摘要:
A process for the removal of chlorine from a gaseous mixture comprising chlorine gas and carbon dioxide gas, which comprises feeding an aqueous solution or suspension containing an alkali metal sulfite and/or an alkaline earth metal sulfite and optionally an alkali metal hydroxide and/or an alkaline earth metal hydroxide in a proportion not greater than twice in molar ratio the alkali metal sulfite and/or alkaline earth metal sulfite, and washing the gaseous mixture with the solution or suspension while controlling the pH of the solution or suspension within a range of 1.9-6.3, whereby chlorine is solely removed from the gaseous mixture.
摘要:
Aus Erdgas, das neben Methanol auch Kohlenwasserstoffe mit 2 bis 4 C-Atomen pro Molekül und H₂S enthält, werden das H₂S und die Kohlenwasserstoffe teilweise entfernt. Das Erdgas mit einem Druck von mindestens 5 bar wird in einer Wärmeaustauschzone indirekt auf Temperaturen von -30 bis -100°C gekühlt. Aus dem gekühlten Erdgas trennt man Kondensat ab, entspannt das Kondensat und leitet es als Kühlmittel durch die Wärmeaustauschzone (2). Waschflüssigkeit wird in der Wärmeaustauschzone (2) auf Temperaturen von -30 bis -80°C gekühlt und in einer Waschzone (8) mit dem von Kondensat befreiten Erdgas zusammengeführt. Die aus der Waschzone (8) abgezogene, beladene Waschflüssigkeit leitet man durch die Wärmeaustauschzone (2). Das in der Waschzone gereinigte Erdgas wird entspannt und ebenfalls durch die Wärmeaustauschzone (2) geleitet.
摘要:
A gaseous mixture (531) containing chlorine, carbon dioxide and non-condensable gas is compressed (501) and cooled (502) to separate it (504) into a residual gas formed principally of a major portion of the non-condensable gas and a condensate formed primarily of chlorine. The condensate is fed to a stripping column (505) to desorb carbon dioxide and a minor portion of the non-condensable gas dissolved in the condensate. The stripped gas formed primarily of chlorine and carbon dioxide may be treated further. Namely, the stripped gas is mixed with the residual gas. At least a portion of the mixed gas is fed into an absorption column (512), whereby a major portion of remaining chlorine is absorbed to lower the chlorine content. Removal of chlorine from such a gaseous mixture or an off-gas from the above process can be achieved by washing it (525) with an aqueous solution or suspension containing an alkali metal sulfite and/or an alkaline earth metal sulfite while controlling the pH of the solution or suspension within a range of 1.9-6.3.
摘要:
A process for cooling gaseous chlorine in which gaseous chlorine at elevated temperature and at a pressure of greater than 0.5 bar gauge, for example, up to 12 bar gauge, is cooled by directly contacting the gaseous chlorine with an aqueous solution of a solute, for example, with an aqueous alkali metal chloride solution from which chlorine may be produced by electrolysis.
摘要:
A gaseous mixture (531) containing chlorine, carbon dioxide and non-condensable gas is compressed (501) and cooled (502) to separate it (504) into a residual gas formed principally of a major portion of the non-condensable gas and a condensate formed primarily of chlorine. The condensate is fed to a stripping column (505) to desorb carbon dioxide and a minor portion of the non-condensable gas dissolved in the condensate. The stripped gas formed primarily of chlorine and carbon dioxide may be treated further. Namely, the stripped gas is mixed with the residual gas. At least a portion of the mixed gas is fed into an absorption column (512), whereby a major portion of remaining chlorine is absorbed to lower the chlorine content. Removal of chlorine from such a gaseous mixture or an off-gas from the above process can be achieved by washing it (525) with an aqueous solution or suspension containing an alkali metal sulfite and/or an alkaline earth metal sulfite while controlling the pH of the solution or suspension within a range of 1.9-6.3.
摘要:
Selon l'invention, le procédé pour mélanger un gaz avec au moins un liquide, notamment pour obtenir un solvant non chloré ou peu chloré à partir d'un hydrofluoroalcane gazeux, est caractérisé en ce qu'il consiste, à partir des conditions normales de température et de pression, à refroidir le gaz dans des conditions de température et de pression telles que ce gaz se liquéfie, à mélanger ce gaz liquéfié avec ledit liquide, et à ramener le mélange à la température normale.
摘要:
A process for the removal of chlorine from a gaseous mixture comprising chlorine gas and carbon dioxide gas, which comprises feeding an aqueous solution or suspension containing an alkali metal sulfite and/or an alkaline earth metal sulfite and optionally an alkali metal hydroxide and/or an alkaline earth metal hydroxide in a proportion not greater than twice in molar ratio the alkali metal sulfite and/or alkaline earth metal sulfite, and washing the gaseous mixture with the solution or suspension while controlling the pH of the solution or suspension within a range of 1.9-6.3, whereby chlorine is solely removed from the gaseous mixture.