Process for producing trihydroxy methyl propane triacrylate

A technology of trimethylolpropane triacrylate and a production method, which is applied in the production field of trimethylolpropane triacrylate, can solve the problems of unstable product quality, low reaction efficiency, pollution of operation environment and the like, and achieves product quality The effect of maintaining stability, improving reaction efficiency and reducing production costs

Active Publication Date: 2007-02-07
JIANGSU LITIAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there are many disadvantages: 1. the production environment is poor, and a large amount of volatile toluene or benzene is used as a solvent, which causes great pollution to the operating environment; The volatilization of toluene, neutralization of acrylic acid removed by washing, incompletely reacted raw materials and intermediates, catalysts and auxiliary raw materials used--alkali, etc., all greatly increase production costs; ④The reaction efficiency is low, and the reaction cycle of the traditional process is long. Low efficiency and complex post-reaction procedures; ⑤ The product quality is unstable, because the traditional process uses many procedures, the product is a heat-sensitive product, the longer the time, the more procedures the more difficult it is to guarantee its quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0014] First put the following weights of raw materials into the reactor,

[0015] Trimethylolpropane 35%~42% (Example 35%, 38%, 40%, 42%)

[0016] p-Hydroxyanisole 1000ppm~1500ppm (eg 1000ppm, 1200ppm, 1500ppm)

[0017] Hydroquinone 400ppm~600ppm (eg 400ppm, 500ppm, 600ppm)

[0018] The balance is acrylic acid; and the catalyst is fixed on a fixed catalytic bed, and the catalyst is organic phosphine molybdenum heteropolyacid (or its salt) and SO 4 2- / TiO 2 -La 2 o 3 -ZrO 2 A solid composite catalyst composed of type solid superacid, organic phosphine molybdenum heteropolyacid (or its salt) and SO 4 2- / TiO 2 -La 2 o 3 -ZrO 2 The weight ratio of the type solid superacid is 1:0.1~10 (eg 1:0.1, 1:1, 1:10). Then turn on the switch of the air distributor, stabilize the air flow rate at 120-160L / h, then start to stir and slowly raise the temperature, and constantly observe the dissolution status of the materials in the reaction chamber. Metering pump, the initial con...

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Abstract

The present invention discloses the production process of trihydroxy methyl propane triacrylate. Trihydroxy methyl propane triacrylate is produced through reaction of trihydroxy methyl propane, p-hydroxyphenyl methyl ether, hydroquinone and acrylic acid under the presence of catalyst. The catalyst is composite solid catalyst comprising organic phosphine, Mo, heteropoly acid or its salt and superstrong solid acid. The present invention has improved environment, less produced waste water, low production cost, raised reaction efficiency, and high and stable product quality.

Description

Technical field: [0001] The invention relates to a production method of trimethylolpropane triacrylate. Background technique: [0002] The production method of existing trimethylolpropane triacrylate all adopts the method for acid-alcohol direct esterification, with excess acrylic acid, toluene or benzene as water-carrying solvent, sulfuric acid or p-toluenesulfonic acid as catalyzer, after reaction finishes , must be removed by neutralization and water washing process, a large amount of residual acid and catalyst, and finally a large amount of solvent is evaporated. Therefore, there are many disadvantages: 1. the production environment is poor, and a large amount of volatile toluene or benzene is used as a solvent, which causes great pollution to the operating environment; The volatilization of toluene, neutralization of acrylic acid removed by washing, incompletely reacted raw materials and intermediates, catalysts and auxiliary raw materials used--alkali, etc., all great...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/54C07C67/08
Inventor 张本田刘建华徐聪耘
Owner JIANGSU LITIAN TECH
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