公开(公告)号：US4213958A

公开(公告)日：1980-07-22

申请号：US851198

申请日：1977-11-14

申请人： Gordon M. Cameron ,  Frederick W. S. Jones ,  Peter D. Nolan

发明人： Gordon M. Cameron ,  Frederick W. S. Jones ,  Peter D. Nolan

IPC分类号： C01B17/765 ,  C01B17/72 ,  C01B17/08

CPC分类号： C01B17/765

摘要： In a process for manufacturing sulphuric acid by catalytic conversion of gaseous sulphur dioxide to sulphur trioxide in the presence of dry air and under high pressure, the improvement comprising feeding the converted gas stream under high pressure to an absorbing unit, circulating essentially sulphur dioxide-free sulphuric acid through the absorbing unit to absorb the sulphur trioxide and unconverted sulphur dioxide from said converted gas stream, depressurizing the acid, simultaneously stripping the sulphur dioxide from the acid by means of air or a sulphur dioxide-free gas and removing moisture from said air or sulphur dioxide-free gas by means of said acid, cooling the resulting essentially sulphur dioxide-free acid and recirculating at least part of it to the absorbing unit. In a preferred embodiment, the process comprises the additional step of condensing part of the sulphur trioxide and unconverted sulphur dioxide constituting the converted gas stream and feeding the remainder to the absorbing unit. The condensate is partly or wholly recovered as a product or injected in the sulphuric acid streams.

摘要翻译： 在通过在干燥空气和高压下存在下将气态二氧化硫催化转化成三氧化硫的方法中，改进之处在于将转化的气流在高压下进料至吸收单元，基本上不含二氧化硫 硫酸通过吸收单元从所述转化的气流中吸收三氧化硫和未转化的二氧化硫，使酸减压，同时通过空气或无二氧化硫气体从酸中除去二氧化硫，并从所述空气中除去水分 或不含二氧化硫的气体，冷却所得到的基本上不含二氧化硫的酸，并将其至少一部分再循环到吸收单元。 在优选的实施方案中，该方法包括将部分三氧化硫和构成转化气流的未转化二氧化硫冷凝并将其余部分进料到吸收单元的附加步骤。 冷凝物作为产物部分或完全回收或注入硫酸流中。