Bitumen emulsions
AssigneeEmoleum (Australia) Limited
InventorGlynn Holleran
Life of this patent
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Abstract
A method of modifying a cationic bitumen emulsion by initiating coalescence by either (i) adding a specific chemical agent or (ii) physical reaction. The method includes modifying the bitumen emulsion by combining a second emulsion with a primary emulsion having an aqueous phase to create a bimodal distribution.
Claims9
A method of initiating and accelerating coalescence in a cationic bitumen emulsion, comprising the steps of:
- providing a primary emulsifier system of a cationic bitumen emulsion that has been emulsified by a primary emulsifier;
- and
- adding to the emulsion a chemical agent selected from the group consisting of sodium or calcium silicic acid in salt form or ethylene glycol diacetate in a sufficient quantity to raise the pH of the emulsion to initiate and accelerate coalescence by destabilizing the primary emulsifier system.
A method of initiating and accelerating coalescence in a cationic bitumen emulsion, comprising the steps of:
- providing a primary emulsifier system of a cationic bitumen emulsion that has been emulsified by a primary emulsifier;
- and
- adding to the emulsion a chemical agent capable of initiating and accelerating coalescence of the emulsion in a sufficient quantity to initiate and accelerate coalescence by destabilizing the primary emulsifier system,
- wherein the chemical agent is an oil soluble short chain aromatic or polar aromatic breaker agent, and is added prior to emulsification of the bitumen.
A method of initiating and accelerating coalescence in a cationic bitumen emulsion, comprising the steps of:
- providing a primary emulsifier system of a cationic bitumen emulsion that has been emulsified by a primary emulsifier;
- and
- adding to the emulsion, in a sufficient quantity to initiate and accelerate coalescence by destabilizing the primary emulsifier system, a chemical agent selected from propylene oxide containing compounds, ethylene glycol monobutyl ether phosphate, calcium dodecylbenzene sulphate, or a chemical agent able to modify a hydrophobic lipophilic balance at an interface of phases of the emulsion.
Dependencies are inferred from the claim text.