Production method of 3-methylthiophene and equipment

A technology for methylthiophene and production equipment, which is applied in the field of production methods and equipment for trimethylthiophene, can solve problems such as increased exhaust gas emissions, increased carbon dioxide, and low production capacity, and achieves less side reactions, safe production methods, and low reaction temperatures. Effect

Pending Publication Date: 2021-12-17
HUBEI UNIV OF ARTS & SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon dioxide protection is used in the production process, and the crude trimethylthiophene needs to be refined in one step, which not only increases the emission of carbon dioxide and other waste gases, but also increases the generation of waste residue, resulting in high pollution
The traditional enamel kettle batch reaction is used, which limits the product to high energy consumption, high pollution and low production capacity

Method used

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  • Production method of 3-methylthiophene and equipment
  • Production method of 3-methylthiophene and equipment
  • Production method of 3-methylthiophene and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Production method of the present invention comprises the following steps:

[0034] (1) Put 150kg of sulfur and 234kg of isoprene into the sulfur liquefaction device and the isoprene liquefaction device respectively, and after liquefaction, send them to the vaporization device for vaporization. The temperature of the heater used to heat liquid isoprene into gaseous state is 50°C, and the heater keeps feeding and heating continuously. The temperature of the sulfur melting tank used to melt solid sulfur into liquid sulfur is 130°C, and the temperature of the heater used to heat liquid sulfur into vapor state sulfur is 450°C. The processor continues to feed and heat continuously;

[0035] (2) The vaporized isoprene and sulfur enter the mixer 4 at a fixed mass ratio of 1:1.5 for full vaporization and mixing, and the mixed gas enters the tubular reactor; the working parameters of the tubular reactor are: pressure 0.2Mpa, Temperature 300-320°C, vaporization and mixing reactio...

Embodiment 2

[0039] Production method of the present invention comprises the following steps:

[0040] (1) Put 145kg of sulfur and 230kg of isoprene into the sulfur liquefaction device and the isoprene liquefaction device respectively, and after liquefaction, send them to the vaporization device for vaporization. The temperature of the heater used to heat liquid isoprene into gaseous state is 50°C, and the heater keeps feeding and heating continuously. The temperature of the sulfur melting tank used to melt solid sulfur into liquid sulfur is 130°C, and the temperature of the heater used to heat liquid sulfur into vapor state sulfur is 450°C. The processor continues to feed and heat continuously;

[0041] (2) The vaporized isoprene and sulfur enter the mixer 4 at a fixed mass ratio of 1:1.53 for full vaporization and mixing, and the mixed gas enters the tubular reactor; the working parameters of the tubular reactor are: pressure 0.3Mpa, Temperature 300-320°C, vaporization and mixing reacti...

Embodiment 3

[0045] Production method of the present invention comprises the following steps:

[0046](1) Put 148kg of sulfur and 240kg of isoprene into the sulfur liquefaction device and the isoprene liquefaction device respectively, and after liquefaction, send them to the vaporization device for vaporization. The temperature of the heater used to heat liquid isoprene into gaseous state is 50°C, and the heater keeps feeding and heating continuously. The temperature of the sulfur melting tank used to melt solid sulfur into liquid sulfur is 130°C, and the temperature of the heater used to heat liquid sulfur into vapor state sulfur is 450°C. The processor continues to feed and heat continuously;

[0047] (2) The vaporized isoprene and sulfur enter the mixer 4 at a fixed mass ratio of 1:1.56 for full vaporization and mixing, and the mixed gas enters the tubular reactor; the working parameters of the tubular reactor are: pressure 0.2Mpa, Temperature 300-320°C, vaporization and mixing reactio...

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Abstract

The invention relates to a production method of 3-methylthiophene and equipment thereof, and the production method comprises the following steps: sulfur is fed into a liquefier and liquefied, fed into a vaporizer II, vaporized, and fed the vaporized sulfur and vaporized isoprene into a mixer according to a ratio, a mixture is fully vaporized and mixed, the mixed gas is fed into a normal pressure tubular reactor filled with a catalyst, and synthesized to generate a 3-methylthiophene crude product; after the 3-methylthiophene crude product is discharged from the reactor, the trimethylthiophene crude product is cooled to below 80 DEG C through a cooler I, hydrogen sulfide gas is separated through a separator, and the hydrogen sulfide gas enters an alkali absorption tower to be absorbed; the trimethylthiophene from which the hydrogen sulfide gas is separated enters a rectifying tower to be refined, and after a certain reflux ratio is controlled, the tower top produced liquid is analyzed to be qualified, and is produced to enter a qualified product tank. The production method has the remarkable characteristics of simple process, safety and environmental protection.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a production method and equipment of trimethylthiophene. Background technique [0002] 3-Methylthiophene is an important organic chemical raw material, often used as a reagent for organic synthesis and widely used in synthetic fuels, medicines, pesticides, polymer additives, etc. , thiophene diammonium, pioneer mycin, etc., can also be used in color film production and special effects photography, and some derivatives can be used to separate neptunium, plutonium, americium, curium uranium and other metals with appropriate extraction agents. [0003] The existing production process uses sodium methyl succinate and phosphorus sulfide to react in the next step under the protection of carbon dioxide to synthesize 3-methylthiophene crude product, and refine it to obtain the finished product of 3-methylthiophene with a yield of more than 60%. The production equipment adopts en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D333/08
CPCC07D333/08
Inventor 田志高
Owner HUBEI UNIV OF ARTS & SCI
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