Phosphorus-free corrosion and scale inhibitor and preparation method thereof

Abstract

The invention relates to a phosphorus-free corrosion and scale inhibitor and a preparation method thereof, belonging to water treatment. The phosphorus-free corrosion and scale inhibitor comprises the following components by weight percent: 25-40 of polyepoxysuccinic acid, 18-40 of acrylic copolymer, 5-15 of azole, 1-3 of molybdate, 2-6 of pH value modifier, and the balance of water. The preparation method comprises steps of adding the water, the pH value modifier, poly-epoxy succinic acid the acrylic copolymer, the molybdate and the azole proportionally into a vessel in sequence and stirring the mixture for 1-1.5 hours at the room temperature to obtain finished products. The phosphorus-free corrosion and scale inhibitor has simple preparation process, short preparation time, excellent rust and scale inhibition and favorable environment protection.

Description

technical field [0001] The invention relates to water treatment, in particular to a phosphorus-free corrosion and scale inhibitor and a preparation method thereof. Background technique [0002] my country is listed as one of the water-poor countries in the world, especially in the northern and western regions. Water quality and water shortages are also very serious in southeast China due to surface water pollution. At present, China's water shortage exceeds 100 billion cubic meters. Per capita water resources in many areas are already close to that of Israel, a world-famous water-scarce country. Among the 670 large and medium-sized cities in the country, 400 cities are short of water to varying degrees. 110 of these cities suffer from severe water shortages. Faced with such a severe situation of water shortage, my country's industrial water consumption is astonishingly wasted. The main reason is that the reuse rate of industrial water is low. The reuse rate of industri...

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Problems solved by technology

[0004] In recent years, the development of organic phosphoric acid corrosion and scale inhibitors has been extremely rapid. They have the advantages of stable chemical properties, high temperature and pH resistance, obvious solubility-limiting effect and synergistic effect. However, phosphorus is a nutrient source for bacteria and algae. , Phosphorus-containing scale inhibitors are likely to cause eutrophication of environmental waters, promote the growth of bacteria and algae to form red tides and cause water pollution