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Coke inhibitor of high-temperature refining equipment

A high-temperature equipment, petroleum refining technology, applied in the petroleum industry, cracking, non-catalytic thermal cracking and other directions, can solve problems such as decomposition and corrosion of phosphate esters, and achieve the effects of improved coke inhibition effect, easy production and stable performance.

Inactive Publication Date: 2005-12-28
张喜文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] From the above patents, it can be seen that the suppression of coking of equipment related to high temperature processes mainly starts with metal surface modification and termination of free radical chain reactions. Metal surface modifiers are commonly used borides, organic sulfides, phosphates or phosphates, among which Phosphate esters have the most obvious effect, but phosphate esters are prone to corrosion after decomposition. Derivatives of phosphate ester amine salts have not appeared in previous patents as coking inhibitors.

Method used

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  • Coke inhibitor of high-temperature refining equipment
  • Coke inhibitor of high-temperature refining equipment
  • Coke inhibitor of high-temperature refining equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take preparation 120g product of the present invention as example, used raw material and proportioning thereof are as follows:

[0041] Phosphorothioate Alkylbenzene Sulfonate Diamine Salt 89g

[0042] N,N'-di-sec-butyl-p-phenylenediamine 6g

[0043] 4-tert-butylcatechol 5g

[0044] Solvent oil 20g

[0045] A in structural formula (1) is O atom, R 1 for H, R 2 for C 8 Hydrocarbyl, R 3 for C 6 Hydrocarbyl, R 4 for C 12 of hydrocarbon groups.

[0046] Its preparation method is as follows:

[0047] Mix phosphorothioate alkylbenzenesulfonic acid diamine salt, N,N'-di-sec-butyl-p-phenylenediamine, p-tert-butylcatechol and solvent oil in a beaker according to the weight ratio, and heat to 60~ Stir at 70°C for 30-60 minutes to obtain a coking retarder for high-temperature equipment in petroleum refining.

Embodiment 2

[0049] Take preparation 120g product of the present invention as example, used raw material and proportioning thereof are as follows:

[0050] Phosphorothioate Alkylbenzene Sulfonate Diamine Salt 75g

[0051] N,N'-di-sec-butyl-p-phenylenediamine 15g

[0052] 4-tert-butylcatechol 10g

[0053] Solvent oil 20g

[0054] A in structural formula (1) is O atom, R 1 for C 1 Hydrocarbyl, R 2 for C 1 Hydrocarbyl, R 3 for C 2 Hydrocarbyl, R 4 for C 12 of hydrocarbon groups.

[0055] Its preparation method is identical with embodiment 1.

Embodiment 3

[0057] Take preparation 120g product of the present invention as example, used raw material and proportioning thereof are as follows:

[0058] Phosphorothioate Alkylbenzene Sulfonate Diamine Salt 98g

[0059] N,N'-di-sec-butyl-p-phenylenediamine 1g

[0060] p-tert-butylcatechol 1g

[0061] Solvent oil 20g

[0062] A in structural formula (1) is O atom, R 1 for C 12 Hydrocarbyl, R 2 for C 12 Hydrocarbyl, R 3 is a C10 hydrocarbon group, R 4 It is a C12 hydrocarbon group.

[0063] Its preparation method is identical with embodiment 1.

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PUM

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Abstract

A coking inhibitor of high-temperature for petroleum refining consists of thiophosphoric acid alkyl benzene monosulfonic acid bisamine salt 75í½98wt%, antioxidant 1í½15wt%, polymerization inhibitor 1í½10wt% and organic solvent 20wt%. Antioxidant is hydroquinone or 4,4-di-2-ethylhexylphosphine oxide or 2,6-di-tert.-butyl-p-cresol or N, N,-di-secondary-ursol or phenyl-alpha-naphthylamine, polymerization inhibitor is benzoquinone or p-tert-butyloxophenic acid, and organic solvent is xylene or diesel or kerosene or solvent oil. Its advantages include simple process, and good coke-inhibiting effect and stability. It can be used for crude oil distillation, catalytic crack and inhibition delay coking heater.

Description

technical field [0001] The invention belongs to the technical field of hydrocarbon oil cracking, and in particular relates to preventing or removing fouling in pipes or coils with or without accessories. technical background [0002] With the continuous deepening of the trend of petroleum heavy quality, the raw materials used in petroleum refining and petrochemical processing gradually become heavier and worse. The weight and deterioration of raw oil brings great difficulties to petroleum refining and petrochemical processing, such as catalytic cracking, residual oil hydrotreating, hydrocracking, crude oil distillation, delayed coking, visbreaking and cracking to ethylene and other devices Some equipment, especially related equipment in the high-temperature process such as coking heating furnace tubes, catalytic cracking large oil and gas pipelines, ethylene cracking furnaces, etc., are very easy to form coke scale. Coking scale will reduce the thermal efficiency of the heat...

Claims

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Application Information

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IPC IPC(8): C10G9/16
Inventor 张喜文丁智刚李谦定何力
Owner 张喜文
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