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A kind of polyvinyl phosphoric acid and preparation method thereof

A polyvinyl phosphoric acid and phosphoric acid ester technology, applied in the field of functional polymers, can solve the problems of low content of functional groups, difficult handling, complicated processes, etc., and achieve the effects of high content of functional groups, simple process preparation and low material cost

Active Publication Date: 2021-06-04
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current phosphoric acid resin has the disadvantage of low functional group content, which limits the application of this type of resin; moreover, there are technical problems such as relatively complicated process and difficult post-reaction treatment in the resin preparation process.

Method used

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  • A kind of polyvinyl phosphoric acid and preparation method thereof
  • A kind of polyvinyl phosphoric acid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of preparation method of polyvinyl phosphoric acid, concrete steps are:

[0036] (1) Add 10g of PVC into the reaction kettle, then add 50g of phosphoric acid ester and 100g of solvent in sequence, then raise the temperature to 80°C for 24h to obtain the reaction solution;

[0037] The amount of PVC, solvent and phosphoric acid ester used in the above-mentioned reaction is calculated by mass ratio, that is, PVC: phosphoric acid ester: solvent is calculated in a ratio of 1:5:10;

[0038] The phosphoric acid ester is trimethyl phosphite;

[0039] Described solvent is 2-methyltetrahydrofuran;

[0040] The PVC is cross-linked polyvinyl chloride microspheres with a particle size of 100-300 μm, produced by Shanghai Qingyuan Resin Co., Ltd.;

[0041] (2), the reaction solution of step (1) gained is filtered, and the filter cake of gained is washed 3 times with ethanol and distilled water respectively successively, and the filter cake obtained is phosphoric acid ester r...

Embodiment 2

[0047] A kind of preparation method of polyvinyl phosphoric acid, concrete steps are:

[0048] (1) Add 10g of PVC to the reaction kettle, then add 60g of phosphoric acid ester and 200g of solvent in sequence, then raise the temperature to 100°C for 24h to obtain the reaction solution;

[0049] The amount of PVC, solvent and phosphoric acid ester used in the above-mentioned reaction is calculated by mass ratio, that is, PVC: phosphoric acid ester: solvent is calculated in a ratio of 1:6:20;

[0050] The phosphoric acid ester is trimethyl phosphite;

[0051] Described solvent is sherwood oil;

[0052] The PVC is cross-linked polyvinyl chloride microspheres with a particle size of 100-300 μm, produced by Shanghai Qingyuan Resin Co., Ltd.;

[0053] (2), the reaction solution of step (1) gained is filtered, and the filter cake of gained is washed 3 times with ethanol and distilled water respectively successively, and the filter cake obtained is phosphoric acid ester resin;

[00...

Embodiment 3

[0060] A kind of preparation method of polyvinyl phosphoric acid, concrete steps are:

[0061] (1) Add 10g of PVC to the reaction kettle, then add 60g of phosphoric acid ester and 300g of solvent in sequence, then raise the temperature to 80°C for 36h to obtain the reaction solution;

[0062] The amount of PVC, solvent and phosphoric acid ester used in the above-mentioned reaction is calculated by mass ratio, that is, PVC: phosphoric acid ester: solvent is calculated in a ratio of 1:6:30;

[0063] The phosphoric acid ester is trimethyl phosphite;

[0064] Described solvent is 2-methyltetrahydrofuran;

[0065] The PVC is cross-linked polyvinyl chloride microspheres with a particle size of 100-300 μm, produced by Shanghai Qingyuan Resin Co., Ltd.;

[0066] (2), the reaction solution of step (1) gained is filtered, and the filter cake of gained is washed 3 times with respectively ethanol and distilled water successively, and the filter cake obtained is phosphoric acid ester res...

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Abstract

The invention provides a preparation method of polyvinyl phosphoric acid, which is characterized in that it comprises the following steps: Step 1: Add PVC, phosphoric acid ester and solvent into a reaction kettle, heat up to 60-100°C and react for 24-72 hours; Step 2: filter the reaction solution obtained in step 1, and wash the obtained filter cake with ethanol and distilled water for 3-5 times in turn to obtain a phosphate resin; step 3: add the phosphate resin obtained in step 2 to the reaction kettle, and then Add concentrated hydrochloric acid, heat up to 60-100°C, and carry out hydrolysis reaction for 24-72h; step 4: filter the reaction solution obtained in step 3, wash the obtained filter cake with distilled water for 3-5 times, and then wash the washed filter cake Dry to obtain polyvinyl phosphoric acid. The phosphoric acid resin obtained in the present invention has a uniform particle size of 100-300 μm, and has a high content of functional groups (up to 10 mmol / g).

Description

technical field [0001] The invention relates to a phosphoric acid resin and a preparation method thereof, belonging to the field of functional polymers. Background technique [0002] Acidic resin is a polymer solid acid, which has a cross-linked polymer as a skeleton and is connected with an acidic functional group, which can react with metal ions from a solution containing metal ions to form an ionic bond. Then, it is a kind of functional polymer that can release the metal ions on the resin under appropriate elution conditions. The base material of the polymer solid acid may be cross-linked polystyrene, cross-linked polyphenol or cross-linked polyacrylic acid. They are prepared by suspension polymerization of conventional monomers, and have the characteristics of mature preparation process, easy functionalization, high mechanical strength and good chemical stability. [0003] The current phosphoric acid resin has the disadvantage of low functional group content, which lim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/12C08F8/40C08F114/06
Inventor 李永胜张童心李欣宜徐耀民
Owner SHANGHAI INST OF TECH
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