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Solid acid alkylation method and reaction device

A technology of alkylation reaction and alkylation reactor, which is applied in the field of alkylation reaction devices, can solve problems such as easy deactivation, poor selectivity, and lower octane number, and achieve the effect of improving quality and increasing activity

Active Publication Date: 2020-01-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The biggest problem in the use of solid acid catalysts in alkylation reactions is that they are extremely easy to deactivate, such as molecular sieve catalysts, SO 4 2- / Oxide catalyst in a few hours, even minutes, the alkylation reaction activity of the catalyst (C 4 ＝ Olefin conversion rate) drops from 100% to a very low level, and the selectivity of the reaction becomes poor, causing the octane number of the alkylation reaction product-alkylated oil to decrease

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  • Solid acid alkylation method and reaction device

Examples

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Effect test

Embodiment 1

[0034] This example illustrates the alkylation of isobutane with butene according to the process of the present invention.

[0035] according to figure 1 The scheme shown carries out the alkylation reaction.

[0036] Weigh 10 grams of Y molecular sieve catalyst (Sinopec Catalyst Branch Changling Catalyst Factory), put it into a 20ml fixed-bed reactor, and feed it with nitrogen flow. Raise the temperature and pressure to the temperature and pressure required for the reaction, pump in the mixed reaction raw material containing isobutane and butene according to the required alkene ratio (the molar ratio of isoparaffin to olefin) in the reaction material and close the nitrogen flow at the same time . The reaction product enters the buffer after passing through the hydrogenation tower (the hydrogenation condition is that the hydrogen feed mass flow rate is 0.5% of the reactor outlet stream mass, the number of plates is 100, the reflux ratio is 20, the hydrogenation pressure is 2M...

Embodiment 2

[0053] The same as the circulation ratio of Example 1 of 0.9, the difference is that the reaction conditions are changed to: temperature 30°C, pressure 5MPa, alkane / ene=25 (molar ratio), olefin weight space velocity for 1 hour -1 . The reaction results are listed in Table 3.

Embodiment 3

[0055] The same as the circulation ratio of Example 1 of 0.9, the difference is that the reaction conditions are changed to: temperature 150°C, pressure 2MPa, alkane / ene=10 (molar ratio), olefin weight space velocity 0.1 hour -1 . The reaction results are listed in Table 3.

[0056] table 3

[0057] Example 2 24h 48h 72h 96h C 4 Olefin Conversion / %

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Abstract

The invention provides a solid acid alkylation method, which comprises: carrying out a contact reaction on reaction raw materials including an alkylatable organic compound and an alkylating agent under alkylation reaction conditions in the presence of a solid acid catalyst to form alkylated oil, wherein the outlet stream of an alkylation reactor contacts hydrogen, separating is performed, and onepart of the separated hydrogen-free material is circulated back to the alkylation reactor. According to the method of the invention, the activity of the catalyst is improved, and the quality of the alkylated oil is improved.

Description

technical field [0001] The present invention relates to an alkylation reaction device and a reaction method, more specifically the present invention relates to an alkylation reaction device and a reaction method in the presence of a solid acid catalyst. Background technique [0002] The alkylation reaction of isobutane and butene is an important process in the petroleum refining industry to produce high-octane gasoline components. As an ideal high-octane gasoline blending component, this alkylated oil has octane High value, low sensitivity, low Reid method vapor pressure, no olefins, aromatics, and low sulfur content. [0003] At present, the industrially used alkylation oil production processes mainly include the sulfuric acid method and the hydrofluoric acid method. The safety and environmental protection pressure of alkylate production enterprises is increasing day by day. For this reason, since the 1980s, many large oil companies and scientific research institutions in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/58C07C9/16
CPCC07C2/58C07C2529/08C07C9/16
Inventor 张成喜李永祥胡合新付强慕旭宏
Owner CHINA PETROLEUM & CHEM CORP