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Method for preparing dual-function catalyst and application thereof

A dual-function catalyst and additive technology, applied in the chemical industry, can solve the problems of low utilization rate, low conversion rate of toluene, severe methanol decomposition, etc., achieve the effect of simple operation, simple preparation method, and meet the requirements of industrial application

Active Publication Date: 2017-01-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Low conversion rate of toluene, severe methanol decomposition and low utilization rate are the main factors limiting the industrialization of this process route

Method used

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  • Method for preparing dual-function catalyst and application thereof
  • Method for preparing dual-function catalyst and application thereof
  • Method for preparing dual-function catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The preparation of embodiment 1 basic molecular sieve sample

[0055] Basic molecular sieve sample Z-1 # preparation of

[0056] Take 20 g each of NaX (Si / Al=1.17), NaY (Si / Al=2.51), and Naβ (Si / Al=3.93), and exchange them with 125 ml of 0.5 mol / L CsCl solution at 80°C for 4 times. Washing with deionized water and suction filtration until the filtrate was added with silver nitrate solution without precipitation, dried overnight at 120°C, roasted in the air at 500°C for 5 hours, after grinding, pressed into tablets, crushed and sieved into 20-40 mesh for later use, the obtained The sample is marked as Z-1 # ~Z-3 # .

[0057] Equal volume impregnated basic molecular sieve sample Z-4 # ～Z-8 # preparation of

[0058] First vacuumize the carrier to be impregnated, and then use deionized water to measure the saturated adsorption capacity of the carrier to deionized water. Calculate the mass of the impregnated precursor according to the load, dissolve the corr...

Embodiment 2

[0062] The preparation of embodiment 2 metal oxide samples

[0063] metal oxide OX-1 # Preparation of:

[0064] Take 7.9g Cu(NO 3 )·3H 2 O, 7.1g Zn(NO 3 ) 2 ·6H 2 O, 5.6g Al(NO 3 ) 3 9H 2 O, 1.3g Cr(NO 3 ) 3 9H 2 O was dissolved in 125ml deionized water, and under high-speed stirring at 70°C, 1mol / L Na 2 CO 3 The pH of the solution was adjusted to 7, aged at 80°C for 5 hours, filtered, dried overnight at 120°C, roasted at 520°C for 2 hours, ground, pressed into tablets, crushed and sieved into 20-40 mesh for later use. The obtained sample was designated as OX-1 # .

[0065] OX-2 # ~OX-3 # Preparation of:

[0066] The specific experimental steps are the same as OX-1 # The preparation of the metal salt, the relationship between the type and amount of the metal salt and the sample number are shown in Table 2.

[0067] Table 2

[0068]

Embodiment 3

[0069] The element composition analysis of embodiment 3 basic molecular sieve sample and metal oxide sample

[0070] Sample Z-1 by XRF # ~Z-8 # and sample OX-1 # ~OX~3 # The element composition of is analyzed, and the result is as shown in table 3 and table 4:

[0071] table 3

[0072]

[0073] Table 4

[0074] sample Molar ratio of metal elements OX-1 # Cu: Zn: Al: Cr: = 10.4: 7.9: 4.4: 1 OX-2 # Cu: Zn: Al: Cr: = 9.7: 5.5: 4.1: 1 OX-3 # Cu: Zn: Al: Cr: = 14.8: 3.8: 2.7: 1

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Abstract

The invention relates to a dual-function catalyst, a method for preparing the same and application of the dual-function catalyst. The dual-function catalyst comprises metal oxide and alkaline molecular sieves. A mass ratio of the alkaline molecular sieves to the metal oxide is 0.1-10:1. The dual-function catalyst, the method and the application have the advantages that the dual-function catalyst can be used in reaction for preparing styrene from toluene and methanol and jointly producing ethylbenzene and is good in stability, the conversion rate of the toluene which is a raw material can be greatly increased, and the yields of the styrene and the ethylbenzene which are products can be increased.

Description

technical field [0001] The invention relates to a preparation method of a bifunctional catalyst and its application in the preparation of styrene and ethylbenzene, belonging to the field of chemical industry. Background technique [0002] Molecular sieves are crystalline aluminosilicates whose framework consists of [AlO 4 - ] tetrahedron and [SiO 4 ] Tetrahedral composition, due to the presence of aluminum, the molecular sieve framework is negatively charged, requiring additional cations to exist as charge-balancing ions. When the counter ion is an alkali metal ion, the negatively charged oxygen atoms in the molecular sieve framework exhibit basicity, and the basicity of the molecular sieve increases with the atomic number of the alkali metal ion. Different types of alkali metal molecular sieves can be prepared by ion exchange, for example, CsX can be prepared by ion exchange of NaX with CsOH solution. [0003] Alkali metal ion-exchanged molecular sieves can be used for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/16B01J29/78C07C2/86C07C15/073C07C15/46
CPCB01J29/08B01J29/60C07C2/86C07C15/073C07C15/46Y02P20/52B01J29/163B01J29/166B01J29/7815B01J2229/18C07C2/862C07C2/864C07C2529/16C07C2529/78
Inventor 许磊李沛东徐力张晓敏袁扬扬
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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