Formaldehyde
Deacidification
Formaldehyde (CH2O) is the simplest of the aldehydes and the most important commercially.
Formaldehyde is primarily used for formaldehyde resins, butanediol, polyacetal resins, and methylene-bis-(4-phenyl isocyanate) (MDI). The market is growing approximately 3% per year. Formaldehyde is made from the oxidation of methanol through a silver or mixed oxide catalyst.
The reaction is exothermic. Formic acid is a by-product and is removed with a weak base anion exchange resin such as Amberlyst™ A24.
|
CH3OH
|
 |
HCHO + H2 |
|
Methanol
|
Formaldehyde
|
Typical Operating Conditions
|
Influent Composition |
Formol = 30 - 50% Formic acid = 0.02 - 1 % |
|
Influent Temperature |
50 - 80 °C |
|
Flow Rate |
2 - 5 BV/h |
|
Operating Capacity |
50 g HCOOH/L |
|
Regenerant Type |
4% NaOH |
|
Regenerant Mode |
Co-Flow |
|
Regenerant Level |
60 - 80 g/L |
|
Bed Depth |
800 - 1400 mm |
Recommended Products
| MR styrenic weak base anion. Hhigh operating capacity and low regenerant consumption. Excellent physical and chemical stability. Good adsorption and desorption of organics. |
For more information on our ion exchange resins, please consult our Frequently Asked Questions page.
For pricing, availability or more information please contact your Rohm and Haas representative.
