Irreversible reaction

Haloform bromination of acetone to carbon tetrabromide (lumped)

C₃H₆O+4NaBrOgivesCBr₄+C₂H₃NaO₂+3NaOH

Direction: Irreversible
Processes: 1
Stated as: Rate law
Heat of reaction: ΔH = -520,800 kJ/kmol (one process)
Element balance: Checked: balances

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
C₃H₆O	Acetone	67-64-1	reactant	-1
NaBrO	Sodium hypobromite	13824-96-9	reactant	-4
CBr₄	Carbon tetrabromide	558-13-4	product	1
C₂H₃NaO₂	Sodium acetate	127-09-3	product	1
NaOH	Sodium hydroxide	1310-73-2	product	3

In the processes

Carbon tetrabromide by semi-batch haloform bromination of acetone in aqueous hypobromite (314 t/a)Concept · not reviewed
HALO · Haloform bromination of acetone to carbon tetrabromide (lumped)C3H6O + 4 NaBrO → CBr4 + C2H3NaO2 + 3 NaOH
Stated as
Rate law
Phase
liquid
Element balance
Balances in every element
Heat of reaction
ΔH = -520,800 kJ/kmol at 298.15 K, as written (assumed: ASSUMED Hess's-law estimate (D-005): C3H6O(l) + 4 BrO-(aq) -> CBr4(s) + CH3COO-(aq) + 3 OH-(aq), with acetone(l) -249.4 and CBr4(s) +29.4 kJ/mol (NIST WebBook, read 2026-11-05), OH- -230 (Wikipedia table, read), BrO- -94.1 and CH3COO- -486.0 kJ/mol (NBS tables, Wagman et al. 1982, not re-read); per mol of acetone, to the solid (the crystallisation's heat included))
Rate law
basis: volume; driving: concentration; form: power_law; k: {"A":"3.703e8","Ea":60000}; orders: {"ACET":1,"NAOBR":1}; temperature range: 273.15 – 313.15 (assumed: ASSUMED effective rate of the lumped haloform steps with the phase-transfer catalyst (D-005), chosen so that the post-reaction after the dosing takes a few hours, as the patent's 3-5 h of stirring; no open kinetics found (2026-11-05); to be replaced by reaction calorimetry)

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.

CN 101 885 665 A, claim 1 step 2 and the examples: acetone dripped into the hypobromite at 0-5 C with tetrabutylammonium bromide, a white solid precipitating, then 3-5 h of stirring
For the reaction · cited by Carbon tetrabromide by semi-batch haloform bromination of acetone in aqueous hypobromite (314 t/a)
ASSUMED Hess's-law estimate (D-005): C3H6O(l) + 4 BrO-(aq) -> CBr4(s) + CH3COO-(aq) + 3 OH-(aq), with acetone(l) -249.4 and CBr4(s) +29.4 kJ/mol (NIST WebBook, read 2026-11-05), OH- -230 (Wikipedia table, read), BrO- -94.1 and CH3COO- -486.0 kJ/mol (NBS tables, Wagman et al. 1982, not re-read); per mol of acetone, to the solid (the crystallisation's heat included)
For the heat of reaction · cited by Carbon tetrabromide by semi-batch haloform bromination of acetone in aqueous hypobromite (314 t/a)