What kind of water do most manufacturers that produce formaldehyde use for absorption nowadays?
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I heard that most formaldehyde manufacturers now use tap water instead of water intended for absorption processes, in order to save costs. Of course, this has little impact on the construction and adhesive industries, but it’s hard to say what the effect will be on the pharmaceutical and fine chemical industries
It mainly depends on the impact on downstream products
Reply to 2# Perstorp: Who can tell me which factories are still actually using deionized water to produce formaldehyde?
Most formaldehyde used in adhesives is sourced from well water, but in some areas the iron ion concentration is high; in such cases, it is necessary to remove some of these ions when using it for applications with higher requirements.
Perstorp also has requirements for process water, such as chloride, fluoride, and iron content. In fact, downstream products of formaldehyde have higher requirements in this regard.
Tap water contains high levels of chloride ions, making it unsuitable for use; generally, formaldehyde treatment devices are made of 304 material, which is prone to corrosion.
Reply to 8# daimin234234: Generally, the resistivity is greater than 1