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

Catalyst for use in production of methacrylic acid, method for producing said catalyst, and method for producing methacrylic acid using said catalyst

A technology of methacrylic acid and manufacturing method, which is applied in the direction of catalyst activation/preparation, heterogeneous catalyst chemical elements, organic chemical methods, etc. It can solve the problems of insufficient catalyst life to meet the reaction yield and achieve high selectivity.

Inactive Publication Date: 2015-01-21
NIPPON KAYAKU CO LTD
View PDF10 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the above-mentioned adjustment method is not sufficient in satisfying both the reaction yield (activity and selectivity) and the catalyst life, and further improvement is required.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] 1) Preparation of catalyst

[0069] 800 g of molybdenum trioxide, 30.33 g of vanadium pentoxide, and 76.87 g of 85% by mass orthophosphoric acid were added to 5680 ml of pure water, and heated and stirred at 92° C. for 3 hours to obtain a reddish-brown transparent solution. Next, the solution is cooled to 0-20° C., and the power Pv required for stirring per unit volume is 0.77 [kW / m3 ], slowly added 661.32 g of 9.1% by mass cesium hydroxide aqueous solution, and aged at 15 to 20° C. for 1 hour to obtain a yellow slurry. Next, 196.86 g of 50.0 mass % ammonium acetate aqueous solution was added slowly to this slurry, and it aged at 0-30 degreeC for 1 hour further. Next, 22.18 g of copper acetate was further added to this slurry, and it stirred and mixed at 0-30 degreeC until it melt|dissolved completely. Next, the slurry was spray-dried to obtain a solid catalyst active component. The composition of the catalyst active component solid obtained by the raw material chargi...

Embodiment 2

[0075] Except that the power Pv required for stirring per unit volume in Example 1 is 3.1 [kW / m 3 ], a coated catalyst was prepared in the same manner as in Example 1, except that stirring was carried out under the conditions of Example 1. Table 1 shows the obtained results.

Embodiment 3

[0079] Except that all raw materials in embodiment 1 are increased to 230 times in proportion and the power Pv required for stirring per unit volume is 1.8 [kW / m 3 ], a coated catalyst was prepared in the same manner as in Example 1, except that stirring was carried out under the conditions of Example 1. Table 1 shows the obtained results.

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
boiling pointaaaaaaaaaa
Login to View More

Abstract

The purpose of the present invention is to provide a method for producing a catalyst for use in the production of methacrylic acid through the vapor-phase catalytic oxidation of methacrolein, isobutylaldehyde or isobutyric acid with high yield and high selectivity. A catalyst produced by adding an alkali metal element, particularly cesium among alkali metal elements, to a partially neutralized salt of a heteropoly acid by a specific method, wherein the partially neutralized salt contains Mo, V, P, an alkali metal element and NH4 as essential active components. The catalyst is characterized by having extremely high catalytic performance.

Description

technical field [0001] The present invention relates to a catalyst for producing methacrylic acid by gas-phase catalytic oxidation of methacrolein, isobutyraldehyde or isobutyric acid using a catalyst having high activity and high selectivity, a production method thereof, and methacrylic acid using the catalyst manufacturing method. Background technique [0002] As catalysts for producing methacrylic acid by gas-phase catalytic oxidation of methacrolein, isobutyraldehyde, or isobutyric acid, a large number of catalysts have been proposed. These catalysts use molybdenum and phosphorus as main components, and have the structure of heteropolyacid and / or its salt. [0003] For example, in Patent Document 1, as a method for preparing a catalyst for acrolein or methacrolein synthesis, a method is disclosed in which two or more solutions or dispersions containing catalyst components are mixed for as short a time as possible, and then the obtained The mixture of is spray-dried imm...

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): B01J27/199B01J37/04B01J37/08C07C51/235C07C57/055C07B61/00
CPCC07C51/235C07C51/252B01J23/002B01J37/0045C07C51/377B01J27/199B01J2523/00B01J37/0009B01J37/04C07C57/04B01J2523/15B01J2523/17B01J2523/51B01J2523/55B01J2523/68B01J37/08C07B61/00Y02P30/00B01J27/24
Inventor 酒井秀臣西村英二江尻知幸
Owner NIPPON KAYAKU CO LTD
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