Toluene and methanol shape-selective alkylation catalyst and method thereof

An alkylation and catalyst technology, applied in the field of toluene and methanol shape-selective alkylation catalysts, can solve problems such as poor catalyst reaction stability, and achieve the effects of improving reaction stability, high activity and high selectivity

Inactive Publication Date: 2014-10-15
SHANGHAI HUAYI GRP CO
View PDF10 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is the problem of poor catalyst reaction stability in the prior art, and a new catalyst for toluene and methanol shape-selective alkylation is provided

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
  • Toluene and methanol shape-selective alkylation catalyst and method thereof
  • Toluene and methanol shape-selective alkylation catalyst and method thereof
  • Toluene and methanol shape-selective alkylation catalyst and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Using SiO 2 / Al 2 o 3 The molar ratio is 80g of 20MCM-22 molecular sieve and 20g of γ-Al 2 o 3 Mix, then add 6.0g of Tianqing powder and mix evenly, then add 3wt% dilute nitric acid as a binder, knead well and evenly, carry out extrusion molding, after drying at 120°C, roast at 540°C to obtain a shaped molecular sieve, which is recorded as MCM-22; The formed 50g MCM-22 molecular sieve is pre-vacuumized, impregnated with an equal volume of ammonium dihydrogen phosphate aqueous solution for 24 hours, dried at 120°C for 24 hours, and then roasted at 550°C for 4 hours, using a temperature program with a heating rate of 2°C / min, to obtain a catalyst loaded with phosphorus oxide; then impregnate it in a vacuum equal volume in an aqueous solution of lanthanum nitrate solution, dry at 120° C., and then roast at 540° C. for 4 hours. The solution was impregnated in equal volume for 24 hours, dried at 120°C, and then calcined at 540°C. The catalyst finally obtained contained ...

Embodiment 2

[0042] Using SiO 2 / Al 2 o 3 The molar ratio is 20MCM-22 molecular sieve 40g, silica sol (SiO 2 , 30%) 59g, γ-Al 2 o 3 Mix 19g and 5g of methyl cellulose evenly, extrude, dry at 120°C, and roast at 550°C to obtain a shaped molecular sieve, which is denoted as MCM-22; pre-vacuumize 50g of the formed MCM-22 molecular sieve, and use molybdic acid Immerse in an equal volume of ammonium aqueous solution for 24 hours, dry at 120°C for 24 hours, then roast at 550°C for 4 hours, use a temperature program at a rate of 2°C / min to obtain a solid that is impregnated with an equal volume of magnesium nitrate aqueous solution for 24 hours. Dry at 120°C for 24 hours, then calcinate at 550°C for 4 hours, use a temperature program at a rate of 2°C / min to obtain a catalyst loaded with molybdenum oxide and magnesium oxide; The petroleum ether solution of silicone oil is impregnated, and after impregnation, it is left to stand until the solvent is completely volatilized. After drying, it is ...

Embodiment 3

[0044] Using SiO 2 / Al 2 o 3 The molar ratio is 80g of 20MCM-22 molecular sieve and 20g of γ-Al 2 o 3 Mix, then add 5g of Tianqing powder and mix evenly, then add 3wt% dilute nitric acid as a binder and knead evenly, carry out extrusion molding, after drying at 120°C, roast at 540°C to obtain a molded molecular sieve, which is recorded as MCM-22; for 10g The formed MCM-22 molecular sieve is pre-vacuumized, vacuum-impregnated with the prepared aqueous solution of cobalt nitrate and ammonium molybdate, filtered off the excess solution, dried at 80°C for 24 hours, and then roasted at 540°C for 4 hours. Using a temperature program with a heating rate of 3°C / min, a catalyst loaded with cobalt oxide and molybdenum oxide was obtained; then pre-vacuumized, vacuum impregnated with an aqueous solution of magnesium nitrate and cerium nitrate, filtered off the excess solution, and dried at 80°C for 24 hours, then roasted at 540°C for 4 hours, using a temperature program, with a heatin...

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
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to a toluene and methanol shape-selective alkylation catalyst and a method thereof to mainly solve the problem of poor catalyst reaction stability in the prior art. The catalyst comprises the following components by weight: a) 40-90 parts of silicon-aluminum zeolite with a SiO2/Al2O3 mole ratio of greater than or equal to 20; b) 0.1-5.0 parts of a hydrogenation assistant; c) 0-10 parts of a nonmetallic oxide; d) 1.0-30 parts of at least one of rare earth metal oxides or alkali earth metal oxides; and e) 10-60 parts of aluminium oxide or a mixture of silicon dioxide and aluminium oxide. The technical scheme adopted by the invention well solves the problem, and the catalyst can be used in industrial production for synthesis of p-xylene through toluene and methanol shape-selective alkylation.

Description

technical field [0001] The invention relates to a catalyst for shape-selective alkylation of toluene and methanol and a method thereof. Background technique [0002] As the most important raw material for the synthesis of terephthalic acid and dimethyl terephthalate, the demand for xylene has been continuously increasing, and at present its main industrial production methods - xylene isomerization separation and toluene shape-selective disproportionation, There are the problems of low yield of xylene and low utilization rate of raw materials respectively. The synthesis of xylene from toluene and methanol through molecular sieve-catalyzed alkylation has always been considered as a production method that can replace the above two traditional processes, but the problem of poor reaction stability limits its large-scale industrialization. [0003] The document US7060864 discloses that the introduction of water during the alkylation reaction of toluene and methanol can effectivel...

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): B01J29/74B01J29/78B01J29/68B01J29/80C07C15/08C07C2/88
CPCB01J23/10B01J29/46B01J29/7088B01J29/7676B01J37/0009B01J37/28C07C2/864C07C2529/70C07C2529/74C07C2529/76C07C2529/78Y02P20/52C07C15/08
Inventor 唐建远朱志荣宁春利张春雷唐勇邢海军娄报华
Owner SHANGHAI HUAYI GRP CO
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