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Method for preparing pentane by using hydrogenation on distillation of petroleum carbon five

A technology for the preparation of petroleum carbon five fractions and hydrogen, which is applied in the fields of hydrogenation, organic chemistry, etc., to achieve the effect of mild process conditions

Inactive Publication Date: 2004-05-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for preparing pentane by hydrogenation of petroleum carbon five fractions. The technical problem to be solved is that diolefins can be extracted and isopentene is separated by methyl tert-amyl ether cracking method to obtain The raffinate C5 is used as a raw material to produce high-purity pentane through hydrogenation reaction. The catalyst used is required to be not easily poisoned by oxygen-containing groups, and has a higher pentane yield, thereby overcoming the existing problems of the prior art. defect

Method used

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  • Method for preparing pentane by using hydrogenation on distillation of petroleum carbon five

Examples

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Embodiment 1

[0031] The average particle size is 3mm, the specific surface area is 160-220m 2 / g of spherical alumina carrier was placed in an oven, the temperature was set to 150°C, maintained for 5 hours, and then cooled to room temperature in a dry environment.

[0032] The above-mentioned dried alumina carrier is put into 40 g palladium chloride-sodium hydroxide dilute solution with a palladium chloride concentration of 1.25 wt %, soaked for 15-20 hours, and then dried in high-temperature air for 2-3 hours. Then put the carrier into 60 g of 27 wt % ammonium molybdate solution and soak for 15 to 20 hours. The carrier loaded with the active component is dried at 120°C and then calcined at 400°C for 2-3 hours.

[0033] The obtained catalyst active components are: palladium: 0.3wt%, molybdenum: 0.8wt%.

Embodiment 2

[0035] The ammonium molybdate solution in Example 1 was replaced by a mixed aqueous solution of 29wt% ammonium molybdate and 2wt% copper nitrate, and the rest were the same as in Example 1.

[0036] The obtained catalyst active components are: palladium: 0.3wt%, molybdenum: 0.9wt%, copper 0.02wt%.

Embodiment 3

[0038] The ammonium molybdate solution in Example 1 was replaced by a mixed aqueous solution with a concentration of 24wt% ammonium molybdate and 2wt% zinc nitrate, and the rest were the same as in Example 1.

[0039] The obtained catalyst active components are: palladium: 0.3wt%, molybdenum: 0.7wt%, zinc: 0.05wt%.

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Abstract

A process for preparing pentane by hdyrogenating the C5 fraction of petroleum features that under existance of catalyst, the C5 fraction takes part in hydrogenating reaction at 40-300 deg.C and 0.3-10 / hr under 0-5 MPa to obtain high-purity pentane. Said catalyst is composed of Al2O3 as carrier and active components including Pd and A chosen from Mo, Cu and Zn.

Description

technical field [0001] The invention relates to a method for preparing alkanes by hydrogenation of unsaturated hydrocarbons, in particular to a method for preparing pentane by hydrogenation of petroleum carbon five fractions containing unsaturated hydrocarbons. Background technique [0002] A considerable amount of C5 fractions are produced in the process of petroleum cracking to ethylene production. The comprehensive utilization of C5 fractions is an effective way to improve the economic benefits of ethylene production. At present, the comprehensive utilization of C5 fractions is mainly to separate C5 to obtain diolefins such as isoprene and piperylene, as well as isopentene with high application value. Since the C5 fraction contains many compounds with very close boiling points, it is not easy to separate isopentene from it by general separation methods. The five fractions react with methanol first to form methyl tert-amyl ether, and then undergo high-temperature cracking...

Claims

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Application Information

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IPC IPC(8): C07C5/03C07C9/15
Inventor 马洪玺刘建成陈洪军陈丽华
Owner CHINA PETROLEUM & CHEM CORP
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