By Navin G. Ashar
This ebook provides an entire, in-depth research for at the influence of liquid sulfur dioxide and liquid sulfur trioxide to hold out complicated and hard sulfonations, in addition to manufacture of sulfuric acid with a CAPEX requirement of under part, a space requirement under one-third, and no emission of sulfur dioxide. The strategies defined during this quantity represents an cutting edge strategy appropriate to the present production procedures of sulfuric acid, sulfamic acid, para toluene sulfonic acid and different sulfonated product.
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Extra info for Advances in Sulphonation Techniques: Liquid Sulphur Dioxide as a Solvent of Sulphur Trioxide
7 Effluent Expected 2 MT (aqueous acidic). 54 8 Impact on the Future Processes for the Manufacture of Chemicals Fig. 8 Alternate Process (Proposed) The innovative process using liquid SO2 and liquid SO3 avoids elaborate chain of glasslined reactors with thermic fluid heating and vacuum distillation batch systems in Fig. 2. 9 −72 111 45 −10 Advantages of the new process 1. 2. 3. 4. Continous reaction hence small capital investment as well as power requirement. Low temperature reaction hence better conversion and better quality.
In addition to the exothermic heat generated in the Oleum Tower, there is a sizeable sensible heat from the plant gases transferred to the Oleum since the equilibrium demands the operation of the Oleum Tower in the range of 50–60 °C. S. pipes. However, the compact Plate-type Heat Exchangers now available are widely used by the industry. Since the absorption of SO3 in the Oleum requires very close control of temperature, it is important that the cooling of Oleum is done by cooling water supplied from a dedicated Cooling Tower for the 25 % oleum section.
9 Manufacture The manufacture of liquid or gaseous SO3 is carried out by boiling of 25–32 % Oleum as in the case of manufacturing 65 % Oleum. The sulphur trioxide can be liqueﬁed by condensing at 43–45 °C. Care should be taken to prevent any moisture ingress in the plant as it may cause serious operating problems. The liqueﬁed SO3 is then taken to a product storage tank from which tankers are ﬁlled using Intermediate Lorry Filing Tanks. 10 Economic Considerations For any Sulphuric Acid plant, the production of liquid SO3 is more proﬁtable and hence the objective is to maximise the production of SO3.