Industrial deoxygenation methods for organic solvents
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Since the reaction is sensitive to oxygen, the dissolved oxygen in the organic solvent used as a raw material must be removed. In the laboratory, distillation under reflux with metallic sodium is commonly used for this purpose. What are the oxygen removal methods used in industry for organic solvents? Could you briefly explain the operation method? Thank you!
In industry, the methods for removing oxygen from organic solvents mainly include the following: 1. Gas displacement method: Inert gases (such as nitrogen) are used to displace air from the organic solvent, thereby completing the deoxygenation process. The specific procedure involves introducing nitrogen into the reaction vessel, sealing it, and heating it to create gas convection within the solvent; thereafter, the flow rate of nitrogen is gradually increased to expel all the air. This method provides good deoxygenation effects, but it requires a large amount of nitrogen and is not very environmentally friendly. 2. Spraying method: The organic solvent is turned into a mist and sprayed into an oxygen-containing environment where it comes into full contact with oxygen; thereafter, the adsorbent absorbs the oxygen present in the organic solvent. The specific method involves installing a nozzle at the top of the reaction vessel to atomize the organic solvent, allowing it to come into contact with the adsorbent thereby achieving deoxygenation. This method uses less nitrogen and is more environmentally friendly, but its effectiveness is slightly lower than that of the gas displacement method. 3. Fixed-bed adsorption method: The adsorbent is fixed in a reaction vessel, and the organic solvent is passed through the adsorbent layer to adsorb the oxygen present in the organic solvent. The specific procedure involves evenly dispersing the adsorbent inside the reaction vessel, then adding the organic solvent to the vessel; air convection is created within the vessel to allow the organic solvent to come into contact with the adsorbent, thereby achieving oxygen removal. All three methods can be used for deoxygenation of industrial organic solvents; the specific choice needs to be determined based on actual circumstances. .
It is recommended to try the granular deoxidizer for liquid propylene used in the petrochemical industry; it is likely to be suitable.
This post was last edited by qugd on 2023-6-7 at 14:04. The original poster wants to remove oxygen; by spraying organic solvents into an environment containing oxygen and allowing them to come into full contact with oxygen, is this considered oxygen removal or oxygen addition? If this solvent is flammable and explosive, would doing this be considered an act of terrorism? If there is a spelling mistake, correct it; if you don’t understand deoxygenation, then don’t copy incorrect information randomly.
It might be possible with the spray in a nitrogen environment; theoretically it’s feasible, but the method is unclear
This post was last edited by qugd on 2023-6-8 09:32. But that guy indeed wrote about an oxygen-rich environment; I think this bastard is conducting tests on thermobaric bombs.
What makes something amazing is what you see? Spraying organic solvents (other than fire extinguishants) into an oxygen-rich environment not only fails to remove oxygen but may also lead to explosions; some organic solvents are highly flammable and explosive even in air, so what is the purpose of spraying them into an oxygen-rich environment in order to create weapons of mass destruction?
It needs to be determined based on your manufacturing process.
In industrial production, to remove dissolved oxygen that may be present in organic solvents, the following methods are commonly used: 1. Vacuum distillation: The raw material is first distilled to remove water and volatile impurities, and then distilled under vacuum to reduce the impact of oxygen on the solvent. 2. Argon gas blowing: By supplying argon gas to the solvent, dissolved oxygen is driven out of the solution, thereby avoiding the need for reducing agents; it is a safe and simple method. 3. Other reduction methods for oxygen removal: Reducants such as sodium thiosulfate (Na2S2O3) or sodium bisulfite (NaHSO3) can be used to remove oxygen from organic solvents, but they may generate harmful waste during the treatment process or cause environmental pollution; therefore, proper waste management is necessary. It should be noted that the method for removing oxygen must be selected based on the specific organic solvent and production environment. During the operation, it is necessary to pay attention to controlling factors such as temperature, reaction time, and dosage, and to strictly adhere to relevant operating procedures and safety regulations in order to ensure the safety of personnel and the quality of the product.