Patent GB-377376-A (GB)
Title: A process and device for continuously producing gases
IPC: C01B11/02
Filed: 1931-06-12
Abstract: <PICT:0377376/III/1> Gases, especially chlorine dioxide, are generated by a process in which the liquid or solid with liquid reaction components are introduced into a reaction vessel, are passed therefrom into a degasefying still situated at a higher level, being there subjected to vacuum to liberate the gas produced, and return through one or more sedimenting vessels to the reaction vessel, a circulation of the reaction mixture being maintained, for example by introducing air into the conduit leading from the reaction vessel to the degasefying still.  In an example potassium chlorate is introduced into a reaction vessel 1 which is provided with a sieve 5, through a dosing apparatus 8, fresh sulphuric acid being supplied through a funnel 9.  The reaction products pass through a conduit 6 to a degasing still 2 owing to the action of air introduced through a tube 7.  Chlorine dioxide is liberated in the still 2 owing to the vacuum produced by a pump 19 and passes away through a cooler 17 and safety vessel 18.  The reaction liquid returns through a tube 14, a sedimenting vessel 3, and an overflow 15 to the reaction vessel 1. The reaction vessel is not hermetically sealed and is connected to the still by means of a ring 11 and a tube 10, thereby air enters the reaction vessel serves to dilute any chlorine dioxide generated in the reaction vessel and to remove it to the still.  Alternatively, this chlorine dioxide may be removed through a tube directly connecting the reaction vessel to the pump, a filter preferably being interposed.  The conduit 10 may also be fed with formaldehyde vapour to accelerate the decomposition of the liquid in the still. The still 2 is provided with a spray filter 13.  According to modifications several degasing stills and several sedimenting vessels may be provided.  Mixtures of chlorates with indifferent inorganic substances such as described in Specification 345,190 may be employed.ALSO:<PICT:0377376/IV/1> Gases, especially chlorine dioxide, are generated by a process in which the liquid or solid and liquid reaction components are introduced into a reaction vessel, are passed therefrom into a degasifying still situated at a higher level, being there subjected to vacuum to liberate the gas produced, and return through one or more sedimenting vessels to the reaction vessel, a circulation of the reaction mixture being maintained, for example by introducing air into the conduit leading from the reaction vessel to the degasifying still.  In an example potassium chlorate is introduced into a reaction vessel 1 which is provided with a sieve 5, through a dosing apparatus 8, fresh sulphuric acid being supplied through a funnel 9.  The reaction products pass through a conduit 6 to a degasifying still 2 owing to the action of air introduced through a tube 7.  Chlorine dioxide is liberated in the still 2 owing to the vacuum produced by a pump 19 and passes away through a cooler 17 and safety vessel 18.  The reaction liquid returns through a tube 14, a sedimentary vessel 3 and an overflow 15 to the reaction vessel 1.  The reaction vessel is not hermetically sealed and is connected to the still by means of a ring and a tube 10, whereby air entering the reaction vessel dilutes any chlorine dioxide generated in the reaction vessel and removes it to the still.  Alternatively, this chlorine dioxide may be removed through a tube directly connecting the reaction vessel to the pump, a filter preferably being interposed.  The conduit 10 may also be fed with formaldehyde vapour to accelerate the decomposition of the liquid in the still.  The still 2 is provided with a spray filter 13.  According to modifications several degasifying stills and several sedimentary vessels may be provided.