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Method of producing high octane value gasoline blending component using mixed C4

A high-octane gasoline and component blending technology, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of high trimer content and no expansion of follow-up processes, etc., to meet the requirements of clean fuel gasoline effect

Inactive Publication Date: 2003-04-16
CHINA PETROLEUM & CHEM CORP
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Problems solved by technology

CN1087616A discloses a multi-level fixed-bed series polymerization process of mixed carbon four. The raw materials pass through two or more series reactors successively, and the polymerization reaction is controlled by the reaction temperature. Since no polymerization inhibitor is added, the reaction product is also made Trimer content is high
This patent does not use water or alcohols to improve the selectivity of the polymerization reaction. Instead, it is believed that a small amount of water contained in the raw material will be detrimental to the selective dimerization of isobutylene, which is contrary to the industrialized examples introduced in other documents.
The above patented technologies are only mixed C 4 The polymerization process of medium olefins, without expanding the subsequent process of hydrogenation of polymerization products to produce indirect alkylate

Method used

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  • Method of producing high octane value gasoline blending component using mixed C4
  • Method of producing high octane value gasoline blending component using mixed C4

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] use as figure 1 The catalytic distillation indirect alkylation process.

[0035] mix C 4 Contains 48.5% isobutene and 26.3% n-butene

[0036] Feed amount: 300g / h

[0037] Fixed bed polymerization reactor catalyst loading: 500ml

[0038] Catalytic distillation tower catalyst loading: 200ml

[0039] Hydrogenation reactor with 300gl palladium catalyst

[0040] A polymerization inhibitor (tert-butanol) is added to the raw material, and the molar ratio of the inhibitor to isobutene in the fresh feed is 0.015:1.

[0041] All polymerization products are sent to the hydrogenation unit

[0042] Fixed bed polymerization reaction temperature 50.0°C, reaction pressure 0.65Mpa

[0043] The inlet temperature of the catalytic distillation tower bed layer is 62°C, and the reaction pressure is 0.65Mpa

[0044] Hydrogenation bed temperature: 160°C, hydrogenation pressure 1.0Mpa

[0045] Obtain polymerization product 185g / h, wherein C8 content is 93.7%

[0046] The hydrogenation...

Embodiment 2

[0048] use as figure 2 Indirect Alkylation Process with Fixed Bed in Series

[0049] mix C 4 Contains 48.5% isobutene and 26.3% n-butene

[0050] Feed amount: 300g / h

[0051] The catalyst loading capacity of the first and second fixed bed polymerization reactors are respectively: 500ml and 300ml

[0052] Add appropriate amount of polymerization inhibitor (water) respectively in the feed of the two-stage reactor, the mol ratio of total inhibitor amount and the isobutylene in the fresh feed is 0.02: 1, the add-on amount of the first stage reaction is 70% of total amount .

[0053] Hydrogenation reactor is equipped with 300g palladium catalyst

[0054] The first-stage fixed-bed polymerization reaction temperature is 50.0°C, and the reaction pressure is 1.0Mpa

[0055] The second-stage fixed-bed polymerization reaction temperature is 70.0°C, and the reaction pressure is 1.0Mpa

[0056] Hydrogenation bed temperature: 160°C, hydrogenation pressure 1.0Mpa

[0057] Obtain pol...

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Abstract

A process for preparing the additive for high-octane gasoline from C4 mixture includes such steps as polymerizing reaction in a combination of fixed bed reactor and catalysis distilling column under the existance of catalyst and depressant, and hydrogenating the resultant to obtain the alkylated product. Its advantages are high transform rate of isobutylene (90%), high total content of C8 (more than 92%) and high octane number (higher than 95).

Description

technical field [0001] The invention relates to a method for producing high-octane gasoline blending components. Background technique [0002] In order to meet the requirements of the new standard gasoline, the blending components of the new standard gasoline produced by the blending method mainly include: MTBE, TAME, ethanol, alkylation products and indirect alkylation products, among which MTBE is the main blending component, but MTBE Very soluble in water, it is a potential pollutant to ground water. Moreover, the vapor pressure of MTBE is relatively high, which contradicts the development trend of low volatility of gasoline; TAME and MTBE have the same problem; the production of ethanol gasoline needs to consume a large amount of grain, so its production scale and production area are limited; alkylation The process has strict requirements on equipment, high acid consumption, large amount of waste acid, difficult treatment, and poor economic ...

Claims

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Application Information

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IPC IPC(8): C10G69/00
Inventor 贾颖华于在群郝兴仁王光辉
Owner CHINA PETROLEUM & CHEM CORP
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