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which of the naphthas in this list would be the VM & P naphtha?

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lorax

lorax

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Naphtha (petroleum), heavy alkylate
EU EINECS No. 265-067-2
CAS Registry No. 64741-65-7
Proprietary name (Shellsol T)

Naphtha (petroleum), hydrotreated light
EU EINECS No. 265-151-9
CAS Registry No. 64742-49-0
Proprietary name (Shell SBP 140/165)

Naphtha (petroleum), hydrotreated heavy
EU EINECS No. 265-150-3
CAS Registry No. 64742-48-9
Proprietary name (Shellsol D60)

naphtha (petroleum), solvent-refined light
EU EINECS No. 265-086-6
CAS Registry No. 64741-84-0

solvent naphtha (petroleum) hydrotreated, light naphthenic
EU EINECS No. 295-529-9
CAS Registry No. 92062-15-2
Proprietary name (Exxon Mobil Nappar 6)

solvent naphtha (petroleum), light aromatic
EU EINECS No. 265-199-0
CAS Registry No. 64742-95-6
Proprietary name (Shellsol A100)

solvent naphtha (petroleum), heavy aromatic
EU EINECS No. 265-198-5
CAS Registry No. 64742-94-5
Proprietary name (Shellsol A150)


since SWIM cant get his hands on VM & P in germany he thought of buying some directly from shell chemicals. all SWIM needs to know is which one is the right one. then SWIM can go by proprietary name from now on. the main problem is that naphtha is a term which is very diffuse. there are all sorts of chemicals which go by that name.

any help would be greatly appreciated.

may the light guide you to peace and happiness.
 
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thanks dude! you saved SWIMs extraction! SWIM had some naphtha which left sludge. the dude at the hardware store told SWIM that it was sludge free.. which it wasn't! it was the fault of that guy from the hardware store that SWIM couldn't take part in the Synchronized Hyperspace Event. SWIM will be able to join the next one.

to anyone living in germany needing naphtha: Shellsol T is what you want! you can get it on ebay for 9,95 eur per liter.
 
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The warm glow you get from your necrobump award should help the naphtha evaporate nicely. 😁

Are there any identification codes (as per the OP) that might help distinguish the composition of Shellsol T? It sounds like a medium to heavy naphtha judging by your evaporation difficulties.

At what stage of what process is this evaporation taking place? If you've used a heavy naphtha and it won't evaporate from your crystals, you might be better off finding something lighter - such as heptane - and recrystallising your product with that.

If your product is stuck in heavy naphtha and won't come out, you'll need to pull it back out using some kind of acid, add base to the acidic water and then pull with a lighter naphtha a few times.
 
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I had to search "necrobump award"... sorry if I bumped some forum etiquette rules.

The OP has the same CAS number that I have. Its a synthetical isoparaffinic hydrocarbon solvent as according to the MSDS.

STB tek. I did the freeze precipitation and drained the Shellsol T. After one week, in the precipitation dish i stil see some very small specks of liquid between the spice, meanwhile the spice went from a wet look to dry and lost most of the smell. The coffee filters (two pulls) used for filtration of suspended crystals when I drained the solvent are dry as is the spice in them.

I already scrapped the spice of the first pull and second is still on the dish. As Shellsol T is so slow to evap. I actually decided to go with heptane for the r-ex and have it on the way.

so to be safe, at this stage i just nedd to go with the r-ex or do I need to do the A/B?

thanks for the help.
 
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To anyone living in one of the German speaking countries, i can highly recommend using medicalcorner24.com "Wundbenzin". It's about 10€ per liter and it's been working just about perfect for me.

An even cheaper alternative is "Klax Waschbenzin" from DM market if you are actually in Germany. It's ~5€ per liter and gives great results too.

Both options evaporate cleanly and quickly.
 
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Marchant de Sable said:
I had to search "necrobump award"... sorry if I bumped some forum etiquette rules.

The OP has the same CAS number that I have. Its a synthetical isoparaffinic hydrocarbon solvent as according to the MSDS.

STB tek. I did the freeze precipitation and drained the Shellsol T. After one week, in the precipitation dish i stil see some very small specks of liquid between the spice, meanwhile the spice went from a wet look to dry and lost most of the smell. The coffee filters (two pulls) used for filtration of suspended crystals when I drained the solvent are dry as is the spice in them.

I already scrapped the spice of the first pull and second is still on the dish. As Shellsol T is so slow to evap. I actually decided to go with heptane for the r-ex and have it on the way.

so to be safe, at this stage i just nedd to go with the r-ex or do I need to do the A/B?

thanks for the help.
Click to expand...
Ah, it was just the evil clown that hides in my avatar 😁 The composition of some naphtha brands have changed over the course of time so it's best to seek out current information.

Yes, the initial boiling point of Shellsol according to the MSDS is rather on the high side (189°C/372°F).

I'd be inclined to suggest going for a mini A/B. It would take a couple of recrystallisations to clean up your current product to what I would consider a satisfactory level.

Dissolve your DMT in some kind of acid - maybe then give that solution a quick wash with heptane, especially if oily droplets become visible. Then you can add base again and do a few small pulls with fresh heptane. It'll be best to warm the heptane for the pulls (no naked flames - use a water bath!) as well as the aquoeous phase. Then let the pulls cool slowly before finishing the precipitation in the freezer.

Let us know how it turns out!
 
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Just to report on the issue of the Shellsol T for anyone interested.

Before I asked for help here I had a 3rd pull going with Shellsol T and for the drying/evap of the solvent I used a heating mat under the dish to see if the solvent was quickier or more effective to evaporate, and it sure did helped. After around 3 hours there was no visible moister also the smell was a lot less noticible than the first pulls (take in notice that this solvent is very low odor, so its not a very good indicator).

Regarding the mini A/B since was suggested here i'll report it here, I really didn't know the details to go about so I proceded acoording to my research about mini A/B here in the Nexus and what downwardsfromzero sugested.

The process was:

1. Mixed the spice (0.578gr) with 40ml white vinegar until disolved.
2. Add 6gr of lye to the previous mixture. Note: My notes only say 6gr of lye but I think at the time I had to add more because it didn't reached the desired ph of 10-12.
3. Added 20ml Heptane, previously warmed in a hot bath.
4. Did 3 pulls. First pull was immediately after adding the hot Heptane, second pull after around 12-15hrs, third pull after 3hrs.
5. Freeze precipitate for 24hrs and after drying I ended with 0.41gr of spice.
6. R-ex the spice with hot Heptane and that brought my yield to 0.26gr.


Some after ideas (if such a thing a small sprout is allowed to have):

- Perhaps I should have diluted the acid and lye in water for the mini A/B to have a better control of ph?

- I thought since the lye didn't had to work to break plant material I could effectively pull immediatly after mixing the solvent and would get all the spice on the first pull, and ended with a very clear Heptane layer. Freeze precipitated the 1st pull and ended with a very low yield.
Since I was not sure of the process and suspicious of the 1st pull I saved the base and in the next day it had changed from a uniform yellow to a base with kinda two layers: being the lower one a clear yellow and the upper one a cloudy or saturated yellow liquid and on top the thin leftover of Heptane. So for the next one I mixed the base with more 20ml Hep and saked vigoursly. Ended with an emulsion that was breaked with salt, waited 3hrs for the pull. Did one last pull, mixed and waited 3hr.

I sincerly apologise for any stabing done to the good name of Chemistry but take solice that all this described is just a figment of the imagination and no actual chemical where mixed or harmed, let alone wasted.

One love.
 
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