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Ferrous sulfide dirt neutral complexing cleaning agent and preparation method thereof

A ferrous sulfide and cleaning agent technology, applied in chemical instruments and methods, detergent compounding agents, non-ionic surface active compounds, etc., can solve the problems of pickling corrosion, pitting corrosion, pitting corrosion, and unevenness of metal surfaces. Achieve the effects of facilitating equipment maintenance, reducing energy consumption, and improving mass and heat transfer efficiency

Active Publication Date: 2013-07-10
GANSU HEIMA PETROCHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Hydrogen sulfide gas forms hydrogen sulfide hydration solution in the pickling solution. This hydration solution is extremely corrosive, which can invalidate the pickling corrosion inhibitor, cause overall corrosion of steel, pit corrosion and pitting corrosion can occur, and corrode the metal surface. The unevenness of the surface will cause serious pickling corrosion accidents

Method used

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  • Ferrous sulfide dirt neutral complexing cleaning agent and preparation method thereof

Examples

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Embodiment 1

[0042] Example 1 First, the raw materials were weighed according to the following components and weights: 6kg sodium gluconate, 9kg sodium salicylate, 22kg ammonium diethylenetriaminepentaacetate, 22kg sodium edetate, 43kg acrylic acid-itaconic acid Copolymer, 30kg sodium polyepoxysuccinate, 14kg sodium p-hydroxyphenylacetate, 5kg triethanolamine, 5kg hydrogen peroxide, 0.1kg sodium lauryl sulfate, 0.1kg polydimethyl silicone oil and 42kg water;

[0043] Then, above-mentioned raw material is prepared into ferrous sulfide dirt neutral complex cleaning agent according to the following steps:

[0044] 1. Under stirring, add ammonium diethylenetriaminepentaacetate, sodium ethylenediaminetetraacetate, acrylic acid-itaconic acid copolymer and sodium polyepoxysuccinate into the water in sequence; during the addition process, control the temperature not to exceed 25 ℃, react at room temperature for 60 minutes after adding the materials; then raise the temperature to 30°C, react for an...

Embodiment 2

[0047] Example 2 First, the raw materials were weighed according to the following components and weights: 8kg sodium gluconate, 7kg sodium salicylate, 24kg ammonium diethylenetriaminepentaacetate, 20kg sodium edetate, 46kg acrylic acid-itaconic acid Copolymer, 28kg sodium polyepoxysuccinate, 12kg sodium p-hydroxyphenylacetate, 6kg triethanolamine, 7kg hydrogen peroxide, 0.2kg sodium lauryl sulfate, 0.18kg polydimethyl silicone oil and 45kg water;

[0048] Then, above-mentioned raw material is prepared into ferrous sulfide dirt neutral complex cleaning agent according to the following steps:

[0049] 1, pH is adjusted to 7 with sodium hydroxide, all the other are with embodiment 1;

[0050] 2, with embodiment 1;

[0051] 3, with embodiment 1.

Embodiment 3

[0052] Example 3 First, the raw materials were weighed according to the following components and weights: 5kg sodium gluconate, 10kg sodium salicylate, 20kg ammonium diethylenetriaminepentaacetate, 23kg sodium edetate, 40kg acrylic acid-itaconic acid Copolymer, 25kg sodium polyepoxysuccinate, 15kg sodium p-hydroxyphenylacetate, 7kg triethanolamine, 3kg hydrogen peroxide, 0.15kg sodium lauryl sulfate, 0.15kg polydimethyl silicone oil and 40kg water;

[0053] Then, above-mentioned raw material is prepared into ferrous sulfide dirt neutral complex cleaning agent according to the following steps:

[0054] 1, pH is adjusted to 6 with sodium hydroxide, all the other are with embodiment 1;

[0055] 2, with embodiment 1;

[0056] 3, with embodiment 1.

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Abstract

The invention relates to an equipment cleaning agent which is used in the field of petroleum and chemical industry, in particular to a ferrous sulfide dirt neutral complexing cleaning agent which is used for washing a synthesized ammonia low-temperature methanol washing unit system in the petroleum chemical industry and the coal chemical industry. The ferrous sulfide dirt neutral complexing cleaning agent is prepared from the following raw materials in parts by weight: 5 to 8 parts of sodium gluconate, 7 to 11 parts of sodium salicylate, 20 to 26 parts of gadoliniam diethylene triamine pentaacetic acid, 20 to 26 parts of sodium ethylene diamine tetracetate, 40 to 46 parts of propenoic acid-itaconic acid copolymer, 25 to 32 parts of disodium polyepoxysuccinicate, 12 to 15 parts of sodium hydroxyphenylace, 3 to 7 parts of triethanolamine, 3 to 7 parts of hydrogen peroxide, 0.1 to 0.3 part of lauryl sodium sulfate, 0.1 to 0.3 part of polydimethyl siloxane fluid and 40 to 45 parts of water. The ferrous sulfide dirt neutral complexing cleaning agent is free from generating hydrogen sulfide when cleaning the ferrous sulfide dirt and corroding the equipment and has strong capacity for complexing the iron ions, the removal speed is fast, the decontamination rate is more than 98 percent, the neutralization and passivation are unnecessary to carry out after the chemical washing, and the equipment can be put into operation immediately.

Description

technical field [0001] The invention relates to an equipment cleaning agent suitable for use in the fields of petroleum and chemical industry, in particular to a ferrous sulfate dirt used for cleaning ferrous sulfate dirt produced by synthetic ammonia low-temperature methanol washing unit systems in petrochemical and coal chemical industries The neutral complex cleaning agent for ferrous sulfide dirt, the present invention also provides the preparation method of the neutral complex cleaning agent for ferrous sulfide dirt. Background technique [0002] Synthetic ammonia low-temperature methanol washing unit system equipment and pipelines are in operation, producing ferrous sulfide (FeS) scale. Ferrous sulfide dirt can spontaneously ignite, and undergo oxidation-reduction reactions with water and air, release heat, and release flammable and toxic hydrogen sulfide (H 2 S) gas, which is extremely unfavorable to equipment maintenance and has a major safety hazard. Ferrous sulfi...

Claims

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Application Information

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IPC IPC(8): C11D1/83C11D3/22C11D3/20C11D3/33C11D3/37C11D3/39C11D3/60
Inventor 刘志新
Owner GANSU HEIMA PETROCHEM ENG
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