Unlock instant, AI-driven research and patent intelligence for your innovation.

In-situ preparation method for catalyst for preparation of methylbenzene with benzene and methanol and co-production of p-xylene and light olefins

A technology of p-xylene and low-carbon olefins, applied in the field of chemical engineering, can solve the problems of huge investment, complex catalyst preparation process, and unmentioned content content, etc., to simplify the process, save preparation and transfer steps, and overcome technical prejudice Effect

Active Publication Date: 2018-11-13
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the technology reported above has also obtained higher PX selectivity, the preparation process of the catalyst is complex, requiring multiple modification and roasting processes, and a series of catalyst production devices need to be built, which requires a huge investment; in addition, this technology does not provide And the content of chain hydrocarbons in the product, the content of ethylene and propylene in the chain hydrocarbons, the content of toluene in aromatic products and the content of ethylbenzene in C 8 Content in aromatics

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
  • In-situ preparation method for catalyst for preparation of methylbenzene with benzene and methanol and co-production of p-xylene and light olefins
  • In-situ preparation method for catalyst for preparation of methylbenzene with benzene and methanol and co-production of p-xylene and light olefins
  • In-situ preparation method for catalyst for preparation of methylbenzene with benzene and methanol and co-production of p-xylene and light olefins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Example 1 Preparation of HZSM-5 shaped molecular sieve sample for fixed bed

[0075] 100g HZSM-5 zeolite molecular sieve raw powder (Nankai University Catalyst Factory, Si / Al=30) was calcined in air atmosphere at 550°C for 4 hours, then pressed into tablets, crushed, and sieved to obtain 40-60 mesh particles. Molecular sieve particles, denoted as FXHZSM-5-A.

[0076] 100g HZSM-5 zeolite molecular sieve raw powder (Nankai University Catalyst Factory, Si / Al=5) was calcined in air atmosphere at 550°C for 4 hours, pressed into tablets, crushed, and sieved to obtain 40-60 mesh particles. Molecular sieve particles, denoted as FXHZSM-5-B.

[0077]100g HZSM-5 zeolite molecular sieve raw powder (Nankai University Catalyst Factory, Si / Al=10) was calcined in air atmosphere at 550°C for 4 hours, then pressed into tablets, crushed, and sieved to obtain 40-60 mesh particles. Molecular sieve particles, denoted as FXHZSM-5-C.

Embodiment 2

[0078] Example 2 Preparation of HZSM-11 shaped molecular sieve sample for fixed bed

[0079] 100g HZSM-11 zeolite molecular sieve raw powder (Nankai University Catalyst Factory, Si / Al=35) was calcined in air atmosphere at 550°C for 4 hours, pressed into tablets, crushed, and sieved to obtain 40-60 mesh particles. Molecular sieve particles, denoted as FXHZSM-11-A.

[0080] 100g HZSM-11 zeolite molecular sieve raw powder (Nankai University Catalyst Factory, Si / Al=12) was calcined in air atmosphere at 550°C for 4 hours, pressed into tablets, crushed, and sieved to obtain 40-60 mesh particles. Molecular sieve particles, denoted as FXHZSM-11-B.

[0081] Example 3 Preparation of HZSM-5 shaped molecular sieve sample for fluidized bed

[0082] 100g of HZSM-5 zeolite molecular sieve former powder (Nankai University Catalyst Factory, Si / Al=30) is mixed with aluminum or silicon-containing amorphous binder and spray-dried to form. The specific steps are:

[0083] Mix the original powde...

Embodiment 4

[0086] Example 4 Preparation of HZSM-5 shaped molecular sieve sample for fluidized bed

[0087] The specific preparation conditions and steps are the same as those in Example 3, except that the raw material HZSM-5 zeolite molecular sieve raw powder is used in an amount of 10 kg, and the particle size distribution of the obtained microsphere particle sample is 20-120 μm, and the abrasion index is 1.2, which is recorded as FLHZSM -5-B.

[0088] The specific preparation conditions and steps are the same as in Example 3, the difference is that the raw material HZSM-5 zeolite molecular sieve powder has a silicon-aluminum ratio of Si / Al=10, the obtained microsphere particle sample particle size distribution is 20-100 μm, and the wear index is 1.2, denoted as FLHZSM-5-C.

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 an in-situ preparation method for a catalyst for preparation of methylbenzene with benzene and methanol and co-production of p-xylene and light olefins. The in-situ preparationmethod for the catalyst for preparation of the methylbenzene with the benzene and the methanol and co-production of the p-xylene and the light olefins is characterized by comprising the steps of enabling a phosphrus reagent, a silylated reagent and water vapor to be in contact with a molecular sieve in a reactor, and preparing the catalyst for preparation of the methylbenzene with the benzene andthe methanol and co-producing the p-xylene and the light olefins in situ. The reactor is a reactor for preparing the methylbenzene with the benzene and the methanol and co-producing the p-xylene andthe light olefins. According to the method, the catalyst is directly prepared in a reaction system, the flow of whole chemical production is simplified, preparation and transfer steps of the catalystare saved, and the in-situ preparation method is easy to operate.

Description

technical field [0001] The application relates to an in-situ preparation method of a catalyst for the co-production of p-xylene and light olefins from benzene and methanol to toluene, which belongs to the field of chemical engineering. Background technique [0002] Ethylene and propylene are the cornerstones of the huge petrochemical industry, and most organic chemical products are derived from ethylene and propylene. Paraxylene (PX) is a raw material for the production of polyesters such as PET (polyethylene terephthalate), PBT (polybutylene terephthalate) and PTT (polytrimethylene terephthalate). In recent years, a large number of applications of polyester in textiles, clothing, beverage packaging and other fields have driven the rapid growth of the production and consumption of PTA (purified terephthalic acid) and upstream products PX. At present, the source of PX is mainly produced from toluene, C9 aromatics and mixed xylene obtained from naphtha reforming through dispr...

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
IPC IPC(8): B01J29/40C07C1/20C07C2/86C07C11/04C07C11/06C07C15/08
CPCB01J29/40B01J2229/32B01J2229/34C07C1/20C07C2/864C07C2/865C07C2529/40C07C11/04C07C11/06C07C15/08C07C15/06Y02P20/52Y02P30/20Y02P30/40
Inventor 于政锡刘中民朱书魁杨越
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI