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Thermophysical Data for Process Design
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DDB#	Name	CAS-RN	Formula
72	N,N-Dimethylformamide (DMF)	68-12-2	C₃H₇NO	Overview	Details
91	Heptane	142-82-5	C₇H₁₆	Overview	Details
283	Thiophene	110-02-1	C₄H₄S	Overview	Details
542	Sulfolane	126-33-0	C₄H₈O₂S	Overview	Details
3264	Tetra-n-butylammonium bromide	1643-19-2	C₁₆H₃₆BrN	Overview	Details

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Mixture Data

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**Vapor-Liquid Equilibria (VLE)**
DDB#	Name	91	283	542	3264	Tetra-n-butylammonium bromide
72	N,N-Dimethylformamide (DMF)	11	5	n.a.	n.a.
91	Heptane		3	3	n.a.
283	Thiophene			2	n.a.
542	Sulfolane				n.a.

**Heats of Mixing (HE)**
DDB#	Name	91	283	542	3264	Tetra-n-butylammonium bromide
72	N,N-Dimethylformamide (DMF)	9	n.a.	4	n.a.
91	Heptane		1	n.a.	n.a.
283	Thiophene			1	n.a.
542	Sulfolane				n.a.

**Activity Coefficients at Infinite Dilution (Pure Solvents) (ACT)**
DDB#	Name	91	283	542	3264	Tetra-n-butylammonium bromide
72	N,N-Dimethylformamide (DMF)	40	2	n.a.	n.a.
91	Heptane		1	59	n.a.
283	Thiophene			10	n.a.
542	Sulfolane				n.a.

**Liquid-Liquid Equilibria (Miscibility Gaps) (LLE)**
DDB#	Name	91	283	542	3264	Tetra-n-butylammonium bromide
72	N,N-Dimethylformamide (DMF)	13	n.a.	n.a.	n.a.
91	Heptane		1	16	n.a.
283	Thiophene			n.a.	n.a.
542	Sulfolane				n.a.

**Heat Capacities of Mixtures, Excess Heat Capacities (CPE)**
DDB#	Name	91	283	542	3264	Tetra-n-butylammonium bromide
72	N,N-Dimethylformamide (DMF)	n.a.	n.a.	n.a.	1
91	Heptane		n.a.	n.a.	n.a.
283	Thiophene			n.a.	n.a.
542	Sulfolane				n.a.

**(A)zeotropic Data (AZD)**
DDB#	Name	91	283	542	3264	Tetra-n-butylammonium bromide
72	N,N-Dimethylformamide (DMF)	14	5	3	n.a.
91	Heptane		3	4	n.a.
283	Thiophene			2	n.a.
542	Sulfolane				n.a.

**Solid-Liquid Equilibria (SLE)**
DDB#	Name	91	283	542	3264	Tetra-n-butylammonium bromide
72	N,N-Dimethylformamide (DMF)	n.a.	n.a.	n.a.	n.a.
91	Heptane		3	1	n.a.
283	Thiophene			2	n.a.
542	Sulfolane				n.a.

**Densities and Volumes of Mixtures, Excess Volumes (VE)**
DDB#	Name	91	283	542	3264	Tetra-n-butylammonium bromide
72	N,N-Dimethylformamide (DMF)	5	n.a.	n.a.	4
91	Heptane		5	n.a.	n.a.
283	Thiophene			n.a.	n.a.
542	Sulfolane				n.a.

**Critical Data of Mixtures (CRI)**
DDB#	Name	91	283	542	3264	Tetra-n-butylammonium bromide
72	N,N-Dimethylformamide (DMF)	1	n.a.	n.a.	n.a.
91	Heptane		n.a.	n.a.	n.a.
283	Thiophene			n.a.	n.a.
542	Sulfolane				n.a.

**Mixture Viscosities (VIS)**
DDB#	Name	91	283	542	3264	Tetra-n-butylammonium bromide
72	N,N-Dimethylformamide (DMF)	4	n.a.	n.a.	n.a.
91	Heptane		n.a.	n.a.	n.a.
283	Thiophene			n.a.	n.a.
542	Sulfolane				n.a.

**Mixture Surface Tensions (MSFT)**
DDB#	Name	91	283	542	3264	Tetra-n-butylammonium bromide
72	N,N-Dimethylformamide (DMF)	1	n.a.	n.a.	n.a.
91	Heptane		n.a.	n.a.	n.a.
283	Thiophene			n.a.	n.a.
542	Sulfolane				n.a.

**Electrical Conductivities (ECND)**
DDB#	Name	91	283	542	3264	Tetra-n-butylammonium bromide
72	N,N-Dimethylformamide (DMF)	n.a.	n.a.	n.a.	6
91	Heptane		n.a.	n.a.	n.a.
283	Thiophene			n.a.	n.a.
542	Sulfolane				n.a.

**Further Thermodynamic Properties (X)**
DDB#	Name	91	283	542	3264	Tetra-n-butylammonium bromide
72	N,N-Dimethylformamide (DMF)	3	n.a.	n.a.	5
91	Heptane		n.a.	n.a.	n.a.
283	Thiophene			n.a.	n.a.
542	Sulfolane				2

**Total**
DDB#	Name	91	283	542	3264	Tetra-n-butylammonium bromide
72	N,N-Dimethylformamide (DMF)	101	12	7	16
91	Heptane		17	83	n.a.
283	Thiophene			17	n.a.
542	Sulfolane				2

Dortmund Data Bank Version: February 2024

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