Utilization method of butadiene extraction device residue

An extraction device and butadiene technology, which is applied in the field of utilization of butadiene extraction device residues, can solve the problems that can only be counted by months or even weeks, the processing capacity of the hydrogenation device is large, and the catalyst loses its activity. Achieve the effect of improving utilization rate, good performance and inhibiting the generation of polymer

Inactive Publication Date: 2005-03-09
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

But all there is same shortcoming in described pre-hydrogenation process: the processing capacity of hydrogenation unit is big, and lost part butadiene inevitably
Because the concentration of alkyne and butadiene in the material is too high, the general process will gradually lose its activity after a period of operation, and the life of the catalyst can only be counted in months or even weeks, and the reaction of diene and alkyne The polymerization of hydrocarbons is also relatively serious, so the post-hydrogenation is rarely reported

Method used

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  • Utilization method of butadiene extraction device residue
  • Utilization method of butadiene extraction device residue

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Embodiment 1

[0039] The feed in this embodiment is a material rich in alkynes. The alkyne hydrogenation reactor uses a palladium-copper-silver polymetallic catalyst, the content of which is 0.2wt% of palladium, 9.5wt% of copper, and 0.2wt% of silver, and the catalyst carrier is alumina , The hydrogenation reactor is a two-stage adiabatic fixed-bed reactor, the inlet temperature of the first stage bed is 18℃, the inlet temperature of the second stage bed is 25℃, the pressure is 2.5MPa, and the liquid volumetric space velocity of high alkyne materials is 2.0h -1 , The hydrogen enters the first stage bed and the second stage bed separately in two ways. The molar ratio of hydrogen to alkyne in each stage bed is 1:1~2:1, and the circulation ratio is 18:1. Table 1 lists the materials before and after the reaction. composition.

[0040]

[0041] In the hydrogenation process of alkynes, in addition to the hydrogenation of alkynes, 1,3-butadiene can be hydrogenated to 1-butene, butyne is hydr...

Embodiment 2

[0046] The feed in this embodiment is a material rich in alkynes. The alkyne hydrogenation reactor uses a palladium-copper bimetallic catalyst with a content of 0.2wt% palladium and 9.5wt% copper. The catalyst carrier is alumina, and the hydrogenation reactor is Single-stage adiabatic fixed-bed reactor, the bed inlet temperature is 22℃, the pressure is 2.0MPa, and the liquid volumetric space velocity of high alkyne materials is 2.0h -1 The molar ratio of hydrogen to alkyne is 1:1 to 2:1, and the recycle ratio is 13:1. Table 2 lists the composition of the materials before and after the reaction.

[0047]

[0048] It can be seen from Table 3 that after 1000 hours of operation, the catalyst still has good activity and stability. The residual alkyne content is below 0.8w%, the alkyne conversion rate is above 98w%, and the butadiene and 1-butene remain relatively stable. High yield.

[0049] The resulting product is sent to a butadiene hydrogenation reactor, using a catalys...

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Abstract

A process for reclaiming the residue of butadiene extractor features that said residue rich in acetylene hydrocarbon is selectively hydrogenated under the action of catalyst in the fixed-bed hydrogenating reactor with circulating device to generate fuel, and recover 1-butene and monoolefin.

Description

Technical field [0001] The invention relates to a method for utilizing residual alkyne-rich mixed hydrocarbons from a butadiene extraction device. In particular, it relates to one, two or more fixed-bed hydrogenation reactors with a circulating device, so that a mixture rich in alkyne is selectively hydrogenated under the action of a catalyst to react hydrogen with alkyne or even butadiene. Remove alkynes and even butadiene, and combine different numbers of reactors and control different process conditions according to different needs, so that the reaction products can be used as fuels, and 1-butene and other monoolefins can be further recovered. It can only be returned to the 1-butene unit to recover 1-butene. Background technique [0002] Saturated hydrocarbons such as ethane, propane, butane, etc.; unsaturated hydrocarbons, such as ethylene, propylene, butadiene, butene, etc.; and highly unsaturated hydrocarbons, such as Acetylene, propyne, butyne, vinyl acetylene, etc. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C5/02C07C11/02
Inventor 王迎春崔云梓张金永陈国鹏高步良郝兴仁魏建刚王林宏
Owner CHINA PETROLEUM & CHEM CORP
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