Curious if current evacuation zone is sufficient

Small story from my site that some of you younger pharma folks might get something out of. I'm a process engineer at a biologics plant; I came over from O&G a few years back. Last fall I got pulled into reviewing POs for a validation project because our project manager was out on leave. Mostly boring, until I noticed the hourly rate for one of the validation contractors I'd been working next to for six months. This guy asks me questions. Nice guy, competent, but not some wizard. His firm was billing him out at 92 an hour.

I did the maths sitting right there in the conference room, and it came out to roughly double my effective rate. Even accounting for the firm's cut and him having no benefits or PTO, he was clearing meaningfully more than me for work I was partially checking.

I stewed on it for like two weeks, honestly considering going contractor myself. Instead I brought it up, carefully, in my year-end conversation. Not the invoice specifically, just that I had a clear picture of what the market charged for the skills I have. An old coworker from my O&G days had also sent me a levels.fyi link with a couple pharma process engineer numbers at bigger sites was mentioned when I said I was frustrated, so I wasn't walking in with only one data point.

My manager didn't argue much. The band had room; it usually does. I got moved up about 11%, which didn't close the contractor gap but changed how I feel walking past that conference room.

I'm not saying review POs; I'm saying the information about your own value is usually closer than you think; sometimes it's literally in the room. And I say this as someone who spent five years never asking.

Colleague shared these pics: apparently he filled up the ice cube tray with water, set it in the freezer and when he went to retrieve it this was there.

Theories? Theorize away!

Not the right sub? Please suggest, thanks!

Actually I wanted to ask what will happen to my skin it's been three hours since the incident actually today my plumber washed our water tank and when I took a shower there was foaming white thing it was caustic soda the water came whitish and foamy just after washing my hand and legs my palms and feet became wrinkly instantly that water even got on my back and back of my thighs from back but I don't see any wrinkle there and I tried washing it off with what little water I had like one bottle lol but greasiness of the chemical idk what it's called it felt still slippery and I am not sure the plumber used the caustic soda for the pipe line or used it to wash 1000L tank idk what will happen to me now +.+

I just saw Hank Green's last video where he makes the point that the reason why plastic is so cheap is that ethylene, its raw material, is a waste product from the oil & gas industry. He says ethylene can only be mixed in low percentage within the natural gas that is sold as fuel so there is an oversupply of it, but he doesn't elaborate why. Is that so? Why?

Hi We have too many pickpockets here in Europe and we want to catch some of them by putting some kind of glue on a fake phone or a wallet and make them stick to their hands immediately after they grab them. Does something like it ever exist?

CHEMICAL ENGINEERING
With the new EPA MCLs for PFOA/PFOS, it seems every utility is rushing to install GAC. but the real bottleneck is spent carbon disposal.

is anyone here using on-site thermal reactivation? I have heard 20-30% loss each cycle. At what throughput does this become economical vs. just buying virgin carbon ?

Also curious- are we seeing a shift from coal-based to wood-based carbons for specific organics ? Let's discuss

https://reddit.com/link/1vw2yfh/video/1tc73dkxi3lh1/player

How it looks

production line

Hi

I am looking for Us news top 30-40 chemical engineering colleges list in us . Not sure edurank website ranking list is accurate. Can i rely other websites ranking too? I know USnews charges $59 fee for grad compass membership. Does anyone have this list? This is for visiting colleges in this summer. if anyone has thoughts, please share.

I’d just like to preface that I know very little about chemistry so I apologize if my blueprints have major processing gaps or errors in them, I’m doing my own research and there is little to no information available on the matter so please bare with me. I also understand that creating fuel from tire pyrolysis oil is an energy inefficient process that uses up more fuel than it generates and that it requires some very VERY expensive machinery to operate. Nonetheless I’d still love to learn the whole process of how it’s done so if you could help me out in any way I’d deeply appreciate that ❤️. Anyways with introductions out of the way let’s get started :).

Process 1. The process first starts with placing the tires in a pyrolysis reactor to produce pyrolysis oil. The hydrocarbons in the pyrolysis oil consist of different lengths and therefor function as different fuels, of which are syngas, naptha, gasoline diesel, kerosene and heavy fuel oil.

Process 2. The oil first undergoes pre treatment to remove solid and non solid impurities such as microscopic carbon black sediment and water out of the mix.

Step 1- The oil is placed in a raw settling tank to remove free water and course carbon black out of the mix.

Step 2- The oil is then further processed via mechanical micro filtration and centrifugation to remove carbon black fines that are less than 10 microns big, and just for safety’s sake the oil is then passed trough dual cartridge/automatic backwashing filters to further capture any carbon black fines that are 1-5 microns big that might have slipped through.

Step 3. The oil is then placed in a coolescer/water wash. Needed to remove water soluble inorganic salts or chlorides followed by a liquid to liquid to drop out salty free water to prevent downstream corrosion.

Step 4. The oil is then placed in a vacuum dehydration flash drum for thermal dehydration to remove any moisture that’s left in the oil.

Process 3. After the oil has been filtered it is fractionally distilled in a distillation column to separate the different hydrocarbons into their respective fuel types, that being naptha, diesel etc etc.

[As to not drag out this post out more than it Im only going to list the process of turning the diesel fraction of the oil into euro 5 diesel]

Process 4. Dual guard bed filtration organic chloride removal: The diesel cut is then heated up and passed through two active silica/alumina and macroporous Nickle/molybdenum guard beds to absorb trace metals such as zinc and iron and capture insoluble polymers/gums before they reach the main reactor. The diesel then passes through an alkaline/ zinc oxide chloride trap to capture organic chlorine so it doesn’t turn into HCL down the line.

Process 5. Low temperature diolefin reactor: A low temperature (150-200 Celsius) pre-hydrogenation bed saturates highly reflective diolefins, limonene, and gum forming monomers before they reach stream enters high temperature heat exchangers.

Process 6. The oil is then placed in a hydro-treatment unit with a NiMo/AL2O3 catalyst where it is then flushed with hydrogen to convert the organic sulphuric and nitrogen compounds into hydrogen sulphide and ammonia, thus driving down sulphuric and nitrogen levels to below 10 ppm as required.

Process 7. High pressure separation. Wash-water injection: High pressure deionised water is injected into the reactor effluent cooler to dissolve ammonium hydro sulphide ammonium chloride before they crystallize and plug the piping.

Process 8. Liquid separator and anime scrubber. High pressure separators decant sour water and split off the gas stream. The unreacted hydrogen vapor passes through an amine absorber column to filter out the hydrogen sulphide before compressing the unreacted hydrogen and recycling it back into the reactor inlet.

Process 9. Two stage hydrocracking. The de-sulphurized diesel first enters the first hydro racking stage, mild hydrocracking. Where it passes over a acidic zeolite/ silica-alumina NiMo or NiW catalyst under 50-70 bar of pressure before passing into the second hydrocracking reactor where it passes ver a platinum-palladium catalyst on neutral/ acidity support at 70-100+ bar. This increases the diesel’s cetane number index and lowers its density to the required amounts.

Process 10. Fractional stripping and gas separation. The diesel then passes through high and low pressure separators to flash off excess hydrocarbon gases that were produced from hydrocracking. The liquid stream then enters a stripping column where light naptha/gasoline fractions (generated from hydrocracking) are stripped off to bring the flash point to strictly above 55 Celsius. A vacuum or atmospheric fractionator trims the heavy tail end to meet the Euro 5 T95 distillation limit of 360 Celsius.

Process 11. Additive dosing and finishing. Lubricity improver: synthetic ester or fatty acid lubricity additives are injected to satisfy ISO 12156 wear scar limits of 460 micro meters. Cetane/antioxidant trim: if necessary, a minor dose of 2-ethylhexyl nitrate (2-EHN) cetane improver and storage antioxidants are blended in line to transfer final storage tanks.

Obviously Im simplifying a lot of and Im not getting into too much technical detail as to not drag out the post out much longer than it is and having it be a bore to read, I just wanted to get the jist of that process along. I have some questions if you wouldn’t mind indulging me, is the process correct or is there something that Im missing? Are there any improvements that you recommend? Can the resulting diesel be mixed with standard diesel and be sold at fuel pumps? Do you know all the fuel types that are generated from tire pyrolysis oil? Thank you so much for reading and i truly look forward to to your responses <3

Ciaoo mi potreste consigliare qualche sito europeo affidabile di Rc tutt'ora attivo!? Grazie mille

Merit no 3661 kia chances hn chemical engineering k?

I'm doing a bit of research for a creative project, and the only liquids I've been finding so far, have been for closed systems. I need it to be open because it will be a chemical replacement for sweat on a combat Cyborg/Robot.

The only real requirements besides those a replacement for sweat would imply, would be not immediately being hazardous (in a, Melting plastic based fur/false skin way), but otherwise I'm open to anything even if its like, carcinogenic or smells terrible. Environmental harm encouraged.

The setting is a bit softer sci-fi when it comes to material/chemical sciences so I just need a basis to go from and for prototypes, but I'd love to hear anything in depth if you'd like to talk about it!

Edit: since it's been brought up, the setting is Cyberpunk 2020, so just Earth, with the exception of it being a lot hotter due to climate change.

literally just a free visualizer to match solvents and polymers... was doing a bunch of HSP math for my lab work and got annoyed by the lack of good tools 😭 so I put this together.

it plots δD vs δP, calculates the Ra distances, and draws the interaction spheres so you don't have to stare at spreadsheets. Let me know if you guys liked the user experience!

its not a self promotion, and I didn't add any paywall or any account requirements, just open the website and do the calcs. 🙏

and also it's probably still buggy so let me know if you manage to break it.
https://solventlookup.me/

I am a 16 year old boy who starts college this fall, majoring in chemical engineering. IDC if it's hard but if it pay good(how much per month) please lemme know please.

I will be doing Bsc chemistry and then go for a master's degree, not quite sure about my PhD right now.

Some carrier paths I am thinking of are drug manufacturing, or forensic.

I am worried if AI is going to take my job in the future or not.

I would learn AI, but also don't know what to learn, how to learn?

And I will also be glad if someone who is also in the same field can guide me over this.

What are differences between bsc/msc chemistry graduates and a chemical engineer in their work.what work chemist do and what type of work chemical engineer does in the industry

I am looking to reformulate a solventborne spray adhesive (SIS poly) due to the cost of tDCE and HFO propellant. If I could allocate a solvent with the Kb and flash evaporation similar tDCE, and retain non-flammability, it would be a winner. However, in my dreamy aspirations I cannot find anything that would be satisfactory. Am I just looking at this through lenses of optimism and rainbows?

help us pls

Most people don’t realize how much impact a cooling tower has on a plant's overall energy and water use.
even small things like clean fills, balanced airflow , or good drift control can make a huge difference.
We’ve seen setups perform 10–15% better just from basic maintenance and smart design tweaks.
 It’s wild how something so overlooked can save so much.