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

Unsaturated aldehyde selective oxidation catalyst and preparation method thereof

An oxidation catalyst, aldehyde selectivity technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as difficult and accurate control

Active Publication Date: 2015-05-27
PETROCHINA CO LTD
View PDF32 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tungsten bias on the surface side of the catalyst, and / or copper bias on the core side of the catalyst is difficult to accurately control

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
  • Unsaturated aldehyde selective oxidation catalyst and preparation method thereof
  • Unsaturated aldehyde selective oxidation catalyst and preparation method thereof
  • Unsaturated aldehyde selective oxidation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Preparation of catalyst (I)

[0037] Under stirring conditions, take 211.9 grams of ammonium molybdate and 46.8 grams of ammonium metavanadate and dissolve them in 500ml of pure water (water temperature above 65°C) to obtain slurry (1), then take 52.2 grams of ammonium paratungstate, 127.9 grams of copper nitrate, 14.5 grams Dissolve nickel nitrate, 48 grams of sodium stannate, and 5.8 grams of cesium nitrate in 1000 ml of pure water (water temperature above 65°C), stir well and mix evenly to obtain slurry (2). Then, the slurry (1) is mixed with the slurry (2) to obtain the slurry (3), ie to obtain the active ingredient slurry (a). Add 10.8 grams of silica powder and 1.4 grams of graphite to the active component slurry (a), stir vigorously at 80°C for co-precipitation reaction, heat and dry, roast at 460°C for 5 hours, and then grind it into a fine powder below 60 μm to obtain The catalyst (I) mainly consists of:

[0038] Mo 12 V 4 W 2 Cu 5.5 Ni 0.5 sn 1.8 Cs...

Embodiment 2

[0042] Preparation of Catalyst 2

[0043]Same as the preparation steps and main raw materials of embodiment 1 catalyst 1, just add 16.2 grams of lanthanum nitrate, catalyst (I) mainly consists of: Mo 12 V 5 W 4 Cu 2 Ni 3.7 sn 0.6 La 0.5 Si 2.2 o x . Take 97 parts of catalyst (I), 3 parts of magnesium-based lanthanum hexaaluminate, add deionized water and knead in a kneader, extrude through an extruder, roll and granulate into a spherical shape with a diameter of 2 mm, and roast at 450 ° C Catalyst 2 was obtained in 8 hours.

Embodiment 3

[0045] Same as the preparation steps and main raw materials of embodiment 1 catalyst 1, just add 11.8 gram potassium manganate, catalyst (I) mainly consists of: Mo 12 V 2 W 6.7 Cu 1 Ni 1.2 sn 1.0 Si 0.7 mn 0.6 o x . Take 95 parts of catalyst (I), 5 parts of magnesium-based lanthanum hexaaluminate, add deionized water and knead in a kneader, extrude into hollow columnar particles with a diameter of φ4.5×5mm, and roast at 500°C for 6 Catalyst 3 was obtained within hours.

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 diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to an unsaturated aldehyde selective oxidation catalyst which includes elements of molybdenum, vanadium, tungsten, copper, nickel and stannum. The catalyst is represented as the following general formula: MoVW<c>Cu<d>Ni<e>Sn<f>Si<g>M<h>O<x> (I). The catalyst also contains magnesium-based lanthanum hexaaluminate. The catalyst, which is used for preparing unsaturated acid, is prepared by mixing the compound (I) containing molybdenum and vanadium with the magnesium-based lanthanum hexaaluminate respectively according to mass percentage ratios of 86-96% and 0.1-8%, kneading the raw materials of the catalyst, moulding the catalyst, drying the catalyst and roasting the catalyst.

Description

technical field [0001] The invention relates to a catalyst for the selective oxidation of unsaturated aldehydes, which is suitable for the selective oxidation of acrolein or methacrolein to produce corresponding unsaturated acids, and is especially suitable for catalyzing the selective oxidation of acrolein to produce acrylic acid. Background technique [0002] Industrially, the reaction device for the oxidation of acrolein or methacrolein to prepare the corresponding unsaturated acid is mainly composed of multiple reaction tubes. On the premise of ensuring that the catalyst is not sintered and has a long service life, the selectivity and the yield of the target product should be improved as much as possible. Raw materials are saved. If the conversion rate of raw materials and the yield of acrolein and acrylic acid are increased by 0.1-0.5 percentage points, the amount of products obtained will increase by hundreds to thousands of tons, and the economic benefits will be consi...

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): B01J23/888B01J23/889C07C57/055C07C51/235
Inventor 王学丽马艳萍赵玉中耿占杰李晓银景志刚秦鹏杨红强曹帅英高杜娟林宏吴毅王芳范国宁陈红
Owner PETROCHINA CO LTD