Phosphorus-free corrosion inhibitor for low temperature and corrosion inhibition method for circulating cooling water
A circulating cooling water, phosphorus-free corrosion inhibition technology, applied in chemical instruments and methods, natural water treatment, descaling and water softening, etc., can solve problems such as strong corrosion, reduce treatment costs, save costs, and reduce growth and the effect of reproduction
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
preparation example 1
[0069] Prepare the condensation reaction product of sodium gluconate and aspartic acid: add 10.9g sodium gluconate, 16.6g aspartic acid and 100mL water in a four-necked flask equipped with a stirrer, a distillation device and a thermometer, and start stirring, so that Sodium gluconate and aspartic acid are fully dissolved and mixed. Add 7.5g (containing H 2 SO 4 ,0.075mol) concentrated sulfuric acid, heated to 140°C in an oil bath (dimethyl silicone oil), reacted for 6 hours, the amount of water evaporated was 45g, and the condensation reaction product of sodium gluconate and aspartic acid was obtained after the remaining liquid was cooled. , the solid content is 26.3% by weight, and its molecular weight distribution is in the range of 311-426.
preparation example 2
[0071] Preparation of the condensation reaction product of sodium gluconate and aspartic acid: Add 21.8g sodium gluconate, 26.6g aspartic acid and 100mL water in a four-necked flask equipped with a stirrer, a distillation device and a thermometer, and start stirring so that Sodium gluconate and aspartic acid are fully dissolved and mixed. Add 15g (0.15mol) of concentrated sulfuric acid at 20°C, heat the oil bath (simethicone oil) to 100°C, react for 10 hours, distill 30g of water, and get the mixture of sodium gluconate and aspartic acid after cooling the remaining liquid The condensation reaction product has a solid content of 29.5% by weight and a molecular weight distribution of 311-426.
Embodiment 1
[0073] Weighing 7.60g solid content is the condensation reaction product of sodium gluconate and aspartic acid (according to Preparation Example 1) of 26.3% by weight, 2.5g solid content is the polyepoxysuccinic acid of 40% by weight, 4.44g solid content TH-2000 with a content of 45% by weight (density (20°C) ≥ 1.15g cm -3 , dynamic viscosity (25°C) is 100-500cps), 2.2g of ZnSO 4 ·7H 2 O, add 83.26g of water and shake well to obtain 100g of the required preparation.
[0074] When the prepared agent is added to the test water at a concentration of 100mg / L, the condensation reaction product of sodium gluconate and aspartic acid in water, polyepoxysuccinic acid, TH-2000 and Zn 2+ The effective concentrations are 2mg / L, 1mg / L, 2mg / L and 0.5mg / L, respectively.
[0075] The evaluation was carried out according to the corrosion inhibition performance evaluation method of the above-mentioned corrosion inhibitor, wherein the test piece material used in the rotary coupon corrosion te...
PUM
Property | Measurement | Unit |
---|---|---|
density | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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