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Method for preparing isooctane by isobutene superposition-hydrogenation

A technology for isobutene and isooctane, 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 shortening residence time, long service life of catalyst and simplifying 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
  • Method for preparing isooctane by isobutene superposition-hydrogenation
  • Method for preparing isooctane by isobutene superposition-hydrogenation

Examples

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Embodiment 1

[0050] Fill 50mL γ-Al into the fixed bed reactor 2 o 3 The catalyst of loading Pd and styrene-divinylbenzene macroporous sulfonic acid resin, the dry base acid content of this catalyst is 3.1mol H + / kg, the dry basis Pd content is 0.5wt%. The specific surface area of ​​the catalyst is 40m 2 / g, the pore volume is 0.25mL / g, and the average pore diameter is 31nm. 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 10wt% of isopropyl ether 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 0.8MPa, and a hydrogen / isobutylene molar ratio 2.0 and the volumetric space velocity of fresh raw material is 3.0h -1 Under...

Embodiment 2

[0052] 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

[0054]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 by isobutene superposition-hydrogenation. The method comprises the following steps: making hydrogen and a raw material containing isobutene contact a superposition-hydrogenation bifunctional solid acid catalyst in a reactor to carry out a superposition-hydrogenation reaction, wherein the superposition-hydrogenation bifunctional solid acid catalyst comprises an inert or acidic carrier, a hydrogenation active component and an acidic component. The method provided by the invention can effectively simplify the existing process for preparingisooctane 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): C07C2/74C07C9/16B01J31/10B01J23/44
CPCC07C2/74B01J31/10B01J23/44C07C9/16
Inventor 熊凯李正艳杜周张富春任玉梅
Owner CHINA PETROLEUM & CHEM CORP
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