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Synthetic method of hydroxypropyl methacrylate

A technology of hydroxypropyl methacrylate and methacrylic acid, which is applied in the field of synthesis of hydroxypropyl methacrylate, can solve problems such as inability to recover catalyst, and achieve the effects of reducing synthesis cost and reducing by-products

Active Publication Date: 2013-09-11
NANTONG JUJIU NEW MATERIAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the defect that the existing method cannot recycle the catalyst, and provide a method for synthesizing hydroxypropyl methacrylate with recyclable catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 100g of methacrylic acid to the reaction kettle, then add 5g of magnetic zeolite molecular sieve, stir evenly, then add 66.7g of propylene oxide, close the reaction kettle, heat to 85°C, react for 3 hours, and collect 160g of formazan by distillation under reduced pressure. Hydroxypropyl acrylate (yield 97%, purity 99.3%).

Embodiment 2

[0017] Add 100g of methacrylic acid to the reaction kettle, then add 6g of magnetic zeolite molecular sieves, stir evenly, then add 65g of propylene oxide, close the reaction kettle, heat to 80°C, and react for 3 hours, collect under reduced pressure to obtain 155g of methyl Hydroxypropyl acrylate (96% yield, 99.2% purity).

Embodiment 3

[0019] Add 100g of methacrylic acid to the reaction kettle, then add 7g of magnetic zeolite molecular sieve, stir evenly, then add 64g of propylene oxide, close the reaction kettle, heat to 83°C, react for 2 hours, and collect 154g of methyl alcohol by distillation under reduced pressure. Hydroxypropyl acrylate (97.5% yield, 99.0% purity).

[0020] Catalyst recovery and reuse: Electromagnets are used to recover the magnetic zeolite molecular sieve in the reaction liquid, the recovered magnetic zeolite molecular sieve is washed with water and then calcined at 180-200°C for 2-3 hours, and after the magnetic zeolite molecular sieve is recovered and recycled 8 times, the methacrylic acid The productive rate of hydroxypropyl ester can still reach more than 93%.

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PUM

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Abstract

The invention discloses a synthetic method of hydroxypropyl methacrylate. The synthetic method comprises the following steps of: adding methacrylic acid to a reaction kettle; adding magnetic zeolite molecular sieve; adding epoxy propane after uniformly stirring; heating up the reaction kettle to 80 DEG C-85 DEG C for reacting for 2 hours-3hours; distilling to obtain the hydroxypropyl methacrylate. According to the synthetic method of the hydroxypropyl methacrylate disclosed by the invention, polymerization inhibitor is not needed to be used after using the magnetic zeolite molecular sieve as the catalyst, so that the separation and purification of the product are facilitated. Moreover, the yield of the hydroxypropyl methacrylate can reach 96% or more and the catalyst can be recycled, so that the synthesis cost is lowered.

Description

Technical field [0001] The present invention specifically involves a synthetic method for methyl hydroxyl acetal. Background technique [0002] Methyl hydroxyl acetraphyate (CAS: 27813-02-1) is a functional monomer with lively and lively.The cross -linking functional group monomer of acrylic resin. [0003] Methyl hydrogen hydroxyl ester is obtained by reactions under the presence of catalysts in the presence of catalysts. In order to prevent polymerization of material methacrylate during the reaction process, the reaction usually needs to be added with polychenols, such as benzylinol, methyl -base,Pipopenols, sulfide, sulfide, phenolzine, phenyl diol monoethyls, and phenyl -hydroxythexyl ether. The commonly used catalysts are pyridine, methane aluminum, metal salt of metal salt, organic chromium, and organic chromiumCompounds, three -valent iron salt or organic iron compounds, organic phosphorus or vulcanized compounds, such as CN102584580A to disclose a preparation process of m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/54C07C67/26
CPCY02P20/584
Inventor 陈国良
Owner NANTONG JUJIU NEW MATERIAL SCI & TECH CO LTD
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