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Biomass oxidative cracking catalyst based on modified H-Beta molecular sieve and preparation method and application thereof

A technology of oxidative cracking and catalysts, which is applied in molecular sieve catalysts, physical/chemical process catalysts, oxidation reaction preparation, etc., and can solve the problems of low product selectivity and non-reusability

Active Publication Date: 2021-07-06
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these homogeneous catalysts are not reusable and have low product selectivity

Method used

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  • Biomass oxidative cracking catalyst based on modified H-Beta molecular sieve and preparation method and application thereof
  • Biomass oxidative cracking catalyst based on modified H-Beta molecular sieve and preparation method and application thereof
  • Biomass oxidative cracking catalyst based on modified H-Beta molecular sieve and preparation method and application thereof

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preparation example Construction

[0038] A kind of preparation method of the biomass oxidative cracking catalyst based on modified H-Beta molecular sieve of the present invention comprises the following steps:

[0039] Dissolve the soluble active component precursor in deionized water to obtain the active component solution, then disperse the dealuminated H-Beta carrier in the active component solution for stirring and impregnation, and obtain a heterogeneous phase after rotary evaporation, drying and roasting supported catalyst.

[0040] Among them, the soluble active component precursor is copper nitrate, copper sulfate, copper chloride, zinc nitrate, zinc sulfate, zinc chloride, ferric nitrate, ferrous nitrate, ferric sulfate, ferrous sulfate, ferric chloride, ferrous chloride One or more of iron, silver nitrate, cobalt chloride, cobalt sulfate, cobalt nitrate and tetrachloroauric acid.

[0041] The further improvement of the present invention is that the mass ratio of the active component precursor to the...

Embodiment 1

[0054] The active component precursor was dissolved in 30mL deionized water to obtain the active component solution, and then 4g of dealuminated H-Beta carrier was dispersed in the active component solution, and immersed for 12h under magnetic stirring at 400r / min, and then The obtained suspension was evaporated to dryness on a rotary evaporator at a temperature of 60°C and a pressure of -0.09MPa at a speed of 40r / min, and then the obtained solid was dried in an oven at 110°C for 12h. After drying, it was placed in a muffle furnace from room temperature to 450°C at a rate of 2°C / min, and calcined for 6 hours to obtain a supported catalyst, denoted as A. Among them, the active component precursor is Cu(NO 3 ) 2 ·3H 2 O, the mass ratio of the active component precursor and the dealuminated H-Beta carrier is 5:100;

Embodiment 2

[0056] The difference from Example 1 is that the mass ratio of the active component precursor to the dealuminated H-Beta carrier is 10:100; the catalyst prepared in this example is designated as B.

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Abstract

The invention discloses a biomass organic molecule oxidative cracking catalyst based on a modified H-Beta molecular sieve as well as a preparation method and application thereof. A metal component with better catalytic activity on ortho-diol is selected to be subjected to ion exchange with dealuminated H-Beta zeolite, so that the active component enters a framework of a dealuminated molecular sieve to serve as Lewis acid and an adsorption site in a reaction process, furthermore, the cracking activity and the reaction selectivity of the catalyst are effectively improved by utilizing the valence change of the metal ions and the synergistic effect of the metal ions and the H-Beta carrier, and the efficient and reusable catalyst meeting the ortho-diol C-C bond breakage is constructed. The prepared catalyst is used for the oxidative cracking reaction of phenyl glycol, the conversion rate of phenyl glycol is high, the yield of the oxidative cracking product reaches 95% or above, and the catalyst has unique advantages in the oxidative cracking reaction of biomass organic molecules.

Description

technical field [0001] The invention relates to the field of chemical transformation and utilization of biomass, in particular to a biomass oxidative cracking catalyst based on modified H-Beta molecular sieves, a preparation method and application thereof. Background technique [0002] Biomass is the most widespread substance on the earth. Its main components - lignin and cellulose are regenerated at a rate of about 164 billion tons per year, which is equivalent to 15-20 times the oil production in terms of energy conversion. At the same time, because biomass is carbon neutral, compared with fossil resources, biomass is a clean and renewable resource with a wider range of sources. [0003] Most of the constituent monomers of biomass have structures containing hydroxyl groups on two or more adjacent carbon atoms, which are similar to structural units such as 1,2-diol. Therefore, many transformations of biomass can be analyzed and discussed from the changes of 1,2-diol struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/76B01J29/70B01J35/02B01J35/08C07C29/50C07C41/50C07C45/51C07C67/40C07C47/54C07C33/22C07C69/78C07C43/307
CPCB01J29/7615B01J29/7057C07C41/50C07C67/40C07C29/50C07C45/512B01J35/51B01J35/40C07C47/54C07C33/22C07C69/78C07C43/307Y02P20/584
Inventor 吴志强王鹏森杨伯伦
Owner XI AN JIAOTONG UNIV
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