I was researching into Codes and Guidelines for Blast Protection of Reactors (Hydrogenation). A non-US facility I was reviewing has a number of hydrogenators (approx 10,000 to 15,000 L) and there are no locally applicable codes that cover this use case.
The end-use is specialty chemicals so...
I've a couple of questions re. venting of hydrogen from a 6000 L batch reactor at the end of a batch.
I was doing a safety review and this is a specialty chemical facility and there's no flare just a vent stack. The amount of residual hydrogen is about 20% of the reactor volume and at low...
We are exploring the option of Nitrogen padding of drums (200 L) / totes (1000 L) before shipping for avoiding liquid product oxidation. Any guidelines on how this is done and what typical over-pressure to use etc?
Any systems that are sold to do this?
When I researched I find a lot of...
I need to heat a process gas (@ 10 bar) to approx 1200 C for a short residence time for a chemical conversion in a pilot plant. The geometry I am considering is a 6" to 8" dia coil bundle (approx 20 turns ) made of Inconel / Hastealloy tube approx. 0.5" dia with a gas flame at the center...
We have a 2 Litre Lab reactor we wanted to convert to a CSTR trial. The reaction involved is Liquid Liquid and takes place at approx 130 C with 6 bars autogenous pressure. The reactor has in internal coil and a Rushton type stirrer magnetically coupled.
Two liquids are co-dosed by dosing...
If the specifications on a certain lower boiling impurity in the product is only 0.5 ppm is it feasible to reach such tight specs using distillation as a separation procedure?
Or is distillation typically not the right seperation-operation choice for achieving such tight ppm level specs in...
I was trying to size a column for vacuum distillation (10 mmHg) that uses Sulzer CY type packings. I'm using Sulocol, the vendor's sizing program and one aspect confuses me:
For my column size the flood percent is quite low (40%) yet the pressure drop per unit meter (3.04 mbar/m) seems to be...
The old glass lined reactor we have says in its specifications that it has a tantalum plug in its top dish. This is not a plug added for repairs later but something that was provided at design.
Now I am ordering a new reactor but the vendor has not provided for a tantalum plug in the top head...
I'm planning a lab / pilot plant to test a flow reactor which has two immiscible liquids reacting. To keep them well mixed a static mixer is one option.
What I cannot seem to figure out is whether there's a certain minimum flow rate (I suppose there must be) for the mixer to be effective. Any...
I'm reading an example from Coulson's Chem. Eng. Series on Design (by Sinnot) and one calculation there about a stiffening ring to reinforce a vacuum column against buckling that confuses me.
I post the example below. He seems to confuse the terms "breadth" vs "depth" in his formula & I'm...
I have a SS304 distillation column that's supposed to operate under a full vacuum and is fabricated in flanged sections 1600 mm dia each 3500 mm in length and 6 mm wall thickness.
The sections are flanged to each other by bolted flanges 1800 mm dia and 40 mm thick.
My question is, can I take...
I've seen some Glass Lined Reactors where the agitator shaft & blades are all fabricated from what seems to be heavy steel pipes (they avoid sharp turning radii where the glass coating will crack). Which are finally coated with the protective glass & baked etc.
My question is about the...
In conventional industrial waste water treayment setups I've seen Reverse Osmosis (RO) units being fed water from Biological treatment systems to reduce the very last bits of dissolved solids. Say, to bring down TDS from 1000 ppm to 50 ppm.
My question is, do RO systems work at reducing...
I am using a Rosemont vortex flowmeter (8800 series)and that comes with a K-factor stamped on a nameplate.
Now, obviously, a vortex type meter is not a true mass flow sensor (e.g. a Corolois) but a volumetric flow meter. Now my question is suppose the original fluid changes from A to B (both...
In Ludwig's Handbook I found a correlation for air agitation intensity using gas sparging that is based on "superficial gas velocity". See image below; Thumb Rule #5.
I am confused about the correct area basis to use when calculating a superficial gas velocity in a tank: Would this be based on...
In order to agitate a 10 m3 cylindrical tank (approx. 1900 mm dia & 4000 mm tall) using bubbled compressed air (5 barg) what would be an estimate of the flowrate (scfm) of air needed?
My estimate is 0.45 scfm (0.012 m3/min) based on a correlation I found in Perry's Handbook. Does this rate...
What are good choices for a valve type for use on a 3" line that introduces a solid+liquid slurry into a reactor. But afterwards the valve must be able to shut off tight against a pressure of approx. 10 barg within the reactor.
Max Temperature is 100 C but the reactor headspace has Hydrogen...
When designing a continuous distillation column is there a design procedure / rule of thumb to select how much of a liquid level one must keep at the column bottom?
This is a vacuum column (10 mmHg abs), in the petrochemicals industry with a forced circulation reboiler. The column has...
I was just estimating the approximate weights of a vacuum distillation column (for a initial analysis & not a final design). The column is expected to be 1200 mm OD / 8 mm thick / 4000 mm long.
If I look up the Class 150 flange size (slip on) I get 1511 mm OD-flange / 108 mm thk with 44 bolt...
I am planning a pilot scale reaction that is carried out in a large excess of H2O at 150 C in a single CSTR. Obviously, that CSTR operates under substantial autogenous pressure. A limpet coil provides the heat.
The part that confuses me is the mechanical design on the outlet side. Obviously, I...
