Reformer distillate as gassing additive for transformer oils
AssigneeExxonMobil Research and Engineering Company
InventorsS. Darden Sinclair, Martin A. Krevalis, Dominick N. Mazzone, Jean-Luc Martin, Louis F. Burns
Life of this patent
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Abstract
This invention relates to reformer distillates as gassing additives for transformer oils. The reformer distillates have a 1-ring and 2-ring aromatics content of at least 98%, and are added such that the transformer oil contains less than 10 wt % of reformer distillate. The invention also relates to a method for preparing transformer oils containing reformer distillates and having excellent gassing tendency, oxidative stability, viscosity and volatility.
Claims10
A transformer oil comprising a dielectric fluid and between 3 and 6 wt %, based on transformer oil, of a reformer distillate, the reformer distillate comprising between 9.6 vol % and 16.9 vol % of C11 to C13 alkylbenzenes and between 64.2 vol % and 76.1 vol % of alkylated naphthalenes, based on reformer distillate, wherein the gassing tendency of the transformer oil is between −28.2 and −54.2 μL/min.
A process for preparing a transformer oil which comprises reforming a naphtha feedstream under catalytic reforming conditions to produce a reformate, distilling the reformate to produce a reformate distillate having between 9.6 vol % and 16.9 vol % of C11 to C13 alkylbenzenes and between 64.2 vol % and 76.1 vol % of alkylated naphthalenes, combining the reformate distillate having a mixture of C11 to C13 alkylbenzenes and alkylated naphthalenes with a dielectric fluid to form a transformer oil wherein the amount of reformer distillate in the transformer oil is between 3 and 6 wt % based on the transformer oil, wherein the gassing tendency of the transformer oil is between −28.2 and −54.2 μL/min.
Dependencies are inferred from the claim text.