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Thiocyanate ions can be removed from sodium carbonate/bicarbonate solution that is used for oxidative scrubbing of H2S using a moderately basic anion exchange resin (see US 4,999,113). The flow rate of the scrubbing solution is 40 m3 /h and the initial concentration of thiocyanate is 10 g/l. A polystyrene-based anion exchange resin suitable for this duty has capacity of 1.8 eq/L. The resin can be regenerated by flushing 1.5 equivalents of 4.0 wt% NaOH, preceded by the same volume of water. Two beds are used, with one in operation and one in regeneration. If the bed is designed to be 80% loaded at the end of a 2 hour operation cycle, estimate the bed volume. Also determine the flow rate of sodium hydroxide required during the regeneration.
The recovery of each main component in each product is to be 98%. For example, 98% of the propane in the feed stream is to appear in the propane-rich product, and 98% of the combined pentanes in the feed stream is to appear in the bottoms product ..
thermometry is the science of temperature measurement.nbsp for a thermometer to work we infer the temperature from the
Use molecular orbital theory to predict whether the bond order in the superoxide ion, O2-, should be higher or lower than the bond order in neutral O2 molecule.Is the bond order of O2- higer or lower than that of O2?
Natural gas composed of 60. mol% methane, 30. mol% ethane, and 10. mol% propane at 25 °C and 500. psia is fed at a rate of 50. m3/hr into a boiler. In the boiler it is blended with enough air to provide 20% excess oxygen and combusted.
If the feed contains 0.2% argon (from the nitrogen separation process), calculate the purge rate required to hold the argon in the recycle stream below 5.0%. Percentages are by volume.
Why is it important - where does galvanising fit into possible corrosion protection strategies?)
Suppose that R2 is decreased to 0.5 min/ft2. Compare the old and new values of the ultimate gain and the critical frequency. Would you expect the control system performance to become better or worse, justify your answer.
A beaker filled with an equimolar liquid mixture of ethyl alcohol and ethyl acetate evaporates at O°C into still air at 101 kPa (1 atm) total pressure. Assuming Raoult's law applies, what will be the composition of the liquid remaining when half t..
A plating waste with a flow of 50 L/min contains 274 mg/L of NaCN. Determine the amounts of chlorine as Ca(OCl)2 and NaOH required to: (a) Oxidize the cyanide to cyanide; and (b) Oxidize the cyanide to CO2 and H2O.
A process to produce 1000 kgmol/h acetaldehyde, ethane is fed to the reactor at 1500 kgmol/h and the fractional conversion is 0.8. The product stream contains 2 mol% CO2. Calculate the molar composition of the product stream and the fractional select..
The reflux ratio is set at 4.0:1. Calculate the kg mol/h distillate D and bottoms W and their compositions. Also, calculate the number of theoretical plates required.
acetyl chloride is a colorless fuming liquid used primarily in the chemical industry.a how is acetyl chloride produced?
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