Catalyst for producing epoxypropane by liquid phase one-step oxidation of propylene and preparation method

A technology of propylene oxide and catalyst, which is applied in the field of catalyst and preparation for the one-step oxidation of propylene to propylene oxide, and can solve the problems of easy loss of catalyst and degradation of catalyst reusability

Inactive Publication Date: 2011-03-30
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Our research group adopts MoO 3 / SiO 2 As a catalyst (Journal of Molecular Catalysis A: Chemical, doi: 10.1016 / j.molcata.2009.02.017, Chinese invention patent ZL 02145329.2), reacted at 80°C and 2.2MPa for 4 hours, and achieved 99% conversion of CHP rate and 85.3% propylene oxide selectivity, but the problem is that under the reaction conditions, MoO 3 / SiO 2 Catalyst is easy to lose, which reduces the reusable performance of the catalyst

Method used

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  • Catalyst for producing epoxypropane by liquid phase one-step oxidation of propylene and preparation method
  • Catalyst for producing epoxypropane by liquid phase one-step oxidation of propylene and preparation method
  • Catalyst for producing epoxypropane by liquid phase one-step oxidation of propylene and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 20ml of tetraethyl orthosilicate (TEOS) and 20ml of absolute ethanol into the three-necked flask, then add 40ml of ammonia solution with pH=9.1, stir at 80°C for 60 minutes, then add 3ml of formamide dropwise under stirring, and then Add dropwise 40ml containing 1.2g ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) and 0.005g ammonium chloride (NH 4 Cl) mixed aqueous solution, vigorously stirred for 10 minutes; then stood and aged at 80°C for 3h; the obtained gel was aged at room temperature for one week, dried at 100°C, ground, and roasted in air at 550°C for 5h to obtain 1# catalyst, catalyst The performance evaluation results are shown in Table 1.

Embodiment 2

[0022] NH in Example 1 4 The amount of Cl was changed to 0.02g, and other processes were the same as in Example 1 to obtain 2# catalyst, and the catalyst performance evaluation results are shown in Table 1.

Embodiment 3

[0024] NH in Example 1 4 The amount of Cl was changed to 0.04g, and other processes were the same as in Example 1 to obtain the 3# catalyst. The catalyst performance evaluation results are shown in Table 1.

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Abstract

The invention discloses a catalyst used for preparing propylene oxide by liquid phase oxidation of propylene in one step through taking isopropyl benzene hydroperoxide as an oxidant, and a preparation method thereof. The catalyst is a supported molybdenum oxide catalyst containing chlorine, and is formed by a catalytic active composition MoO3, an accelerative catalyst Cl<-> and a carrier SiO2 to be prepared by the sol-gel method. The catalyst reacts for 4 hours at 80 DEG C and 2.2MPa, and yield and selectivity of the propylene oxide can reach 90 percent and 100 percent respectively.

Description

technical field [0001] The invention relates to a catalyst and a preparation method for producing propylene oxide by one-step liquid phase oxidation of propylene oxide with cumene hydroperoxide as an oxidant. The catalyst is a chlorine-containing supported molybdenum oxide catalyst, and relates to a The preparation method is a simple method for preparing the chlorine-containing supported molybdenum oxide catalyst. Background technique [0002] Propylene oxide (PO) is an important basic organic chemical raw material, mainly used in the production of polyether polyol and propylene glycol for polyurethane. The chlorohydrin method and the Halcon method are the main methods for industrial production of propylene oxide at present, but the former produces a large amount of chlorine-containing wastewater in the production process, which not only seriously corrodes the equipment but also pollutes the environment, while the latter will produce a large number of co-products, and the ec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/132C07D303/04C07D301/19
CPCY02P20/52
Inventor 卢冠忠苗永霞刘晓晖郭杨龙王艳芹郭耘张志刚王筠松
Owner EAST CHINA UNIV OF SCI & TECH
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