Irreversible reaction

Neutralisation of caustic and hydrochloric acid

Direction: Irreversible
Processes: 3
Stated as: Fixed conversion, Stoichiometry only
Heat of reaction: ΔH = -55,800 kJ/kmol (2 processes)
Element balance: Checked: balances in all 3 processes

As the processes state itStoichiometry, conversions, heats of reaction and catalyst windows are taken from each process's files with their provenance. The build checks only that each process's equation balances in every element, from the process's own component formulas; it does not check the numbers. A process's design maturity applies to them.

Species

Species	Name	CAS	Role	Coefficient
NaOH	Sodium hydroxide	1310-73-2	reactant	-1
HCl	Hydrogen chloride	7647-01-0	reactant	-1
NaCl	Sodium chloride	7647-14-5	product	1
H₂O	Water	7732-18-5	product	1

In the processes

Chlor-alkali by membrane-cell electrolysis (100 kt/a Cl2, 50 wt-% caustic soda, hydrogen)Concept · not reviewed
HYDROXIDE_NEUT · Neutralisation of caustic and hydrochloric acidNaOH + HCl → NaCl + H2O
Element balance
Balances in every element
Refined glycerol (USP) from biodiesel crude glycerol (10 000 t/a, concept)Concept · not reviewed
NEUT2 · Neutralisation of the excess acid (neutraliser)HCl + NaOH → NaCl + H2O
Stated as
Fixed conversion
Phase
liquid
Element balance
Balances in every element
Conversion
100 % of HCL (assumed: D-005: caustic dosed to neutral, stoichiometric)
Heat of reaction
ΔH = -55,800 kJ/kmol at 298.15 K, as written (assumed: heat of neutralisation of a strong acid by a strong base in dilute water at 298 K (about -55.8 kJ/mol, textbook value); in the glycerol-methanol medium ASSUMED the same (D-005))
Iodine from natural iodide brine by chlorine oxidation, air blowing-out and SO2 absorption (1000 t/a)Concept · not reviewed
NEU2 · Neutralisation of the hydrochloric acid of the spent brine (R-401)HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)
Stated as
Fixed conversion
Phase
liquid
Element balance
Balances in every element
Conversion
100 % of HCl (assumed: D-009: caustic dosed to neutral)
Heat of reaction
ΔH = -55,800 kJ/kmol at 298.15 K, as written (assumed: heat of neutralisation (NBS tables, D-007))

Sources

What the processes cite for this reaction, each source once: for the reaction itself, its conversion, its heat of reaction or its catalyst. As the processes write them; DOIs, US patent numbers and web addresses are linked.

D-005: caustic dosed to neutral, stoichiometric
For the conversion · cited by Refined glycerol (USP) from biodiesel crude glycerol (10 000 t/a, concept)
heat of neutralisation of a strong acid by a strong base in dilute water at 298 K (about -55.8 kJ/mol, textbook value); in the glycerol-methanol medium ASSUMED the same (D-005)
For the heat of reaction · cited by Refined glycerol (USP) from biodiesel crude glycerol (10 000 t/a, concept)
D-009: caustic dosed to neutral
For the conversion · cited by Iodine from natural iodide brine by chlorine oxidation, air blowing-out and SO2 absorption (1000 t/a)
heat of neutralisation (NBS tables, D-007)
For the heat of reaction · cited by Iodine from natural iodide brine by chlorine oxidation, air blowing-out and SO2 absorption (1000 t/a)