Method for removing isobutene from C4 hydrocarbon, and method for producing 1-butene and 2-butene

A technology for isobutene and carbon tetrahydrocarbons, applied in the field of isobutene removal, can solve the problems of large loss of 1-butene, loss of economic feasibility, unsuitability for 1-butene, etc., and achieve the effect of flexible operation

Active Publication Date: 2020-04-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the implementation of this plan, MTBE will not be added to gasoline, so it will lose economic feasibility to manufacture a large amount of MTBE, a large amount of isobutene needs to find other ways of utilization, and high-octane gasoline additive components need to be replenished in large quantities
[0005] The high-octane additive component of gasoline can be produced by isobutene selective stacking technology, but this technology is not suitable for the simultaneous production of polymer grade 1-butene because of the large loss of 1-butene when isobutene is fully converted (generally above 60%)
Therefore, if it is desired to achieve the purpose of separating 1-butene through isobutene selective superimposition technology, it is necessary to ensure that 1-butene does not participate in the reaction while removing isobutene, but due to the superposition reaction of butene and 1-butene The active center of the ene isomerization reaction is the acid center of the catalyst, so it is almost impossible to completely convert isobutene without 1-butene not participating in the reaction, and no effective solution to this problem is mentioned in the prior art

Method used

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  • Method for removing isobutene from C4 hydrocarbon, and method for producing 1-butene and 2-butene
  • Method for removing isobutene from C4 hydrocarbon, and method for producing 1-butene and 2-butene
  • Method for removing isobutene from C4 hydrocarbon, and method for producing 1-butene and 2-butene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] In a sleeve reactor with a specification of φ32mm×1000mm, 200mL of KC110 macroporous strong-acid cation exchange resin (produced by Hebei Kairui Environmental Protection Technology Co., Ltd., the same below) is loaded. The reaction tube has a hot water jacket and can be passed into Hot water at a specified temperature removes the heat of reaction to keep the temperature inside the reaction tube constant. At a pressure of 1.60MPa and a temperature of 50°C, the mixed C4 containing 0.8% (wt) tert-butanol (composed of propylene 0.0595wt%; propane 0.04666wt%; isobutane 26.3208wt%; n-butane 13.75944wt%; Anti-butene 13.18326wt%; 1-butene 13.74807wt%; Isobutene 24.55937wt%; Butene 8.10257wt%; . The outlet of the tubular reactor was analyzed on-line through the high-pressure sampling valve for product composition. According to the reaction results, it is calculated that the conversion rate of isobutene is 85.0%, the conversion rate of 1-butene is 10.5%, and the conversion rate...

Embodiment 2

[0104] Put 200mL SiO in the casing reaction with a specification of φ32mm×1000mm 2 -Al 2 o 3 Catalyst (Al content is about 15wt%), the reaction tube is equipped with a hot water jacket, and hot water of a specified temperature can be introduced to keep the temperature inside the reaction tube constant. Under the conditions of pressure 1.60MPa and temperature 65°C, carbon-mixed C4 (composed of 0.0595wt% propylene; 0.04666wt% propane; 26.3208wt% isobutane; 13.75944wt% n-butane; 13.18326wt% trans-butene; 1-Butene 13.74807wt%; Isobutene 24.55937wt%; Butene 8.10257wt%; C5 0.22033wt%), at 240g / h (volume space velocity 1h -1 ) rate into the tubular reactor for superposition reaction. The outlet of the tubular reactor was analyzed on-line through the high-pressure sampling valve for product composition. According to the reaction results, it is calculated that the conversion rate of isobutene is 88.5%, the conversion rate of 1-butene is 12.5%, and the conversion rate of cis-trans 2...

Embodiment 3

[0109] Attached figure 1 Shown technological process, set up the industrial test device of the present invention, the equipment specifications and operating conditions of each step are shown in Table 1.

[0110] Table 1 industrial experimental device of the present invention

[0111]

[0112] The main logistics data table 2 of the experimental device operation of the present invention.

[0113]

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Abstract

The invention provides a method for removing isobutene from C4 hydrocarbon, and a method for producing 1-butene and 2-butene. According to the present invention, the C4 hydrocarbon containing isobutene and 1-butene is adopted as the raw material, the isobutene in the C4 hydrocarbon is completely converted into the gasoline high octane number component so as to be removed, and the loss of the 1-butene is reduced to the minimum, so that the polymer grade 1-butene is produced, and the production of the large amount of MTBE can be avoided.

Description

technical field [0001] The invention relates to a method for removing isobutene from C4 hydrocarbons and a method for producing 1-butene and 2-butene. Background technique [0002] Both 1-butene and cis-trans 2-butene are important chemical raw materials. 1-butene is mainly used as a polymer monomer for the production of linear low-density polyethylene (LLDPE) and poly-1-butene plastics. The raw material of the product. Cis-trans 2-butene is an important raw material for the production of methyl ethyl ketone, alkylate and other products. [0003] 1-butene and cis-trans 2-butene are mainly derived from mixed C4 produced by catalytic cracking (FCC), catalytic cracking (DCC), steam cracking and other processes. The mixed carbon four contains various butene isomers, and their boiling points are very close, especially the difference between the boiling points of 1-butene ((b.p-6.26°C) and isobutene (b.p-6.9°C) is less than 1°C. Adopt conventional rectification method to separ...

Claims

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Application Information

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IPC IPC(8): C10G53/02C07C7/04C07C11/08C07C11/09
CPCC10G53/02C07C7/04C10G2300/305C10G2400/02C10G2300/1092C07C11/08C07C11/09Y02P20/10
Inventor 温朗友宗保宁夏玥穜郜亮张伟赵志海栗万博俞芳杜泽学董明会喻惠利
Owner CHINA PETROLEUM & CHEM CORP
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