Coking-prevention light oil yield increasing agent for delayed coker of oil refinery

Abstract

The invention provides a coking-prevention light oil yield increasing agent for a delayed coker of an oil refinery. The coking-prevention light oil yield increasing agent comprises the following raw materials in percentage by mass: 35-37% of high-temperature-resistance antioxygen, 13-15% of high-temperature-resistance clearing agent, 10% of high-temperature-resistance dispersing agent, 5% of high-temperature-resistance metal deactivator, 5% of surfactant and 30% of solvent naphtha, wherein the high-temperature-resistance antioxygen is at least one of 2,6-di-tert-butyl catechol, 2,6-di-tert-butyl-p-cresol and 2.6-di-tert-butyl-ethylphenol, the high-temperature-resistance clearing agent is high-base-number linear alkyl benzene sulfonic acid calcium, the high-temperature-resistance dispersing agent is polyisobutylene bissuccinimide, the surfactant is fatty amine polyoxyethylene ether, the high-temperature-resistance metal deactivator comprises at least one of the following inorganic antimony compounds: antimony pentoxide, colloidal solution of antimony pentoxide, antimony pentasulfide, antimony sulfate, or the high-temperature-resistance metal deactivator comprises at least one of the following organic antimony compounds: stibium mercaptide, tricarboxylic antimony, triphenyl antimony, antimony diisopropyl dithiophosphate. The coking-prevention light oil yield increasing agent can be applied to the delayed coker of the oil refinery, the coking resistance rate is higher than 85%, and the yield of light oil is improved by over 1.5%.

Description

technical field [0001] The invention relates to an anti-coking light oil yield increase agent used for a delayed coking unit in an oil refinery. Background technique [0002] With the increasing shortage of crude oil resources in the world and the heavier and worse properties of crude oil, there are some chemically unstable substances (such as sulfur, nitrogen, oxygen and metal compounds) in the raw materials in my country's oil refining production process to varying degrees. It makes the raw materials easy to produce some organic substances and inorganic substances in the process of storage and transportation. These substances are deposited on the tube wall of the raw material heat exchanger and on the bed of the reactor to form scale, which reduces the heat transfer efficiency: the material flow rate also slows down. , the pressure increases, which shortens the operation cycle, increases the energy consumption and maintenance costs of the device, and seriously affects the no...

AI Technical Summary

Problems solved by technology

[0002] With the increasing shortage of crude oil resources in the world and the heavier and worse properties of crude oil, there are some chemically unstable substances (such as sulfur, nitrogen, oxygen and metal compounds) in the raw materials in my country's oil refining production process to varying degrees. It makes the raw materials easy to produce some organic substances and inorganic substances in the process of storage and transportation. These substances are deposited on the tube wall of the raw material heat exchanger and on the bed of the reactor to form scale, which reduces the heat transfer efficiency: the material flow rate also slows down. , the pressure increases, which shortens the operation cycle, increases the energy consumption and maintenance costs of the device, and seriously affects the normal production of the refining device.

At present, the scale inhibitors commonly used in oil refining systems only solve the problem of scale inhibition, and the effect is not ideal