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Environment-friendly efficient ferrous sulfide passivant and preparation method thereof

An environmentally friendly ferrous sulfide technology, applied in the field of fine chemicals, can solve problems such as ferrous sulfide spontaneous combustion accidents, damaged equipment, and large accumulations of ferrous sulfide, so as to prolong the service life, avoid the loss of fluid kinetic energy, and The effect of scale inhibition ability

Active Publication Date: 2016-12-14
南京南炼宏泰技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the shutdown process such as maintenance, the ferrous sulfide reacts exothermicly with the oxygen in the air, and the heat released will cause high temperature and damage the equipment if there is no way to release and transmit it in time.
Especially in towers and containers with many internal components such as fillers and trays, the accumulation of ferrous sulfide is large, and ferrous sulfide spontaneous combustion accidents are extremely prone to occur

Method used

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  • Environment-friendly efficient ferrous sulfide passivant and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Step 1: first feed nitrogen into the mixer, and empty the mixer, add 1kg fatty alcohol polyoxyethylene ether sodium sulfate, 1kg methyloctylacetaldehyde, 2kg methylnonacetaldehyde, 2kg amine oxide, 1kg itacan The acid copolymer is itaconic acid-sodium propylene sulfonate-sodium hypophosphite copolymer, 1kg itaconic acid-ethyl acrylate-acrylic acid copolymer and 89kg water are slowly added into the mixer, start the mixer, record the mixing time, and start the mixer to fatty alcohol polyoxyethylene ether sodium sulfate, methyloctylacetaldehyde, methylnonacetaldehyde, amine oxide, itaconic acid-sodium propylene sulfonate-sodium hypophosphite copolymer and itaconic acid-ethyl acrylate-acrylic acid It takes 15 to 30 minutes for all the copolymers to be fed;

[0045] Step 2: Slowly add 1kg of sodium dodecylbenzenesulfonate and 0.5kg of sodium carbonate under normal pressure, and control the maximum reaction temperature to be less than 75°C. When the reaction temperature rises...

Embodiment 2

[0049] Step 1: first feed nitrogen into the mixer, and empty the mixer, add 2kg fatty alcohol polyoxyethylene ether sodium sulfate, 1.7kg methyl nonacetaldehyde, 3.3kg 7-hydroxy-3,7-dimethyl octane Add aldehyde, 5kg amine oxide, 1kg itaconic acid-sodium propylene sulfonate-sodium hypophosphite copolymer, 2kg itaconic acid-ethyl acrylate-acrylic acid copolymer and 77kg water slowly into the mixer, start the mixer, record the mixing time, From the start of the mixer to the copolymerization of fatty alcohol polyoxyethylene ether sodium sulfate, methylnonacetaldehyde, 7-hydroxy-3,7-dimethyloctylaldehyde, amine oxide, itaconic acid-sodium propylene sulfonate-sodium hypophosphite It takes 15 to 30 minutes to complete the feeding of the compound and itaconic acid-ethyl acrylate-acrylic acid copolymer;

[0050] Step 2: Slowly add 2kg of sodium dodecylbenzenesulfonate and 2kg of sodium carbonate under normal pressure, and control the maximum reaction temperature to be less than 75°C. W...

Embodiment 3

[0054] Step 1: first feed nitrogen into the mixer, and empty the mixer, add 1.6kg fatty alcohol polyoxyethylene ether sodium sulfate, 1kg methyloctylacetaldehyde, 1kg methylnonacetaldehyde, 2kg7-hydroxyl-3, 7-Dimethyloctanal, 3.5kg amine oxide, 1.04kg itaconic acid-sodium propylene sulfonate-sodium hypophosphite copolymer, 1.56kg itaconic acid-ethyl acrylate-acrylic acid copolymer and 83kg water were slowly added to the mixer Inside, turn on the mixer, record the mixing time, from turning on the mixer to fatty alcohol polyoxyethylene ether sodium sulfate, methyloctylacetaldehyde, methylnonacetaldehyde, 7-hydroxy-3,7-dimethyloctylaldehyde, amine oxide 1. Itaconic acid-sodium propylene sulfonate-sodium hypophosphite copolymer and itaconic acid-ethyl acrylate-acrylic acid copolymer all need 15 to 30 minutes to complete feeding;

[0055] Step 2: Slowly add 1.4kg sodium dodecylbenzenesulfonate and 1.3kg sodium carbonate under normal pressure, and control the maximum reaction temper...

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Abstract

The invention relates to an environment-friendly efficient ferrous sulfide passivant and a preparation method thereof. The passivant comprises the following components in parts by weight: 4 parts of fatty aldehyde, 3.5 parts of disodium edetate dehydrate, 1.3 parts of sodium carbonate, 3.5 parts of amine oxide, 1.6 parts of fatty alcohol polyoxyethylene ether sodium sulphate, 1.4 parts of sodium dodecyl benzene sulfonate, 1.5 parts of an edible essence, 2.6 parts of an itaconic acid copolymer, 1.6 parts of polyquaternium, 1.4 parts of a corrosion inhibitor and 83 parts of water. The environment-friendly efficient ferrous sulfide passivant has relatively high and thorough ferrous sulfide removal efficiency and is capable of simultaneously removing malignant stinks such as hydrogen sulfide and ammonia nitrogen; besides, the passivant does not contain chloride ion, heavy metal ions such as manganese and chromium and other toxic and harmful components, has strong biodegradability and does not pollute the environment, and toxic and harmful gases such as hydrogen sulfide are not produced during the construction, so that the personal injury and the environmental pollution are avoided, the damage of equipment is avoided, the spontaneous combustion of ferrous sulfide can be effectively prevented, and hydrogen sulfide can be eliminated.

Description

technical field [0001] The invention relates to the field of fine chemicals, in particular to an environment-friendly high-efficiency ferrous sulfide passivator and a preparation method thereof. Background technique [0002] In the oil refining process, the elemental iron element in pipeline equipment is ubiquitous, which makes a series of chemical reactions between various active sulfur and elemental iron element in the process of crude oil processing, and finally accumulates in the form of ferrous sulfide in a large space and low flow rate. tower, container. The distribution of FeS in process equipment generally follows this rule: the higher the sulfur content in the medium, the more FeS corrosion products, but the equipment with a sulfur content in the medium of only a few parts per million will also spontaneously ignite FeS when it is opened. Phenomenon. The reason is not the high sulfur content in the medium, but the fine FeS corrosion products will continuously trans...

Claims

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Application Information

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IPC IPC(8): C10G75/00
CPCC10G75/00
Inventor 王选明
Owner 南京南炼宏泰技术开发有限公司
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