Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Improved toluene disproportionation process

A process method and toluene technology, applied in the field of improved toluene disproportionation and transalkylation processes, can solve the problems of complicated process and increase equipment investment, and achieve the effects of reducing cooling load, saving consumption and reducing energy consumption

Active Publication Date: 2005-11-02
CHINA PETROLEUM & CHEM CORP +1
View PDF1 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of two toluene towers, the process is complicated; the steam at the top of the high-pressure toluene tower is only used as the heat source of the benzene tower, and the reduction in energy consumption is not large; the xylene tower also needs to be operated under pressure, which increases the investment in equipment

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
  • Improved toluene disproportionation process
  • Improved toluene disproportionation process
  • Improved toluene disproportionation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The flow of this embodiment is figure 2 The improved toluene shape-selective disproportionation process, the toluene tower is operated under pressure, and the heat source of the reboiler of the stabilization tower, benzene tower and steam generator is toluene steam connected in series.

[0034] Taking 25000kg / h fresh toluene feed as an example, the fresh toluene raw material and its properties and reaction liquid products are the same as those of the comparative example. The results of the temperature and heat load of each tower are shown in Table 2. From the data in Table 2, it can be seen that since the toluene tower adopts a pressurized design operation, when the pressure is increased to 1MPa, the temperature of the toluene tower overhead steam after passing through the benzene tower reboiler is 217.2°C, and the gasification rate becomes 0.478 , and then after passing through the reboiler of the stabilizing tower, the temperature is still 217.2°C, and the gasificati...

Embodiment 2

[0036] The flow of this embodiment is image 3 The improved toluene shape-selective disproportionation process, the toluene tower is operated under pressure, and the heat source of the reboiler of the stabilizing tower, benzene tower and steam generator is toluene steam connected in parallel.

[0037] Taking 25000kg / h fresh toluene feed as an example, the fresh toluene raw material and its properties and the composition of the reaction liquid product are the same as those of the comparative example. The results of the temperature and heat load of each tower are shown in Table 3. The investment in improving the shape-selective disproportionation process increases, but the annual operating cost is reduced due to the reduction of energy consumption. The energy consumption of the improved toluene shape-selective disproportionation process in this example is reduced to 3902 MJ / t.

[0038] Raw material properties

[0039] comparative example

[0040] ...

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 improved technological process of shape selectively disproportionating toluene includes making toluene and toluene shape selectively disproportionating catalyst to contact for reaction; separating the reaction effluent to obtain benzene, C8-C10 arene and un-reacted toluene; and utilizing the un-reacted toluene vapor as the heat source for stabilizing tower, benzene tower and optional vapor generator. The said process can lower the power consumption of toluene tower, recover the latent heat in top toluene vapor, omit the consumption of high pressure vapor in the bottom of the stabilizing tower and the medium pressure vapor in the bottom of benzene tower, and reduce the operation cost of the stabilizing tower and the benzene tower.

Description

technical field [0001] The invention belongs to an improved toluene disproportionation and transalkylation process, more specifically, a method for improving the separation part of the reaction liquid product of the toluene shape-selective disproportionation process. Background technique [0002] Aromatics (BTX) directly extracted and separated from catalytic reformed oil, pyrolysis gasoline and coker light oil cannot meet the needs of downstream products for individual products. Generally speaking, compared with the aromatic hydrocarbons directly obtained from the above resources, the market demand for p-xylene (especially p-xylene) is larger and cannot meet the demand. However, toluene and heavy aromatics (C9, C10) are surplus species. Therefore, using toluene and C9 to generate benzene and xylene, which are widely used and in short supply through toluene shape-selective disproportionation or reaction of toluene and C9 alkyl, to meet market requirements is a common method...

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): C07C15/08
CPCY02P20/50Y02P20/52
Inventor 刘劲松杨克勇顾昊辉刘中勋施昌智
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com