Question 1

What is the difference between short path, wiped film, and molecular distillation?

Accepted Answer

Short path distillation moves vapor a short distance from a boiling flask to a nearby condenser, minimizing pressure drop and residence time, and is common for batch and R&D work. Wiped (thin) film distillation mechanically spreads a thin layer over a heated wall for brief, gentle exposure and continuous feed. Molecular distillation runs at the deepest vacuum so molecules travel almost collision-free to the condenser, enabling separation at the lowest temperatures.

Question 2

Why does cannabis distillation run under deep vacuum?

Accepted Answer

Cannabinoids boil at high temperatures at atmospheric pressure, hot enough to degrade them. Pulling a deep vacuum lowers the effective boiling point so the target fractions evaporate at much gentler temperatures, protecting potency and color. The deeper and more stable the vacuum, the lower the temperature you can distill at, which is why a strong vacuum source and tight, leak-free connections are central to good distillate quality.

Question 3

Should I choose a batch (short path) or continuous (wiped film) system?

Accepted Answer

Choose batch short-path equipment for lower volumes, single passes, R&D, and tight budgets, where simplicity and flexibility matter. Choose a wiped-film or molecular system for higher, continuous throughput, more consistent output, and shorter heat exposure on heat-sensitive material. The decision comes down to how much you process per day and whether you need continuous feed; size to realistic volume rather than the maximum the glassware implies.

Question 4

What support equipment does a distillation system need?

Accepted Answer

Distillation depends on three supporting systems: a deep vacuum source (often a multi-stage or diffusion pump with cold trapping) to reach low pressure, precise heating to control the boiling temperature, and cooling for the condensers and to protect the pump. Undersizing any of them limits how low and how stably you can distill. Plan the vacuum train, heater or bath, and chiller together with the still itself, and check utilities and footprint on each product page.

Question 5

Does material need preparation before distillation?

Accepted Answer

Generally yes. Distillate is usually made from crude that has already been winterized to remove waxes and lipids and decarboxylated to convert acidic cannabinoids, and many workflows degas or do a first pass to strip residual solvent and light volatiles before the main run. Feeding clean, prepared material improves separation, clarity, and yield. Follow your established process; the still refines prepared input rather than replacing upstream steps.

Question 6

How many passes are needed to reach a clear distillate?

Accepted Answer

It depends on the feed quality and the separation you need. Many operations run a first pass to remove residual solvent and lights, then a main pass to isolate the target cannabinoid fraction, and sometimes an additional pass for color or purity. Better-prepared crude and tighter vacuum can reduce the number of passes. Treat pass count as a function of your input and target spec rather than a fixed rule, and validate against your own results.

Extraction

Temperature Control

Processing

Separation

Drying

Support Equipment

Distillation Equipment

2L Short Path Distillation Kit — Borosilicate Glass

Customized Glass Fractional Distillation Column Unit

Frequently asked questions

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