Method and device for pretreating post-etherification C4 raw material

A pretreatment device, the technology of C4 after ether, which is applied in chemical instruments and methods, ether preparation, hydrocarbons, etc., can solve the problems of high operation cost, complicated process, long process, etc., and achieve high promotion value and cost saving. , the effect of improving the economic efficiency of the industry

Pending Publication Date: 2019-09-20
山东东明石化集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the existing process flow is long, the process is complex, the investment is high, and the operating cost is high

Method used

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  • Method and device for pretreating post-etherification C4 raw material
  • Method and device for pretreating post-etherification C4 raw material
  • Method and device for pretreating post-etherification C4 raw material

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Experimental program
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Effect test

Embodiment 1

[0052] Please refer to figure 1 , figure 1 A process flow chart of a pretreatment method for C4 raw material after ether is shown in the present invention. The post-ether C4 raw material pretreatment device includes a dehydration treatment device, a deoxidation treatment device, a nitrogen cooler, an exhaust gas condenser and an empty tank.

[0053] In this embodiment, the dehydration treatment device is a dehydration tank 1, and each dehydration tank 1 is filled with a dehydrating agent; the deoxidation treatment device is a deoxidation tank 3, and each deoxidation tank 3 is filled with a deoxidizer.

[0054] The bottom of each dehydration tank 1 is connected with the feed pipeline of C4 after ether and the outlet pipeline of hot nitrogen, and the top of each dehydration tank 1 is connected with the inlet pipeline of hot nitrogen and the discharge pipe of C4 after dehydration road. A circulating dehydration pipeline for C4 after ether is also connected between the discharg...

Embodiment 2

[0078] Please refer to figure 2 , figure 2 It shows a process flow chart of another pretreatment method for post-ether C4 raw material of the present invention. The post-ether C4 raw material pretreatment device includes a dehydration treatment device, a deoxidation treatment device, a nitrogen cooler, an exhaust gas condenser and an empty tank.

[0079] In this embodiment, the dehydration treatment device is two dehydration tanks 1, that is, dehydration tank A and dehydration tank B. The two dehydration tanks 1 are arranged in parallel. During normal operation, a single dehydration tank is used, and the other is for standby; the dehydration treatment device is two dehydration tanks. Two deoxygenation tanks 3, i.e. deoxidation tank A and deoxidation tank B, are arranged in parallel, one deoxygenation tank runs during normal production, and the other is standby.

[0080] The pipeline switching process of the dehydration tank A is not repeated as described in Embodiment 1; t...

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Abstract

The invention relates to a method and device for pretreating a post-etherification C4 raw material, belonging to the technical field of treatment of chemical raw materials. The method comprises the following steps: dehydrating the post-etherification C4 raw material; subjecting the dehydrated post-etherification C4 raw material to deoxidation; regenerating a dehydrating agent used in dehydration; and regenerating a deoxidizer used in deoxidation. According to the pretreatment method of the invention, impurities such as micro water, ethers and alcohols in the post-etherification C4 raw material can be removed after dehydration and deoxidation, and the indexes of the pretreated post-etherification C4 raw material reach the requirements of n-butene isomerization units and selective hydrogenation units on the limit values of impurity contents of raw materials, so catalysts in the hydrogenation units and catalysts in the n-butene isomerization units are protected, and the normal operation cycle of the entire MTBE device is ensured; and compared with conventional pretreatment processes for raw materials, the method of the invention reduces investment and operating cost, improves the economic benefits of the industry and has a high promotion value.

Description

technical field [0001] The invention belongs to the technical field of chemical raw material treatment, and relates to a pretreatment method and device for post-ether C4 raw material. Background technique [0002] C4 after ether is a by-product of MTBE plant, mainly including 1-butene, n-butane, isobutane, cis-trans 2-butene and other components. In recent years, with the development of gas deep processing technology, C4 after ether has gradually changed from gaseous fuel in the traditional sense to chemical raw material, which is used to produce aromatized gasoline, alkylated gasoline, sec-butyl acetate, butanone, etc. product. At present, my country's post-ether C4 output is about 12.3 million tons / year, and the demand is about 32 million tons / year. According to the refinery's crude oil processing capacity of 10 million tons / year, it can produce about 300,000 tons of post-ether C4 per year. [0003] The n-butene isomerization unit is the upstream processing unit of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/06C07C43/04C07C7/00C07C7/12C07C11/08
CPCC07C41/06C07C7/005C07C7/12C07C43/046C07C11/08
Inventor 李湘平丁书兵杨树防夏伯恩石峰胡楠
Owner 山东东明石化集团有限公司
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