ES290073A1 - Procedure for the absorption of formaldehyde from a gas containing formaldehyde (Machine-translation by Google Translate, not legally binding)
- Google Patents
Procedure for the absorption of formaldehyde from a gas containing formaldehyde (Machine-translation by Google Translate, not legally binding)
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Stamicarbon BV
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Stamicarbon BV
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Priority to ES0290073ApriorityCriticalpatent/ES290073A1/en
Publication of ES290073A1publicationCriticalpatent/ES290073A1/en
Procedure for the formaldehyde absorption of a gas containing formaldehyde, under the formation of a concentrated solution containing formaldehyde and melamine, in an absorption system of more than one phase, characterized in that in a first phase the gas is put in contact with a circulating absorption solution containing, in addition to 25-55% by weight of water, 15-25 mol of formaldehyde per mole of melamine, under continuous evacuation of part of this circulating solution as a product to be obtained, in an amount such that unit of time the evacuated product contains an amount of formaldehyde that equals the quantity supplied with gaseous formaldehyde, then absorbed in a final adsorption phase, its countercurrent to continuously supplied water, formaldehyde that has not been absorbed in the first phase, after which it is added to the resulting diluted formaldehyde solution, as much melamine per unit of time as it is evacuated. The end of the first phase of absorption in the form of product obtained, then supplying the obtained mixture of formaldehyde, melamine and water as a supplement to the absorption liquid circulating through the first absorption phase. (Machine-translation by Google Translate, not legally binding)
ES0290073A1963-07-161963-07-16Procedure for the absorption of formaldehyde from a gas containing formaldehyde (Machine-translation by Google Translate, not legally binding)
ExpiredES290073A1
(en)
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