Boiler cleaning agent

A cleaning agent and boiler technology, applied in the field of chemical preparations for boiler cleaning, can solve the problems of long cleaning time, difficult environmental protection requirements, complicated cleaning process, etc., and achieve the effect of short cleaning time and low corrosion

Inactive Publication Date: 2014-01-15
杨桂望
5 Cites 4 Cited by

AI-Extracted Technical Summary

Problems solved by technology

Commonly used cleaning methods include the use of hydrochloric acid, citric acid, EDTA ammonia salt, hydrofluoric acid, sulfamic acid and sulfuric acid, etc., which require two major steps of cleaning, descaling and passivation including pickling, water ri...
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Abstract

The invention provides a boiler cleaning agent which comprises octyl phenol polyoxyethylene ether with the degree of polymerization being 9-11, disodium salt of EDTA (Ethylene Diamine Tetraacetic Acid), polyacrylic acid, cetyl dimethyl benzyl ammonium chloride, citric acid, an inhibiter, hydrogen peroxide, ethyl alcohol and water. The boiler cleaning agent provided by the invention is short in cleaning time and small in corrosion, and the cleaning fluid and a cleaning method for completing the steps of cleaning, descaling and passivating on a power station boiler at one time are provided.

Technology Topic

ChemistryCorrosion +16

Image

  • Boiler cleaning agent
  • Boiler cleaning agent
  • Boiler cleaning agent

Examples

  • Experimental program(2)
  • Effect test(1)

Example Embodiment

[0030] Example 1
[0031] Weigh 0.11 mol of o-phenylenediamine and 0.05 mol of sebacic acid, grind thoroughly in a mortar to make them evenly mixed, and transfer to a three-necked flask. Add 20 mL of commercially available hydrochloric acid, 5 mL of commercially available phosphoric acid, and 75 mL of deionized water to form a mixed acid, vent through nitrogen, and heat to reflux with mechanical stirring for reaction. TLC tracked and monitored the reaction until the end of the reaction, about 10 hours, poured into a 250mL beaker, left to cool, and adjusted pH=7 with concentrated ammonia. Let it stand overnight at 4°C, filter and dry it with suction, and recrystallize the obtained crude product with methanol/water to obtain a pure product.

Example Embodiment

[0032] Example 2
[0033] Dissolve 4g of the disodium salt of EDTA in 100g of water, add 1g of polyoxyethylene octylphenol ether with a degree of polymerization of 10, 2g of polyacrylic acid, 1g of cetyldimethylbenzylammonium chloride, 8g of citric acid, ω , Ω'-bis(benzimidazol-2-yl)alkane 2.5g, hydrazine hydrate 2.5g, hydrogen peroxide 1g and ethanol 6g, stirred for 40 minutes to obtain a cleaning agent.

PUM

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Description & Claims & Application Information

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