Heavy fractions
Residue from D2892, typically 370-565°C AET, without assembling a custom vacuum still.
ASTM D5236 Vacuum Pot Still Distillation Apparatus
ASTM D5236 vacuum pot still for heavy hydrocarbon mixtures. Continues the crude assay after D2892. Built in Easton, MD.
01
Who
Who this apparatus is for
Petroleum QC
Automatic vacuum control, fraction collection, AET calculation, and a permanent record of every run.
First cut: D2892
TBP work is the ASTM D2892 apparatus. Combined D2892 / D5236 platform also available.
Petroleum QC labs and crude assay labs that need boiling-range data on heavy residue after a D2892 true boiling point run.
ASTM D5236 is the vacuum pot still method for heavy hydrocarbon mixtures. It extends the crude assay into the residue range after D2892, typically into the 370-565°C AET region.
This page is the apparatus. The method text lives at ASTM International. B/R Instrument builds the pot still, vacuum, fraction collection, baths, and PC control as a turn-key system, or as a combined D2892 / D5236 platform.
02
Models
What B/R ships for D5236
Full ASTM D5236
Vacuum pot still columns from 25 mm to 70 mm. Sample range 1 to 16 liters depending on diameter.
Request InfoCombined D2892 / D5236
One platform for TBP and vacuum pot still. Automatic collection of up to 8 fractions per vacuum sequence.
Combined systemMini
Small crude samples, 50 to 1000 ml, IBP to above 500°C on a single column.
Mini crude systemsMicro
Very small charges, 3 to 100 ml, IBP to above 500°C on a single column.
Micro crude systems
03
Columns
ASTM D5236 distillation column sizes
| Diameter | Boiling Flask | Sample Range |
|---|---|---|
| 70 mm | 12-24 liters | 8-16 liters |
| 50 mm | 6-12 liters | 4-8 liters |
| 36 mm | 3-6 liters | 2-4 liters |
| 25 mm | 2-3 liters | 1-2 liters |
04
Questions
ASTM D5236 FAQ
What is ASTM D5236 vacuum pot still distillation?
ASTM D5236 is the vacuum pot still method for heavy hydrocarbon mixtures. It extends the crude assay into the residue range after D2892, typically into the 370-565°C AET region. See the D5236 pot still note.
How does D5236 differ from D2892?
ASTM D2892 is TBP with a 15-plate packed column and reflux, typically to about 400°C AET. D5236 is the vacuum pot still for heavy fractions. Labs that run both can quote the combined system.
Quotation
Request ASTM D5236 Info
Column diameter, flask size, and whether you also need D2892.