A kind of residual oil hydrogenation antiscaling agent and preparation method thereof

Abstract

A disclosed hydrogenation scale inhibitor of residual oil comprises the following compositions in percent by weight: 10-30% of an organic solvent, 10-25% of ashless phosphate, 10-25% of p,p-di-iso-octyl-diphenylamine, 10-20% of a heterocyclic compound and 10-20% of synthetic calcium sulfonate. Also, the invention discloses a preparation method of the above scale inhibitor. The hydrogenation scale inhibitor gives play to effects of inhibiting fouling and removing a part of formed scale, thereby guaranteeing the heat exchange efficiency of a heat exchanger and the stable and long-term operation of an apparatus. The hydrogenation scale inhibitor has no any damage effects to residual-oil hydrogenation catalysts, does not influence the activity and the stability of the catalysts. Also, the hydrogenation scale inhibitor is good in oil solubility, proper in viscosity, convenient to use, low in addition amount and free of corrosion effect on residual-oil hydrogenation apparatuses. The preparation method is scientific and does not generate any pollution.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and in particular relates to a residual oil hydrogenation scale inhibitor and a preparation method thereof. Background technique [0002] With the rapid growth of the national economy, the demand for petroleum products continues to increase. In recent years, my country's coastal refineries have begun to process a large number of imported crude oil, and most of them use crude oil from the Middle East. Middle Eastern crude oil has high sulfur, nitrogen and heavy metal content, which makes its processing, especially its residue processing, more difficult. The hydrogenation process has the effect of stabilizing the unsaturated compounds in the raw materials, and the hydrogenation and modification of the metals, sulfur, oxygen, nitrogen and halogen compounds in the clean raw materials that are harmful to the downstream processing. In order to optimize the raw material structure of downstream pro...

AI Technical Summary

Problems solved by technology

However, during the cleaning and upgrading process of residual oil hydrogenation, the heavy weight of raw materials will lead to an increase in the tendency of fouling and coking in the hydrogenation heat exchanger and reactor bed

The coking of the raw material heat exchanger will seriously affect the heat exchange efficiency of the raw material, increase the load of the heating furnace, increase the energy consumption, and reduce the processing capacity of the raw material of the device; the coking of the catalyst bed will increase the pressure drop of the bed, and even block the bed, seriously When the device is forced to shut down, the economic benefits of the device will be affected