium naphthenate, and having no sulfur or having less than 0.2% by wt. sulfur contents of the crude oil or its blend, and
- comprising adding to the crude oil or its blends or wash water for desalter an additive consisting of glyoxylic acid;
- and
- wherein the crude oil or its blends or the wash water for the desalter have:
- i) a pH varying from 5 to 11;
- and
- ii) one or more basic or alkaline compounds.
3 more elements
Dependencies are inferred from the claim text.