Method for preparing macromolecular water-absorbing resin by utilizing whole corn powder

Method for preparing macromolecular water-absorbing resin by utilizing whole corn powder

  • CN 105,566,570 A
  • Filed: 11/06/2014
  • Published: 05/11/2016
  • Est. Priority Date: 11/06/2014
  • Status: Active Application
First Claim
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1. utilize corn powder to prepare a method for hydroscopic high-molecular resin, it is characterized in that, step is as follows:

  • (1) vinylformic acid of 120-240g is dissolved in 50-150ml water, obtains acrylic acid aqueous solution;

    (2) 50-100g sodium hydroxide is dissolved in 150-250ml water, obtains aqueous sodium hydroxide solution;

    (3) be slowly added in acrylic acid aqueous solution by aqueous sodium hydroxide solution, being mixed with degree of neutralization is that the aqueous sodium acrylate solution of 70-90% is for subsequent use;

    (4) be added in there-necked flask or beaker by 4-12g corn powder and 50-100ml water, at 70-80 DEG C of temperature, gelatinization 0.8-1.2h, is cooled to 40-50 DEG C;

    (5) adding the degree of neutralization being dissolved with 0.02-0.05g linking agent is the sodium acrylate solution of 70-90%, stirs and after leading to nitrogen deoxygenation 30min, adds 0.1-0.3g initiator, is warming up to 55 DEG C of reaction 5h, is cooled to room temperature;

    (6) adopt sodium hydroxide to carry out the solution of neutralization procedure (5), after the pH value of solution is adjusted to 7, utilizes whizzer centrifugal 5min under 3000r/min speed, then use distilled water wash 5min, dry;

    (7) to be dried when being no more than 5% to water content, be divided into fritter, then dry at 70-120 DEG C of temperature, pulverize, cross 150 mesh sieves, packaging.

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