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Synthesis process of poly-MA-AA-Mac (poly-maleic anhydride-acrylic acid-methyl acrylate) anti-scale agent based on control of pH value

A synthesis process and anti-fouling agent technology, which is applied in the direction of organic detergent compositions, etc., can solve the problems of limited use, high cost, and large amount of addition, and achieve the effects of reduced production cost, simple preparation process, and high preparation conversion rate

Inactive Publication Date: 2014-05-21
陈春林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
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Embodiment

[0021] A kind of synthetic technique of the polyMA-AA-Mac antifouling agent that the present invention relates to control pH value, comprises the steps: (a) at first, prepare the maleic anhydride solution of certain concentration, acrylic acid solution and methyl acrylate respectively according to certain proportioning (b) Then, add maleic anhydride solution, acrylic acid solution and methyl acrylate in different containers by dropping different monomers, and adjust the pH of the solution to 7-10; (c) then start stirring and heating The device is kept at a constant temperature and stirred for a period of time, then stopped, and cooled naturally to obtain the target product.

[0022] The container is a four-necked bottle with stirring device, dropping funnel, thermometer and condensing device.

[0023] The three dropping funnels were filled with acrylic acid solution, methyl acrylate and ammonium persulfate solution respectively.

[0024] Naturally cool to room temperature.

...

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Abstract

The invention discloses a synthesis process of a poly-MA-AA-Mac (poly-maleic anhydride-acrylic acid-methyl acrylate) anti-scale agent based on control of pH value. The synthesis process disclosed by the invention comprises the following steps of: (a), firstly, respectively preparing maleic anhydride solution, acrylic acid solution and methyl acrylate with a certain concentration according to a certain proportion; (b), then, adding maleic anhydride solution, acrylic acid solution and methyl acrylate into different containers by adopting different monomer dropping manners, and adjusting the pH of the solution to be 7-10; (c), starting a stirring and temperature-increasing device, stopping after keeping constant-temperature stirring reaction for a certain time, naturally cooling, and thus obtaining the target object. The synthesis process disclosed by the invention is capable of rapidly preparing the poly-MA-AA-Mac anti-scale agent; furthermore, the preparation process is simple; the preparation conversion rate is high; the preparation cost of maleic anhydride-acrylic acid-methyl acrylate copolymer is greatly reduced; in addition, the product conversion rate and the product performance are improved by controlling the pH value in the synthesis process.

Description

technical field [0001] The invention relates to a synthesis process of a polyMA-AA-Mac antiscaling agent with pH value controlled. 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) Organi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/06C08F220/06C08F220/14C11D3/37
Inventor 陈春林
Owner 陈春林
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