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Solid phase reaction preparation method for iron-molybdenum process catalyst used for methanol oxidation to formaldehyde

A solid-phase reaction and catalyst technology, applied in the direction of catalyst activation/preparation, organic compound preparation, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of large waste water, difficult recycling and treatment, etc., and achieve simplified treatment Good process, selectivity and strength, and the effect of reducing production costs

Inactive Publication Date: 2017-04-26
大连瑞克科技股份有限公司
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Problems solved by technology

Although the above methods can produce activity and selectivity that can meet the requirements of the process of methanol oxidation to formaldehyde, they all have a common disadvantage: a large amount of waste water is generated during the preparation process, and recycling is difficult.

Method used

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  • Solid phase reaction preparation method for iron-molybdenum process catalyst used for methanol oxidation to formaldehyde

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Embodiment 1

[0017] Add 40 grams of ammonium heptamolybdate to the mortar, weigh 38.16 grams of ferric nitrate 9 water and divide it into 3 parts, first add one-third and mix and grind with ammonium heptamolybdate for 2 minutes, then add one-third and mix and grind for 2 minutes minutes, add the final third and continue grinding. As the grinding continues, the ground material turns bright yellow, the color gradually deepens, the viscosity increases, and it becomes hard after grinding for about 25 minutes, so stop grinding. The ground product was placed in an oven at 70°C and heated for 6 hours to complete the reaction. The reaction product was taken out, ground into powder, washed with deionized water to remove the generated ammonium salt, and heated in an oven at 120°C for 4 hours. The dried material was placed in an electric furnace and roasted at 480° C. for 4 hours to obtain 38.3 grams of an iron molybdate catalyst for the oxidation of methanol to formaldehyde.

[0018] The evaluatio...

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Abstract

A solid phase reaction preparation method for an iron-molybdenum process catalyst used for methanol oxidation to formaldehyde includes the steps of mixing and grinding ammonium molybdate and an iron salt to carry out a reaction to obtain ferric molybdate, and drying, washing, roasting, crushing and shaping the ferric molybdate to produce a ferric molybdate catalyst. The preparation method, compared with a conventional diluted water solution reaction with ammonium molybdate and iron salts such as ferric nitrate, ferric chloride and the like, can greatly reduce usage amount of water and quantity of waste water containing iron and molybdenum and ammonium salts, thereby simplifying treatment of waste water and reducing production cost of the catalyst. The catalyst has high activity, selectivity and strength, and can satisfy demand in the methanol oxidation to formaldehyde of iron-molybdenum process.

Description

technical field [0001] The invention relates to a solid-phase reaction preparation method of an iron-molybdenum method catalyst for methanol oxidation to formaldehyde, which belongs to the field of organic chemical catalysts. Background technique [0002] The production of formaldehyde from methanol is a large-scale modern industrial process. At present, there are two main production processes: 1. "Silver method" using metallic silver as a catalyst, 2. "Iron-molybdenum method" using iron-molybdenum oxide as a catalyst . The silver method is mainly used in China, and the iron-molybdenum method is mainly used abroad. Due to the "iron-molybdenum method" methanol oxidation to formaldehyde process is short, the catalyst has a long service life, the product concentration is high, the yield is high, and the quality is good, which can meet the needs of polyoxymethylene, low energy consumption, no "three wastes" emissions, safe and environmentally friendly And other outstanding adv...

Claims

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Application Information

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IPC IPC(8): B01J23/881C07C45/38C07C47/052
CPCB01J23/881B01J37/04B01J37/06B01J37/08C07C45/38C07C47/04
Inventor 周焕文乔川邓少亮曲雪琴
Owner 大连瑞克科技股份有限公司
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