Phosphorus-free scale and corrosion inhibitor and preparation method thereof

A phosphorus-free scale and corrosion inhibitor technology, applied in chemical instruments and methods, descaling and water softening, special treatment goals, etc., can solve problems such as poor corrosion inhibition effect, secondary pollution agent dosage, etc., and achieve optimal protection performance, excellent scale and corrosion inhibition performance, and obvious advantages

Active Publication Date: 2020-03-31
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the problems of the existing technology such as environmental secondary pollution, large dosage of chemicals, and poor corrosion inhibition effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of adsorptive macromolecule corrosion inhibitor: get 75 parts by weight of thiourea and place it in a four-necked bottle with a stirrer, add 128 parts by weight of pure water and an appropriate amount of triethylamine to the four-necked bottle, stir and dissolve, and heat up for 70 ℃, slowly add 250ml of dilute acid solution containing 147 parts by weight of glutamic acid dropwise, add dropwise for 25min~30min at 70℃~85℃, continue to react for 1h after the dropwise addition, then cool down to below 65℃, add 32 parts by weight of ethylene glycol amine, reacted at 65°C for 20min, raised the temperature to 90°C, began to drop 200ml of ethanol aqueous solution containing 38 parts by weight of adipic acid and 65 parts by weight of lauroyl sarcosine (LS), added dropwise at 90°C~92°C for 20min, and kept warm for 1.5 h, the temperature was lowered to below 50°C, and the material was discharged to obtain an adsorptive polymer corrosion inhibitor with a solid content o...

Embodiment 2

[0034] A phosphorus-free scale and corrosion inhibitor, the raw material components in parts by weight are: 15 parts of adsorptive polymer corrosion inhibitor, 5 parts of modified lignosulfonate, acrylic acid-2-acrylamide-2-methyl 10 parts of propanesulfonic acid copolymer, 15 parts of acrylic acid-alkene sulfonic acid-acrylate-allyl polyoxyethylene ether copolymer, 15 parts of polyepoxysuccinic acid derivatives, 3 parts of BTA, itaconic acid-propylene three Carboxylic acid-acrylic acid-polyepoxysuccinic acid copolymer 10 parts, pure water 15 parts.

[0035] The preparation method of phosphorus-free scale and corrosion inhibitor is as follows:

[0036] S1: Add the adsorptive macromolecule corrosion inhibitor, sulfonate copolymer, polycarboxylic acid, and carboxylic acid copolymer to the reaction kettle in sequence according to the above parts by weight;

[0037] S2: After stirring for 20 minutes, add azole derivatives, natural modified scale inhibitor and dispersant;

[0038...

Embodiment 3

[0041] A phosphorus-free scale and corrosion inhibitor, the raw material components in parts by weight are: 20 parts of adsorbent polymer corrosion inhibitor, 5 parts of modified lignosulfonate, 5 parts of carboxyethyl-quaternary amphoteric chitosan Parts, 5 parts of itaconic acid-2-acryloyl-2-methylpropanesulfonate sodium copolymer, 20 parts of acrylic acid-alkene sulfonic acid-acrylate-allyl polyoxyethylene ether copolymer, polyepoxysuccinate 20 parts of acid derivatives, 10 parts of acrylic acid-styrenesulfonic acid, 10 parts of BTA, 5 parts of itaconic acid-propylene tricarboxylic acid-acrylic acid-polyepoxysuccinic acid copolymer, 25 parts of pure water.

[0042] The preparation method of phosphorus-free scale and corrosion inhibitor is as follows:

[0043] S1: Add the adsorptive macromolecule corrosion inhibitor, sulfonate copolymer, polycarboxylic acid, and carboxylic acid copolymer to the reaction kettle in sequence according to the above parts by weight;

[0044] S2:...

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Abstract

The invention discloses a phosphorus-free scale and corrosion inhibitor. The phosphorus-free scale and corrosion inhibitor comprises the following raw materials in parts by weight: 15-35 parts of an adsorptive macromolecular corrosion inhibitor, 5-15 parts of a natural modified scale inhibition dispersion agent, 25-45 parts of a sulfonate copolymer, 10-20 parts of polycarboxylic acid, 0-10 parts of azole derivatives, 5-15 parts of a carboxylic acid copolymer and 0-30 parts of pure water. The phosphorus-free scale and corrosion inhibitor has excellent scale and corrosion inhibition performanceand wide practicability, has excellent protection effects on equipment made of carbon steel, stainless steel, copper and other materials, and prolongs the service life of the equipment. The phosphorus-free scale and corrosion inhibitor has a full-organic formula, and the components are biodegradable and environment-friendly, and do not cause secondary pollution to the environment. The phosphorus-free scale and corrosion inhibitor is used in circulating water with three highs (high hardness, high chloride ions and high pH), and has more obvious advantages. The phosphorus-free scale and corrosion inhibitor has the greatest advantages that the scale and corrosion inhibition performance is good, and a small amount of scale and corrosion inhibitor is efficient. The phosphorus-free scale and corrosion inhibitor can meet the requirements of zero emission technology of pollutants.

Description

technical field [0001] The invention belongs to the field of water treatment agents, and in particular relates to a phosphorus-free scale and corrosion inhibitor and a preparation method thereof. Background technique [0002] At present, the varieties of water treatment chemicals in my country are incomplete, and most of them are analyzed, imitated or developed based on foreign patents. In addition, the development of my country's water treatment chemicals industry is relatively short, and scientific research funds are limited, resulting in weak foundation, backward technology, and low overall level. Phenomenon. Especially in the special water quality and cutting-edge fields, there is still a certain gap with foreign countries, which is mainly reflected in the serialization of new environmentally friendly water-soluble copolymer water treatment chemicals. [0003] The new water-soluble antiscalant has a huge system and many types, and the related technology research is perfe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C23F11/173C02F5/12
CPCC02F5/10C02F5/12C02F2303/08C23F11/173
Inventor 张留成郭翠娟梁清雷刘娅林徐旭东纪春玲谢泽新高松郑萍赵继光
Owner SHANDONG TIANQING TECH DEV
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