Cupreous acidic corrosion inhibitor containing bisdithiocarbamic group

A technology of dithiocarbamic acid and sodium ethylene tetraamine bisdithiocarbamate, which is applied in the field of copper corrosion inhibitors and can solve problems such as toxicity and refractory degradation

Inactive Publication Date: 2009-03-04
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Cupreous acidic corrosion inhibitor containing bisdithiocarbamic group
  • Cupreous acidic corrosion inhibitor containing bisdithiocarbamic group
  • Cupreous acidic corrosion inhibitor containing bisdithiocarbamic group

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Embodiment

[0016] In a three-necked flask equipped with a thermometer, a reflux condenser and an electric stirrer, first add 180mL of 5% sodium hydroxide solution, then add 40mL of triethylenetetramine, and then add carbon disulfide dropwise under ice bath conditions. Slowly, 40mL of carbon disulfide was added dropwise in 2 hours. Triethylenetetramine and carbon disulfide are added in a volume ratio of 1:2, and 5% sodium hydroxide solution and (triethylenetetramine + carbon disulfide) are added in a volume ratio of 2:1. React in an ice bath for 2 hours, then remove the ice bath, gradually raise the reaction temperature to 30°C, continue the reaction for 3 hours, wash with ethanol, methanol, vacuum filter, and vacuum dry at 55°C to obtain the light yellow product triethylene tetra Sodium Aminobisdithioformate.

[0017] Infrared Spectroscopy Analysis

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Abstract

The invention relates to an acid inhibitor of copper containing dithiocarbamic acid group, and a preparation method thereof. First, 5 percent sodium hydroxide solution is added into a three-neck flask comprising a thermometer, a reflex condensing pipe and an electric stirrer; next, triethylene tetramine is added in; and then carbon bisulfide is added into an ice bath drop by drop. The materials react for 2h in the ice bath; and then the ice bath is removed, so that the temperature gradually rises to 30 DEG C; the materials continue to react for 3h; the materials are washed by ethanol and methanol, suctioned and filtered under vacuum condition, dried at 55 DEG C under vacuum condition, and finally a light yellow product triethylene tetramine-based dithiocarbamic sodium formate. The acid inhibitor of copper is a linear compound, easy to be biodegraded, has no toxin, and has very good inhibiting function to copper in acid medium.

Description

technical field [0001] The invention relates to a copper corrosion inhibitor, in particular to an acidic corrosion inhibitor for copper containing bis-dithiocarbamate groups and a preparation method thereof. Background technique [0002] Copper and copper alloys have good thermal conductivity and mechanical properties, and are one of the materials widely used in heat exchange systems. Benzotriazole (BTA) is the most widely used copper corrosion inhibitor in industry. However, the best corrosion inhibition effect of BTA on copper is in the neutral and alkaline medium with a pH value between 6-11, and the corrosion inhibition effect of BTA in acidic medium drops sharply. In order to meet the requirements of acid treatment processes such as acid descaling of equipment in industry, it is necessary to develop copper corrosion inhibitors with good performance and suitable for use in acidic media. Sulfur atoms have excellent adsorption properties on copper, and some sulfur-contai...

Claims

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Application Information

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IPC IPC(8): C23G1/06C23G1/10
CPCC23F11/162C23F11/16
Inventor 廖强强李伟岳忠文卞燕雯张晟杨涛李义久
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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