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Sulfide scale descaling and deodorizing passivation agent composition and preparation method thereof

A technology of passivating agent and sulfide, which is applied in the field of chemical cleaning agents, can solve the problems of metal surface corrosion, combustion explosion, and foul smell, and achieve the effects of saving maintenance time, fast descaling speed, and avoiding corrosion

Active Publication Date: 2019-11-22
GANSU HEIMA PETROCHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] H generated during pickling 2 S gas, not only has a foul smell, but also is poisonous, and is flammable and explosive. The residual H in the equipment 2 S gas, prone to poisoning and combustion explosion accidents
[0006] Hydrogen sulfide (H 2 S) The gas forms a hydration solution of hydrogen sulfide in the pickling solution. This hydration solution is extremely corrosive and can invalidate the pickling corrosion inhibitor, causing overall corrosion of steel, pitting corrosion and pitting corrosion, which will damage the metal surface. The corrosion is uneven, causing serious pickling corrosion accidents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1; Take raw material by following component and weight: urotropine 7kg, sodium citrate 5kg, dilauroyl peroxide 4kg, sodium carbonate 18kg, sodium silicate 4kg, dodecanoyl aspartic acid 8kg , Potassium oxalate 5kg, polyethylene glycol 4kg, alkylphenol polyoxyethylene ether 4kg, dilauroyl tartrate 7kg, sulfosuccinic acid 10kg, sodium methacrylate 2kg, lauryl amine 7kg, sodium carboxylate 12kg, Hydroxyethylethylenediamine 3kg, sodium cetyl sulfate 5kg.

[0030] According to the following steps, the raw materials of the above-mentioned weight proportions are prepared into a sulfide scale descaler deodorization passivator composition:

[0031] 1. 4kg of polyethylene glycol, 4kg of alkylphenol polyoxyethylene ether, 10kg of sulfosuccinic acid and 7kg of lauryl amine are stirred in the reactor, stirring speed is 120 rev / min, stirring time is 40 minutes, and after stirring to uniform, Homogeneous paste.

[0032] 2. 8kg of dodecanoyl aspartic acid, 5kg of potassium ...

Embodiment 2

[0035] Embodiment 2; Take by weighing raw material by following components and weight: urotropine 5kg, sodium citrate 7kg, dilauroyl peroxide 6kg, sodium carbonate 16kg, sodium silicate 5kg, dodecanoyl aspartic acid 10kg , Potassium oxalate 6kg, polyethylene glycol 3kg, alkylphenol polyoxyethylene ether 5kg, dilauroyl tartrate 7kg, sulfosuccinic acid 11kg, sodium methacrylate 2kg, lauryl amine 8kg, sodium carboxylate 10kg, Hydroxyethylethylenediamine 4kg, sodium cetyl sulfate 4kg.

[0036] According to the following steps, the raw materials of the above-mentioned weight proportions are prepared into a sulfide scale descaler deodorization passivator composition:

[0037] 1. 3kg of polyethylene glycol, 5kg of alkylphenol polyoxyethylene ether, 11kg of sulfosuccinic acid and 8kg of lauryl amine are stirred in the reactor, stirring speed is 150 rev / min, stirring time is 30 minutes, and after stirring to uniform, Homogeneous paste.

[0038] 2. Mix 10 kg of dodecanoyl aspartic aci...

Embodiment 3

[0041] Embodiment 3; Take by weighing raw material by following components and weight: urotropine 8kg, sodium citrate 5kg, dilauroyl peroxide 3kg, sodium carbonate 17kg, sodium silicate 3kg, dodecanoyl aspartic acid 9kg , Potassium oxalate 7kg, polyethylene glycol 5kg, alkylphenol polyoxyethylene ether 5kg, dilauroyl tartrate 6kg, sulfosuccinic acid 9kg, sodium methacrylate 3kg, lauryl amine 9kg, sodium carboxylate 11kg, Hydroxyethylethylenediamine 2kg, sodium cetyl sulfate 6kg.

[0042] According to the following steps, the raw materials of the above-mentioned weight proportions are prepared into a sulfide scale descaler deodorization passivator composition:

[0043] 1. 5kg of polyethylene glycol, 5kg of alkylphenol polyoxyethylene ether, 9kg of sulfosuccinic acid and 9kg of lauryl amine are stirred in the reaction kettle, stirring speed is 150 rev / min, stirring time is 35 minutes, and after stirring to uniform, Homogeneous paste.

[0044] 2. Mix 9kg of dodecanoyl aspartic ...

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Abstract

The invention discloses a descaling and deodorant passivator composition for sulfide scale. The passivator is made of, by weight, 5-8 parts of urotropine, 4-7 parts of sodium citrate, 3-6 parts of lauroyl peroxide, 16-20 parts of sodium carbonate, 3-5 parts of sodium silicate, 9-11 parts of dodecanoyl aspartic acid, 4-7 parts of potassium sorbate, 3-5 parts of polyethylene glycol, 3-5 parts of alkylphenol ethoxylates, 6-9 parts of dilauryl tartrate, 9-11 parts of sulfosuccinic acid, 1-3 parts of sodium methacrylate, 6-9 parts of lauramine, 10-14 parts of sodium carboxylate, 2-4 parts of hydroxyethyl ethylenediamine and 4-6 parts of sodium cetyl sulfate. The descaling and deodorant passivator composition for sulfide scale is used for descaling and deodorization of ferrous sulfide scale, sulfur-containing dirt, organic material scale and asphalt scale generated in the production process of petrochemical industry, mine and metallurgy industry; while the descaling is being carried out, a sulfur-containing wastewater and a waste gas can be deodorized and carried out passivation treatment; and the passivation treatment is not needed after the descaling. The method has the advantages thatthe removal speed of FeS scale is high, and the descaling rate is larger than 98% in 4 hours.

Description

technical field [0001] The invention belongs to the technical field of chemical cleaning agents, and in particular relates to a sulfide scale removal, deodorization and passivation agent composition, and also relates to a preparation method of a sulfide scale removal, deodorization and passivation agent composition. Background technique [0002] Ferrous sulfide (FeS) scale is easily generated during operation of process system equipment and pipelines in refineries, fertilizer plants and coal chemical industry. FeS scale can spontaneously combust, undergo oxidation-reduction with water and air, release heat, and release flammable and toxic hydrogen sulfide (H 2 S) gas and sulfur dioxide (SO 2 ) gas, which is extremely unfavorable for equipment maintenance and has a major safety hazard. When FeS scale is formed in the production system, the inner diameter of the tower equipment, heat exchangers and pipelines will be blocked or the pore diameter will become smaller, resulting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/19C23C22/62
CPCC23C22/62C23G1/19
Inventor 刘音希赵丽萍刘志新
Owner GANSU HEIMA PETROCHEM ENG
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