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Production device and preparation method for synthesizing aminopropyltriethoxysilane by low-temperature low-pressure method

A technology of aminopropyltriethoxysilane and cyanoethyltriethoxysilane, which is applied in the field of production equipment and preparation, can solve the problems of pollutant discharge impact, high reaction temperature and reaction pressure, and reduce equipment investment costs , reduce the reaction temperature and pressure, improve the effect of production safety

Active Publication Date: 2019-03-26
江西宏柏新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a production device and preparation method for synthesizing aminopropyltriethoxysilane by a low-temperature and low-pressure method in order to solve the technical problems of high reaction temperature and reaction pressure in the existing method and pollutant discharge affecting the environment

Method used

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  • Production device and preparation method for synthesizing aminopropyltriethoxysilane by low-temperature low-pressure method

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specific Embodiment approach 1

[0031] Specific embodiment 1: This embodiment low-temperature low-pressure synthesis of aminopropyl triethoxysilane production device, the device includes a tubular reactor 1, a first hydrogen circulation compressor 2, a second hydrogen circulation compressor 14, hydrogen buffer Tank 3, raw material flow pump 4, liquid ammonia flow pump 5, SK static mixer 6, cooler 7, gas-liquid separator 8, liquid ammonia cooler 9, liquid ammonia storage tank 10, hydrogen storage tank 11, cyanoethyl The triethoxysilane storage tank 12 and the product receiving storage tank 13 are characterized by:

[0032] The upper end of the hydrogen storage tank 11 is connected to the side end of the first hydrogen circulating compressor 2, the upper end of the first hydrogen circulating compressor 2 is connected to the side end of the hydrogen buffer tank 3, the upper end of the hydrogen buffer tank 3 and one end of the SK static mixer 6 are connected to the pipe The upper end of the tubular reactor 1 is con...

specific Embodiment approach 2

[0033] Specific embodiment two: this embodiment is different from specific embodiment one in that the preparation method of low temperature and low pressure synthesis of aminopropyltriethoxysilane is as follows:

[0034] 1. Pack the magnetically immobilized catalyst filler in the tubular reactor 1, and increase the temperature in the tubular reactor 1 to 90°C;

[0035] 2. Turn on the first hydrogen circulating compressor 2, pass the hydrogen in the hydrogen storage tank 11 into the tubular reactor 1 through the hydrogen buffer tank 3, control the hydrogen pressure to 1.0MPa, and pass the raw material flow pump 4 to the cyanoethyl group Triethoxysilane is pumped into the tubular reactor 1 at a flow rate of 0.1t / h~0.25t / h, and at the same time, liquid ammonia is pumped at a flow rate of 0.1t / h~0.25t / h through the liquid ammonia flow pump 5. Into the tubular reactor 1, cyanoethyltriethoxysilane and liquid ammonia are uniformly mixed in the SK static mixer 6 and then enter the tubular ...

specific Embodiment approach 3

[0037] Specific embodiment three: This embodiment is different from the specific embodiment two in that the preparation method of the magnetically immobilized catalyst is as follows:

[0038] 1. Put 65 parts by mass of metallic nickel, 23 parts by mass of aluminum and 12 parts by mass of accelerator into a high-temperature furnace to obtain a uniformly mixed melt. The melt is quenched and quenched to obtain a quenched alloy, which is then crushed to a diameter of 0.1~0.5cm particles;

[0039] 2. The particles obtained in step 1 are leached from the alloy with sodium hydroxide solution with a mass concentration of 25% at 50°C, and the entire leaching process lasts 20-40 minutes;

[0040] 3. Wash the leached alloy treated in step 2 with ultrapure water, and at the same time pass hydrogen to activate the alloy, and then rinse with ethanol to obtain a modified catalyst;

[0041] 4. Using neodymium-iron-boron with rare earth dysprosium as the strong magnetic center, the modified catalyst i...

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Abstract

The invention relates to a production device and a preparation method for synthesizing aminopropyltriethoxysilane by a low-temperature low-pressure method and relates to a production device and a preparation method. In order to solve the technical problems that an existing method is high in reaction temperature and reaction pressure and discharged pollutants affect the environment, the device comprises a tubular reactor, a first hydrogen circulating compressor, a second hydrogen circulating compressor, a hydrogen buffer tank, a raw material flow pump, a liquid ammonia flow pump, an SK static mixer, a cooler, a gas-liquid separator, a liquid ammonia cooler, a liquid ammonia storage tank, a hydrogen storage tank, a cyanoethyl triethoxysilane storage tank and a product receiving storage tank.The method comprises the following steps: opening the first hydrogen circulating compressor to introduce hydrogen into the tubular reactor; pumping the cyanoethyl triethoxysilane and liquid ammonia into the tubular reactor to react; and discharging a material from a discharge port in the lower end of the tubular reactor. The production device and the preparation method do not pollute air and savethe treatment cost. By using a modified catalyst in the process, the reaction temperature and the reaction pressure are reduced greatly.

Description

Technical field [0001] The invention relates to a production device and a preparation method. Background technique [0002] Aminopropyltriethoxysilane is a colorless or light yellow transparent liquid, easily hydrolyzed, and is often used as a silane coupling agent in industrial fields such as paint processing, rubber production, glass fiber and sealant tackifiers. Has a wide range of applications. At present, the synthetic methods of aminopropyltriethoxysilane can be roughly divided into three types: [0003] 1) Ammonification method. Excess liquid ammonia reacts with chloropropyltriethoxysilane in an autoclave, and reacts at an absolute pressure of 5.0MPa for 6 hours. After completion, ammonium chloride is recovered. The liquid semi-finished product is purified by distillation tower to obtain KH-550 product. [0004] 2) Hydrogenation reduction method. Cyanoethyltriethoxysilane undergoes reduction reaction with hydrogen under high pressure and catalyst to obtain KH-550 product....

Claims

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Application Information

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IPC IPC(8): C07F7/18
CPCC07F7/1892Y02A50/20
Inventor 纪冠丞张磊李季
Owner 江西宏柏新材料股份有限公司
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