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Method for cleanly producing methoxyl propanediol acrylate and analogs thereof

A technology of methoxy propylene glycol acrylate and methoxy dipropylene glycol acrylate, which is applied in the field of light-curing materials, can solve the problems of high processing cost, environmental pollution of water bodies, and high manufacturing cost, and achieves guaranteed yield, quality, and yield. High and environmental benefits

Active Publication Date: 2014-06-11
JIANGSU LITIAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] ①Most of the catalysts used are sulfuric acid, p-toluenesulfonic acid, methanesulfonic acid and other catalysts, which are usually removed by neutralization, water washing, and layering methods, which will produce a large amount of industrial organic wastewater and pollute the water environment;
[0005] ② During the reaction process, the excess (8%-15%) acrylic acid is completely washed away by water, and is usually removed by neutralization, water washing, and layering methods, which will produce a large amount of industrial organic wastewater with high COD, which is difficult to treat and has high treatment costs. The problem makes the product more expensive to manufacture;
[0006] ③While neutralizing and washing with water, some acrylate products will be taken away, which will reduce the yield and increase the cost

Method used

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  • Method for cleanly producing methoxyl propanediol acrylate and analogs thereof
  • Method for cleanly producing methoxyl propanediol acrylate and analogs thereof
  • Method for cleanly producing methoxyl propanediol acrylate and analogs thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Put 500 kg of toluene, 290 kg of cyclohexane, 536.5 kg of methoxypropylene glycol (90 molecular weight), 463.5 kg of acrylic acid, 8 kg of p-hydroxyanisole, 4 kg of hypophosphorous acid, and 55 kg of p-toluenesulfonic acid into the 3000L reactor ; Turn on stirring, continuously feed compressed air into the kettle through the distributor at the bottom of the kettle, raise the temperature to 85-95°C and start reflux dehydration, the esterification reaction is 9-10 hours, the kettle temperature is 95-105°C, when the reflux dehydration reaches anhydrous When the acid value is 10-25mgKOH / g, after the reaction is over, cool to 40°C; add 25 kg of caustic soda and 60 kg of water, and stir for 30 minutes; add 6 kg of magnesium polysilicate, stir and absorb for 30 minutes; Above -0.098MPa, water and solvent are distilled under reduced pressure at 50-95°C. After the recovered water and solvent are separated, the water can be used directly in the next neutralization without any trea...

Embodiment 2

[0043] Put 585 kg of cyclohexane, 957.6 kg of methoxydipropylene glycol (molecular weight 148), 512.4 kg of acrylic acid, 6 kg of p-hydroxyanisole, 3 kg of sodium hypophosphite, and 30 kg of methanesulfonic acid into the 3000L reactor; start stirring , continuously feed compressed air into the kettle through the distributor at the bottom of the kettle, raise the temperature to 80-85°C and start reflux dehydration, the esterification reaction is 10-12 hours, the kettle temperature is 85-92°C, when the reflux dehydration reaches no water, the detection The acid value is 10-25mgKOH / g. After the reaction is over, cool to 40°C; add 32 kg of caustic soda and 75 kg of water, and stir for 30 minutes; add 6.5 kg of magnesium polysilicate, stir and absorb for 30 minutes; Above, water and solvent are distilled under reduced pressure at 50-95°C; after the recovered water and solvent are separated, the water can be used directly in the next neutralization without any treatment, and the solv...

Embodiment 3

[0045] Put 162 kg of methylcyclopentane, 198 kg of toluene, 1269 kg of methoxytripropylene glycol (molecular weight 206), 466 kg of acrylic acid, 7.2 kg of p-hydroxyanisole, 1.8 kg of hypophosphorous acid, and 1.8 kg of methanesulfonic acid into the 3000L reactor. 25.6 kg; start stirring, continuously feed compressed air into the kettle through the distributor at the bottom of the kettle, heat up to 85-95°C and start reflux dehydration, esterification reaction for 9-10 hours, kettle temperature 95-105°C, when reflux dehydration to no When the water comes out, the acid value is detected to be 10-25 mgKOH / g. After the reaction is over, cool to 40°C; add 43 kg of caustic soda and 108 kg of water, and stir for 30 minutes; add 17.3 kg of magnesium polysilicate, stir and absorb for 30 minutes; Vacuum degree above -0.098MPa, water and solvent are distilled under reduced pressure at 50-95°C. After the recovered water and solvent are separated, the water can be used directly in the next...

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Abstract

The invention discloses a method for cleanly producing methoxyl propanediol acrylate, methoxyl dipropylene glycol acrylate or methoxyl tripropylene glycol acrylate. The method comprises the following steps of: (1) refluxing and dehydrating methoxyl propanediol / methoxyl dipropylene glycol / methoxyl tripropylene glycol, acrylic acid, catalyst, solvent, polymerization inhibitor and antioxidant; (2) adding caustic soda flakes and little water for neutralizing; (3) adding magnesium polysilicate adsorbent to adsorb salt which is generated in neutralization; (4) dehydrating in reduced pressure, and removing solvent; (5) performing filter pressing to filter the magnesium polysilicate and the salt adsorbed by the magnesium polysilicate; (6) adding basic calcium-based bentonite and calcium oxide for decoloring and removing trace water and trace acid; (7) performing filter pressing; and (8) detecting product indexes. The invention is the method for cleanly producing methoxyl propanediol acrylate, methoxyl dipropylene glycol acrylate or methoxyl tripropylene glycol acrylate with economical benefit and environmental benefit, and the problem of organic wastewater contamination in the producing process can be fundamentally solved.

Description

technical field [0001] The invention belongs to the field of light-curing materials, and relates to a clean production method of methoxypropylene glycol acrylate and analogues thereof. Background technique [0002] With the rapid development of science and technology and the strict restrictions on solvents in environmental protection regulations, more and more people pay attention to photocurable polymer materials. Light-curing materials have excellent properties such as fast curing, low energy consumption, less pollution, and high efficiency, so they are widely used in coatings, printing, and electronics industries, and have developed rapidly in recent years. Methoxypropylene glycol acrylate (MPGA), methoxydipropylene glycol acrylate (MDPGA) or methoxytripropylene glycol acrylate (MTPGA) is a new class of photocurable materials - monofunctional photocurable monomers with Low viscosity, low irritation, fast curing speed, strong dilution, high transparency and other excellen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/54C07C67/08C07C67/56
Inventor 胡剑飞张本田张丽丽张兵
Owner JIANGSU LITIAN TECH
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