As a Formaldehyde Production Plant, let me share with you.
Comparison and contrast methods
We have noticed that the iron oxide formaldehyde production process is a more effective way to produce formaldehyde from methanol. However, in addition to the cost of raw materials, plants using the silver catalyst process may reduce operating costs. Therefore, if an inexpensive source of methanol is available, silver may be a better choice, especially for smaller operations. When deciding which formaldehyde production process to use, several other variables are involved:
Formaldehyde Production Silver Process
Factory capacity-low-capacity formaldehyde production equipment-it may be more economical to produce up to 5,000 tons of formalin per year using a less-tech silver process. Large-scale plants with an annual capacity of up to 100,000 tons are most suitable for the metal oxide catalyst formaldehyde production process. The increased production capacity of this process can help make up for higher capital expenditures in technology. Note that the excessive gas conduction that will be required makes facilities exceeding 100,000 tons per year inefficient. It is recommended that large-scale operations divide production into medium-scale metal oxide processing units.
Catalyst cost-Although it must be replaced several times a year, the overall cost of silver catalysts is lower than that of iron oxide catalysts with a service life of one year or more. This is because the silver catalyst can be completely regenerated, while molybdenum can only be recovered from the iron oxide catalyst.
Exhaust gas treatment-The exhaust gas from the silver production process contains about 20% hydrogen, which makes it combustible, produces steam and eliminates carbon monoxide and other organic compounds that are harmful to the environment. Due to the low content of dimethyl ether, carbon monoxide, methanol and formaldehyde, the tail gas produced in the iron oxide process is not combustible. Combustion requires catalytic incinerator or fuel addition.
Steam production-The metal oxide process generates enough steam heat that can be exported from the production unit to provide power for other processes. The relatively low steam production in the silver refining process is completely consumed in methanol rectification-sometimes not even enough, and steam must be fed from outside. There is never excess steam available for export.
Product purity-Compared with the silver method, the formaldehyde produced by metal oxide catalysis usually contains fewer impurities, such as formic acid, heavy metals and unreacted methanol. The industry increasingly requires that the methanol content in the formaldehyde solution is zero, and it is concentrated (the ratio of formaldehyde to water is as high as 4:1), and urea is a stable solution. These products are only possible using metal oxide catalysts in the production of formaldehyde.
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