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Non-phosphate corrode-releasing antisludging agent and method for synthesizing same

A phosphorus-free corrosion and scale inhibitor technology, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve problems that have not been reported in the literature, and achieve increased activation energy, Raw materials are readily available and the effect of slowing down the corrosion rate

Inactive Publication Date: 2009-01-07
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there is no bibliographical information about the multifunctional water treatment agent containing aminocarboxylate

Method used

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  • Non-phosphate corrode-releasing antisludging agent and method for synthesizing same
  • Non-phosphate corrode-releasing antisludging agent and method for synthesizing same
  • Non-phosphate corrode-releasing antisludging agent and method for synthesizing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Preparation of N-(1-carboxy-3-methoxy-3-carbonylpropyl)-N'-(2-thioformyl) ethylenediamine sodium dimethyl sulfonate (CsEM2S)

[0024]

[0025] Dissolve 13g (0.1mol) of monomethyl maleate in solvent (water and ethanol) and add dropwise to 6g (0.1mol) of ethylenediamine, heat and reflux for 2-3 hours, cool to 40-60°C, drop into An aqueous solution containing 26.8g (0.2mol) of sodium hydroxymethanesulfonate was stirred and reacted for 6 to 12 hours. After the reaction was completed, the pH was adjusted to about 10 with 1mol / L NaOH, the temperature was lowered to below 10°C, and an ethanol solution of carbon disulfide (6mL +15mL). Control the temperature not to be higher than 10° C., react for 2 to 4 hours, and obtain the product CsEM2S as an orange-yellow liquid with a solid content of ≥ 30%. The infrared spectrum data of the solid substance are shown in Table 1.

Embodiment 2

[0026] Embodiment 2: the preparation of N-carboxymethyl-N'-(2-thioformyl) ethylenediamine sodium dimethyl sulfonate (CsEC2S)

[0027]

[0028] Add 9.5g (0.1mol) of chloroacetic acid aqueous solution dropwise to 6g (0.1mol) of ethylenediamine, heat to reflux for 1-2 hours, cool to 40-60°C, dropwise add 26.8g (0.2mol) of hydroxymethyl The aqueous solution of sodium sulfonate was stirred and reacted for 6-12 hours. After the reaction was completed, the pH was adjusted to about 10 with 1mol / L NaOH, the temperature was lowered to below 10°C, and an ethanol solution of carbon disulfide (6mL+15mL) was added dropwise. Control the temperature not higher than 10°C, react for 2-4 hours, and obtain the orange liquid of the product CsEC2S, which is diluted with water to a solid content ≥ 30%. The infrared spectrum data of the solid substance are shown in Table 1.

Embodiment 3

[0029] Example 3: N 1 -(1-carboxy-3-methoxy-3-carbonylpropyl)-N 3 Preparation of -(2-thioformyl) diethylene triamine sodium dimethyl sulfonate (Cs2EM2S)

[0030]

[0031] Dissolve 13g (0.1mol) of monomethyl maleate in a solvent (water and ethanol) and add dropwise to 10.3g (0.1mol) of diethylenetriamine, heat to reflux for 2 to 3 hours, and cool to 40 to 60°C. Add dropwise an aqueous solution containing 26.8g (0.2mol) sodium hydroxymethanesulfonate, stir and react for 6 to 12 hours, after the reaction is completed, adjust the pH to about 10 with 1mol / L NaOH, lower the temperature to below 10°C, and add dropwise an ethanol solution of carbon disulfide (6mL+15mL). Control the temperature not higher than 10°C, react for 2-4 hours, and obtain the product Cs2EM2S as an orange-yellow viscous liquid with a solid content of ≥30%. The infrared spectrum data of the solid substance are shown in Table 1.

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Abstract

The invention discloses a non-phosphorus corrosion mitigation scale inhibitor, which has a structure, such as a following formula (I): wherein, R1, R2, R3 or R4 is hydrogen, carboxylic group, carboxylate group, carboxylic ester group, polycarboxylic group, poly carboxylic ester group group, sulfo group, sulfonate group, dithio formylic group or dithio formate group respectively; n is 0, 1 or 2. The non-phosphorus corrosion mitigation scale inhibitor contains the carboxylic group, thesulfo group, dithiocarbamic acid salt and other various functional groups; the functional groups are the activated functional groups of a common water treatment agent at present; a compound integrates the functional groups, so that the compound has better anti-scaling and dispersion properties by utilizing the synergistic action among the functional groups; meanwhile the non-phosphate corrosion mitigation scale inhibitor is free from phosphor, and can be degraded biologically, thereby conducts to environment; and the non-phosphorus corrosion mitigation scale inhibitor has the advantages that the raw material is simple and easy to purchase; the production cost is low; the cost is low, and the non-phosphate corrosion mitigation scale inhibitor is easy to receive, thereby conducting to popularization.

Description

technical field [0001] The invention belongs to the technical field of industrial circulating cooling water treatment, and in particular relates to a novel multifunctional corrosion and scale inhibitor and a preparation method thereof. Background technique [0002] With the development of modern industry and the continuous improvement of environmental protection requirements, higher requirements are put forward for chemical treatment agents for industrial circulating cooling water. The preparation and mechanism research of water treatment chemicals with multiple functions such as scale inhibition, corrosion inhibition, dispersion, and sterilization, which are suitable for a wide range of water quality, are the main contents of the research on water treatment agents. The development of organic compounds containing multiple functional groups in one molecule has become a current research hotspot. [0003] At present, research on scale inhibitors at home and abroad mainly focus...

Claims

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Application Information

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IPC IPC(8): C02F5/12
Inventor 王锦堂徐斌伍振毅徐加应冯志强陈静张荣殷峻
Owner NANJING UNIV OF TECH