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Recent content by DougW

  1. DougW

    H2S+NaOH ==> NaHS + H20

    Thanks Kevin for the submittal. What I'm really looking for is the heat generated from this reaction. Like for every lb of H2S absorbed into 50% NaOH ==> x,xxx BTU of heat is generated.
  2. DougW

    NaHS verses Elemental Sulfur production for H2S scrubbing

    I am a small user of NaHS so I understand this business a little bit. NaHS in the US is made as a by-product from scrubbing H2S. TDC-home.com controls most of the NaHS produced. Akzo makes NaHS as a by-product of CS2. There are few other players. It is used by paper mills, mining and...
  3. DougW

    H2S+NaOH ==> NaHS + H20

    closed thread798-141763 discussed making NaHS from H2S. I need to know the heat of solution. When the H2S is absorbed into the NaOH, how much heat is released? You would think this would be readily available, but I can't find it.
  4. DougW

    Valve selection for BF3 service?

    I used to work with BF3. What a nasty chemical! Be careful with it. Allied Signal was my supplier back then. (Honeywell now??). They recommended the following: On/Off valves: Needle or Globe Type. Aluminum Silicon bronze or Stainless Steel. Throttling Valve: Globe valves with Hastelloy...
  5. DougW

    Need Recommendation for vessel holding 28% Sulfuric Acid

    Thanks to everyone's useful comments. I have purchased a surplus (used) 3000 gallon Alloy 20 vessel for this service. Last owned by Rohm & Haas Deer Park, Texas. 100 psi design, lethal service. It was $13,000 delivered. I did check out several coating (Plasite, etc) and they did seem like...
  6. DougW

    Chemical resisitive coating for steel

    A vendor recommended Plasite for lining steel tanks exposed to weak sulfuric. They have a web page. I see lots of rail cars using this coating.
  7. DougW

    Need Recommendation for vessel holding 28% Sulfuric Acid

    I have an application requiring a 3000 gallon batch neutralizer that starts with 28% sulfuric acid in water. The acid is slowly consumed to form a sodium sulfate solution. Conditions in the vessel are 50 psi pressure, 130 degrees Fahrenheit (55 C). I am considering an Alloy 20 pressure vessel...
  8. DougW

    Mesitylene, meta-diethylbenzene, isodurene

    Can make higher purity, but would require additional purification step. How much purity would be required to market these aromatics? I was impressed that the isomers were 99% meta coming off.
  9. DougW

    Chemicals for removal of Hydrogen sulphide in Fuel oil

    The company I work for sells nickel sulfurguards that remove H2S, thiophene and mercaptans from organics. They work very well and are used all over the world. If you have a real application and want to speak with a salesman, let me know. dwene@eurecat.com
  10. DougW

    Mesitylene, meta-diethylbenzene, isodurene

    Have a pilot scale process that can be set up to make Mesitylene (1,3,5 trimethylbenzene), meta-diethylbenzene (1,3 diethylbenzene), or isodurene(tetramethylbenzene). Process makes these unique aromatic chemicals in high purity (>99%). Does anyone know of any high value / high volume use for...

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