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

Catalyst for synthesizing unsaturated aldehyde and unsaturated carboxylic acid, method of preparing same, and method of synthesizing unsaturated aldehyde and unsaturated carboxylic acid with catalyst

An unsaturated, catalyst technology, used in catalyst activation/preparation, hydrocarbon oxidation to prepare oxygenates, carboxylate preparation, etc.

Inactive Publication Date: 2007-02-07
MITSUBISHI CHEM CORP
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, most of these disclosed methods are about the selection of additives added to the kneaded body during extrusion molding, and there are few examples that describe the details of the method for preparing the catalyst by extruding the kneaded body

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

preparation example Construction

[0047] The catalyst of the present invention of the extruded catalyst produced by the preparation method of the present invention is a catalyst containing at least molybdenum, bismuth and iron as metal elements related to its catalytic action, and may contain silicon, cobalt, nickel as additional elemental components , chromium, lead, manganese, calcium, magnesium, niobium, silver, barium, tin, tantalum, zinc, phosphorus, boron, sulfur, selenium, tellurium, cerium, tungsten, antimony, titanium, lithium, sodium, potassium, rubidium, cesium and thallium etc. More specifically, the catalysts of the present invention are preferably prepared to exhibit the formula

[0048] Mo a Bi b Fe c m d x e Y f Z g Si h o i

[0049] Indicates the average composition of the catalyst.

[0050] (In the formula, Mo, Bi, Fe, Si and O represent molybdenum, bismuth, iron, silicon and oxygen respectively, M represents at least one element selected from the group consisting of co...

Embodiment

[0059] Hereinafter, the present invention will be described more specifically based on Examples and Comparative Examples. These Examples are examples of the best mode of the present invention, but the present invention is not limited by the aspects of these Examples. In addition, in the descriptions of Examples and Comparative Examples, "parts" means parts by mass, and in the kneading process, a kneader equipped with a batch-type double-arm stirring blade was used. In addition, the composition analysis of the mixed gas containing the raw material supplied to the reaction tube and the gas containing the product taken out from the reaction tube after the reaction was performed by gas chromatography.

[0060] The reaction rate (hereinafter referred to as the reaction rate) of the raw material (propylene, isobutylene, TBA or MTBE) and the selectivity of the unsaturated aldehyde and unsaturated carboxylic acid produced in Examples and Comparative Examples were calculated by the fol...

Embodiment A-1

[0069] Add 500 parts of ammonium paramolybdate, 6.2 parts of ammonium paratungstate, 1.4 parts of potassium nitrate, 27.5 parts of antimony trioxide and 55.0 parts of bismuth trioxide into 1000 parts of pure water, and heat and stir (liquid A). Moreover, 114.4 parts of iron nitrate, 295.3 parts of cobalt nitrate, and 35.1 parts of zinc nitrate were sequentially added and dissolved in 1000 parts of pure water (B liquid). After adding liquid B to liquid A to form an aqueous slurry, the aqueous slurry was dried into dry spherical particles with an average particle diameter of 60 μm using a spray dryer. Then, the dried spherical particles were calcined at 300° C. for 1 hour to form a catalyst calcined product.

[0070] 25 parts of curdlan was added to 500 parts of the thus-obtained fired catalyst, followed by dry mixing. 160 parts of pure water were mixed therein, and after mixing (kneading) with a kneader until it became a clay-like substance, extrusion molding was performed usi...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The present invention provides novel extrusion-molded catalysts which is suitably usable in the synthesis of an unsaturated aldehyde and an unsaturated carboxylic acid by vapor-phase catalytic oxidation, which are prepared by molding-molding catalyst particles (or powders) comprising at least molybdenum, bismuth and iron as metallic elements participating in its catalytic action on this reaction, and which exhibit high catalytic activity and high selectivity for the unsaturated aldehyde and unsaturated carboxylic acid being desired products. When previously formed catalyst particles are subjected to extrusion molding, the catalyst particles are kneaded, for example, with a beta-1,3-glucan and a liquid. Then, the kneaded material is subjected to an extrusion molding step in which a ceramic material is used for at least a part of the catalyst flow path. Thereafter, the extrusion-molded material is dried, calcined and otherwise treated to obtain a final extrusion-molded catalyst.

Description

technical field [0001] The present invention relates to using propylene, isobutylene, tert-butyl alcohol (hereinafter referred to as TBA) and methyl tert-butyl ether (hereinafter referred to as MTBE) as raw materials, and using molecular oxygen as an oxygen source to carry out gas-phase catalytic oxidation to synthesize unsaturated aldehydes In the reaction with unsaturated carboxylic acid, the extruded catalyst that catalyzes the above-mentioned gas-phase catalytic oxidation reaction, more specifically, the present invention relates to the catalyst containing at least molybdenum, bismuth and iron as the relevant metal elements that play a catalytic role in the above-mentioned catalytic oxidation reaction Catalyst particles (powder) for synthesis of unsaturated aldehydes and unsaturated carboxylic acids by extrusion molding, production method using the extrusion molding and unsaturated aldehydes and unsaturated carboxylic acids using the related extrusion molding catalyst reso...

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 Patents(China)
IPC IPC(8): B01J23/88B01J27/192B01J37/00B28B3/20C07C27/12C07C45/32C07C47/22C07C51/21C07C57/05C07B61/00B01J23/00B01J23/887B01J23/888C07C45/34C07C45/35C07C51/25
CPCC07C45/34B01J37/0018B01J23/8885C07C45/35B01J23/002B01J23/8876C07C51/252C07C51/21B01J2523/00B01J37/0009C07C47/22C07C57/04B01J2523/15B01J2523/44B01J2523/51B01J2523/53B01J2523/54B01J2523/68B01J2523/69B01J2523/842B01J2523/845B01J2523/847B01J2523/13B01J2523/27
Inventor 近藤正英河藤诚一黑田彻
Owner MITSUBISHI CHEM CORP