Question 1

What is a hydrothermal synthesis autoclave used for?

Accepted Answer

A hydrothermal autoclave heats an aqueous or solvent mixture in a sealed PTFE-lined vessel so the self-generated pressure and elevated temperature drive reactions that will not occur in open glassware. It is widely used to grow single crystals, synthesize nanoparticles, zeolites, and battery cathode materials, and to digest difficult samples for analysis. The sealed Teflon chamber also resists aggressive acids and minimizes contamination of the product.

Question 2

What is the difference between SS304 and SS316L reactor bodies?

Accepted Answer

Both are stainless steels used for the pressure-bearing shell of the reactor. SS304 is the general-purpose choice and handles most lab autoclave duty. SS316L adds molybdenum and has lower carbon, giving better resistance to pitting, chlorides, and corrosive environments, which matters when working with halide-containing or more aggressive media. The inner liner contacts your chemistry, but a more resistant body adds margin and longevity for demanding work.

Question 3

What temperature and pressure can a PTFE-lined reactor handle?

Accepted Answer

PTFE (Teflon) liners are valued for broad chemical resistance but are temperature-limited, typically with a safe operating range around 200C and a short-term maximum somewhat above that; exceeding it deforms the liner. Standard lab autoclaves are commonly rated near 3 MPa. Exact temperature and pressure limits vary by model and vessel size, so always work within the specific ratings printed for your unit rather than a generic figure.

Question 4

How full should I fill a hydrothermal autoclave?

Accepted Answer

Stay within the manufacturer's specified fill ratio, commonly well under the liner's full volume, because the empty headspace absorbs the pressure rise as the contents heat and expand. Overfilling removes that safety margin and can cause dangerous overpressure or liner failure. Treat the rated fill volume as a hard limit, not a target, and account for any expected gas generation from your reaction when deciding how much to charge.

Question 5

What is the difference between a PTFE and a PPL liner?

Accepted Answer

Both liners isolate your chemistry from the steel vessel and resist acids. PTFE (Teflon) is the standard choice with excellent broad chemical resistance but a lower temperature ceiling, around 200C safe operation. PPL (polyphenylene) liners tolerate higher temperatures, often into the 260-280C range, making them suitable when a synthesis needs more heat than PTFE allows. Choose based on your required reaction temperature and the reagents involved.

Question 6

What safety precautions matter when running a high-pressure reactor?

Accepted Answer

Treat every sealed run as a pressurized vessel. Stay within rated temperature, pressure, and fill volume, inspect the liner and sealing surfaces for wear or cracking before each use, and confirm the closure is properly tightened. Heat and cool gradually, and never open the autoclave until it has cooled to a safe temperature and pressure has fully dissipated. Account for any gas-generating reactions when assessing the pressure your run will reach.

Extraction

Temperature Control

Processing

Separation

Drying

Support Equipment

Reactors (High Pressure)

250 mL Hastelloy High-Pressure Reactor with Electric Stirring

500ml High Pressure Stirring Reactor Autoclave — 22MPa SS316L

Frequently asked questions

5L High Pressure Reactor — 5MPa, 200°C, SS316, Hastelloy C-22

FCF-5 5L High Pressure Stirred Autoclave Reactor — 22MPa, 350°C

HNZXIB CJF Series High Pressure Stirred Autoclave — 1L

MTST 2L High Pressure Reactor — 350°C / 22 MPa

MTST 500ml High Pressure Reactor — Hastelloy, 22MPa

MTST CF-0.025/2 High Pressure Reactor — 25ml SS304

MTST CF-0.1L High Pressure Autoclave Reactor — SS304, 22MPa

MTST CF-0.25L High Pressure Reactor — 250 mL, 22 MPa

MTST CF-0.5L High Pressure Reactor — 500ml, 22MPa

MTST CF-1L High Pressure Autoclave Reactor — 1L, 22MPa

MTST CF-3L Stainless Steel High Pressure Autoclave Reactor — 3L

MTST CJF 2L High Pressure Reactor — PTFE Lined, 22 MPa

MTST CJF-0.1 High Pressure Reactor — 0.1L, 22MPa, 350°C

MTST FCF-1 High Pressure Stirred Reactor — 1L, 22 MPa

MTST FCF-2 High Pressure Stirred Reactor — 2L, 22 MPa

MTST FCF-20 High-Pressure Reactor Autoclave — 20L, 22 MPa, 350°C

MTST High Pressure Reactor — 100ml, 22 MPa, 220°C

MTST High Pressure Reactor — 250ml Hastelloy, 22MPa

MTST HK-200 Hydrothermal Synthesis Autoclave — 25ml

MTST KD-HP-T High Pressure Stirring Reactor — 50-5000ml

MTST KD-HP-U Ultrasonic High Pressure Reactor — 50-2000mL

MTST KD-HPM-1 High Pressure Stirring Reactor — 10–5000 mL