Method for preparing high-purity propane, iso-butane and n-butane

A technology of isobutane and n-butane, which is applied in the field of preparation of high-purity propane, isobutane and n-butane, can solve the problems of high olefin content and large hydrogen consumption, and achieve strong raw material adaptability and high processing capacity Large, consistent quality effects

Inactive Publication Date: 2012-08-15
NANJING MAISEN SCI & TECH DEV
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  • Claims
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Problems solved by technology

The olefin content of the raw material selected by this method is relatively ...

Method used

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  • Method for preparing high-purity propane, iso-butane and n-butane
  • Method for preparing high-purity propane, iso-butane and n-butane
  • Method for preparing high-purity propane, iso-butane and n-butane

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Embodiment Construction

[0034] Below in conjunction with embodiment specifically set forth the embodiment of the present invention

[0035] 1. Raw material preparation

[0036] ① After propylene extraction, etherification, and aromatization, the remaining mixed C4 is used as hydrogenation feedstock. The composition of an aromatization tail gas is shown in Table 1, in which the mass content of total olefins is 6.255%, and the mass content of total alkanes is 93.275%. , carbon five mass content 0.415%;

[0037] Table 1

[0038]

[0039] ②Hydrogen, cylinder hydrogen, purity ≮99.0wt%

[0040] ③Hydrogenation device and process

[0041] ④Hydrogenation operating conditions: The total filling volume of hydrogenation catalyst is 2.0L, including 0.25L of auxiliary agent, 1.75L of main agent, and the volume space velocity of main agent is 8.0h -1 , Catalyst inlet temperature 185°C, hydrogen oil ratio 500v / v, inlet pressure 1.6MPa

[0042] ⑤The result of continuous operation for 1500h

[0043] (1) Chan...

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Abstract

The invention discloses a method for preparing high-purity propane, iso-butane and n-butane. The method for preparing high-purity iso-butane and n-butane comprises the following steps of: hydrogenating mixed carbon 4 subjected to propylene extraction, etherification and aromatization, and separating the product, wherein olefins are respectively less than 0.5 percent, and the hydrogenating catalyst is a special catalyst comprising a common non-noble metal main catalyst and a noble metal cocatalyst. By adopting a process of hydrogenation and rectification in the method, the obtained alkane components have high purity; and compared with simple thermal processing, the method has the advantages that the method saves a large quantity of investment and is low in operation cost, high in flexibility, flexible and convenient and the products completely meet downstream chemical processes and have remarkable economic benefits.

Description

technical field [0001] The present invention relates to a comprehensive deep utilization of carbon 4 technology, which uses the tail gas processed by propylene extraction, etherification, aromatization and other units as raw material, and saturates the olefins in the tail gas through deep hydrogenation to obtain propane and isobutane And n-butane three alkanes mixture, further efficient separation of the mixture to obtain high-purity alkane monomers, the properties of monomers meet the requirements of chemical raw materials or compressed gas specifications, it is a combined technology for efficient energy utilization, with significant economic benefits. Background technique [0002] Carbon 4 generally refers to a large amount of C by-products in the process of petroleum refining and petrochemical production. 4 Hydrocarbons, including n-butane, isobutane, n-butene, isobutene, and butadiene. Before the 1980s, petroleum refining especially C from catalytic cracking units 4 Th...

Claims

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Application Information

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IPC IPC(8): C07C7/163C07C9/08C07C9/12C07C9/10C07C7/04
Inventor 冯秋庆高启秀丁韦
Owner NANJING MAISEN SCI & TECH DEV
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