Poly(MA-AA-Mac) (Poly(Maleic Anhydride-Acrylic Acid-Methyl Acrylate)) anti-scaling agent synthesis process based on control on using amount of initiator

Abstract

The invention discloses a poly(MA-AA-Mac) (Poly(Maleic Anhydride-Acrylic Acid-Methyl Acrylate)) anti-scaling agent synthesis process based on control on the using amount of an initiator. The process comprises the following steps: (a) preparing a maleic anhydride solution, an acrylic acid solution and methyl acrylate; (b) adding the maleic anhydride solution, the acrylic acid solution and methyl acrylate into a reaction container; (c) adding an initiator into the reaction container while controlling the amount of the initiator to be 8-12 percent based on the total mass of monomers; (d) starting a stirring and heating device, keeping reacting at a constant temperature while stirring for a certain period, stopping reacting, and naturally cooling to obtain a target product. By adopting the synthesis process, a poly(MA-AA-Mac) anti-scaling agent can be prepared rapidly. Moreover, the preparation process is simple, the preparation conversion rate is high, and the preparation cost of a maleic anhydride-acrylic acid-methyl acrylate copolymer is reduced greatly. Moreover, by controlling the using amount of the initiator in the synthesis process, the anti-scaling performance of the target product is improved.

Description

technical field [0001] The invention relates to a synthesis process of a polyMA-AA-Mac antifouling agent with controlled initiator dosage. Background technique [0002] Descaling agent is a chemical preparation that removes scale, dirt and other stains, and is generally composed of multiple components. Industrial descaling agents are mainly used to remove dirt in heat exchange equipment, boilers, etc. [0003] Common types of descaling agents and their characteristics: [0004] (1) Inorganic polyphosphate. This type is the earliest descaling agent used, and its use has been restricted abroad. There are one or more repeated P-O-P bonds in its molecule, which can be divided into chain polyphosphate and cyclic polyphosphate. The disadvantage of inorganic polyphosphate is that it is easy to be hydrolyzed by moisture to form orthophosphate, especially at high temperature and high pH value, and it will react with divalent cations such as Ca2+, Mg2+, etc. to scale. [0005] (2...

AI Technical Summary

Problems solved by technology

This kind of descaling agent mainly prevents scale through chelation, so the amount added is large and the cost is high, so its use is limited in industrial processes with large amounts of water

Images