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Method for preparing phosphorus-free water treatment corrosion inhibitor from gutter oil and the prepared phosphorus-free water treatment corrosion inhibitor

A phosphorus-free corrosion inhibition and waste oil technology, applied in natural water treatment, non-polluted water treatment, special compound water treatment, etc., to achieve the effect of simple operation, strong impact ability and low cost in the production process

Active Publication Date: 2019-04-02
天津沃川水处理工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the use of waste oil to produce water treatment corrosion inhibitors at home and abroad

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Heat 100kg of waste oil to 60°C, first add 60kg of diethanolamine, raise the temperature to 160°C for 2 hours under constant stirring, and then cool down to 80°C naturally, then add 40kg of diethanolamine and 5.0kg of sodium acetate, stirring control The temperature was reacted at 80°C for 2 hours to obtain the corrosion inhibitor intermediate A;

[0035] 2) Slowly add 30.75 kg of epichlorohydrin into the corrosion inhibitor intermediate A, and react at a controlled temperature of 80° C. for 4 hours to obtain the phosphorus-free corrosion inhibitor intermediate B.

[0036] 3) Add 23.575kg of polyethylene glycol 400 and 4.715kg of zinc acetate to the corrosion inhibitor intermediate B, and control the temperature at 80°C for 4 hours to obtain a phosphorus-free corrosion inhibitor.

[0037] Application example of phosphorus-free corrosion inhibitor of the present invention

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Abstract

The invention discloses a method for preparing a phosphorus-free water treatment corrosion inhibitor from waste oil as a raw material and the phosphorus-free water treatment corrosion inhibitor prepared by the method, and belongs to the waste utilizing processing technology. The waste oil is rich in source, and the method comprises the following steps: firstly, performing reaction on the waste oil and an alcohol amine compound to obtain an intermediate product A; secondly, adding epichlorohydrin to synthesize cyclic ether to obtain an intermediate product B; finally, adding polyethylene glycol and reacting to produce the phosphorus-free water treatment corrosion inhibitor. The phosphorus-free water treatment corrosion inhibitor prepared by the method has the characteristics of high corrosion inhibition rate and small using amount of chemicals. After the phosphorus-free water treatment corrosion inhibitor is compounded with a polycarboxylic scale-inhibiting dispersant for use, the phosphorus-free water treatment corrosion inhibitor can be used as a phosphorus-free scale-inhibiting corrosion inhibitor; after the phosphorus-free water treatment corrosion inhibitor is compounded with alkali, a reducing agent and the like for use, the phosphorus-free water treatment corrosion inhibitor can replace sodium nitrite and be used as a corrosion inhibitor for a closed water system. By the method, the waste oil can be used as the main raw material, so that the waste is turned into a treasure; a new way of disposing and utilizing the waste oil is provided.

Description

technical field [0001] The invention relates to a method for preparing a phosphorus-free water treatment corrosion inhibitor, especially a method for preparing a phosphorus-free water treatment corrosion inhibitor using waste oil as a raw material and the prepared phosphorus-free water treatment corrosion inhibitor, belonging to industrial water treatment Field Inhibiting Water Corrosion Inhibitors for Metals. Background technique [0002] In the industrial circulating cooling water system, there are mainly three problems of scaling, corrosion and microbial hazards. The most convenient and effective way to prevent system scaling and corrosion is to add corrosion and scale inhibitors to the circulating water. At present, most of the formulas commonly used in the treatment of circulating cooling water in China are phosphine-based formulas. The pollution of phosphine-containing compounds to water bodies and the resulting eutrophication have made people gradually realize the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/10C02F5/12C23F11/14C02F103/02
CPCC02F5/10C02F5/12C02F2103/023C02F2303/04C02F2303/08C02F2305/04C23F11/145
Inventor 王传军苑晓光张桂珍陈彩丽
Owner 天津沃川水处理工程技术有限公司
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