Enjoying those great courses series videos. You are the man Professor RDjr. Love your clear thorough way of teaching. With a touch of humor, that shows just how cool you are. Most individuals as accomplished and with credentials as yourself have an extreme case of God complex. Thanks for everything sir. It is greatly appreciated.

@ChemSurvival

5 жыл бұрын

WOW! Such kind words. Thank you so much. I always tell my students that my job is to teach, not to entertain.... but hey... why can't I do both? ;-)

Thanks for pointing out all the small but important details.

When laboratory is also online because of covid

when inserting the thermometer into the thermometer adapter, you should hold the thermometer very close to the adapter when pushing it in. if you hold the thermometer far away from the adapter, there's a chance that you might break it. other than that, great video.

Thanks! It helps my chemistry :D

Dear Professor Davis thanks a bunch for the insightfully meticulous video. I have a question: in some situations the water condenser inlet and outlet of water are exactly the way you have displayed in your video. However, in some situations the entrance and exit connections are mentioned to be exactly the opposite. Which process is correct in which situation? Please guide me. Thanks.

I sure would hate to see the complicated version of that, but im green, so, thanks for the demo.

What about using a Vigreux column to avoid reflux (especially when using a 250ml or larger volume Florence flask)?

@ChemSurvival

4 жыл бұрын

I just received my first Vigreux column for my 1 L, 24/40 setup at home. It should be really efficient. I can't wait to try it!

i place a thermometer at the vapor front to the condenser elbow but the reading im getting is 85c for ethanol. do i raise the thermometer tip higher then the elbow ?

Can I make lemon essential oil with this method? Is there a difference in yield using two flasks? Will I need to add anything other than distilled water and lemon peels? Thanks?

This is great! Thanks for posting.

@ChemSurvival

4 жыл бұрын

Thanks for watching! Don't forget to like share and subscribe to my channel. There is a lot more content there!

The condenser is a very cool piece of glassware. I wish I did my degree in chemistry :/

@ok-dy2tz

2 жыл бұрын

what did you do instead

Could you use a flat bottom flask directly on a hot plate stirrer instead of the round bottom in the mantle?

@ChemSurvival

Жыл бұрын

If I understand correctly, you are suggesting using an Erlenmeyer flask as the boiling flask. If so, the short answer is yes, it could be done. The long answer is that it must have a proper joint for making gas-tight connections (which most Erlenmeyer's do not), and even if it did, heating and mixing in an Erlenmeyer wouldn't be as even as they are in a round-bottomed flask, which would increase the risk of bumping (flash-boiling) causing liquid to froth up into the still head. Both of these limitations probably explain why most would go for the round-bottom boiling flask.

Can I get a drawing/plan or any info about the system built onto the wall for clamping the equipment, please ?

For showing the general set up of distillation the video is really good. But one should not follow this technique as it is. The safety part is completely ignored. The video should start with (1) proper inspection of glasswares (2) attaching the water line to the condenser before attaching it to the line (3) attaching proper clips for the water line to the condenser. Also one should have cut resistant glove during the job.

Great explanation on how to set up and run the simple distillation but I don't understand what you are aiming for cuz you were still getting ethanol towards the end into the H2O??

@skerpy8145

4 жыл бұрын

Cj James he wants to keep both of the substances

What should be done to prevent material loss while Simple Distillation ?

Hi. Excuse me, I had a question: I want to produce 70% alcohol for disinfection by combining sugar and baking yeast and distilled water. What should be the temperature of the fermentation liquid in the barrel during the fermentation stage? What should be the ambient temperature? I am a member of your channel and I watch your clips. Thank you very much and good luck.🙏❤💜💙🌹🌹🙏

@thenotsomadhatter4291

2 жыл бұрын

Distillation of alcohol is illegal in most countries. This is because it is an explosion risk and can be exceptionally dangerous. If you live in an area where it is legal, the boiling point of ethanol is 78 degrees. If you aren't using it for drinking purposes, any methanol left over should be fine (poisonous if drunk). Be sure to use a flameless heating source and ensure no pressure builds in your setup.

@sorena.parsi2500

2 жыл бұрын

@@thenotsomadhatter4291 Hi. I asked about fermentation, not about distillation !!!!!! You did not pay attention to my question, please pay attention to my explanation above. Thanks.

why would the water supply should be connected to the lower port in the condenser?

@ChemSurvival

3 жыл бұрын

This ensures that the water jacket fills completely from bottom to top. Plumbing it in the opposite direction can lead to a trickle of water running through the lower portion of the jacket but not the upper portion, causing less efficient condensation. Essentially plumbing it this way ensures that as much vapor as possible condenses and this collected rather than escaping system.

@abiyyurahmat3473

3 жыл бұрын

@@ChemSurvival thanks for the answer

Why did you grease the RBF lip before you added your sample? aren't you risking getting grease into the sample?

@ChemSurvival

Жыл бұрын

A fair point in general. There are those who disagree completely with the use of grease unless you are using the glass in a vacuum application. They're usually concerned about contamination of their sample. We apply a small bit in our teaching Labs because we found that it helps to discourage joints from separating and leaking vapor during a distillation or reflux. The trade off of course is the possibility of contaminating your sample if you plan to use it for a subsequent experiment or to characterize it spectroscopically. At this point in my course we don't have any intention of reusing the solvent. Also, we aren't ready for spectroscopy at at that point anyway, so we opted to use the grease because it tends to help give a more consistent temperature profile in the experiment we conduct.

What do you use for water in the condenser if you don't have a sink handy? I do my experiments outside bc I do not own a fume hood. Should I just get some water that is close to freezing, but not frozen and fill the condenser with it, Switching it out as the experiments goes?

@ChemSurvival

4 жыл бұрын

get a small fountain or aquarium pump like this one. It is the one I use. It is super cheap and has a very low flow rate, but it (barely) gets the job done. www.amazon.com/gp/product/B00EWENMAU/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 be sure whatever you purchase has an appropriate nozzle size (uaually 0.33 inch will work with most 19/22 glassware), and that the pump is powerful enough to reach the necessary height (about 3 feet if your water reservoir will be on the bench alongside your apparatus, but more if you will be pumping from the ground to a table, fore example. Now, fill a cooler with ice water and plumb the aquarium pump to your condenser, and the return line back to the cooler. The cooling supply should last for hours when performing small scale distillation.

What if I don't have a main lab drawer?

The ethyl alcohol will boil first (70 to 75 deg C) and water will boil next (100 deg C).

Professor Dave , what is the brand for the thermal well

Wow that was great, thank you.

DOES THE WATER HAVE TO STAY ON.

@Butterflytaxidfw

3 жыл бұрын

YES

very good video and well explained as well

great , thankby the way i have crude oil refinery by simple distillation.i have a problem that is ....if i refine 100 barrels of crude oil , i get back product of gasoline (10 barrels ) , diesel (40 barrels) , waxy diesl ( 30 barrels) and residual (10 barrels ).i want to reduce pour point of waxy diesel ( gelling at 30•C).can you give me some advice ,thank....

You should add a Fractional column between the three way adapter and the RB flask. This is a simple distillation, I understand, but ethanol need a Fractional column.

So you distilled 50% alcohol in order to concentrate it to a higher percentage. I'd like to know how you get all the water out though.

@Salk5991

4 жыл бұрын

Molecular sieves, nilered has a video on how

Great video

very informative, thanks

Can someone recommend a good distillation kit to buy?

@henanchengyitongmachinerye7475

4 жыл бұрын

We can provide it and please contact me by Email: yolanda@hnchengyitong.com

Question :how does the cold water coming in affect the constitution of the distillate ? Isn't some of that cold water staying behind ? If so how significant is it . Thanks in advance

@ChemSurvival

6 жыл бұрын

The answer is that the cooling water does not mix with the distillate at all. The cold water is running through a cooling jacket in the outer of two concentric tubes in the condenser. The distillate itself is condensing in the inner of the two concentric tubes. The cooling water is only there to keep the temperature of the glass low enough to promote condensation. It simply flows through the outer jacket and into the lab sink, never coming into contact with the sample.

@suesue9399

6 жыл бұрын

Thank you

@odunayorebecca6417

6 жыл бұрын

Sue Sue how do know it

@MadNlGER

4 жыл бұрын

🤦‍♂️

@wernerhiemer406

3 жыл бұрын

@@odunayorebecca6417 It distills to simple reading some text.

Very nice

Love from India

Nice vid bro

Thank you so much for this!!

very nice

Explained nicely

thanks

who from L61? if you know you know

you need to clean that dirty ass station.

Thanks sir

Very nice, thank you !

@ChemSurvival

7 жыл бұрын

Glad you found it useful. More videos like this are coming soon to my channel! kzread.info

@whiskeyblood

6 жыл бұрын

Excellent video. Well shot and very well explained. Do you accept questions from amateurs?

0:39

actually this is our lesson in science

Refinery proses

Iklan nya kereeen

Science gang where you at boi

Well done

Mbahasa Indonesia nya pliss

Manda o salve papaléguas, consiste em fazer o barulho do papaléguas e correr por ai :)

2024

A AM. ARABIK

hirap

What a gross and dirty environment you're doing this in. I'd shit if a tech ever left my lab or equipment looking like this.

WTAmounus

Samjh nahi aa rahi 🤷🏾‍♂️

@kimtaehyung9495

3 жыл бұрын

There r many more videos for simple distillation so u can check them out if u don’t understand this :)

@shehzadahmad3606

3 жыл бұрын

@@kimtaehyung9495ok Thanks

@kimtaehyung9495

3 жыл бұрын

shehzad ahmad np :)

why your accent of english is so twisted as if some words are inside ur mouth and some are coming out. i can't understand what u are speaking neither the youtube captions are cannot recognise what u are speaking of. Speak Properly.

@ChemSurvival

2 жыл бұрын

riiiiiiiiiight.....