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| Number | Title | Issue Date |
| 6228239 | Crude oil desalting method In one embodiment, the invention is related to a process for desalting crude oil that requires less wash water than conventional desalting methods. In the preferred embodiment of the invention, a chemical demulsifier formulation comprising an emulsion-bre... | 05/08/2001 |
| 6168702 | Chemical demulsifier for desalting heavy crude The chemical demulsifier formulation has the formula: ##STR1## wherein R1 is H or an alkoxide of from 5 to about 20 carbon atoms; x is an integer of from about 8 to about 22 when R1 is hydrogen and from about 2 to about 5 when R... | 01/02/2001 |
| 6113765 | Methods for enhanced resolution of hydrocarbon continuous emulsions or dispersions with conductivity modifiers A method of increasing the efficiency of the electrostatic separation of a continuous hydrocarbon emulsions or dispersion by increasing the electrical conductivity of the emulsion or dispersion. An increase in electrical conductivity is provided with an e... | 09/05/2000 |
| 5861089 | Electric field enhanced coalescence of emulsions comprising a silicon containing compound or silicon containing polymer A process for separating an emulsion into separate and easily recoverable phases. The process comprises exposing an emulsion comprising a discontinuous phase and a non-conducting continuous phase to an electric field thereby effecting coalescence of the d... | 01/19/1999 |
| 4904412 | Emulsion-forming composition An emulsion-forming composition for forming an emulsion for use in a process for selectively recovering germanium or arsenic from an aqueous solution thereof by liquid membrane technology is disclosed, said composition consisting essentially of: a solvent... | 02/27/1990 |
| 4879014 | Removal of organic acids from freshly produced bitumen Process for removal of organic acids from bitumen comprising (a) Bitumen is diluted with low-density hydrocarbons. (b) A dilute solution of caustic soda in water is intimately mixed with the diluted bitumen. (c) A demulsifying chemical is added to weaken the interf... | 11/07/1989 |
| 4820400 | Process for removing haze from dewaxed hydrocarbon oil mixture boiling in the lubricating oil range (OP-3379) For removing haze from dewaxed hydrocarbon oil mixture boiling in the lubricating oil range which is hazy, the hazy oil mixture is filtered in the filtration stage (201) of a dewaxing plant which is concurrently filtering undewaxed hydrocarbon oil mixture... | 04/11/1989 |
| 4622119 | Method of promoting nucleation of solute in a solution To promote nucleation of a solute in a solution (e.g. wax dissolved in lubricating oil), free excess charge which is net unipolar is introduced into the solution, for example by charge injection, and the solubility for the solute is reduced (for example b... | 11/11/1986 |
| 4618432 | Method and apparatus for charging a contaminant-laden liquid In order to inject a net unipolar charge, for example using a charge injector (1), into a liquid containing a dispersed contaminant without risk of blockage or arcing in the charge injector which could arise if the contaminated liquid were passed through ... | 10/21/1986 |
| 4360502 | Recovery of tungsten values from alkali tungstate solutions by solvent extraction After stripping tungsten values from a loaded organic extractant in a two component extraction system for producing ammonium tungstate from aqueous alkali metal tungstate solutions, the organic extractant and aqueous solution of ammonium tungstate are fed... | 11/23/1982 |
