| abstract |
The present invention provides additives for the same purpose as the metal removal method in hydrocarbon feedstocks using carboxylic acid esters. Wherein the hydrocarbon stream comprising metals and salts such as calcium and calcium naphthenate is selected from any methyl, ethyl, isopropyl mono and / or diester of three carboxylic acids such as maleic acid, maleic anhydride, or fumaric acid, or Effective metal-removal-extract aqueous solution of a non-precipitable, non-polluting additive comprising a chemical compound selected from the group consisting of a suitable mixture of said esters, or a suitable mixture of any of said esters with any of said three acids. Can be mixed with to form an aqueous phase, including a hydrocarbonaceous phase and a metal ion, and classify the aqueous phase. |