Anti-scaling agent used for hydrogenation plant and its preparation method and application

A technology of hydrogenation unit and antiscalant, which is applied in the direction of treatment equipment corrosion/scaling inhibition, petroleum industry, refining to remove heteroatoms, etc. Possess problems such as polymerization inhibition to achieve the effects of preventing deposition, non-toxic and harmless environment, and reducing bed pressure drop

Active Publication Date: 2008-09-17
LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] (1) Most antiscalant technologies are aimed at fouling of raw material heat exchange systems, and there are very few antiscalants specifically for hydrogenation unit reactors
[0011] (2) The cleaning oil technology for the hydrogenation unit can only be used after the unit is shut down, and the start-up period of the unit cannot be extended
[0012] (3) The existing bed scale inhibitors have single functions and cannot simultaneously have multiple functions such as polymerization inhibition, metal passivation, and bed pressure drop reduction

Method used

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  • Anti-scaling agent used for hydrogenation plant and its preparation method and application
  • Anti-scaling agent used for hydrogenation plant and its preparation method and application
  • Anti-scaling agent used for hydrogenation plant and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The structure and preparation method of the new compound A.

[0037] 1. The structure of the new compound A

[0038]

[0039] 2. Preparation method

[0040] Place 114g (0.5mol) dodecyl salicylic acid, 134.5g (0.5mol) octadecyl primary amine and 50g xylene in a three-necked flask equipped with a thermometer, a stirrer, and a condenser tube, and heat to 80~ React at 90°C for 1 hour, filter and evaporate the solvent to obtain the new compound antiscalant A.

Embodiment 2

[0042] The structure and preparation method of the new compound B.

[0043] 1. The structure of the new compound B

[0044]

[0045] 2. Preparation method

[0046] Put 128g (0.5mol) tetradecyl salicylic acid, 91.5g (0.5mol) dodecyl primary amine and 50g aromatic hydrocarbon solvent oil (distillation range is 180~200°C) in a condenser equipped with a thermometer, agitator, In a three-neck flask, heat to 80-90°C for 1 hour, filter and evaporate the solvent to obtain the new compound antiscalant B.

Embodiment 3

[0048] The structure and preparation method of the new compound C.

[0049] 1. The structure of the new compound C

[0050]

[0051] 2. Preparation method

[0052] Put 142g (0.5mol) of hexadecyl salicylic acid, 30.5g (0.5mol) of monoethanolamine and 36g of aromatic solvent oil (distillation range 180-200°C) into a three-necked flask equipped with a thermometer, a stirrer, and a condenser , heated to 40-50°C for 1 hour, filtered and evaporated to obtain the new compound antiscalant C.

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PUM

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Abstract

The invention discloses a descaling agent used for a hydrogenation device and the preparation method and the application thereof, and solves the coking and scale deposition of the relevant equipment during the petroleum refining process, such as a hydrogenation device reactor, a heating furnace, and a heat exchanger. The general formula of the hydrogenation descaling agent is shown as the formula (1), wherein, R is C8-C20 alkyl; R2 is H, R1 is C1-C24 alkyl, alkoxy or aryl; or both of the R1 and the R2 are C1-C15 alkyl, alkoxy or aryl. Through adopting the descaling agent of the invention, not only the coking and scale deposition can be inhibited, but also the production is simple and easy, and the descaling agent is harmless to the environment.

Description

technical field [0001] The invention belongs to a scale inhibitor for inhibiting coke scale formed in conversion hydrocarbon oil equipment, in particular to a scale inhibitor used in a hydrogenation unit and its preparation method and application. Background technique [0002] With the increasingly strict oil quality indicators and environmental protection requirements, the hydrogenation unit plays an increasingly important role in the oil processing process. However, as the crude oil becomes heavier and worse, the coking and corrosion of the related equipment of the hydrogenation unit become more and more serious. The corrosion product FeS and the coke generated by the polymerization of unstable substances tend to form deposits in the heat exchanger of the hydrogenation raw material and the catalyst bed of the reactor. dirt. Fouling deposits on the heat exchanger of the raw material system, resulting in reduced heat transfer efficiency and increased energy consumption; sev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/02C10G75/04
Inventor 杨莹潘延民郭鹏
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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