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Production method of high-purity furfuryl alcohol

A production method and high-purity technology, applied in the production field of high-purity furfuryl alcohol, can solve problems such as low product quality, different quality of furfuryl alcohol, and affecting the quality of furfuryl alcohol, and achieve the effects of strong safety and reliability, stable product quality, and high product quality

Inactive Publication Date: 2012-04-18
KOCEL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the production of furfuryl alcohol has the following defects: 1) During the production of furfuryl alcohol, the operator controls the amount of steam according to the reaction temperature to stabilize the production process
Due to the use of artificial control, the level of operator control directly affects product quality; 2) During the production of furfuryl alcohol, the operator controls the amount of hydrogen returned according to the system pressure to maintain the system pressure. Since the system pressure affects product quality, the furfuryl alcohol produced by different operators The quality is different; 3) The detection of temperature points in the production process of furfuryl alcohol is generally designed at the bottom and top of the tower, which cannot directly reflect the reaction situation in the reaction tower
The change of reaction temperature in the tower directly affects the quality of furfuryl alcohol, and there are certain safety hazards; 4) Rectification adopts batch rectification, and the by-products such as tetrahydrofurfuryl alcohol in crude furfuryl alcohol cannot be separated, and the product quality is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment one: a kind of production method of high-purity furfuryl alcohol, it comprises the steps:

[0020] The weight percentage of its raw materials is: furfural 96%, catalyst 1%, hydrogen 3%

[0021] a. After the furfural and the catalyst in the weight content are evenly mixed, the injection pump is pressurized to 7-9MPa, and the preheater is preheated to 130-150°C before entering the reaction tower;

[0022] b. Start the hydrogen compressor to increase the hydrogen pressure of the weight from 1Mpa to 7-9Mpa, control the temperature at the bottom of the reaction tower to 190-205°C through the amount of steam in the preheater, and control the temperature at the top of the tower to be lower than 145°C through the amount of cooling water at the top of the tower. ℃, control the system pressure to 7.4-7.9Mpa by returning hydrogen;

[0023] c. After furfural and hydrogen are reacted through the above controls in the reaction tower, they are cooled to the high-pressure s...

Embodiment 2

[0027] Embodiment two: a kind of production method of high-purity furfuryl alcohol, it comprises the steps:

[0028] The weight percentage of its raw materials is: furfural 96.5%, catalyst 1.2%, hydrogen 2.3%

[0029] a. After the furfural and the catalyst in the weight content are evenly mixed, the injection pump is pressurized to 7-9MPa, and the preheater is preheated to 130-150°C before entering the reaction tower;

[0030] b. Start the hydrogen compressor to increase the hydrogen pressure of the weight from 1Mpa to 7-9Mpa, control the temperature at the bottom of the reaction tower to 190-205°C through the amount of steam in the preheater, and control the temperature at the top of the tower to be lower than 145°C through the amount of cooling water at the top of the tower. ℃, control the system pressure to 7.4-7.9Mpa by returning hydrogen;

[0031] c. After furfural and hydrogen are reacted through the above controls in the reaction tower, they are cooled to the high-pres...

Embodiment 3

[0035] Embodiment three: a kind of production method of high-purity furfuryl alcohol, it comprises the steps:

[0036] The weight percent of its raw materials is: furfural 96.8%, catalyst 0.3%, hydrogen 2.9%

[0037] a. After the furfural and the catalyst in the weight content are evenly mixed, the injection pump is pressurized to 7-9MPa, and the preheater is preheated to 130-150°C before entering the reaction tower;

[0038] b. Start the hydrogen compressor to increase the hydrogen pressure of the weight from 1Mpa to 7-9Mpa, control the temperature at the bottom of the reaction tower to 190-205°C through the amount of steam in the preheater, and control the temperature at the top of the tower to be lower than 145°C through the amount of cooling water at the top of the tower. ℃, control the system pressure to 7.4-7.9Mpa by returning hydrogen;

[0039] c. After furfural and hydrogen are reacted through the above controls in the reaction tower, they are cooled to the high-press...

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Abstract

The invention relates to a production method of furfuryl alcohol, in particular to a production method of high-purity furfuryl alcohol. The method is characterized by comprising the following steps of: uniformly mixing furfuryl alcohol with a catalyst; boosting to 7-9 MPa with an injection pump; preheating to 130-150 DEG C with a preheater and entering a reaction tower; starting a hydrogen compressor; raising the hydrogen pressure from 1 MPa to 7-9 MPa; controlling the bottom temperature of the reaction tower at 190-205 DEG C through the steam amount of the preheater; controlling the top temperature of the tower to be lower than 145 DEG C through the tower top cooling water amount; controlling the pressure of a system at 7.4-7.9 MPa through the return hydrogen amount; reacting the furfuryl alcohol and hydrogen in the reaction tower under control; cooling with a condenser and feeding into a high-pressure separator; discharging crude furfuryl alcohol from the lower part of the main high-pressure separator; discharging the crude furfuryl alcohol into a temporary storage groove through a low-pressure separator; and settling the crude furfuryl alcohol for 24 hours, separating the catalyst out by using the separator, and entering continuous rectification to obtain high-purity furfuryl alcohol of which the purity is over 98.5 percent. In the production method, low free furfuryl alcohol is produced, high intensity is achieved, and the production procedure is environmentally-friendly and free from three wastes.

Description

technical field [0001] The present invention relates to a production method of furfuryl alcohol, in particular to a production method of high-purity furfuryl alcohol. Background technique [0002] The production of furfuryl alcohol is mainly divided into two types: furfural high-pressure liquid-phase hydrogenation and normal-pressure gas-phase hydrogenation. Most of the domestic high-pressure liquid-phase hydrogenation is used, that is, furfural is in the presence of a catalyst. Reaction occurs after full contact with furfural. The production process is to pump furfural into the furfural high-level tank, then put it into the stirring tank and mix it with a certain amount of catalyst evenly, then enter the jacketed tubular reactor with a pressure of 7-9Mpa through the metering pump, and compress it with a hydrogen compressor to The 7-9Mpa hydrogen is preheated together and mixed at the inlet of the reactor. Generally, the temperature is controlled at 210-230°C, and then the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/44
Inventor 靳毅肖青国杨洋于立志何龙
Owner KOCEL GROUP
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