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Old 06-21-2017, 06:33 AM #1
dabboy
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Why cold butane is slow rate then room temp butane in a cls ?

People like to cold the butane and then extracts for a better result .
But is slow rate compared to room temp butane .
I think the cold butane should flow faster than the room temp butane since the butane is cooler and it's liquid in that form ?
Am i correct ?
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Old 06-21-2017, 02:37 PM #2
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Originally Posted by dabboy View Post
People like to cold the butane and then extracts for a better result .
But is slow rate compared to room temp butane .
I think the cold butane should flow faster than the room temp butane since the butane is cooler and it's liquid in that form ?
Am i correct ?
Lowering the temperature raises the viscosity, so it flows slower.
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Old 06-22-2017, 07:31 AM #3
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Quote:
Originally Posted by dabboy View Post
People like to cold the butane and then extracts for a better result .
But is slow rate compared to room temp butane .
I think the cold butane should flow faster than the room temp butane since the butane is cooler and it's liquid in that form ?
Am i correct ?
What Graywolf said. Think cold honey vs warm honey.
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Old 06-22-2017, 08:01 AM #4
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Butane at room temp is a gas and gases flow faster than any liquid.
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Old 06-22-2017, 07:33 PM #5
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If it is under pressure, it should still be a liquid at room temperature, but get thicker as it gets colder.
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Old 06-22-2017, 07:37 PM #6
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Does anyone have a chart showing butane viscosity at temperature?

Does anyone know what the practical temperature limits are for extraction?
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Old 06-22-2017, 07:47 PM #7
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butane acts like freon.... there is a temperature pressure relationship.... the higher the temp the high the pressure... conversely the lower the temperature the lower the pressure

thats why when you take a bottle of butane and release its contents it gets real cold at the point of release cause there is an immediate drop in pressure.....

The reason you can have liquid and gas in a can of butane is cause it was filled under vacuum
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Old 06-24-2017, 01:24 AM #8
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i think what he is getting at is why do people use cold butane even though its slower. obviously we know that its slower because of its increased viscosity. but i think the valuable information he is looking for is that we like sub zero temps because the solvent becomes more selective at those temps not pulling as many undesirables and water content. warm solvent is much more aggressive. for those looking to make high quality and boutique level extracts the colder the better.
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Old 06-24-2017, 04:29 PM #9
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Quote:
Originally Posted by pnw bb View Post
i think what he is getting at is why do people use cold butane even though its slower. obviously we know that its slower because of its increased viscosity. but i think the valuable information he is looking for is that we like sub zero temps because the solvent becomes more selective at those temps not pulling as many undesirables and water content. warm solvent is much more aggressive. for those looking to make high quality and boutique level extracts the colder the better.
The key is that the molecules we seek are primarily C-10 through C-22, and the molecules we avoid are C-30. Extracting at low temperatures limits extraction of the C-30 molecules more than it does the lighter ones.

Solly SM, I haven't seen any viscosity charts, but we typically add propane below about -30C and extract down to around -50C with it.
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Old 06-24-2017, 05:38 PM #10
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Can you explain how the term viscosity applies? butane is a solvent or am i missing something?
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