Abstract A highly stable metal oxide oil slurry useful in reducing slag, facilitating removal of deposits from boiler tubes, and reducing corrosion on the heating surfaces of boilers has been developed. Such a slurry consists essentially of about 50% by weight magnesium oxide or the entity of magnesium oxide and alumina oxide, together with an oil-soluble emulsifier such as alkanolamide and preferably ethanolamide, or an alkanol with a carbon chain greater than a C3 alcohol, an oil-soluble dispersant such as a C12-C22 entity selected from an unsaturated or saturated fatty acid; e.g., oleic acid. Also, as a constituent is an anionic surfactant such as magnesium lauryl sulfate in an oil base such as No. 2 fuel oil. The alkanolamide is fashioned from heating alkanolamines and fatty acids either in a 1:1 ratio or 2:1 ratio. The reactant amino alcohol is in the range C10-C24. The alcohol itself is greater than C3 and up to C16, with a preferred range C12-C16.
Inventors
👤 George T. Kekish
👤 Mei-Jan L. Lin
👤 John H. Collins
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-01 02:49
CPC Classifications
F; F28; F28G; F28G9/00; F28F; F28F19/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
66 words
A metal oxide slurry consisting essentially of: (a) about 50% by weight of magnesium oxide or the entity of magnesium oxide plus alumina (b) about 1% by weight of an oil-soluble emulsifier and wetting agent (c) about 4% by weight of an oil-soluble dispersant (d) about 2% by weight of an insoluble thickening agent (e) about 43% by weight, or a balance, of a hydrocarbon oil.
Claim 2
Dependent Claim
66 words
A metal oxide slurry consisting essentially of: (a) about 50% by weight of magnesium oxide or the entity of magnesium oxide plus alumina (b) about 1% by weight of an oil-soluble emulsifier and wetting agent (c) about 4% by weight of an oil-soluble dispersant (d) about 2% by weight of an insoluble thickening agent (e) about 43% by weight, or a balance, of a hydrocarbon oil.
Claim 3
Dependent Claim
48 words
A metal oxide oil slurry consisting essentially of: (a) about 50% by weight of magnesium oxide (b) about 1% by weight of alkanolamide (c) about 4% by weight of oleic acid (d) about 2% by weight of magnesium lauryl sulfate (e) about 43% by weight of hydrocarbon oil.
Claim 4
Dependent Claim
48 words
A metal oxide oil slurry consisting essentially of: (a) about 50% by weight of magnesium oxide (b) about 1% by weight of alkanolamide (c) about 4% by weight of oleic acid (d) about 2% by weight of magnesium lauryl sulfate (e) about 43% by weight of hydrocarbon oil.
Claim 5
Dependent Claim
50 words
A metal oxide oil slurry consisting essentially of: (a) 45-55% by weight of magnesium oxide or the entity of magnesium oxide and alumina oxide (b) 1-3% by weight of alkanolamide (c) 2-6% by weight of oleic acid (d) 1-3% by weight of magnesium lauryl sulfate (e) the balance hydrocarbon oil.
Claim 6
Dependent Claim
50 words
A metal oxide oil slurry consisting essentially of: (a) 45-55% by weight of magnesium oxide or the entity of magnesium oxide and alumina oxide (b) 1-3% by weight of alkanolamide (c) 2-6% by weight of oleic acid (d) 1-3% by weight of magnesium lauryl sulfate (e) the balance hydrocarbon oil.
Claim 7
Dependent Claim
11 words
The slurry according to claim 2 wherein the alkanolamide is ethanolamide.
Claim 8
Dependent Claim
26 words
The oil slurry according to claim 3 wherein the percentile of magnesium oxide is 45% by weight and the percentile of alumina is 5% by weight.
Claim 9
Dependent Claim
36 words
A metal oxide oil slurry consisting essentially of 1 part alkanolamide mixed with 4 parts oleic acid; 43 parts No. 2 fuel oil; 45.45 parts magnesium oxide; 4.55 parts alumina trihydrate; 2 parts maleic lauryl sulfate.
Claim 10
Dependent Claim
36 words
A metal oxide oil slurry consisting essentially of 1 part alkanolamide mixed with 4 parts oleic acid; 43 parts No. 2 fuel oil; 45.45 parts magnesium oxide; 4.55 parts alumina trihydrate; 2 parts maleic lauryl sulfate.