General Discussion

ProfessorGAC

(65,010 posts)

18. Back In The 80s...

Thu Nov 12, 2020, 09:55 PM

Nov 2020

...I actually worked on some metathesis reaction, in the other direction. Replacing sodium with calcium or magnesium, in a system where the organic anion was fragile.
Never even got as far as scale up, because our preliminary cost model suggested it would be really expensive.
Getting simple sodium salts to convert to calcium ions is hard. It's really slow going that way, but 2.5 orders of magnitude faster (at least) displacing weak cations with stronger ones. That could do a lot of damage to concrete in a big hurry.
Then, the heat of solution would increase that rate of metathetic exchange.
I worked on some covalent metathesis reactions that were more successful.

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Major north/south Ohio river bridge closed at Cincinnati, I-71 and I-75 corridor. [View all] KY_EnviroGuy Nov 2020 OP

Say, whatever did happen to that darn infrastructure week? Dagstead Bumwood Nov 2020 #1

I think "infrastructure week" MyOwnPeace Nov 2020 #3

Thanks for this man LSFL Nov 2020 #2

You made my day! Glad it helped. Just saw the Gov's email and said "holy shit'. KY_EnviroGuy Nov 2020 #6

I know LSFL Nov 2020 #8

It is the worst bridge in the country dsc Nov 2020 #4

471 bridge is a mile east, leads to 275, and thence to 75 or 71 maxsolomon Nov 2020 #31

This message was self-deleted by its author Chin music Nov 2020 #5

Yep, double-decker carrying I-75 and I-71 right over the Ohio into downtown Cincinnati. KY_EnviroGuy Nov 2020 #9

Holeee shiiiit. That's indeed a very busy bridge. Buckeye_Democrat Nov 2020 #7

The Potassium Hydroxide wouldn't be a problem unless the containment opened Blue_true Nov 2020 #10

It's An Old Dominion Truck ProfessorGAC Nov 2020 #12

I was assuming that the KOH was solid. But liquid would be even worse in a way. Blue_true Nov 2020 #13

Back In The 80s... ProfessorGAC Nov 2020 #18

KOH is a very strong reactive base BumRushDaShow Nov 2020 #21

From the photos below, appears to be a smaller truck carrying drums... KY_EnviroGuy Nov 2020 #19

Highly Alkaline Substances Should Not... ProfessorGAC Nov 2020 #23

There's a lot of water in the Ohio Klaralven Nov 2020 #24

It Would ProfessorGAC Nov 2020 #27

It was bad enough that I-75 was always "under construction" along the length for years. BumRushDaShow Nov 2020 #11

Thanks for those pix. I can see why they're concerned about structural damage.... KY_EnviroGuy Nov 2020 #14

I remember years ago walking across one of the adjacent bridges into Covington and back BumRushDaShow Nov 2020 #15

That's dedication to a hobby. During my travels, I collected the little state thimbles.... KY_EnviroGuy Nov 2020 #16

On another trip to Cincinnaiti BumRushDaShow Nov 2020 #20

I think I have been over that bridge many times in my way from COV to our smirkymonkey Nov 2020 #17

No, SM I'm in the Louisville area but prior to retirement.... KY_EnviroGuy Nov 2020 #22

Good for you KY_EnviroGuy for getting involved (eventually) smirkymonkey Nov 2020 #25

Wow. Trying not to be nosy SM,but what area of commerce do you work in.... KY_EnviroGuy Nov 2020 #30

I live north of the bridge about 30 miles. JesterCS Nov 2020 #26

Last I heard the heat was so intense it changed the mechanical properties of the steel. Norbert Nov 2020 #28

Thanks. Here's an update I found on that subject. KY_EnviroGuy Nov 2020 #29