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

Improved alkylation process

A technology for alkylating aromatics and alkylating agents, which is applied in chemical instruments and methods, purification/separation of hydrocarbons, catalysts, etc., and can solve problems such as lack of activity, increased requirements for catalysts in liquid phase processes, and no teaching of improvement methods. , to achieve the effect of reducing catalyst poisons

Active Publication Date: 2013-01-23
EXXONMOBIL CHEM PAT INC
View PDF59 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, by operating at relatively low temperatures, the liquid phase process places increased demands on the catalyst, especially in the case where unwanted by-products are not produced, bulky polyalkylated species must be converted to additional monoalkylated products In the transalkylation step of
This proves to be a serious problem in the case of cumene production where the existing catalyst either lacks the required activity or results in significant amounts of by-products such as ethylbenzene and n-propylbenzene
[0015] Although the prior art suggests that catalysts for the conversion of feedstocks containing alkylatable aromatic compounds and alkylating agents to alkylaromatic conversion products under at least partial liquid phase conversion conditions are made of porous crystalline materials, e.g., having a MWW framework structure type of aluminosilicate molecular sieve composition, but does not teach the improved method of the present invention

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 alkylation process
  • Improved alkylation process
  • Improved alkylation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] An amount of 16 g of material formulated in the form of 1 / 20 inch (0.13 cm) four-lobed granules containing MCM-49 (which has a MWW framework) was placed in the treatment zone (as a treatment composition) and in the alkylation reaction zone ( as a catalyst composition) in both places. The surface area / surface volume ratio of the quatrefoil material is about 180-220 in -1 (71-87cm -1 ). Benzene / ethylene molar ratio 50:1-70:1, about 60:1 at ambient pressure, WHSV about 21hr based on benzene -1 And at 180°C (liquid phase), benzene and ethylene containing 0.3 wppm of nitrogen in the form of N-formylmorpholine (hereinafter "N") were fed into the treatment zone. The effluent from the treatment zone is then fed to the alkylation reaction zone maintained at a temperature of 180°C mixed with ethylene and the mixture is in the liquid phase with a benzene / ethylene molar ratio of 18:1, and Based on ethylene, WHSV is 0.77hr -1 . The catalyst composition in the reaction zone was...

Embodiment 2

[0093] An amount of 16 g of MCM-49 (which has a MWW framework structure) formulated in the form of 1 / 20 inch (0.13 cm) four-lobed granules, crushed into 200-250 micron sized particles was placed in the treatment area (as Treatment composition) and an amount of 28 g of material formulated as 1 / 20 inch (0.13 cm) four-lobed particles containing MCM-49 was placed in the alkylation reaction zone (as the catalyst composition). The surface area / surface volume ratio of comminuted material (treatment composition) in the treatment zone is about 600-770 in -1 (236-303cm -1 ). The surface area / surface volume ratio of the quatrefoil material (catalyst composition) in the alkylation reaction zone is about 180-220 in -1 (71-87cm -1 ). Benzene / Ethylene molar ratio 9:1-26:1 at ambient pressure WHSV about 20hr based on benzene -1 And at 180°C (liquid phase), benzene and ethylene containing 0.3 wppm of N in the form of N-formylmorpholine were fed into the treatment zone. The effluent from ...

Embodiment 3

[0095] The amount of 16g ​​containing zeolite beta (it has a *BEA framework structure) is 180-220in surface area / surface volume ratio -1 (71-87cm -1 ) of the treatment composition formulated in the form of 1 / 20 inch (0.13 cm) quatrefoil granules was placed in the treatment area and an amount of 28 g of MCM-49 formulated in the form of 1 / 20 inch (0.13 cm) quatrefoil granules The material is placed in the alkylation reaction zone. At ambient pressure, the benzene / ethylene molar ratio is about 55:1, and the WHSV is about 21hr based on benzene -1 And at 180°C (liquid phase), benzene and ethylene containing 0.3 wppm of N in the form of N-formylmorpholine were fed into the treatment zone. (However, the selectivity of the treatment composition is very poor, producing about 2.5-4.0 times the amount of diethylbenzene as a MWW catalyst.) The effluent from the treatment zone mixed with ethylene is then fed to a In the reaction zone at temperature, and the mixture is in the liquid phas...

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to View More

Abstract

The present invention provides an improved process for producing an alkylated aromatic compound from an at least partially untreated alkylatable aromatic compound having catalyst poisons and an alkylating agent, wherein said alkylatable aromatic compound stream is treated to reduce catalyst poisons with a treatment composition having a surface area / surface volume ratio of greater than or equal to 30 in-1 (76 cm-1) in a treatment zone separate from an alkylation reaction zone under treatment conditions including a temperature of from about 30 DEG C to about 300 DEG C to form an effluent comprising said treated alkylatable aromatic compound.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit to US Provisional Patent Application Serial No. 61 / 346,763 (2010EM130), filed May 20, 2010, the contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to an improved process for the production of an alkylated aromatic compound from an at least partially unreacted alkylatable aromatic compound stream and an alkylating agent, wherein said at least partially alkylatable aromatic compound stream contains Catalyst poisons are at least partially removed by contacting the treatment composition. In particular, the present invention relates to a process for the production of ethylbenzene, cumene and sec-butylbenzene from a benzene stream containing catalyst poisons that are at least partially removed by contacting a treatment composition, preferably a porous crystalline material. Background technique [0004] Among the alkylar...

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): C07C2/66C07C15/073C07C15/085C07C7/12B01J29/08
CPCC07C2/66C07C2529/70C07C2529/40C07C2529/08C07C2529/18C07C7/12Y02P20/52C07C15/02C07C15/073C07C15/085C07C15/04C07C7/20B01J29/08B01J29/18B01J29/40B01J29/70
Inventor M·J·文森特V·南达T·E·埃尔顿
Owner EXXONMOBIL CHEM PAT INC
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