Lubricating oil dispersants derived from heavy polyamine

A process for producing a hydrocarbon having functional groups of the formula --CO--Y--R.sup.3 wherein each Y is independently O or S, and each R.sup.3 is independently H, hydrocarbyl, substituted hydrocarbyl, aryl, or substituted aryl, derivatized with a heavy polyamine, said process comprising the steps of reacting

• (a) at least one hydrocarbon;
• (b) carbon monoxide;
• (c) at least one acid catalyst having a Hammett acidity of less than -7;
• and
• (d) a nucleophilic trapping agent selected from the group consisting of water, hydroxy-containing compounds and thiol-containing compounds, the reaction being conducted in the absence of reliance on transition metal as catalyst;
• optionally wherein the nucleophilic trapping agent has a pKa of less than 12, to form a functionalized hydrocarbon;
• and
• derivatizing said functionalized hydrocarbon with a heavy polyamine comprising a mixture of polyamines having 6 to 12 nitrogens per molecule, an average of 7 or more nitrogens per molecule, a nitrogen content of at least 28 wt. % and an equivalent weight of about 120 to about 160 grams per equivalent of primary amine.