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Catalyst for preparing 1,3-butadiene and preparation method thereof

A catalyst, butadiene technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as adverse effects of catalyst performance, extremely high requirements on corrosion resistance, and unfavorable industrial safety production. Conducive to industrialized large-scale production, low equipment requirements, and low production costs

Active Publication Date: 2021-08-24
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of sulfuric acid to dealuminate silica-alumina molecular sieves will introduce sulfate ions that are difficult to remove; the use of hydrochloric acid requires extremely high corrosion resistance of equipment, and chloride ions will also have a serious adverse effect on catalyst performance; nitric acid is a better However, it is necessary to use concentrated nitric acid at 60°C-120°C to effectively remove the aluminum in the molecular sieve skeleton, and the amount of acid required is high, which is not only costly, but also not conducive to industrial safety production

Method used

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  • Catalyst for preparing 1,3-butadiene and preparation method thereof
  • Catalyst for preparing 1,3-butadiene and preparation method thereof
  • Catalyst for preparing 1,3-butadiene and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. The composition of the catalyst for preparing 1,3-butadiene: the quality of the all-silicon beta molecular sieve is recorded as 1, the quality of the oxide of copper is 0.3%, the quality of the oxide of zinc is 0.3%, the oxide of yttrium The mass of the catalyst is 1.2%, and the catalyst is recorded as: 0.3wt% Cu-0.3wt% Zn-1.3wt% Y / Si-beta. figure 1 It is the XRD pattern of the catalyst, as can be seen from the figure, the catalyst prepared in Example 1 is a pure phase without other impurities.

[0043] 2. Catalyst preparation process:

[0044] 2.3g Cu(NO 3 ) 2 ·3H 2 O was dissolved in 200 mL deionized water to obtain a concentration of 3.75×10 -2 moL / L copper nitrate solution, the same Zn(Ac) 2 2H2 O was dissolved in deionized water to a concentration of 3.75×10 -2 moL / L zinc acetate solution, Y(NO 3 ) 3 ·6H 2 O was dissolved in deionized water to obtain a concentration of 3.75×10 -2 moL / L of yttrium nitrate solution. Then take 1mL of copper nitrate solut...

Embodiment 2

[0048] The catalyst used in this embodiment is the same as in Example 1, that is, 0.3wt% Cu-0.3wt% Zn-1.3wt% Y / Si-beta, the amount of catalyst used is 0.5g, and the reaction mass space velocity is 1.0h -1 , all the other reaction conditions are identical with embodiment 1. The specific experimental results are shown in Table 1.

Embodiment 3

[0050] The difference from Example 2 is that the catalyst used in this example consists of: the quality of the all-silicon beta molecular sieve is recorded as 1, the quality of the oxide of copper is 0.3%, the quality of the oxide of zinc is 0.6%, the oxidation of yttrium The quality of material is 2.5%, and this catalyzer is recorded as: 0.3wt%Cu-0.6wt%Zn-2.5wt%Y / Si-beta, catalyst consumption is 0.5g, and reaction mass space velocity is 1.0h -1 , all the other reaction conditions are identical with embodiment 2. figure 2 is the SEM image of the catalyst, image 3 TEM image of the catalyst. The performance test results of the catalyst are shown in Table 1.

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Abstract

The invention belongs to the technical field of molecular sieve catalysts, and discloses a catalyst for preparing 1,3-butadiene and a preparation method thereof. The catalyst comprises an all-silicon molecular sieve containing a BEA structure or an MFI structure and oxides of copper, zinc and yttrium loaded on the all-silicon molecular sieve. The all-silicon molecular sieve containing the BEA structure or the MFI structure is adopted as the carrier to load the copper oxide, the zinc oxide and the yttrium oxide to form the three-component metal oxide composite molecular sieve catalyst; the catalyst is high in activity at a high-quality airspeed and high in selectivity for 1,3-butadiene. The catalyst provided by the invention has long-term catalytic activity and continuous renewability, and can be repeatedly roasted and regenerated. The preparation process of the catalyst is simple, the carrier material does not need to be subjected to acid treatment, the requirement on equipment is low, and the industrial production safety is high; in addition, the raw materials are easy to obtain, the production cost is low, and industrial large-scale production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of molecular sieve catalysts, and in particular relates to a catalyst for preparing 1,3-butadiene and a preparation method thereof. Background technique [0002] Butadiene is an important chemical raw material widely used in the manufacture of automobile tires. At present, most of the butadiene is obtained by extracting the by-product C4 fraction of naphtha steam cracking to produce ethylene. But this process route is very dependent on fossil energy, combined with the state of my country's natural resources, the development of ethanol to butadiene process route is currently the most promising non-petroleum way to prepare butadiene. Ethanol made from coal, natural gas and biomass can generate butadiene under the catalysis of molecular sieves, which can greatly alleviate the energy situation of lack of petroleum resources. [0003] The main problem currently faced by the one-step synthesis of butadiene from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03C07C1/20C07C11/167
CPCB01J29/03C07C1/20B01J2229/18C07C11/167Y02P20/584
Inventor 张蒙戴浩文叶甜
Owner SUN YAT SEN UNIV