CN-117603734-B - Oil slurry scale inhibitor for catalytic cracker and preparation method thereof

Abstract

The invention discloses a slurry oil scale inhibitor for a catalytic cracker and a preparation method thereof, which relate to the field of slurry oil scale inhibition and comprise, by mass, 15-25% of a dispersing agent, 1-5% of an anti-aging agent and 72-82% of a solvent. The preparation process of the slurry oil scale inhibitor is simple and easy to implement, has low cost, and can effectively improve the comprehensive performance of the slurry oil scale inhibitor.

Inventors

• GU JI
• WU WEIWEI
• YANG LIPING

Assignees

• 江苏科创石化有限公司

Dates

Publication Date

20260512

Application Date

20240111

Claims (2)

1. 1. The oil slurry scale inhibitor of the catalytic cracking device is characterized by comprising the following components in percentage by mass: 15-25% of dispersing agent; 1-5% of an anti-aging agent; 72-82% of solvent; The dispersing agent is a T154 dispersing agent, the anti-aging agent is 4010 anti-aging agent, the purity of the anti-aging agent is more than 92%, and the melting point is more than or equal to 70 ℃; The preparation method of the slurry oil scale inhibitor comprises the following steps: Step 1, a dispersing agent is pumped into a preheater by a vacuum pump to be preheated, and the preheated dispersing agent is obtained after the dispersing agent is preheated to at least 25 ℃; step 2, pumping the preheated dispersing agent and the solvent obtained in the step 1 into a batching tank by utilizing a vacuum pump to mix for 15min to obtain a mixed material; Step 3, pumping the mixed material obtained in the step2 into a reaction kettle by utilizing a vacuum pump to stir for 30min to obtain a stirred material; Step 4, pumping the stirred materials obtained in the step 3 into a reaction pot by utilizing a vacuum pump, adding an anti-aging agent for compound stirring, wherein the stirring time is 30min, and obtaining a crude product; step 5, filtering the crude product obtained in the step 4 by using a filter, and obtaining a filtered product as a finished product; And 6, sampling and checking the finished product, weighing and packaging the qualified finished product and warehousing the qualified finished product.
2. 2. A method for preparing the slurry oil scale inhibitor of the catalytic cracker according to claim 1, which comprises the following specific steps: Step 1, a dispersing agent is pumped into a preheater by a vacuum pump to be preheated, and the preheated dispersing agent is obtained after the dispersing agent is preheated to at least 25 ℃; step 2, pumping the preheated dispersing agent and the solvent obtained in the step 1 into a batching tank by utilizing a vacuum pump to mix for 15min to obtain a mixed material; Step 3, pumping the mixed material obtained in the step2 into a reaction kettle by utilizing a vacuum pump to stir for 30min to obtain a stirred material; Step 4, pumping the stirred materials obtained in the step 3 into a reaction pot by utilizing a vacuum pump, adding an anti-aging agent for compound stirring, wherein the stirring time is 30min, and obtaining a crude product; step 5, filtering the crude product obtained in the step 4 by using a filter, and obtaining a filtered product as a finished product; And 6, sampling and checking the finished product, weighing and packaging the qualified finished product and warehousing the qualified finished product.

Description

Oil slurry scale inhibitor for catalytic cracker and preparation method thereof Technical Field The invention relates to the field of oil slurry scale inhibition, in particular to an oil slurry scale inhibitor for a catalytic cracking device and a preparation method thereof. Background In recent years, the residuum catalytic cracking technology is increasingly popularized and popularized as a technology for deeply processing heavy oil and improving the economic benefit of refineries, and the problem of coking and scaling of catalytic cracking slurry oil is increasingly serious and common. The normal operation of the device can be seriously affected by coking and scaling of the slurry oil system, the heat transfer efficiency of the heat exchanger is reduced by the coking and scaling substances, the resistance in pipeline transportation is increased, the final temperature of slurry oil and raw material heat exchange is reduced, the steam generation amount is reduced, the energy consumption of the device is increased, the redundant heat of the slurry oil can not be taken away, and the heat balance of the system is destroyed. In severe cases, the slurry delivery system and the heat exchange system are often blocked, so that the system is stopped. One of the most economical and effective methods to date is to add a micro-additive to the process stock, the slurry scale inhibitor, to inhibit scale formation. The existing scale inhibitor has complex raw material components, complex preparation process and higher cost. For example, patent 201910504574.5, the components of which contain metal deactivator, are liable to influence ash index of slurry oil scale inhibitor, and the final scale inhibition effect is liable to be affected to a certain extent. Disclosure of Invention The invention aims to overcome the defects of the prior art, and provides the slurry oil scale inhibitor for the catalytic cracking device and the preparation method thereof, which can effectively improve the comprehensive performance of the slurry oil scale inhibitor, and the preparation process is simple and feasible and has low cost. In order to achieve the aim of the invention, the invention adopts the following technical scheme: the oil slurry scale inhibitor of the catalytic cracking device is characterized by comprising the following components in percentage by mass: 15-25% of dispersing agent; 1-5% of an anti-aging agent; 72-82% of solvent. A further improvement of the invention is that the dispersant is a T154 dispersant. The invention is further improved in that the purity of the anti-aging agent is more than 92%, and the melting point is more than or equal to 70 ℃. The invention is further improved in that the anti-aging agent is 4010 anti-aging agent. The invention is further improved in that the solvent is a mixed aromatic hydrocarbon solvent. The ashless dispersant is prepared by taking high-activity polyisobutene as a main raw material and adopting a hot addition process, and has good cleaning dispersibility and flash point of more than 180 ℃. The anti-aging agent is 4010 anti-aging agent, has good dispersibility and good thermal stability, and can effectively improve the dispersibility and thermal stability and reduce the viscosity of the system when being mixed with the T154 dispersing agent. The solvent is an additive prepared from cresol and isobutene serving as raw materials, and the solvent can be used for efficiently dispersing the effective components in the scale inhibitor into the slurry oil. The preparation method of the oil slurry scale inhibitor of the catalytic cracking device is characterized by comprising the following specific steps: Step 1, a dispersing agent is pumped into a preheater by a vacuum pump to be preheated, and the preheated dispersing agent is obtained after the dispersing agent is preheated to at least 25 ℃; step 2, pumping the preheated dispersing agent and the solvent obtained in the step 1 into a batching tank by utilizing a vacuum pump to mix for 15min to obtain a mixed material; step 3, pumping the mixed material obtained in the step2 into a reaction kettle by utilizing a vacuum pump to perform slurry stirring for 30min to obtain a stirred material; Step 4, pumping the stirred materials obtained in the step 3 into a reaction pot by utilizing a vacuum pump, adding an anti-aging agent for compound stirring, wherein the stirring time is 30min, and obtaining a crude product; step 5, filtering the crude product obtained in the step 4 by using a filter, and obtaining a filtered product as a finished product; And 6, sampling and checking the finished product, weighing and packaging the qualified finished product and warehousing the qualified finished product. The different feeding sequences have a certain influence on the usability of the scale inhibitor, and the oil slurry scale inhibitor prepared according to the feeding sequences has low solidifying point and low viscosity after being added into oil