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Method for preparing isooctane by isobutene superposition-hydrogenation

A technology for isobutene and isooctane, which is applied in the field of isobutene superposition-hydrogenation to prepare isooctane, can solve the problem of not involving isooctane and the like, and achieve the effects of shortened residence time, long service life of catalyst and simplified process

Active Publication Date: 2020-06-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] In summary, the prior art does not involve the process of simultaneously carrying out the superposition reaction of isobutene and the hydrogenation reaction of isooctene in a single catalyst to prepare isooctane

Method used

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  • Method for preparing isooctane by isobutene superposition-hydrogenation

Examples

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Embodiment 1

[0049] The styrene-divinylbenzene macroporous sulfonic acid resin catalyst of loading 50mL load Pd in ​​the fixed-bed reactor, the dry basis acid amount of this catalyst is 3.5mol H + / kg, the dry basis Pd content is 0.7wt%. The specific surface area of ​​the catalyst is 36m 2 / g, the pore volume is 0.22mL / g, and the average pore diameter is 27nm. The catalyst was activated for 8 hours at a temperature of 110 °C, a pressure of 0.5 MPa, and a hydrogen flow rate of 4 mL / (min·mL catalyst) to complete the reduction and activation treatment. The raw material was mixed hydrocarbons with a weight ratio of isooctane / isobutene of 5:1. Based on the weight of the raw material, add 6wt% tetrahydrofuran to the raw material as a dimer selectivity regulator, mix it evenly, and mix it with the hydrogen flow, at a temperature of 80°C, a pressure of 0.8 MPa, and a hydrogen / isobutene molar ratio of 2.0 and the volumetric space velocity of the fresh raw material is 3.0h -1 Under certain reacti...

Embodiment 2

[0051] Use "methacrylic anhydride-methacrylic acid methanol macroporous sulfonic acid resin catalyst" to replace the "styrene-divinylbenzene macroporous sulfonic acid resin catalyst" in Example 1, and the remaining reaction conditions are the same as in Example 1 to start the reaction . The specific reaction results are shown in Table 1.

Embodiment 3

[0053] The "bisphenol-methacrylic acid epoxy macroporous sulfonic acid resin catalyst" was used to replace the "styrene-divinylbenzene macroporous sulfonic acid resin catalyst" in Example 1, and the rest of the reaction conditions were the same as in Example 1 to start the reaction. The specific reaction results are shown in Table 1.

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Abstract

The invention relates to a method for preparing isooctane through isobutene superposition-hydrogenation. The method comprises the step: making hydrogen and a raw material containing isobutene contacta superposition-hydrogenation bifunctional solid acid catalyst in a reactor to generate a superposition-hydrogenation reaction, wherein the superposition-hydrogenation bifunctional solid acid catalystadopted in the method is macroporous strongly acidic cation exchange resin loading a hydrogenation active component. The method provided by the invention can effectively simplify the existing processfor preparing isooctane from isobutene, has the advantages of simple process, long service life of the catalyst, high isobutene conversion rate and high isooctane selectivity, and can significantly reduce the production cost of the process for preparing isooctane from isobutene.

Description

technical field [0001] The invention belongs to the technical field of preparation of isooctane, and in particular relates to a method for preparing isooctane by superposition-hydrogenation of isobutene. Background technique [0002] Under the global trend of banning methyl tert-butyl ether (MTBE) as a high-octane gasoline additive, many MTBE production devices are facing the problem of transformation. Since the raw material is isobutylene and the process is similar, the most common and low The cost-effective method is to transform the MTBE unit into an indirect alkylation process, and isobutene is produced through two processes of dimerization and hydrogenation to produce isooctane. The dimerization reaction of isobutene belongs to the oligomerization reaction of low carbon olefins, also known as superimposition reaction. Mature indirect alkylation technologies mainly include InAlk process of UOP, CDIsoether process jointly developed by Snamprogetti and CDTECH, NExOCTANE p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/74C07C9/15
CPCC07C2/74C07C2531/10C07C9/15
Inventor 熊凯李正艳纪玉国杜周张富春任玉梅
Owner CHINA PETROLEUM & CHEM CORP
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