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Oxidation catalyst as well as preparation method and application thereof

A technology of oxidation catalyst and catalyst, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., which can solve the problem of powder or piece falling off and weak adhesion , affect the catalyst effect and long-term service life, etc., to achieve the effect of increasing the conversion rate and increasing the weight yield

Active Publication Date: 2021-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the spraying process mostly uses high-temperature spraying, there is a problem that a large amount of active substances will be taken away with the evaporation of the solvent; in addition, the company found in the use of catalysts that the active substances attached to the carrier in solid form and the carrier have a problem of weak adhesion. , causing certain powder or pieces to fall off during the process of carrying, loading or using the catalyst, thus affecting the actual effect and long-term service life of the catalyst

Method used

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  • Oxidation catalyst as well as preparation method and application thereof
  • Oxidation catalyst as well as preparation method and application thereof
  • Oxidation catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] At room temperature, weigh 173.4g of oxalic acid (90.0g / mol) and dissolve it in 600mL of deionized water, and stir until dissolved; while stirring, add 112.7g of ammonium metavanadate (117.0g / mol) to it to obtain solution 1; Take by weighing 51.0g ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 , 1235.9g / mol) was dissolved in 100mL of deionized water at 50°C to obtain solution 2; 0.56g of nickel nitrate (290.7g / mol), 3.89g of iron nitrate (404.0g / mol), 0.29g of rubidium nitrate (147.7 g / mol), 2.37g trisodium phosphate (164.3g / mol) and 0.89g boric acid (61.8g / mol) were gradually added to 100 milliliters of deionized water at 50°C to obtain dispersion system 3; weighed 1.97g indium acetate ( 292.0g / mol) was added into 100mL of dilute acetic acid solution with a mass fraction of 5%, and stirred to obtain dispersion system 4; And 300g of sodium carboxymethyl cellulose solid content is 5% aqueous dispersion is poured into the colloid mill rapidly at the same time, mixed and emul...

Embodiment 2

[0111] At room temperature, weigh 177.7g of oxalic acid (90.0g / mol) and dissolve it in 600mL of deionized water, and stir until dissolved; while stirring, add 112.7g of ammonium metavanadate (117.0g / mol) to it to obtain solution 1; Take by weighing 34.0g ammonium molybdate ((NH 4 ) 6 Mo 7 o 24, 1235.9g / mol) was dissolved in 100mL of deionized water at 50°C to obtain solution 2; 1.79g boric acid (61.8g / mol), 1.40g nickel nitrate (290.7g / mol), 3.75g cesium nitrate (194.9g / mol), 1.40g cobalt nitrate (291.1g / mol) and 0.41g phosphorus pentoxide (141.9g / mol) were gradually added to 100 ml of deionized water at 50°C to obtain dispersion system 3; weigh 1.41g of indium acetate (292.0g / mol) was added into 100mL deionized water, stirred to obtain dispersion system 4; after solution 1 was reacted for 0.5 hours, solution 1, solution 2, dispersion system 3, dispersion system 4, 100mL formamide and 200g vinyl acetate - The mixed system of the aqueous dispersion with ethylene content of...

Embodiment 3

[0115] At room temperature, weigh 182.0g of oxalic acid (90.0g / mol) and dissolve it in 600mL of deionized water, and stir until dissolved; while stirring, add 112.7g of ammonium metavanadate (117.0g / mol) to it to obtain solution 1; Take by weighing 37.4g ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 , 1235.9g / mol) was dissolved in 100mL of deionized water at 50°C to obtain solution 2; 2.80g of nickel nitrate (290.7g / mol), 1.73g of magnesium nitrate (256.4g / mol), 0.78g of potassium nitrate (101.1 g / mol), 1.58g trisodium phosphate (164.3g / mol) and 1.96g cobalt nitrate (291.1g / mol) were gradually added to 100 ml of deionized water at 50°C to obtain dispersion system 3; weigh 0.78g pentoxide Diantimony (323.5g / mol) was added to 100mL of dilute nitric acid solution with a mass fraction of 10%, and stirred to obtain dispersion system 4; after solution 1 was reacted for 0.5 hours, solution 1, solution 2, dispersion system 3, dispersion system 4 , 100mL of pyrrolidone and 100g of an aqu...

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Abstract

The invention discloses an oxidation catalyst and a preparation method and application thereof, wherein the oxidation catalyst comprises a first vanadium-molybdenum catalyst and / or a second vanadium-molybdenum catalyst, the first vanadium-molybdenum catalyst and / or the second vanadium-molybdenum catalyst independently contain vanadium, molybdenum, nickel and an auxiliary agent, and wherein, the average oxidation state of vanadium in the first vanadium-molybdenum catalyst is lower than the average oxidation state of vanadium in the second vanadium-molybdenum catalyst. In the process of preparing the catalytic active substance precursor, the oxidation state of the main metal vanadium in the active substance precursor is modulated by using an oxidation-reduction reaction, and the main metal vanadium is coupled with different types of metal additives. When the catalyst is applied to a reaction for oxidative synthesis of maleic anhydride, under the condition that the benzene concentration is 40-65 g / Nm3, the benzene conversion rate reaches more than 98%, and the weight yield of maleic anhydride reaches 94-99%. Under the same operation conditions, the conversion rate of benzene can be increased by 3.6% at most, and the weight yield of maleic anhydride can be increased by 4.4% at most.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to an oxidation catalyst and its preparation method and application, in particular to a catalyst for preparing maleic anhydride (maleic anhydride for short) through selective oxidation. Background technique [0002] Maleic anhydride (maleic anhydride) is mainly used in the production of unsaturated polyester resins, especially glass fiber reinforced unsaturated polyester resins, as parts of vehicles (ships, automobiles, etc.) and in the production of corrosion-resistant chemicals Raw materials for devices and daily necessities for decoration. In addition, maleic anhydride can also be used to prepare nearly a hundred kinds of downstream fine chemical organic intermediates and special chemicals such as coatings, lubricating oil additives, agricultural chemicals, and paper chemicals. [0003] The production of maleic anhydride in the world mainly uses n-butane and benzene as the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/199B01J37/02B01J37/08C07D307/60
CPCB01J27/199B01J23/002B01J37/0219B01J37/0018C07D307/60B01J2523/00B01J2523/14B01J2523/305B01J2523/33B01J2523/51B01J2523/55B01J2523/68B01J2523/842B01J2523/847B01J2523/15B01J2523/845B01J2523/13B01J2523/22B01J2523/53
Inventor 师慧敏张东顺袁滨冯晔张作峰
Owner CHINA PETROLEUM & CHEM CORP
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