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Process for preparing isooctene by selective superposition of mixed C4

A hybrid carbon four, selective technology, applied in the direction of hydrocarbons, hydrocarbons, carbon compound catalysts, etc., can solve the problem of low 1-butene catalysts

Pending Publication Date: 2021-11-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on the above literature survey, in the prior art, there is no superposition process with low 1-butene conversion, mild reaction conditions, simple reaction process and recyclable catalyst under the premise of ensuring high conversion rate of isobutene.

Method used

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  • Process for preparing isooctene by selective superposition of mixed C4
  • Process for preparing isooctene by selective superposition of mixed C4
  • Process for preparing isooctene by selective superposition of mixed C4

Examples

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Effect test

preparation example Construction

[0042] According to the present invention, the preparation method of described Y type molecular sieve catalyst comprises:

[0043] (1) NaY molecular sieve and ammonium salt aqueous solution are subjected to ammonium ion exchange reaction to obtain NH 4 -Y type molecular sieve;

[0044] (2) NH 4 -Y-type molecular sieve is subjected to hydrothermal treatment to obtain ultra-stable Y-type molecular sieve;

[0045] (3) contacting the ultra-stable Y-type molecular sieve with oxoacid and ammonium oxoacid for acid treatment, then drying and roasting to obtain a modified HY-type molecular sieve;

[0046] (4) Mix the modified HY type molecular sieve and the alumina source to form a carrier mixture, and add nitric acid aqueous solution and scallop powder to the carrier mixture to make a slurry for extruding.

[0047] According to the present invention, desodium NH is obtained through the step (1) 4 - Molecular sieve of type Y, preferably such that said desodiumized NH 4 -Na of Y mo...

Embodiment 1

[0084] This example is used to illustrate the process for preparing isooctene by selective condensation of mixed carbon four provided by the present invention.

[0085] Weigh 120g NaY powder (SiO 2 / Al 2 o 3 The molar ratio is 5:1, Na 2 O content is 8% by weight), 60g NH 4 Mix Cl with 800g of water at room temperature, stir at 75°C for 3 hours and then filter; after suction filtration three times, add the filter residue to 800g of water, stir at 75°C for 3 hours and then filter, and repeat this operation twice. Put the obtained filter residue into a high-temperature hydrothermal treatment furnace for hydrothermal treatment. The temperature of the furnace is raised from room temperature to 550 °C at a rate of 10 °C / min, and the temperature is kept for 3 hours. The water vapor pressure in the furnace is controlled to 0.1 MPa. Add 12g oxalic acid and 18g ammonium oxalate to the molecular sieve after hydrothermal treatment and add 1.4L water to be configured into a 0.2mol / L ox...

Embodiment 2

[0093] This example is used to illustrate the process for preparing isooctene by selective condensation of mixed carbon four provided by the present invention.

[0094]Repeat the reaction in Example 1-deactivated catalyst washing and regeneration-reaction step 5 times, after the fifth washing and regeneration, the conversion rate of isobutene is 96.7%, the conversion rate of 1-butene is 5.4%, and the total conversion rate of butene is 45.3% %, the total conversion rate of linear butenes (1-butene, cis-2-butene, trans-2-butene) is 4.9%, and the selectivity of carbon octaolefins is 66.3%.

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Abstract

The invention relates to the field of petrochemical engineering, and discloses a process for preparing isooctene by selective superposition of mixed C4. The process comprises the following steps: carrying out selective superposition reaction on the mixed C4 in the presence of a catalyst at the reaction temperature of not higher than 60 DEG C, and washing and regenerating the deactivated catalyst by using a detergent. According to the process disclosed by the invention, the deactivated catalyst which is subjected to the selective superposition reaction under the low-temperature reaction condition is directly subjected to solvent washing regeneration, the reaction cycle can be maintained, and meanwhile, the reaction can realize higher isobutene conversion rate and isobutene superposition selectivity under the milder reaction condition.

Description

technical field [0001] The invention belongs to the field of petrochemical industry. Specifically, the invention relates to a process for preparing isooctene by selective superimposition of mixed carbon four. Background technique [0002] Methyl tert-butyl ether (MTBE) is a high-octane gasoline component, its basic octane RON: 115, MON: 100, is an excellent gasoline high-octane additive and antiknock agent. At present, ethanol gasoline for vehicles is required not to artificially add oxygen-containing organic compounds, that is, etherified components such as MTBE will no longer be used as gasoline blending components. This forces oil refiners to seek solutions for the reuse of C4 raw materials and equipment after the use of MTBE is hindered. At present, the main alternative to the MTBE unit is the superposition-hydrogenation reaction of isobutene to produce isooctane with a higher octane number. Among them, the superposition of isobutene is a key step, that is, isobutene se...

Claims

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Application Information

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IPC IPC(8): C07C11/02C07C2/12B01J29/08B01J35/10B01J38/56B01J29/90
CPCC07C2/12B01J29/08B01J38/56B01J29/90B01J2229/24B01J2229/37B01J2229/40C07C2529/08B01J35/617B01J35/635B01J35/633C07C11/02Y02P20/584Y02P20/54
Inventor 李佳琪温朗友李明罡夏玥穜郜亮俞芳喻惠利董明会张伟
Owner CHINA PETROLEUM & CHEM CORP
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