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

Ammoxidation catalyst, preparation method thereof and method for preparing isophthalonitrile

A catalyst and ammoxidation technology, which is applied in the preparation of hydrocarbon ammoxidation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of low conversion rate, poor economy, and unsuitability for industrial scale-up production To achieve the effect of inhibiting ammonolysis and deep oxidation, reducing the activation energy of the reaction, and facilitating industrial application

Active Publication Date: 2022-02-15
WANHUA CHEM GRP CO LTD
View PDF14 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent EP37123 discloses a V-Cr-Sb / TiO 2 Catalyst, the yield of isophthalonitrile catalyst is 82.5%, but the preparation process is relatively complicated, it is not suitable for industrial scale-up production, and the economy is poor
[0006] The applicant found in the research that the reaction temperature of the existing ammoxidation catalyst is 300-500°C, and the conversion rate is low at low temperature reaction. Increasing the reaction temperature will easily lead to serious deep oxidation reaction, and the content of by-products carbon monoxide, carbon dioxide and hydrogen cyanide is obvious. increase, aromatic nitrile yield decreased
In addition, the ammoxidation reaction is a strong exothermic reaction, and increasing the reaction temperature will easily cause heat transfer difficulties, leading to problems such as runaway reaction and reactor overheating.

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
  • Ammoxidation catalyst, preparation method thereof and method for preparing isophthalonitrile
  • Ammoxidation catalyst, preparation method thereof and method for preparing isophthalonitrile
  • Ammoxidation catalyst, preparation method thereof and method for preparing isophthalonitrile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Heat 2100g deionized water to 75°C and stir at 200rpm, add 1936g oxalic acid H 2 C 2 o 4 Add water to form oxalic acid solution, then add 455g vanadium pentoxide V 2 o 5 , 497g lead nitrate Pb (NO 3 ) 2 and 500g of water, and 23g of palladium nitrate Pd(NO 3 ) 2 , stirred for 20mins to form a mixed solution containing V, Pb, and Pd. SiO with a content of 40% 2 Silica sol 2700g joins in the above-mentioned solution under stirring, then adds the ferric nitrate Fe of 1212g (NO 3 ) 3 9H 2 A solution composed of O and 1500g of water was added containing 17.6g of iridium chloride IrCl 3 ·3H 2 O and 1736g of cerium nitrate Ce (NO 3 ) 3 ·6H 2 Aqueous solution of O 3100g.

[0037] The formed aqueous solution was stirred at 95° C. at 300 rpm for 120 mins, then heated to 110° C. for aging, and evaporated to a solid content of 35% by weight to form a viscous slurry. The slurry was spray-dried at an inlet temperature of 280° C. and an outlet temperature of 130° C. t...

Embodiment 2

[0040] Heat 2300g deionized water to 85°C and stir at 300rpm, add 2113g oxalic acid H 2 C 2 o 4 Add water to form oxalic acid solution, according to the general formula V 1.0 Pb 0.1 PD 0.05 co 0.5 Pt 0.002 La 0.002 o x The quantity ratio of each metal element in the method is that 455g of vanadium pentoxide, and a corresponding amount of lead nitrate, palladium nitrate and additional water are 824g in total, and are configured with reference to Example 1 to form a mixed aqueous solution containing V, Pb, and Pd. Then the content of 40% SiO 2 2800g of silica sol was added into the above solution under stirring, and then a corresponding amount of cobalt nitrate, platinum chloride and lanthanum nitrate and additional water were added to about 4800g in total.

[0041] The formed aqueous solution was stirred at 90° C. at 300 rpm for 120 mins, then heated to 115° C. for aging, and evaporated to a solid content of 35% by weight to form a viscous slurry. The slurry was spray...

Embodiment 3

[0044] Heat 2000g deionized water to 90°C and stir at 300rpm, add 2100g oxalic acid H 2 C 2 o 4 Add water to form oxalic acid solution, according to the general formula V 1.0 Pb 0.5 PD 0.1 Ni 1.0 Rh 0.03 Nd 0.01 o x The quantity ratio of each metal element in the method is that vanadium pentoxide 455g, and corresponding amount of lead nitrate, palladium nitrate and additional water are about 1553g in total, with reference to embodiment 1 configuration to form a mixed aqueous solution containing V, Pb, and Pd. Then the content of 40% SiO 2 Silica sol 3000g is added in the above-mentioned solution under stirring, then add corresponding amount of nickel nitrate, rhodium nitrate and neodymium nitrate and extra water about 5400g altogether.

[0045] The formed aqueous solution was stirred at 85° C. at 300 rpm for 120 mins, then heated to 105° C., left to age, and evaporated to a solid content of 40% by weight to form a viscous slurry. The slurry was spray-dried at an inle...

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

No PUM Login to View More

Abstract

The invention discloses an ammoxidation catalyst, a preparation method thereof and a method for preparing isophthalonitrile. The active component of the catalyst satisfies the general formula: V 1.0 Pb a PD b A c B d C e o x ; Wherein A is one or more of Fe, Co, Ni, K, Rb, Cs, B is one or more of Ir, Pt, Rh, Ru, C is Nd, Pr, Ce, La One or more of them; a=0.05~2, b=0.01~2, c=0.01~5, d=0.001~2, e=0.001~0.9, x is a numerical value determined by the degree of oxidation of each element. The catalyst is used to prepare isophthalonitrile through ammoxidation reaction of m-xylene. By accurately controlling the ratio of Pb and Pd, the reaction activation energy can be effectively reduced in the ammoxidation reaction. The conversion rate is high, the selectivity and yield of isophthalonitrile are high, and it is suitable for industrialization.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to an ammoxidation catalyst and a preparation method thereof, and a method for preparing isophthalonitrile by using the catalyst in the ammoxidation reaction of m-xylene. Background technique [0002] Aromatic nitriles such as isophthalonitrile are fine chemical intermediates with a wide range of uses. Utilizing the high reactivity of its cyano group and its ability to activate other parts with strong chemical activity, through hydrolysis, hydrogenation, addition, Condensation, polymerization, halogenation and other reactions can synthesize a series of fine chemical products, and are important raw materials for the manufacture of pesticides, medicines, dyes, spices, oils, fuel additives, etc., such as isophthalonitrile synthesized by chlorination. Isophthalonitrile (i.e. chlorothalonil) is a broad-spectrum fungicide with high efficiency and low toxicity; An important intermediate o...

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): B01J23/648B01J23/89C07C253/28C07C255/51
Inventor 胡进于海彬吴一敏周英浩万毅易光铨孙康初乃波黎源华卫琦
Owner WANHUA CHEM GRP CO LTD