Caffeine extraction from green coffee with supercritical CO2--- make money online

I finally succeeded in extracting caffeine from green coffee beans by using supercritical CO2. I built a high pressure chamber from 2" steel pipe fittings, and poured in 200mL of water.  There is an aluminum screen above the water line, which held 0.75 lbs of moisturized green coffee beans in the upper part of the chamber. I added liquid CO2 to the

chamber, then closed all valves and raised the temperature, making the CO2 pass into the supercritical phase.  I left the system overnight at about 60*C, 3000 psi, then drained the water.  It was very black due to impurities and some bean burning that occurred where my electric strip heater caused localized overheated zones in the chamber. The water was highly caffeinated, and tasted somewhat like coffee.  I used a typical hydrocarbon extraction process to isolate the caffeine from the water (will show this in a later video).

there it is folks purified caffeine

crystals extracted from green coffee

beans with supercritical co2 finally

success originally I tried doing this

with a paintball high pressure paintball

supply cannister and I kind of packed

some dry ice with coffee beans in there

and that really didn't work at all

because I didn't have enough control

over the conditions inside the canister

so this time I decided to modify my

supercritical drying chamber that I

built for aerogel production so I got a

few more pipe fittings a cap these are

all schedule 80 steel pipe fittings and

I drilled a hole in it and tapped the

hole and got some high high density

teflon tape so mcmaster calls this

military grade as opposed to commercial

grade and not only is the tape thicker

but it's also more dense and so when

sealing those large two-inch pipe

fittings I found that the higher density

teflon tape really really works a whole

lot better so definitely get that and

it's only an extra dollar or two for the

military grade roll

so I started assembling the chamber it's

basically built similarly to the

original supercritical drying chamber

but it has an extra six inch pipe nipple

on the top and bottom side of the tee so

that the whole chamber is you know about

of 18 inches long or so and my plan was

to put some water in the bottom of it

and then put the coffee beans above it

so what i did was i you know assembled

the chamber and held it vertically and

then i machined a aluminum disc and

drilled a bunch of holes in the disk so

that it would sit down into the chamber

but it was it would be supported by the

lower pipe nipple so basically the

coffee beans couldn't fall through the

screen which is supported by this

aluminum disc and the water would stay

separate down the bottom of the chamber

there so I measured out about 200

milliliters of water and poured that

into the chamber and then I set about

preparing the coffee beans so most most

of the patents that I read which is

where I got most of the information

about this

Isis stated that the coffee beans had to

be moisturized before extracting the

caffeine from them and I guess the

reason for this is that the

supercritical co2 doesn't penetrate as

well if the beans are dried so these

green coffee beans that I bought from

the store coming up like a foil bag and

I'm not sure what the moisture content

is but it's pretty low I mean though

they're very dry so the patents

suggested you know moisturizing them

with steam or hot water and the process

kind of varied from patent to patent but

I basically steamed these for about 10

minutes in a kitchen like steamer like

it were held above the water so that

just the Stephen contacted them and then

I actually dumped them into the water

and soaked up about about a cup and a

half of hot water for the whole pound of

green coffee beans and so the idea is

that the swollen you know that the

softer coffee beans will be easier for

the supercritical co2 to penetrate and

actually pull out the caffeine so I

built the rest of the chamber and loaded

up those those soaked green coffee beans

they really soaked up all the water -

there was no residual water left in the

pan so there was nothing to worry about

you know losing any caffeine in that

regard put the tie so I couldn't fit the

whole pound in unfortunately either I

only got about 3/4 of a pound

frustratingly I measured the chamber

with the dry coffee beans with the dry

green coffee beans and it held the whole

pounds just fine and then when I you

know soaked him in water they swell up

quite a bit and I couldn't fit the whole

pound in the chamber anymore with the

with the water compartment at the bottom

so anyway so I got about 3/4 of a pound

in there and got the cap on and my plan

was to have 2 fittings at the top you

know an inlet and an outlet like I did

for the supercritical drying chamber so

that I could connect the inlet to my

siphon tube co2 tank and then open the

outlet valve a little bit and the liquid

would sort of fall into the chamber and

a little bit of co2 gas would come out

but I could overall transfer liquid from

the cylinder into the chamber by letting

this co2 gas out but apparently this

doesn't work quite so well when the

chamber is packed full of green coffee

beans

and so when I was opening the valve I

was just getting you know basically a

spray of rapidly boiling co2 out of it

so what I ended up doing was just

closing all the valves or closing the

outlet valve and the drain valve at the

bottom and just heating up the supply

cylinder gently and that actually worked

pretty well so when the temperature and

the supply cylinder Rises it's it's

temporary it's pressure increases but

this chamber pressure does not so

there's a pressure gradient and liquid

is transferred from the cylinder to the

chamber so I filled it up about about

what I considered half-full I kept the

glass the sight glass in the tea so that

I could see the level of co2 so as I was

filling it up

I could actually watch the level of co2

rising and figured that was about

half-full lifts of co2 of liquid co2 so

after I had that I closed off all the

valves and then started heating the

chamber up and I have a gauge on it so

that I could see what the pressure was

in the in the chamber that was actually

an addition that wasn't there on the

drying chamber that should have had a

gauge anyway and so that worked pretty

well I was able to make the co2 go

supercritical just with with heating it

with a torch and then most of the

patents call for a like a soak time of

around 8 hours or something like that

and most of them call for even higher

pressures than I was able to go I

actually went over the working pressure

limit of that sight glass I won't tell

you by how much but yeah it went over a

bit so I was very careful and nervous

about being around this chamber when it

was under such a high pressure what I

ended up doing was wrapping the chamber

with a electric heating element and then

wrapping the chamber in some fiberglass

insulation and left it overnight with

the electric heater running and that

worked pretty well I could even vary the

temperature by kind of opening and

closing the the fiberglass mat on it to

let more or less ambient air in and I'd

like to say that worked pretty well so

it maintained the temperature of about

50 or 60 degrees C at a pressure you

know

two or three thousand or even a little

over three thousand or something and

most of the patents call for slightly

higher temperatures and pressures but

you know this was about as much as I was

comfortable with so the next day I

opened the drain valve and started

extracting you know after cooling the

chamber down and started extracting the

water which to my surprise was

completely black I mean it was like

India ink black I had no idea what was

going on here but I recovered most of

the water except for this you know after

draining the thing of water

the co2 starts coming out of course and

the co2 freezes into dry ice in the exit

valve and you know suddenly a chunk

flies out and there's there's like a

sudden depressurization it doesn't come

out on a smooth stream comes out and

fits and starts and eventually blew a

big blast of co2 and splatter the India

ink water everywhere which explains my

stained hands and fiberglass here anyway

it didn't lose too much so I took my

India ink water there and of course I

had to taste it it's actually kind of

vaguely similar to coffee to tastes you

know fresher greener than and coffee

like it has a much more of an herbal or

planty kind of taste to it but I

suspected that this was very caffeinated

water and as it turns out it most

definitely is caffeinated water it's

quite caffeinated

in fact just by letting it sit for a

while I was able to see caffeine

crystals in the water by cooling it down

so I tried putting it in an ice bath

figuring that I could filter it just to

get the caffeine crystals out but there

are so many impurities in this water

that I ended up resorting to a

hydrocarbon extraction and so I'm going

to make another video about extract and

caffeine from this liquid because it did

end up requiring another solvent which I

was trying to avoid I think in the

future I may try some other techniques

to use just water one of the goals for

this project was to see if I could

actually go all the way from green

coffee to caffeine with just

supercritical co2 and water

which didn't happen in this experiment

like I said I required methylene

chloride to actually get the caffeine

out of the aqueous solution but anyway

that'll be a future video so this

process is pretty similar to what

happens in industrial decaffeination

plants with the differences that to

actually decaffeinate the green coffee

beans that the co2 has to be pumped

through the bed of coffee beans and then

washed of the caffeine so that

relatively caffeine free co2 is

introduced back into the bed again in my

case what's happening is the caffeine

leeches out of the coffee beans into the

supercritical co2 and then into the

water and so there's no there's no

constant gradient to keep lowering the

value of co2 or of caffeine in the

coffee beans it's just sort of all one

you know concentration level so I'm sure

there's quite a bit of caffeine

remaining in the green coffee beans the

purpose of this experiment was just to

see if I could get the transfer through

the supercritical phase into the water

and that definitely worked so I'm pretty

psyched about that like you say next

video will be a caffeine extraction with

the methylene chloride which is pretty

cool - okay see you next time byeTop Search Keyword : online earning, , make money online, earn money online, online earning, online earning sites, make money online free, online money income, earn money online free, money online, best way to earn money online, online income site, money earning websites, best online earning sites, easiest way to earn money online, earn money payment bkash, online money income site