Dispersants and process for their preparation
AssigneeThe Lubrizol Corporation
InventorsJohn Francis Pindar, Jerome Martin Cohen, Charles Peterson Bryant
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Abstract
Compositions useful as lubricant and fuel dispersants are prepared by reacting a hydroxyaromatic compound containing an aliphatic or alicyclic substituent which has at least about 6 carbon atoms with an aldehyde in the presence of an alkaline reagent and at a temperature up to about 125.degree.C., substantially neutralizing the resulting intermediate at a temperature up to about 150.degree.C., and then reacting with a primary or secondary amino compound.
Claims28
A lubricating composition comprising a major amount of a lubricating oil and a minor amount of a nitrogen-containing composition made by the method which comprises
- 1. reacting at least one hydroxyaromatic compound containing an aliphatic or alicyclic substituent of at least about six carbon atoms with at least one aldehyde or precursor thereof in the presence of an alkaline reagent, at a temperature up to about 125.degree.C.;
- then
- 2. substantially neutralizing the intermediate thus formed at a temperature up to about 150.degree.C.;
- and then
- 3. reacting the neutralized intermediate with at least one amino compound which contains one or more amino groups having hydrogen directly bonded to amino nitrogen.
A fuel composition comprising a major amount of a normally liquid fuel and a minor amount of a nitrogen-containing composition made by the method which comprises
- 1. reacting at least one hydroxyaromatic compound containing an aliphatic or alicyclic substituent of at least about six carbon atoms with at least one aldehyde or precursor thereof in the presence of an alkaline reagent, at a temperature up to about 125.degree.C.;
- then
- 2. substantially neutralizing the intermediate thus formed at a temperature up to about 150.degree.C.;
- and then
- 3. reacting the neutralized intermediate with at least one amino compound which contains one or more amino groups having hydrogen directly bonded to amino nitrogen.
An additive concentrate comprising about 20-90% by weight of a nitrogen-containing composition made by the method which comprises
- 1. reacting at least one hydroxyaromatic compound containing an aliphatic or alicyclic substituent of at least about six carbon atoms with at least one aldehyde or precursor thereof in the presence of an alkaline reagent, at a temperature up to about 125.degree.C.;
- then
- 2. substantially neutralizing the intermediate thus formed at a temperature up to about 150.degree.C.;
- and then
- 3. reacting the neutralized intermediate with at least one amino compound which contains one or more amino groups having hydrogen directly bonded to amino nitrogen.
Dependencies are inferred from the claim text.