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Coking scaling inhibitor and its preparation and application

An inhibitor and coke scale technology, which is applied in the treatment equipment corrosion/fouling inhibition, petroleum industry, cracking and other directions, can solve the problems of general effect and reduce generation, and achieve the effect of enhanced coke inhibition efficiency and easy production.

Inactive Publication Date: 2007-08-15
LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Sulfide-containing compounds also have metal surface modification effects. U.S. Patent No. 6,673,232 discloses the use of sulfides and hydroxylamine as an ethylene furnace coke inhibitor. Sulfides can passivate metals and terminate free radical polymerization reactions, and can reduce CO Formation, boride can form a passivation film on the metal wall, but the effect is general

Method used

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  • Coking scaling inhibitor and its preparation and application
  • Coking scaling inhibitor and its preparation and application
  • Coking scaling inhibitor and its preparation 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] 1) First put 260 grams (2mol) of isooctyl alcohol and 100 grams of xylene into a 500ml four-necked flask equipped with a stirrer, a thermometer and a condenser. Start the stirring device and simultaneously turn on the condensed water in the condenser, then slowly add 110 grams (0.5 mol) of phosphorus pentasulfide, and when the temperature rises to 120° C., keep the temperature at a constant temperature of 0.1 MPa for 5 hours.

[0041] 2) the first step reaction product is cooled to 70 ℃, it and 100 gram xylenes are added in the flask that agitator, thermometer, condenser, water separator are housed, then slowly 85 gram (0.33mol) dioxide trioxide Antimony was added, and the reactants were kept at 70°C and 0.1Mpa for 7 hours, until no water came out in the water separator, and 1 mol of the compound of formula (3) w...

Embodiment 2

[0043] The structure and preparation method of the new compound B.

[0044] 1. The structure of the new compound B

[0045]

[0046] 2. Preparation method

[0047] 1) Put 150 grams (2mol) of n-butanol and 70 grams of xylene into a 500ml four-necked flask equipped with a stirrer, a thermometer and a condenser. Start the stirring device and turn on the condensed water of the condenser at the same time, then add 110 (0.5mol) gram of phosphorus pentasulfide, when the temperature rises to 160°C, keep the temperature at a pressure of 0.1Mpa for 4 hours.

[0048] 2) the first step reaction product is cooled to 75 ℃, and it and 70 grams of xylene are added in the flask that agitator, thermometer, condenser, water trap are equipped with, then slowly 37 grams (0.25mol) tin dioxide Adding, keeping the reactant at 75° C., reacting for 4 hours under the condition of 0.1 Mpa, until no water comes out in the water separator, and 1 mol of the compound of formula (4) is generated.

Embodiment 3

[0050] The structure and preparation method of the new compound C.

[0051] 1. The structure of the new compound C

[0052]

[0053] 2. Preparation method

[0054] 1) Put 186 grams (1mol) of dodecanol and 90 grams of xylene into a 500ml four-necked flask equipped with a stirrer, a thermometer and a condenser. Start the stirring device and open the condensed water of the condenser at the same time, then add 27 grams (0.25mol) of phosphorus pentasulfide, and when the temperature is raised to 150° C., keep the temperature at a pressure of 0.1 MPa for 5 hours.

[0055] 2) the first step reaction product is cooled to 80 ℃, it and 90 gram xylenes are added in the flask that agitator, thermometer, condenser, water trap are equipped with, then slowly 46 gram (0.16mol) dioxide trioxide Lanthanum was added, and the reactants were kept at 80° C. and 0.1 Mpa for 6 hours until no water came out in the separator, and 0.5 mol of the compound of formula (5) was generated.

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Abstract

The invention discloses a method to prepare coking dirty depressant and application, which is characterized by the following: it compounds with constitutional formula as formula (1); R1 and R2 is C1-C12 hydrocarbyl group; n is intact number at 2-6; M is elements of Ce, La, SnSb, Al, Bi, In or Mo; A is elements of O or S. This product possesses merits of good effect, good stability, wide range of temperature A and simple producing craft.

Description

technical field [0001] The invention belongs to a coke scale inhibitor for inhibiting the formation of coke scale in conversion hydrocarbon oil equipment, in particular to a coke scale inhibitor for inhibiting coke formation in ethylene cracking furnace tubes and its preparation method and application. Background technique [0002] In the process of ethylene production, when raw oil is cracked to generate small molecular hydrocarbons, coking reaction is inevitable. Coking causes coke deposition in cracking furnace tubes and quenching boilers, which not only increases the thermal resistance of furnace tube walls, reduces heat transfer coefficient, and reduces energy consumption. In addition, due to the coking of the furnace tube, it must be shut down periodically to clean the coke. Frequent shutdowns for coking and cleaning will result in a decrease in processing capacity and an increase in energy consumption, which seriously affects the economic benefits of the device. . In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G75/00C10G9/16
Inventor 杨莹潘延民刘志龙杨金辉郭鹏田淑梅
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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