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A continuous reaction device and a method for synthesizing furfuryl mercaptan using the device

A reaction device, a technology for furfuryl mercaptan, which is applied in feeding devices, chemical instruments and methods, chemical/physical/physical-chemical stationary reactors, etc., can solve the problems of difficult control of reaction conditions, high cost, low yield, etc. , to achieve the effect of easy control of reaction conditions, low cost and simple operation

Active Publication Date: 2017-12-05
WUTONG AROMA CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a continuous reaction device and a method for synthesizing furfuryl mercaptan using the device, which overcomes the problems of high product cost, low yield and difficult control of reaction conditions in the prior art, and realizes efficient continuous production of products. Production

Method used

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  • A continuous reaction device and a method for synthesizing furfuryl mercaptan using the device
  • A continuous reaction device and a method for synthesizing furfuryl mercaptan using the device
  • A continuous reaction device and a method for synthesizing furfuryl mercaptan using the device

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Embodiment 1

[0059] The continuous reaction device of the present invention can be applied to various product types suitable for continuous reaction. This embodiment provides a continuous reaction device for preparing furfuryl mercaptan, such as figure 1 Shown, comprise mixed-flow reactor and flat-flow insulation reactor 4; Wherein:

[0060] The mixed-flow reactor includes a tube-and-tube reactor 3 , a Venturi mixer 2 and a lower head 1 connected to the bottom of the tube-and-tube reactor 3 .

[0061] The inside of the tubular reactor 3 includes several vertical pipes for material reaction, and there are accommodation (or communication) between the vertical pipes and between the vertical pipes and the wall of the tubular reactor. ) gaps for steam and / or cooling water; the aspect ratio of the vertical pipe (the ratio of length to diameter of the pipe) is 50:1.

[0062] Several parts for deflecting materials are arranged on the inner wall of the vertical pipe; the parts for deflecting mate...

Embodiment 2

[0076] A continuous reaction system for the production of furfuryl mercaptan, such as figure 2 Shown, at least comprise the continuous reaction device described in embodiment 1 (such as figure 1 shown), furfuryl alcohol storage tank 6, thiourea solution storage tank 7, thiourea solution storage tank 8, hydrochloric acid storage tank 9, sodium hydroxide aqueous solution storage tank 5, steam distiller 10, condenser 12, the first minute Stratifier 11, second stratifier 13 and crude product storage tank 14;

[0077] The furfuryl alcohol storage tank 6, the thiourea solution storage tank 7, the thiourea solution storage tank 8, and the hydrochloric acid storage tank 9 are connected to the Venturi mixer 2 in the continuous reaction device by a pump and a pipeline;

[0078] The outlet of the flat-flow heat preservation reactor 4 in the continuous reaction device is connected to the liquid inlet of the steam distiller 10 through the aqueous sodium hydroxide storage tank 5, and the ...

Embodiment 3

[0082] A kind of method adopting the continuous reaction device in embodiment 1 to synthesize furfuryl mercaptan may further comprise the steps:

[0083] (1) Prepare raw materials: mass concentration is 30% hydrochloric acid solution, furfuryl alcohol (content > 99%), thiourea by mass ratio: water=42:100 is mixed with saturated thiourea aqueous solution, mass concentration is 20% sodium hydroxide solution.

[0084] (2) Enter the hydrochloric acid solution, furfuryl alcohol and thiourea aqueous solution into the vertical pipeline in the mixed flow reactor according to the set ratio, and the flow ratio of the hydrochloric acid solution, furfuryl alcohol and thiourea aqueous solution entering the described flow mixer is 0.5 :0.5:(0.2~0.5), through steam heating and / or cooling of cooling water, hydrochloric acid, furfuryl alcohol and thiourea reach the required reaction temperature of 54~56°C, and part of hydrochloric acid, furfuryl alcohol and thiourea react to form furfuryl Iso...

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Abstract

The invention discloses a continuous reaction device and a method for synthesizing furfurylmercaptan by adopting the device. The device comprises a mixed flow reactor and a horizontal flow insulation reactor, wherein the mixed flow reactor comprises a shell and tube reactor, a venturi mixer and a lower seal head connected with the bottom of the shell and tube reactor; the interior of the shell and tube reactor comprises a plurality of vertical pipelines used for material reaction; gaps for containing steam and / or cooling water are formed among the vertical pipelines and / or between the vertical pipelines and the wall of the shell and tube reactor; a steam inlet, a cooling water inlet and a condensate water outlet are formed in the wall of the shell and tube reactor at least; the venturi mixer is communicated with the vertical pipelines in the shell and tube reactor by virtue of the lower seal head; a plurality of material outlets are formed in the wall of the horizontal flow insulation reactor; and the interior of the horizontal flow insulation reactor is communicated with the vertical pipelines in the shell and tube reactor. The continuous pipeline type reactor disclosed by the invention can be applied to various product types suitable for continuous reaction, such as process production of furfurylmercaptan, and high-efficiency continuous production of furfurylmercaptan can be realized.

Description

technical field [0001] The invention relates to a continuous reaction device and a method for synthesizing furfuryl mercaptan using the device. Background technique [0002] Furfuryl mercaptan, common name caffealdehyde, alias 2-thiofuran methanol, also known as furfuryl mercaptan, molecular formula: C 5 h 6 OS, the structural formula is: Furfuryl mercaptan is a naturally occurring spice that is allowed to be eaten internationally. Approved by the American Food Flavor and Extract Manufacturers Association of the International Fragrance, Flavor and Cosmetics Institute, its number: FEMA No 2493. It is an important aroma component of roasted coffee, with coffee aroma and coconut aroma, and is widely used in the deployment of coffee, chocolate and other aromas. It can be used in soft drinks, ice cream, iced food, candy, baked food, jelly, pudding, icing, etc. It is an important food flavoring. It has a wide range of applications, and is very mature and safe in food addition...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/24B01J19/02B01J4/00C07D307/38
CPCB01J4/001B01J19/02B01J19/2415B01J19/245B01J19/2465B01J2204/005B01J2219/00033B01J2219/00051B01J2219/185C07D307/38
Inventor 宋成斌卫洁陈祥臧传近李新
Owner WUTONG AROMA CHEM CO LTD
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