Preparation method of dialkylphosphinate with excellent flowing property

Preparation method of dialkylphosphinate with excellent flowing property

CN
  • CN 103,172,664 A
  • Filed: 02/27/2013
  • Published: 06/26/2013
  • Est. Priority Date: 02/27/2013
  • Status: Active Grant
First Claim
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1. the preparation method with dialkylphosphinic salts of good free-running property, is characterized in that, comprises the following steps:

  • A) add in dialkyl phosphinic acid and/or dialkyl phosphinic acid aqueous solution of alkali metal salt and help crystallizing agent, obtain containing the dialkyl phosphinic acid and/or the dialkyl phosphinic acid aqueous solution of alkali metal salt that help crystallizing agent;

    B) with the mixture of metallic compound and water and dialkyl phosphinic acid and/or the dialkylphosphinic salts of dialkyl phosphinic acid aqueous solution of alkali metal salt reaction generation as shown in formula I that helps crystallizing agent that contain that obtains;

    Wherein, the described crystallizing agent that helps is that positively charged ion helps crystallizing agent, anionic retention aid crystallizing agent, nonionic to help crystallizing agent and/or zwitter-ion to help crystallizing agent;

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