Synthesis technology of maleic anhydride-crylic acid-methyl acrylate copolymer

Abstract

The invention discloses a synthesis technology of maleic anhydride-crylic acid-methyl acrylate copolymer. The synthesis technology comprises steps of (a) firstly, respectively preparing certain concentration of maleic anhydride solution, crylic acid solution, ammonium persulfate solution and a certain amount of methyl acrylate according to certain proportion; (b) then adding the maleic anhydride solution into a vessel; (c) then starting a stirring and temperature rising device; (d) after achieving certain temperature, keeping the constant temperature, dripping initiator and monomer solution, after dripping, rapidly raising temperature up to certain value; (e) after stirring and reacting for a period at the constant temperature, stopping, cooling down naturally, so as to obtain the target product. The synthesis technology can be used for rapidly preparing the maleic anhydride-crylic acid-methyl acrylate copolymer, the preparation process is simple, the conversion rate of the preparation is high, and the preparation cost of the maleic anhydride-crylic acid-methyl acrylate copolymer is greatly lowered.

Description

technical field [0001] The invention relates to a synthesis process of maleic anhydride-acrylic acid-methyl acrylate copolymer. 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) Organic p...

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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