Rejuvenation catalyst for Petrobond (R)

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SUMMARY

The rejuvenation catalyst for Petrobond (R) foundry sand primarily includes propylene carbonate and a mixture of 90% methanol and 10% water, both of which are effective in restoring the sand's usability after oil is burned out during the casting process. Other potential catalysts mentioned are isopropyl alcohol and propylene glycol. The sand is utilized in casting various items, from small tools to large components like a 4,200-pound brass ship propeller. Proper handling and disposal of used sand are crucial to comply with environmental regulations, ensuring it is not classified as hazardous waste.

PREREQUISITES
  • Understanding of foundry processes and materials
  • Knowledge of chemical catalysts and their applications
  • Familiarity with environmental regulations regarding waste disposal
  • Basic principles of sand reclamation and rejuvenation
NEXT STEPS
  • Research the properties and applications of propylene carbonate in foundry processes
  • Learn about the environmental regulations related to foundry waste management
  • Investigate the effectiveness of various catalysts in sand rejuvenation
  • Explore the casting process and its impact on foundry sand properties
USEFUL FOR

This discussion is beneficial for foundry engineers, materials scientists, and environmental compliance officers involved in metal casting and sand reclamation processes.

Flyboy
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I was wondering if you guys could help me out here. I would like to know what the rejuvenation catalyst for Petrobond (R) foundry sand is, if there is one at all.:confused: If you guys could get me the answer before the end of the day, I would appreciate it. :wink:
 
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I'm not sure why my first instinct is to say 'Kitty Litter', but it's probably wrong.
 
Danger, you actually got one of the parts of the foundry sand correct. Cat litter has bentonite clay in it, as does foundry sand. Pretty close. I think it may be oil, but I'm not sure.
 
Geez, I was just trying to live up to my medal. :redface:

Perhaps if you tell me what the sand is used for and what state it needs to be 'rejuvenated' from, I can check around. I was going on the assumption that it was for casting parts, but I thought that it would be fused after that.
 
The sand is used to cast items ranging from hacksaw handles in metalshop classes to a 4,200 pound brass ship propellor. the problem is that the sand that touches the metal has the oil burned out of it. the oil comes out as smoke, leaving burnt sand behind. to make it useable again, you have to add oil. I found a couple of different catalysts. one catalyst turned out to be propylene carbonate. others were isopropyl alchohol, a mix of 90% methanol and 10% water, and propylene glycol (coolant/antifreeze). they say that the propylene carbonate or methanol/water mix is best. thanks guys.
 
I would have to run over to our foundry to check. I can't guarantee I can get back to you before tomorrow though.
 
Well, that's kinda neat, Flyboy. I never knew that there was anything mixed with the sand, and couldn't figure out how it held its shape. Thanks for the enlightenment.
 
Flyboy said:
It's OK. I got my information from a site about a home foundry. the address is http://groups.yahoo.com/group/hobbicast/message/33936. :approve:
Reclimation or rejuvination is only good for so long. As a side note to consider, when we ship our used sand to the dump, because of the additives, we have to ensure that the waste sand is not considered hazardous waste. It never is, but environmental regs require the testing. Just as an FYI.

Glad you found your info.
 
  • #10
So does the casting process burn the oil right into the sand, as in bonding a carbon layer to it, or does the residue just get washed out in the reclaimation?
 
  • #11
I just remembered why Kitty Litter came to mind as a sand substitute, and it has nothing to do with industrial processes. It was about using it under your tires when you're stuck in winter. :redface:
 
  • #12
Danger said:
I just remembered why Kitty Litter came to mind as a sand substitute, and it has nothing to do with industrial processes. It was about using it under your tires when you're stuck in winter. :redface:


Or using it to absorb engine oil spilt on your garage floor, making it easy to sweep up.
 
  • #13
Quite so, Mr. Nog. Also, an antifreeze spill, which will kill your cat if he licks it, is well taken care of by litter.
 

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