Antiscale composition and application thereof

A composition and anti-scaling technology, which can be used in the treatment of equipment corrosion/scaling inhibition, hydrocarbon oil treatment, petroleum industry, etc. It can solve problems such as aggravating equipment corrosion, poor high temperature resistance, and negative impacts of decomposition products during processing, and achieve descaling High efficiency and good high temperature resistance

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the sulfur content in crude oil is high, sulfur-containing compounds and acidic components aggravate equipment corrosion, resulting in the formation of a large amount of inorganic coke scale; metal ions in inorganic coke scale can further promote the oxidation of oil at high temperature to form organic coke scale, The adhesion of organic coke scale in turn intensifies the formation of inorganic coke scale; in addition, the sulfur-containing and nitrogen-containing compounds in oil are prone to free radical oxidation under the action of oxygen, resulting in colloid and carbon deposits, resulting in oil The formation mechanism of coke scale in processing equipment is relatively complicated, the high temperature resistance is poor, and the decomposition products have a negative impact on the processing process and catalyst

Method used

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  • Antiscale composition and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1 synthetic polyisobutylene o-cresol

[0050] In a 500ml four-necked flask equipped with a stirrer, a thermometer, a condenser and a dropping funnel, add 34.93g (0.323mol) of o-cresol, 6.88g (0.048mol) of boron trifluoride ether catalyst, and 100ml of n-hexane solvent React with 161.61g (0.162mol) of polyisobutylene (Mn=1000) at 80°C for 2h. After the reaction, the reaction mixture was washed once with 5% potassium hydroxide solution by mass fraction, and washed with hot water to neutrality to remove the catalyst, and then the solvent and unreacted o-cresol were distilled off under reduced pressure. The hydroxyl value of the synthetic product polyisobutylene o-cresol is 53.49 mg / g. For the determination of hydroxyl value, refer to the acetic anhydride method in GB / T7383-2007.

[0051] An example reaction is as follows:

[0052]

Embodiment 2

[0054] The polyisobutylene o-cresol 47.16g (0.045mol) that makes in embodiment 1 is added in the 500ml four-necked beaker that stirrer, thermometer and separator are equipped with under nitrogen protection, then add 2.70g (0.045mol) ethylenediamine, 3.83g (0.047mol) of formaldehyde, and 47ml of toluene was added as a reaction solvent. After reacting at 80°C for 1.5h, the temperature was cooled to room temperature, and 4.97g (0.0225mol) of 4-nonylphenol, 3.83g (0.047mol) formaldehyde, reacted at 70°C for 1h. After the reaction was completed, the solvent and a small amount of water generated were distilled off under reduced pressure to obtain the final Mannich base detergent TN-1. An example reaction is as follows:

[0055]

Embodiment 3

[0057] The polyisobutylene o-cresol 44.92g (0.043mol) that makes in embodiment 1 is added in the 500ml four-necked beaker that stirrer, thermometer and separator are equipped with under nitrogen protection, then add 4.64g (0.043mol) Diethylenetriamine, 3.65g (0.045mol) formaldehyde, and 47ml of xylene was added as a reaction solvent, after reacting at 90°C for 1.5h, the temperature was cooled to room temperature, and 5.64g (0.0215mol) of 4-dodecylphenol was added , 3.65g (0.045mol) formaldehyde, reacted at 70°C for 1h. After the reaction was completed, the solvent and a small amount of water generated were distilled off under reduced pressure to obtain the final Mannich base detergent TN-2. Refer to Example 2 for an exemplary reaction scheme.

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Abstract

The invention provides an antiscale composition and application thereof. The antiscale composition comprises a Mannich base detergent agent and a diluter, wherein the diluter is hydrocarbons of which the boiling point is 180-410 DEG C; and the Mannich base detergent agent accounts for 1-30 wt% of the whole antiscale composition. The preparation method of the Mannich base detergent agent comprises the following steps: (1) in the presence of an alkylation reaction catalyst, reacting phenol and / or mono-ortho-alkylphenol with polyolefin, and collecting the alkylate; (2) carrying out Mannich reaction on the alkylate obtained in the step (1) with polyene polyamine and aldehyde to obtain an intermediate product; and (3) carrying out secondary Mannich reaction on the intermediate product in the step (2) with p-alkylphenol compounds and aldehyde, and collecting to obtain the final Mannich base detergent agent. The antiscale composition has the advantages of high descaling efficiency and favorable high temperature resistance, and is suitable for processing high-acid, high-sulfur and inferior crude oil.

Description

technical field [0001] The invention belongs to the field of petroleum processing, and in particular relates to preventing or reducing the generation of fouling in hydrocarbon oil transmission pipelines, heat exchangers and other equipment during petroleum refining and processing. Background technique [0002] As the quality of crude oil continues to deteriorate, the hydrocracking unit that uses vacuum gas oil as the main raw material also gradually deteriorates, which brings some new problems to the normal operation of the hydrocracking unit. Among them, the fouling of the high-pressure heat exchanger causes the heat exchange efficiency to drop, so that the temperature of the raw material after heat exchange cannot meet the design requirements. Only by increasing the load of the heating furnace, this will increase the energy loss of the device, and in severe cases, the bed temperature of the reactor in the device will be reduced. The distribution is seriously deviated from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G75/00C08F10/00C08F8/32
Inventor 么佳耀辛世豪赵敏黄作鑫段庆华
Owner CHINA PETROLEUM & CHEM CORP
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