High-temperature-resistant oil slurry scale inhibitor

A technology of antiscalant and high temperature resistance, which is applied in the petroleum industry, treatment of hydrocarbon oil, treatment of equipment corrosion/inhibition of fouling, etc. It can solve the problems of affecting the life of catalytic cracking catalysts, the use effect is not obvious, and the price of antiscalants is expensive. Achieve the effects of inhibiting coking and scaling, inhibiting condensation and dehydrogenation reactions, and good dispersion effect

Active Publication Date: 2019-09-06
山东京博众诚清洁能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, different methods will be selected according to the specific conditions during the processing of the device, but generally speaking, these methods are difficult to implement and the cost is high, while the use of oil slurry antiscalant is not only low in cost, but also easy to operate, and has been obtained. wide application
At present, for refineries with harsh processing conditions, oil slurry scale inhibitors of foreign brands are generally used. Started research and developed a high temperature oil slurry antiscalant to be used under harsh processing conditions
[0003] Existing oil slurry scale inhibitors often contain sulfur, phosphorus and metal detergents and dispersants. Oil slurry scale inhibitors are used in catalytic cracking systems, and sulfur, phosphorus and metal detergents and dispersants will increase sulfur in catalytic cracking products during use. Phosphorus and metal content, and affect the life of the catalytic cracking catalyst, the existing oil slurry antiscalant, not high temperature resistant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A high-temperature oil slurry scale inhibitor, comprising the following components in mass fraction: polyisobutylene maleic anhydride (detergent and dispersant) 7%, bis-succinimide (detergent and dispersant) 13%, 4,4-di Isooctyl diphenylamine (amine type antioxidant) 0.1%, decahydronaphthalene (hydrogen donating type antioxidant) 5%, tolyltriazole (metal deactivator) 2%, the balance is S150 aromatic hydrocarbon oil solvent . Its preparation method is as follows: first, heat the solvent to 40-60°C, then add the remaining components in proportion, and stir at 40-60°C for 30 minutes to obtain the high-temperature oil slurry scale inhibitor.

Embodiment 2

[0026] A high-temperature oil slurry scale inhibitor, comprising the following components in mass fraction: polyisobutylene maleic anhydride (detergent and dispersant) 15%, bis-succinimide (detergent and dispersant) 15%, didodecyl Diphenylamine (amine type antioxidant) 2%, tetralin (hydrogen donating type antioxidant) 2%, tolyltriazole (metal deactivator) 1%, the balance is diesel oil. The preparation method is as follows: first, heat the solvent to 40-60°C, then add the remaining components in proportion, and stir at 40-60°C for 35 minutes to obtain the high-temperature oil slurry scale inhibitor.

Embodiment 3

[0028] A high-temperature oil slurry scale inhibitor, comprising the following components in mass fractions: polyisobutylene maleic anhydride (detergent and dispersant) 20%, monosuccinimide (detergent and dispersant) 15%, styryl octyl Diphenylamine (amine type antioxidant) 5%, benzyl alcohol (hydrogen donating type antioxidant) 0.1%, thiadiazole (metal deactivator) 0.1%, and the balance is S150 aromatic hydrocarbon oil solvent. The preparation method is as follows: first, heat the solvent to 40-60°C, then add the remaining components in proportion, and stir at 40-60°C for 25 minutes to obtain the high-temperature oil slurry scale inhibitor.

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Abstract

The invention belongs to the technical field of petrochemical industry, and particularly relates to a high-temperature-resistant oil slurry scale inhibitor. The oil slurry scale inhibitor is mainly used for preventing scaling of an oil slurry system of a device and the bottom of a fractionation tower. The oil slurry scale inhibitor comprises, by mass, 10%-35% of a detergent dispersant, 0.1-5% of an amine type antioxidant, 0.1%-5% of a hydrogen supply type antioxidant, 0.1-2% of a metal passivator and the balance solvent. The oil slurry scale inhibitor has good high temperature resistance and still has good oxidation resistance at 370-420 DEG C. The detergent dispersant does not contain sulfur or phosphorus, and has good scale inhibition and scale removal effects. The freezing point of thehigh-temperature-resistant oil slurry scale inhibitor is low (<=-20 DEG C), and the storage tank of the high-temperature-resistant oil slurry scale inhibitor does not need heat insulation during the winter. When 30-200 ppm of the oil slurry scale inhibitor is added, the problem of pressure drop increasing caused by the coking of the bottom of the fractionation tower and the problem of plugging caused by scaling of an oil slurry heat exchanger, a pipeline and the like can be effectively solved; the oil slurry scale inhibitor guarantees long-term operation of the device and has great economic benefits.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a high temperature resistant oil slurry scale inhibitor Background technique [0002] As the nature of the raw oil in the catalytic unit becomes heavier and the processing conditions become more and more harsh, some FCC units in some refineries have problems such as coking on the bottom tray of the fractionation tower and fouling in the oil slurry system, resulting in frequent cleaning of the heat exchanger. There are a series of problems such as the increase of oil slurry circulation and the decrease of steam production. For this reason, after research at home and abroad, several solutions have been proposed, including improving the properties of raw materials, reducing the severity of processing, and increasing the amount of oil slurry thrown out. Generally speaking, different methods will be selected according to the specific conditions during the processing of the devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G75/04
CPCC10G75/04
Inventor 王昌朋杨云龙董双建尹博郭文娟
Owner 山东京博众诚清洁能源有限公司
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