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Water And Sulfur In Lpg

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#1 Alawi


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Posted 01 May 2007 - 11:43 PM

Hello every one,

I need some information regarding a test used to indicate the concentration of sulfur in LPG, the test is called "The doctor test" , we currently use this test as a fist check test to roughly sea weather there is an over limit of sulfur in our LPG product from our merox LPG treating unit.
There has been some discussion about what type of sulfur does this test indicate , total sulfur, H2S, mercaptens. Also what are the sulfur concentration limits it can correctly predict within?
If any one uses this type of test in there refinery or plant or has any further information and elaboration on this test please come back to me.



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Posted 03 August 2007 - 07:10 AM

Hi Alawi

If the doctor test become coloured (yellow) we have to check the concentration of mercaptens before selling the product, so I guess the test indicates mercaptens.


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