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Manufacture of key equipment for aromatics production technology


Summary:

Ruihua aromatics production technology can be used to produce benzene, toluene, xylene products. This technology is highly adaptable to the market, and the product plan can be adjusted according to demand, making it very competitive in small and medium-sized industrial applications.


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Manufacture of key equipment for aromatics production technology
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Detailed description


Overview

Ruihua aromatics production technology can be used to produce benzene, toluene, xylene products. This technology is highly adaptable to the market, and the product plan can be adjusted according to demand, making it very competitive in small and medium-sized industrial applications.

The technical raw material can start from benzene, can also start from toluene. When the starting material is benzene, benzene is first alkylated with methanol to produce toluene, toluene is then disproportionated to produce high-concentration crude p-xylene and benzene, benzene is recycled, crude p-xylene is refined by crystallization, and the final products are high-purity p-xylene, mixed xylene and a small amount of C9 aromatic hydrocarbons; when the starting material is toluene, toluene is directly disproportionated to produce crude p-xylene and benzene, the product scheme is high purity p-xylene, benzene, mixed xylene and a small amount of C9 aromatic hydrocarbons.

The technology consists of two parts: benzene and methanol alkylation and toluene shape-selective disproportionation. The configuration of the alkylation and disproportionation sections can be matched according to the scale, or different ratios can be used according to the plant conditions.

 

Key Equipment

The key equipment of the process is shown in the figure, as shown in the table below:

a

 

Serial Number Equipment Name Main material of equipment Container Category Remarks
1 disproportionation bed reactor 15CrMoR III  
2 benzene heater Q345R/16MnII/20 II  
3 Toluene column reboiler Q345R/16MnII/20 II  
4 Inlet and outlet heat exchanger 15CrMoR/15CrMo II  
5 Hydrocarbonization inlet and outlet heat exchanger 15CrMoR/15CrMo II  
6 Toluene pre-evaporator Q345R/16MnII/20 II  
7 alkylation reactor 15CrMoR III  
8 falling film crystallizer S30408 S30408 II II  
9 Finished product melting heater Q345R,20,16Mn II I  
10 High pressure propylene tank S30408 II  
11 Benzene feed preheater Q345R  16MnII 20    
12 static crystallizer S30408    
13 coarse grain melting heater Q345R,20,16Mn II    
14 Cold Recycler S30408,S30408 II Q345R,20,20 Ⅱ    
15 Mother liquor discharge heater S30408 Q345R 16Mn Ⅱ    
16 refrigerant cooler S30408 S30408 II    
17 Crystallization feed tank Q345R    
18 Methanol buffer tank Q345R    

 

Application example

Petroleum benzene or coking benzene can be used as benzene for alkylation. Raw material methanol shall meet the requirements of GB 338-2011.

Major customers in recent years:

Serial Number Project Name Delivery time Remarks
1 Dongming CITIC Guoan Ruihua New Materials Co., Ltd. 200000 tons/year methanol to mixed aromatics unit 2017.12  

 

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