Catalytic metal additive concentrate and method of making and using
First Claim
1. A high temperature stable platinum and/or cerium fuel additive dosing unit, comprising:
- (a) catalytic metal additive concentrate comprising fuel soluble platinum and/or cerium composition stable at temperatures above 100°
C., uniformly dispersed in an organic carrier in relative quantities to be normally solid;
(b) encapsulated with a solid polymer as an infusion control composition.
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Accused Products
Abstract
Delivery of metallic combustion catalysts to internal combustion engines and other combustion devices is improved by dosing units that have the ability to effect the slow and positive supply of metallic additives, including platinum and/or cerium containing catalyst compositions, to fuel. The invention provides additive dosing materials and methods for simply and effectively supplying catalytic metal fuel additives to fuel in suitable low concentrations as are effective. The dosing units can be used with devices made to contact diesel fuel. In one approach, a catalytic metal additive concentrate (CMAC) is prepared in normally solid, semisolid or viscous form. The CMAC will preferably be encapsulated with a solid polymer. The encapsulation can be accomplished by embedding or dispersing the CMAC in a suitable polymer. If desired, the CMAC can be dispersed in one polymer and then the resulting composite can be embedded in the same or a different polymer. In an alternative form, a dosing unit can comprise a semisolid CMAC, which could be similarly held in contact with flowing fuel.
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Citations
16 Claims
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1. A high temperature stable platinum and/or cerium fuel additive dosing unit, comprising:
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(a) catalytic metal additive concentrate comprising fuel soluble platinum and/or cerium composition stable at temperatures above 100°
C., uniformly dispersed in an organic carrier in relative quantities to be normally solid;
(b) encapsulated with a solid polymer as an infusion control composition. - View Dependent Claims (2, 3, 4, 5, 11)
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6. A method of preparing a solid dosing form of fuel additive, by:
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preparing a stable dispersion of platinum composition in a predetermined Pt/Ce ratio in a solution of cerium soap;
encapsulating the viscous catalytic metal additive concentrate comprising fuel soluble platinum and/or cerium composition stable at temperatures above 100°
C. with a infusion controlling polymer. - View Dependent Claims (7, 8, 9)
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10. A method of preparing a solid dosing form of fuel additive, by:
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preparing a solution of a platinum and/or cerium composition including a low-boiling solvent including a sufficient amount of high-boiling solvent to retain fluidity of the composition in the absence of the low-boiling solvent;
evaporating the low-boiling solvent to prepare a viscous catalytic metal additive concentrate comprising fuel soluble platinum and/or cerium composition stable at temperatures above 100°
C.;
encapsulating the viscous catalytic metal additive concentrate comprising fuel soluble platinum and/or cerium composition stable at temperatures above 100°
C. with a infusion controlling polymer.
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12. A method of forming a catalytic metal additive concentrate, comprising:
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forming a mixture of a catalytic metal soap and a solvent;
removing low-boiling solvent. - View Dependent Claims (13, 14, 15, 16)
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Specification