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High-temperature corrosion inhibitor for chlorethylene convertor, preparation thereof and using method thereof

A high-temperature corrosion inhibitor and converter technology, applied in the field of corrosion inhibitors, can solve the problems of poor thermal stability and high-temperature corrosion inhibition, water pollution, corrosion inhibition, and unsatisfactory protection effects, and achieve enhanced high-temperature corrosion inhibition effect. , easily biodegradable effect

Active Publication Date: 2016-03-23
CHANGZHOU ZHONGNAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the defects and deficiencies such as poor thermal stability and high temperature corrosion inhibition performance of the existing corrosion inhibitors for vinyl chloride converters, unsatisfactory corrosion inhibition and protection effects, and easy water pollution, and provide a vinyl chloride conversion high temperature corrosion inhibitor

Method used

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  • High-temperature corrosion inhibitor for chlorethylene convertor, preparation thereof and using method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A sodium lignosulfonate 14g;

[0031] B sodium cardanol sulfonate 56g;

[0032] C deionized water 30g.

[0033] At room temperature, add the deionized water of the above weight into the mixing tank with a stirrer, start stirring, add the sodium lignosulfonate and sodium cardanol sulfonate of the above weight successively, stir for 1 hour after feeding, filter The corrosion inhibitor is produced immediately after discharge.

Embodiment 2

[0035] A sodium lignosulfonate 20g;

[0036] Magnesium Lignosulfonate 11g

[0037] B sodium cardanol sulfonate 49g;

[0038] C deionized water 20g.

[0039] At room temperature, add the deionized water of the above weight into the mixing kettle with a stirrer, start stirring, add the sodium lignosulfonate, magnesium lignosulfonate and sodium cardanol sulfonate of the above weight successively, and the feeding is completed After stirring for 1 hour, the material was filtered and discharged to obtain the corrosion inhibitor.

Embodiment 3

[0041] A sodium lignosulfonate 35g;

[0042] B sodium cardanol sulfonate 17g;

[0043] Magnesium cardanol sulfonate 18g;

[0044] C deionized water 30g.

[0045] At room temperature, add the deionized water of the above weight into the mixing kettle with a stirrer, start stirring, and add the sodium lignosulfonate, sodium cardanol sulfonate and magnesium cardanol sulfonate of the above weight successively, and the feeding is completed After stirring for 1 hour, the material was filtered and discharged to obtain the corrosion inhibitor.

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Abstract

The invention relates to a high-temperature corrosion inhibitor for a chlorethylene convertor, preparation thereof and a using method thereof, and belongs to the technical field of corrosion inhibitors. The high-temperature corrosion inhibitor is prepared by mixing 14%-56% of lignosulfonate, 14-56% of cardanol sulfonate and 5%-30% of deionized water. According to the high-temperature corrosion inhibitor, the lignosulfonate and the cardanol sulfonate adopted belong to natural source compounds, are non-toxic, and are easily degraded biologically without causing secondary pollution; and the lignosulfonate and the cardanol sulfonate are utilized to adsorb, complex and chelate, so that a complete and compact three-dimensional hydrophobic protective network is formed on a metal surface, and metal ions are effectively prevented from dispersing into water and corrosion mediums in water are effectively prevented from getting close to the metal surface, and therefore, high-temperature corrosion inhibition is reinforced.

Description

technical field [0001] The invention relates to a corrosion inhibitor, in particular to a high-temperature corrosion inhibitor for a vinyl chloride converter. Background technique [0002] The vinyl chloride converter is the key equipment in the production process of polyvinyl chloride. Due to the corrosion factors such as chloride ions contained in the circulating cooling water system, it is easy to cause electrochemical corrosion of the steel pipe, and the corrosion of the heat exchange tubes has become a common problem in the polyvinyl chloride industry. One of the problems that exists. In order to prevent and slow down the corrosion of equipment and ensure the long-term stable operation of the device, the most effective method at present is to add corrosion inhibitors to its circulating cooling water system. Since the reaction temperature of the process medium of the vinyl chloride converter reaches 180-210 °C, the temperature is higher when the local overheating occurs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/16
CPCC23F11/163
Inventor 刘光华张洪明孙金忠陆玉峰
Owner CHANGZHOU ZHONGNAN CHEM
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