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A kind of scale inhibitor for refinery heat exchanger and preparation method thereof

A technology of heat exchangers and scale inhibitors, which is applied in the direction of equipment corrosion/scaling inhibition, hydrocarbon oil treatment, petroleum industry, etc. It can solve the problems affecting the finish of equipment and pipelines, corrosion of equipment and pipelines, and influence of finish, etc., to achieve good Effects of biodegradability, adhesion inhibition, and extension of scale inhibition period

Active Publication Date: 2019-03-01
安徽卓远化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the nature of the raw material and the processing temperature are determined by the processing technology (cannot be changed). Due to the characteristics of oil processing, it is easy to corrode the equipment and pipelines. After corrosion, the smoothness will be affected, so it is easy to scale. Affects the smoothness of equipment and pipelines, making it easier to scale and vicious circle

Method used

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  • A kind of scale inhibitor for refinery heat exchanger and preparation method thereof
  • A kind of scale inhibitor for refinery heat exchanger and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0017] A scale inhibitor for heat exchangers in refineries, made of the following percentages: 12% ashless dispersant, 13% 105 detergent, 1.8% passivator, 3.2% antioxidant, 4% imidazoline, solvent oil margin.

[0018] Among them, the ashless dispersant uses T154 ashless dispersant, the 105 detergent uses T105 synthetic calcium sulfonate detergent with a medium alkali value, the passivator uses 1201 metal passivator, and the antioxidant uses T501 antioxidant.

[0019] The imidazoline adopts oil-soluble imidazoline, and the preparation steps of oil-soluble imidazoline are as follows: weigh oleic acid and polyamine according to a certain proportion and blend them, stir and heat at 150°C for 1.2h, then vacuumize, and continue at 220°C Insulate and react for 1.8 hours, then cool to 70°C, slowly add 0.8 times the volume of ethylene oxide alcohol solution under stirring conditions, stir and cool to room temperature, then stir under water bath conditions for 0.5 hours, and cool to obt...

Embodiment 2

[0022] A scale inhibitor for heat exchangers in refineries, made of the following percentages: 14% ashless dispersant, 12% 105 detergent, 2% passivator, 3.5% antioxidant, 4.5% imidazoline, solvent oil margin.

[0023] Among them, the ashless dispersant uses T154 ashless dispersant, the 105 detergent uses T105 synthetic calcium sulfonate detergent with a medium alkali value, the passivator uses 1201 metal passivator, and the antioxidant uses T501 antioxidant.

[0024] The imidazoline adopts oil-soluble imidazoline, and the preparation steps of oil-soluble imidazoline are as follows: Weigh oleic acid and polyamine according to a certain proportion and blend, stir and heat at 150°C for 1.4h, then vacuumize, and continue at 230°C Insulate and react for 2.1 hours, then cool to 70°C, slowly add 1.2 times the volume of ethylene oxide alcohol solution under stirring conditions, stir and cool to room temperature, then stir for 1 hour under water bath conditions, and cool to obtain oil-...

Embodiment 3

[0027] A scale inhibitor for heat exchangers in refineries, made of the following percentages: 13% ashless dispersant, 10% 105 detergent, 1.7% passivator, 4% antioxidant, 6% imidazoline, solvent oil margin.

[0028] Among them, the ashless dispersant uses T154 ashless dispersant, the 105 detergent uses T105 synthetic calcium sulfonate detergent with a medium alkali value, the passivator uses 1201 metal passivator, and the antioxidant uses T501 antioxidant.

[0029] The imidazoline adopts oil-soluble imidazoline, and the preparation steps of oil-soluble imidazoline are as follows: Weigh oleic acid and polyamine according to a certain proportion and blend, stir and heat at 150°C for 1.5h, then vacuumize, and continue at 220°C Insulate and react for 2.2 hours, then cool to 70°C, slowly add 1.4 times the volume of ethylene oxide alcohol solution under stirring conditions, stir and cool to room temperature, then stir for 1 hour under water bath conditions, and cool to obtain oil-so...

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Abstract

The invention provides a scale inhibitor for a refinery plant heat exchanger and a preparation method thereof. The scale inhibitor is prepared from, by percentage, 10-15% of ashless dispersant, 10-15% of 105 detergent, 1.5-2% of passivator, 3-4% of antioxidant, 4-6% of imidazoline and the balance solvent oil. The scale inhibitor can form a firm protective film on the surface of the heat exchanger by the adding of oil soluble imidazoline modified by ethylene oxide addition, adhesion of dirt is effectively inhibited, the scale inhibitor has good biodegradability, is environmentally friendly and safe and improves a scale inhibition effect, and the scale inhibition rate reaches 90-95%. An under-deposit corrosion problem of a device and a pipeline is solved, and the effective scale inhibition duration is prolonged by twice or above.

Description

technical field [0001] The invention relates to the technical field of scale inhibitors and their preparation, in particular to a scale inhibitor for heat exchangers in refineries and a preparation method thereof. Background technique [0002] In recent years, with the change of catalytic cracking raw oil and the deepening of processing technology, fouling and coking of catalytic cracking oil slurry system equipment have led to a decrease in the thermal efficiency of the oil slurry heat exchanger, affecting the normal production and long-term operation of the unit, and directly Affect the safe operation of the equipment, and in serious cases cause the device to be forced to stop production. Refining workers have proposed a series of solutions to the scaling problem from different perspectives such as equipment, process, and operation, such as reducing the temperature at the bottom of the fractionation tower, reducing the residence time, increasing the flow rate of the oil sl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G75/00
CPCC10G75/00
Inventor 范啸樊继利张洁邵至央缪淼
Owner 安徽卓远化工科技有限公司
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