Fe-Mo catalyst for preparing formaldehyde through methanol oxidation and preparation process thereof

A catalyst and oxidation technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., to achieve the effect of easy sedimentation

Active Publication Date: 2004-11-17
SINOPEC NANJING RES INST OF CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on the use of industrial products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Under vigorous stirring, to 2660ml, concentration is 15% (weight concentration), in the ammonium heptamolybdate and the ammonium metavanadate aqueous solution (wherein V / (Mo+V) mol ratio is 0.014) that pH value is~2.5, first Add 16.0 grams of chromium oxide, then slowly add 3000ml, a concentration of 10% ferric nitrate aqueous solution, when the pH value of the co-precipitation reaction suspension is 1.8, adjust the required pH value of the reaction with ammonia until the end of the precipitation, the precipitation reaction It took 27 minutes. After the precipitation is complete, continue to stir for 2 hours; stop stirring, settle, remove the supernatant by siphon method, and then wash three times with deionized water; then filter to separate the precipitate from the mother liquor; bake the filter cake at 80°C for 24 hours, Bake at ~180°C for several hours, and the obtained dry material is ready for use. The (Mo+V) / (Fe+Cr) atomic ratio of the catalyst was 2.6, the Cr / (...

Embodiment 1-1

[0016] Take 150 grams of the above-mentioned catalyst dry material, add water to granulate it into small particles with a diameter of 1.6-2.0 mm, and dry it at 100 ° C; add 6 grams of stearic acid to the obtained dry material, mix well; press it into φ4.5×1.0, length It is a hollow cylinder of 4.5; finally, it is fired at 430°C for 3 hours to obtain sample NCF-1-1.

Embodiment 1-2

[0018] Take 150 grams of the above-mentioned catalyst dry material, add 15 grams of safflower powder, mix well, add water and knead; then extrude into a hollow cylinder with a diameter of 4.5×1.0 and a length of 4.5; Calcined at high temperature for 3 hours to obtain sample NCF-1-2.

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Abstract

The invention refers to a kind of formaldehyde iron phase catalyst made up by oxidizing in industrial alcohol and the manufacturing method. Oxide of chromium and vanadium are added into the iron-molybdenum catalyst system, forms the four-component catalyst system; the shape of the catalyst is designed as a hollow cylinder ring structure, it has low catalyst bed resistance in using, the catalyst has a high alcohol converting rate and high yield of formaldehyde, the heat stability of catalyst is good and the lifespan is long.

Description

Technical field: [0001] The invention belongs to the field of organic chemical catalysts, in particular to an industrial iron-molybdenum catalyst for oxidation of methanol to formaldehyde and a preparation method thereof. Background technique: [0002] Formaldehyde is an important basic organic chemical raw material, has become a large-scale production and consumption of chemical products, widely used in chemical industry, medicine, textile, wood processing and petroleum industry. Modern industrial formaldehyde production mainly adopts the oxidation method preparation process with methanol as raw material. Since the iron molybdenum oxide catalyst was used in the industrial production of methanol oxidation to formaldehyde in 1952, it has been widely developed and utilized due to its performance advantages. [0003] There are many foreign patents for preparing iron-molybdenum catalysts, such as US Patent Publication No. 3,408,309, published on October 29, 1968, which is a two...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/881C07C47/052
Inventor 张皓黄建明殷惠琴陈海波孙远龙田先国
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD
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