Multifunctional phosphorus-free corrosion and scale inhibitor based on humic acid derivative and preparation method thereof

A technology of phosphorus-free corrosion inhibition and polymethacrylate humate, which is applied to chemical instruments and methods, descaling and water softening, and special treatment targets, can solve the problem of incomplete information on chemicals and achieve good corrosion and resistance The effect of the dirt effect

Inactive Publication Date: 2020-03-06
JURONG NINGWU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent Application No. 201410731750.6 "A Preparation Method of Phosphorus-Free Corrosion and Scale Inhibitor", discloses that the main components are sodium polyepoxysuccinate, carbon steel corrosion inhibitor, surfactant, reinforcing agent, etc., but some agents incomplete information

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 15 grams of humic acid, 25 grams of methacrylic acid, 1 gram of p-toluenesulfonic acid, and 0.5 grams of azobisisobutyronitrile into 59 grams of xylene, stir and mix, and control the polymerization reaction of methacrylic acid at 65 ° C. 130 Partial esterification reaction occurs at ℃, and the reaction ends when about 3.5 grams of water are separated out. Then, evaporate the solvent in the reaction system under reduced pressure at -0.2MPa at 85°C to obtain polyacrylic acid humate.

[0031] Mix 40 grams of polymethacrylate humate, 2 grams of thiourea, 10 grams of potassium iodide, 20 grams of methanol, 38 grams of water, etc., and stir to obtain the target product of this patent.

Embodiment 2

[0033] Add 25 grams of humic acid, 20 grams of methacrylic acid, 2 grams of p-toluenesulfonic acid, and 1 gram of azobisisobutyronitrile into 50 grams of xylene, stir and mix, and control the polymerization reaction of methacrylic acid at 75 ° C. Partial esterification of humic acid occurs at 140°C, and the reaction ends when about 3 grams of water are separated out. Then, evaporate the solvent in the reaction system under reduced pressure at -0.2MPa at 85°C to obtain polymethacrylate humate.

[0034] Mix 45 grams of polymethacrylate humate, 5 grams of thiourea, 8 grams of potassium iodide, 25 grams of methanol, 17 grams of water, etc., and stir to obtain the target product of this patent.

Embodiment 3

[0036] The scale inhibition rate and corrosion inhibition rate of Example 1 and Example 2 were measured, and the results are shown in Table 1.

[0037] Among them, the measurement method of scale inhibition rate is in accordance with the implementation standard "Q / SY 126-2014"; the measurement method of corrosion inhibition rate is in accordance with the implementation standard "Q / SY 126-2014".

[0038] Table 1

[0039] serial number name Scale inhibition rate% Corrosion inhibition rate% 1 Example 1 product 95 90 2 Example 2 product 94 88

[0040] It can be seen from the data in Table 1 that the scale inhibition rate and corrosion inhibition rate of the corrosion and scale inhibitor obtained in the present invention are higher than the standard requirements, and have better scale and corrosion inhibition effects, and its components do not contain phosphine compounds, which meet the requirements of green environmental protection. development ...

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Abstract

The invention discloses a multifunctional phosphorus-free corrosion and scale inhibitor based on a humic acid derivative and a preparation method thereof. Humic acid and methacrylic acid are used as raw materials to synthetize polymethacrylate humate through polymerization and esterification reaction of free radicals under the effects of a catalyst and an initiator; and then, the polymethacrylatehumate is mixed with a synergistic effect material and a solvent to prepare the phosphorus-free corrosion and scale inhibitor. The synthesized polymethacrylate humate is a novel single corrosion and scale inhibitor; a great number of hydroxide radicals and carboxyls are contained in molecular structures; straight chains and branched chains alternately extend; and the molecular weight can be regulated and controlled through a formula design. The corrosion and scale inhibitor provided by the invention does not contain phosphorus, nitrogen or zinc, can realize zero-pollution-discharge operation,has a good corrosion and scale inhibition effect when being used in a circulating cooling water system, belongs to an environmental-friendly corrosion and scale inhibitor, and has a flocculation effect.

Description

technical field [0001] The invention relates to the field of corrosion and scale inhibitors, in particular to a multifunctional phosphorus-free corrosion and scale inhibitor based on humic acid derivatives and a preparation method thereof. Background technique [0002] Today's industrial water consumption accounts for a large proportion of cooling water, the supply of cooling water has a major impact on the operation of the entire enterprise, and increasing the reuse rate of cooling water as much as possible can save industrial water. However, due to the continuous evaporation of the cooling water, the salts in the water are concentrated, and the contact between the cooling water and the atmosphere increases the content of dissolved oxygen and bacteria, which leads to serious scaling and corrosion problems in the circulating cooling water, which reduces the heat exchange rate and requires frequent maintenance. Threat production proceeds as normal. For this reason, it is nec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00C08F220/06C02F5/10C02F5/12
CPCC08F289/00C02F5/10C02F5/12C02F2303/08C08F220/06C23F14/02C23F11/08
Inventor 翟洪金李怀阁陈杨静张阳
Owner JURONG NINGWU CHEM
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