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A kind of alcohol solvent hydrofining catalyst for olefin epoxidation reaction process and its preparation method and application

A technology for epoxidation reaction and hydrorefining, which is used in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, preparation of organic compounds, etc., and can solve the problem of limited removal of harmful impurities and insufficient activity. , complex composition and other problems, to achieve the effect of good hydrogenation activity, improved reduction degree, and high impurity removal rate

Active Publication Date: 2022-04-12
HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Even so, the activity of the circulating alcohol solvent hydrofining catalyst in the olefin epoxidation reaction process is still insufficient, and the removal of harmful impurities is still very limited.
In addition, due to the complex composition of the reaction system, many impurities, the system contains water and acidity, hydrogen peroxide and trace polymers, etc., these factors lead to further improvement of the service life of the hydrogenation catalyst

Method used

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  • A kind of alcohol solvent hydrofining catalyst for olefin epoxidation reaction process and its preparation method and application
  • A kind of alcohol solvent hydrofining catalyst for olefin epoxidation reaction process and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of catalysts:

[0030] (1) 10.0 grams of Ni (NO 3 ) 2 · 6h 2 O Soluble in deionized water to form impregnation fluid;

[0031](2) Put the impregnation liquid with the above-to-impregnated Al 2 O 3 Vectors (γ-al 2 O 3 The content is 40% by weight, δ-al 2 O 3 The content is 60 wt%) contact to impregnate Ni onto the carrier, then dried at 200 ° C for 10 h to obtain catalyst A.

[0032] Catalyst reduction and alcohol solvent hydrotreating:

[0033] Take 5.0 grams of catalyst C to fix the diameter of 12 mm, a fixed bed stainless steel reactor having a length of 90 cm, and the upper and lower ends of the reactor are filled with stone sand, intermediate filling catalyst to ensure the constant temperature zone of the catalyst in the reactor (if not specified, Both of the following examples use the reactor, the filling method is also consistent), in which the catalyst reduction is first performed, then the alcohol solvent hydrotreating of the olefin ring oxidation proces...

Embodiment 2

[0038] Preparation of catalysts:

[0039] (1) 10.0 grams of Ni (NO 3 ) 2 · 6h 2 O, 0.2 grams (NO) 3 ) 2 And 8.4 grams C 6 Hide 8 O 7 · H 2 O Soluble in deionized water to form impregnation fluid;

[0040] (2) Put the impregnation liquid with the above-to-impregnated Al 2 O 3 Vectors (γ-al 2 O 3 The content is 40% by weight, δ-al 2 O 3 The content was 60 wt%) to contact the Ni to the carrier, then dried at 200 ° C for 10 h, resulting in catalyst B, catalyst weight percent (wt%) as: 20 ni0.6Mn1.1c / al 2 O 3 .

[0041] Catalyst reduction and alcohol solvent hydrotreating: Tongji 1

[0042] The composition of the raw material hydrogenation reaction is shown in Table 1.

Embodiment 3

[0044] Preparation of catalysts:

[0045] (1) 10.0 grams of Ni (NO 3 ) 2 · 6h 2 O, 1.0 grams MN (NO 3 ) 2 And 8.4 grams C 6 Hide 8 O 7 · H 2 O Soluble in deionized water to form impregnation fluid;

[0046] (2) Put the impregnation liquid with the above-to-impregnated Al 2 O 3 Vectors (γ-al 2 O 3 The content is 40% by weight, δ-al 2 O 3 The content was 60 wt%) to contact Ni, Mn, and citric acid onto the carrier, then dried at 200 ° C for 10 h, resulting in catalyst C, catalyst weight percent (wt%) as: 20 ni3Mn1.1c / al 2 O 3 .

[0047] Catalyst reduction and alcohol solvent hydrotreating: Tongji 1

[0048] The composition of the raw material hydrogenation reaction is shown in Table 1.

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Abstract

The invention provides an alcohol solvent hydrofining catalyst in the olefin epoxidation reaction process and a preparation method thereof, wherein the active component element of the catalyst is Ni, the additive component element is Mn or Fe, and in addition contains C, a carrier for alumina. The catalyst of the invention has good hydrogenation activity and high impurity removal rate when used in alcohol solvent hydrogenation refining in the olefin epoxidation reaction process, the catalyst has been used continuously for 4000 hours without obvious deactivation, and is especially suitable for industrial application.

Description

Technical field [0001] The present invention belongs to the field of hydrotreating techniques, and in particular, the alcohol solvent involving an olefin epoxidation reaction process is hydrotreating catalyst and its preparation method thereof. Background technique [0002] The hydrogen peroxide is oxidizing agent, catalyzed propylene oxidation in titanium silicon molecular sieves to produce propylene oxide, is a green new process that is very developing. In this process, the reaction is preferably carried out in the presence of a water miscible solvent to improve the solubility of propylene in the reaction mixture, and the boiling point of the solvent used is between the boiling point of the propylene oxide and the water, preferably methanol as a solvent, so that it can be capable of distillation The step is separated from the reaction mixture and the reaction is recycled back to the reaction. [0003] The olefin epoxidation process not only produces an impurity such as a carbon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J23/889C07C29/90C07C31/04
CPCB01J23/755B01J23/002B01J23/8892C07C29/90B01J2523/00B01J2523/31B01J2523/72B01J2523/847B01J2523/842C07C31/04Y02P20/52
Inventor 王慧匡洪生向明林易娇王伟李庆华佘喜春
Owner HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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