High-performance catalyst for preparation of benzene by cyclotrimerization of acetylene as well as preparation method and application thereof

A catalyst and cyclotrimerization technology, which is applied in the direction of catalysts, molecular sieve catalysts, carbon compound catalysts, etc., can solve problems such as difficult industrial applications, and achieve the effects of mild reaction conditions, simple operation, and great application prospects

Active Publication Date: 2016-04-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF8 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although studies have shown that the surface of Pd(111) single crystals has good low-temperature cyclotrimerization performance, the process needs to be carried out under ultra-high vacuum conditions, which is difficult for industrial application.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-performance catalyst for preparation of benzene by cyclotrimerization of acetylene as well as preparation method and application thereof
  • High-performance catalyst for preparation of benzene by cyclotrimerization of acetylene as well as preparation method and application thereof
  • High-performance catalyst for preparation of benzene by cyclotrimerization of acetylene as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Pd / Ru / Rh / SiO 2 Catalyst preparation

[0023] The macroporous silica gel was calcined in an air atmosphere at 500°C for 6 hours and then reduced to room temperature. Weighed 50g of the calcined macroporous silica gel carrier and added the same volume to PdCl 2 In aqueous solution, PdCl 2 The loading amount is recorded as 0.5% of the macroporous silica gel by the mass of Pd, and immersed for 6h at room temperature. After the resulting mixture is dried at 110°C, it is heated at 10°C / min to 500°C in an air atmosphere and calcined for 3h to obtain Pd / SiO supported by macroporous silica gel. 2 Catalyst, denoted as Pd(0.5) / SiO 2 .

[0024] Then, add the same volume of the catalyst to RuCl 3 And RhCl 3 In mixed water solution, RuCl 3 And RhCl 3 The loading amount is recorded as 0.2% and 1.3% of the macroporous silica gel based on the mass of Ru and Rh, and immersed for 10 hours at room temperature. The resulting mixture was dried at 110°C, and then heated at 10°C / min to 550°C in an ...

Embodiment 2

[0026] Preparation of Pd / Ru / Rh / MCM-41 catalyst

[0027] The MCM-41 was calcined at 500°C in an air atmosphere for 6 hours and then lowered to room temperature. Weighed 50g of the calcined MCM-41 carrier, and impregnated it with PdCl in an equal volume. 2 Aqueous solution, PdCl 2 The load is recorded as 0.5% of MCM-41 by the mass of Pd, and it is immersed in an aqueous solution for 6 hours at room temperature. The resulting mixture was dried at 110°C, and then heated at 10°C / min to 550°C in an air atmosphere and calcined for 3 hours to obtain the MCM-41 supported Pd / MCM-41 catalyst, denoted as Pd(0.5) / MCM-41 .

[0028] Impregnate the sample in an equal volume and add RuCl 3 And RhCl 3 In the mixed aqueous solution, RuCl 3 And RhCl 3 The loading amount is recorded as 0.2% and 1.3% of MCM-41 in terms of Ru and Rh masses. After being configured as an aqueous solution, it is immersed at room temperature for 10 hours. After the resulting mixture was dried at 110°C, it was heated at 10°C...

Embodiment 3

[0030] Preparation of Pd / Ru / Rh / SBA-15 catalyst

[0031] The SBA-15 was calcined in an air atmosphere at 500°C for 6 hours and then lowered to room temperature. Weighed 50g of the calcined SBA-15 carrier, and impregnated it with PdCl in an equal volume. 2 Aqueous solution, PdCl 2 The load is recorded as 0.5% of SBA-15 by the mass of Pd, and it is immersed in an aqueous solution for 12 hours at room temperature. The resulting mixture was dried at 110°C, and then heated at 10°C / min to 550°C in an air atmosphere and calcined for 3 hours to obtain the SBA-15 supported Pd / SBA-15 catalyst, which was recorded as Pd(0.5) / SBA-15 .

[0032] Impregnate the sample in an equal volume and add RuCl 3 And RhCl 3 In the mixed aqueous solution, RuCl 3 And RhCl 3 The loading amount is 0.5% and 1% of SBA-15 in terms of Ru and Rh mass. After being prepared as an aqueous solution, it is immersed at room temperature for 6 hours. After the resulting mixture was dried at 110°C, it was heated at 10°C / min to...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a high-performance catalyst for preparation of benzene by cyclotrimerization of acetylene as well as a preparation method and an application thereof. The catalyst is a supported high-dispersion palladium, ruthenium, rhodium composite transition-metal catalyst which is prepared by using an ordered mesoporous material MCM-41 or/and SBA-15 as a carrier, the MCM-41 and SBA-15 mesoporous molecular sieve with highly ordered structures are selected as the carrier, and a step-by-step incipient-wetness impregnation method is used for preparing the supported composite palladium, ruthenium, rhodium transition-metal catalyst. Good dispersion of transition metals is formed by the ordered mesoporous material with large specific surface, and reaction performance of preparation of benzene by cyclotrimerization of acetylene is effectively improved.

Description

Technical field [0001] The invention belongs to the field of chemistry and chemical engineering, and relates to a high-performance catalyst for preparing benzene by acetylene ring trimerization, and a preparation method and application thereof. Background technique [0002] Light aromatic hydrocarbons such as benzene, toluene and xylene (the three are collectively referred to as BTX), as the most basic organic chemical raw materials, are widely used in the production of chemical products such as rubber, fibers, plastics, and dyes. At present, aromatics are mainly derived from catalytic reforming and hydrocarbon cracking in petrochemical industry (about 90%), and only about 10% are from coal chemical industry. In recent years, on the one hand, petroleum resources have gradually decreased. On the other hand, the increasing demand for synthetic materials and other fine chemicals has created higher demand for aromatics production. Therefore, it is imperative to develop new technologi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J29/03B01J29/035C07C2/48C07C15/04
CPCY02P20/52B01J23/464B01J29/0325B01J29/0354C07C2/48C07C2523/46C07C2529/03C07C2529/035C07C15/04
Inventor 徐力许磊张晓敏袁扬扬陈欣
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap