Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

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
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these aromatic compounds have a common feature, containing benzene rings, which are toxic and difficult to degrade

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cupreous acidic corrosion inhibitor containing bisdithiocarbamic group
  • Cupreous acidic corrosion inhibitor containing bisdithiocarbamic group
  • Cupreous acidic corrosion inhibitor containing bisdithiocarbamic group

Examples

Experimental program
Comparison scheme
Effect test

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com