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.

Classification:

Core Equipment

Key words:

Manufacture of key equipment for aromatics production technology

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Detailed description

Overview

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:

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