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Much of the untaxed ethanol uses the benzene process.In article <g31s46p08a2d3iasq94q31guq46k07n7ra@4ax.com>, "krw@att.bizzzzzzzzzzzz" <krw@att.bizzzzzzzzzzzz> wrote:
On Mon, 26 Jul 2010 19:04:22 GMT, zekfrivo@zekfrivolous.com (GregS) wrote:
In article <slrni4rlsb.9v8.gsm@cable.mendelson.com>, gsm@mendelson.com wrote:
GregS wrote:
95% is a very good figure. I actually use the NON-denatured stuff.
How about the drinking stuff? (95% "grain" alcohol).
Here I can by a "fifth" (750ml) for less than 250ml of 70% Isopropyl.
Yes I was reffering to the ethanol drinkable stuff that is not taxed.
Been used for years in medical parties.
Not a wise move. The un-taxed stuff (not for human consumption) often
contains benzene.
Thats the 99% stuff that contains benzene.
Right. Methanol is a very poor denaturant. The idea is to make itDavid Nebenzahl wrote:
Why mess around with isopropyl alcohol at all, since all of it
contains *some* water? Use denatured alcohol (methanol) instead, in a
tightly-capped container to guard against absorbing moisture.
Perhaps it is different where you live, but here in the US, denatured
alcohol is not methanol; it is, instead, ethanol with a denaturant added.
The denaturant can be methanol, or it can be any number of other chemicals,
so long as it is sufficiently adulterated to prevent a person from using it
for ingestion.
The treatment for Methanol poisoning is Ethanol and lots of it. Usually byOn Mon, 26 Jul 2010 22:30:29 -0700, "Jon Danniken"
jonSPAMMENOTdanniken@yahSPAMhoo.com> wrote:
David Nebenzahl wrote:
Why mess around with isopropyl alcohol at all, since all of it
contains *some* water? Use denatured alcohol (methanol) instead, in a
tightly-capped container to guard against absorbing moisture.
Perhaps it is different where you live, but here in the US, denatured
alcohol is not methanol; it is, instead, ethanol with a denaturant added.
The denaturant can be methanol, or it can be any number of other
chemicals,
so long as it is sufficiently adulterated to prevent a person from using
it
for ingestion.
Right. Methanol is a very poor denaturant. The idea is to make it
undrinkable, not lethal. Someone ralfing their guts out for an hour is
cheaper than blindness or death. Now, Sterno...
AIUI, this swamps the liver so it doesn't produce as much formaldehyde atkrw@att.bizzzzzzzzzzzz> wrote in message
news:6umu46159hqem3o9anb0camshgio9j30gp@4ax.com...
On Mon, 26 Jul 2010 22:30:29 -0700, "Jon Danniken"
jonSPAMMENOTdanniken@yahSPAMhoo.com> wrote:
David Nebenzahl wrote:
Why mess around with isopropyl alcohol at all, since all of it
contains *some* water? Use denatured alcohol (methanol) instead, in a
tightly-capped container to guard against absorbing moisture.
Perhaps it is different where you live, but here in the US, denatured
alcohol is not methanol; it is, instead, ethanol with a denaturant added.
The denaturant can be methanol, or it can be any number of other
chemicals,
so long as it is sufficiently adulterated to prevent a person from using
it
for ingestion.
Right. Methanol is a very poor denaturant. The idea is to make it
undrinkable, not lethal. Someone ralfing their guts out for an hour is
cheaper than blindness or death. Now, Sterno...
The treatment for Methanol poisoning is Ethanol and lots of it. Usually by
IV.
Yup. Recipies for denaturing ethanol seem to vary a lot by countryPerhaps it is different where you live, but here in the US, denatured
alcohol is not methanol; it is, instead, ethanol with a denaturant added.
The denaturant can be methanol, or it can be any number of other chemicals,
so long as it is sufficiently adulterated to prevent a person from using it
for ingestion.
Right. Methanol is a very poor denaturant. The idea is to make it
undrinkable, not lethal. Someone ralfing their guts out for an hour is
cheaper than blindness or death.
The same treatment is also used at times in cases of poisoning due toRight. Methanol is a very poor denaturant. The idea is to make it
undrinkable, not lethal. Someone ralfing their guts out for an hour is
cheaper than blindness or death. Now, Sterno...
The treatment for Methanol poisoning is Ethanol and lots of it. Usually by
IV.
None of the 95%.On Tue, 27 Jul 2010 13:50:11 GMT, zekfrivo@zekfrivolous.com (GregS) wrote:
In article <g31s46p08a2d3iasq94q31guq46k07n7ra@4ax.com>,
"krw@att.bizzzzzzzzzzzz" <krw@att.bizzzzzzzzzzzz> wrote:
On Mon, 26 Jul 2010 19:04:22 GMT, zekfrivo@zekfrivolous.com (GregS) wrote:
In article <slrni4rlsb.9v8.gsm@cable.mendelson.com>, gsm@mendelson.com
wrote:
GregS wrote:
95% is a very good figure. I actually use the NON-denatured stuff.
How about the drinking stuff? (95% "grain" alcohol).
Here I can by a "fifth" (750ml) for less than 250ml of 70% Isopropyl.
Yes I was reffering to the ethanol drinkable stuff that is not taxed.
Been used for years in medical parties.
Not a wise move. The un-taxed stuff (not for human consumption) often
contains benzene.
Thats the 99% stuff that contains benzene.
Much of the untaxed ethanol uses the benzene process.
I wouldn't bet my life on it.In article <jrmu469u6g971p30bt3i94oool6vj2k8ub@4ax.com>, "krw@att.bizzzzzzzzzzzz" <krw@att.bizzzzzzzzzzzz> wrote:
On Tue, 27 Jul 2010 13:50:11 GMT, zekfrivo@zekfrivolous.com (GregS) wrote:
In article <g31s46p08a2d3iasq94q31guq46k07n7ra@4ax.com>,
"krw@att.bizzzzzzzzzzzz" <krw@att.bizzzzzzzzzzzz> wrote:
On Mon, 26 Jul 2010 19:04:22 GMT, zekfrivo@zekfrivolous.com (GregS) wrote:
In article <slrni4rlsb.9v8.gsm@cable.mendelson.com>, gsm@mendelson.com
wrote:
GregS wrote:
95% is a very good figure. I actually use the NON-denatured stuff.
How about the drinking stuff? (95% "grain" alcohol).
Here I can by a "fifth" (750ml) for less than 250ml of 70% Isopropyl.
Yes I was reffering to the ethanol drinkable stuff that is not taxed.
Been used for years in medical parties.
Not a wise move. The un-taxed stuff (not for human consumption) often
contains benzene.
Thats the 99% stuff that contains benzene.
Much of the untaxed ethanol uses the benzene process.
None of the 95%.
Long ago (1980?) I remember having problems with leakage on a board thatI also remember fellow in our section, working on something new, computer
"terminal monitors". There was some kind of problem, and he was taking
some
boards into the mens room to wash them off. i guess they worked after
that.
Interesting observation.I remember having problems with leakage on a board that
stored voltages in polystyrene capacitors using CMOS
switches and op-amps, but the voltage would bleed off too
quickly to be useful as a "memory". We tried all sorts of
flux removers and it still didn't work well enough. But I had
had an idea that it might be ionic contaminants such as
salt, so I took a board into the mens room and scrubbed
it with hand soap and flushed it with hot water. Then I dried
it with a heat gun, and "voila" it worked like a champ rather
than a chump.
Probably. But there may be some sort of oily residue that will be removed byI remember having problems with leakage on a board that
stored voltages in polystyrene capacitors using CMOS
switches and op-amps, but the voltage would bleed off too
quickly to be useful as a "memory". We tried all sorts of
flux removers and it still didn't work well enough. But I had
had an idea that it might be ionic contaminants such as
salt, so I took a board into the mens room and scrubbed
it with hand soap and flushed it with hot water. Then I dried
it with a heat gun, and "voila" it worked like a champ rather
than a chump.
Interesting observation.
Question... Wouldn't distilled water alone flush off ionic contaminants?
"William Sommerwerck" <grizzledgeezer@comcast.net> wrote in message
news:i32gbp$hnm$1@news.eternal-september.org...
I remember having problems with leakage on a board that
stored voltages in polystyrene capacitors using CMOS
switches and op-amps, but the voltage would bleed off too
quickly to be useful as a "memory". We tried all sorts of
flux removers and it still didn't work well enough. But I had
had an idea that it might be ionic contaminants such as
salt, so I took a board into the mens room and scrubbed
it with hand soap and flushed it with hot water. Then I dried
it with a heat gun, and "voila" it worked like a champ rather
than a chump.
Interesting observation.
Question... Wouldn't distilled water alone flush off ionic contaminants?
Probably. But there may be some sort of oily residue that will be removed by
the detergent. And hot water from the tap is much cheaper. It may be good to
do a final rinse with distilled or deionized water. I have heard that some
people stack their boards in a dishwasher. But my method works for me and is
is very practical for small quantities.
I noticed citrus based degreasers leave behind oil."Paul E. Schoen" wrote:
"William Sommerwerck" <grizzledgeezer@comcast.net> wrote in message
news:i32gbp$hnm$1@news.eternal-september.org...
I remember having problems with leakage on a board that
stored voltages in polystyrene capacitors using CMOS
switches and op-amps, but the voltage would bleed off too
quickly to be useful as a "memory". We tried all sorts of
flux removers and it still didn't work well enough. But I had
had an idea that it might be ionic contaminants such as
salt, so I took a board into the mens room and scrubbed
it with hand soap and flushed it with hot water. Then I dried
it with a heat gun, and "voila" it worked like a champ rather
than a chump.
Interesting observation.
Question... Wouldn't distilled water alone flush off ionic contaminants?
Probably. But there may be some sort of oily residue that will be removed by
the detergent. And hot water from the tap is much cheaper. It may be good to
do a final rinse with distilled or deionized water. I have heard that some
people stack their boards in a dishwasher. But my method works for me and is
is very practical for small quantities.
We used a citrus based cleaner in a commercial board washing machine
at Microdyne. It was a modified stainless steel industrial dishwasher
with a separate solvent tank and fresh water wash. Then the boards went
into a board drying oven for 12 to 24 hours. This was for small runs of
boards stuffed and reflow soldered in house.
In article <WtCdnar_6NJbXcvRnZ2dnUVZ_gadnZ2d@earthlink.com>, "Michael A. Terrell" <mike.terrell@earthlink.net> wrote:
"Paul E. Schoen" wrote:
"William Sommerwerck" <grizzledgeezer@comcast.net> wrote in message
news:i32gbp$hnm$1@news.eternal-september.org...
I remember having problems with leakage on a board that
stored voltages in polystyrene capacitors using CMOS
switches and op-amps, but the voltage would bleed off too
quickly to be useful as a "memory". We tried all sorts of
flux removers and it still didn't work well enough. But I had
had an idea that it might be ionic contaminants such as
salt, so I took a board into the mens room and scrubbed
it with hand soap and flushed it with hot water. Then I dried
it with a heat gun, and "voila" it worked like a champ rather
than a chump.
Interesting observation.
Question... Wouldn't distilled water alone flush off ionic contaminants?
Probably. But there may be some sort of oily residue that will be removed by
the detergent. And hot water from the tap is much cheaper. It may be good to
do a final rinse with distilled or deionized water. I have heard that some
people stack their boards in a dishwasher. But my method works for me and is
is very practical for small quantities.
We used a citrus based cleaner in a commercial board washing machine
at Microdyne. It was a modified stainless steel industrial dishwasher
with a separate solvent tank and fresh water wash. Then the boards went
into a board drying oven for 12 to 24 hours. This was for small runs of
boards stuffed and reflow soldered in house.
I noticed citrus based degreasers leave behind oil.
Thats a bad thing when you really want to paint something thinking
it will work. Bad for tape sticking also.
I think I allready mentioned mens room board cleaning.