Search results

  1. M

    Hydrogen seperation from water

    The Wiki article describes PSA pretty well- it somewhat fits into the first method below for semipermeable membrane separation, but needs a driving force to release the adsorped molecules from the pores (usually atomic dimensioned channels in Xeolites). -semi-permeable membranes rely on pores...
  2. M

    Sheets of uranium?

    Reading this post's question of "home methods" in relation to radioactive materials, reminded me of an exercise that a senior scientist did with us in an industrial setting to sink home the dangers of radioactivity. A piece of paper, and a pen were handed to a gathering of us and each was told...
  3. M

    Binders in SSP fertilizer

    I can understand if the reactor is a tube or other reactor than a tank; plugging with clay would be very bad indeed.... I thought however, that the fertilizer xtal slurry might be able to withstand the introduction of a clay slurry that is very dilute and held suspended with surfactant. The...
  4. M

    How to calculate flash point of mixture?

    One thing that makes this harder is whether the mixture will be 100% soluble or not- a two phase system is a strong possibility if even a slight amount of H2O contacts this, and then the vapor pressure exerted by the alcohol phase will rule the flashpoint as if the other was not even there. If...
  5. M

    Binders in SSP fertilizer

    I am sure you will find literature from bentonite producers, and it can be added as a slurry to bind or act as a final coat. It should also become somewhat hydrophobic if a small amount of biodegradable surfactant is used in formulating. Look in patent literature with appropriate boolean search...
  6. M

    UV degradation of PVC

    I have been looking at surface modification of PVC and other plastics to chemically alter their hydrophobicity and possibly allow coating with an inert and bio-passive coating- there is some literature that is pertinent to your question, as it covers free radical aqueous attack on the polymer...
  7. M

    Safely and cost effective chemical to raise specfic gravity of water

    I found that Occidental Chemical (OXY) has some good PDF links to properties of solutions and handling info at Their LIQUIDOW is a technical grade water solution of 10-12 #/US gal calcium chloride.
  8. M

    Safely and cost effective chemical to raise specfic gravity of water

    I would use cheap calcium chloride (CaCl2) since you can make a solution up to 40-60% easily without crystallization. It is commonly sold as a deicer as prills, or as a concentrated solution. It will need makeup if your separation is not a yes or no type of differentiation; the solution will...