Phosphoric triamide coking inhibitors.

摘要

Inhibiting coke formation on heat transfer surfaces used to heat or cool a petroleum feedstock at coke-forming conditions. The heat transfer surfaces are treated with an effective amount of a phosphoric amide (I) to inhibit coke formation on the heat transfer surfaces. The tripiperidinophosphine oxide is essentially free from contributing to corrosion and from producing catalyst-impairing by-products.