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That Methyl Methacrylate Tank

science.org

101–110 of 204 posts

Re: That Methyl Methacrylate Tank

#101

What a disaster and complete failure on the local government in the way they handled this situation. If we ever get hit by an earthquake or other larger disaster, it's safe to assume we're all on our own. Also, as someone affected by this, it has been extremely frustrating getting updates via xitter. Do we really have no other options?

vague post

Re: That Methyl Methacrylate Tank

#102
post #100

Earlier quoted context omitted.

Note that it doesn’t dry out; it polymerizes, and the reaction is catalyzed by water, which is why cyanoacrylate glues will stick your fingertips together instantly but will not as rapidly stick plastics or metals together.

There are superglue(CA) accelerators sold, is that just a big scam? Because as far as I can tell a spray bottle with water works just as well.

I think Polyolefin Primer (Permabond POP) is magical in what it can superglue. Beautiful chemistry allowing something like Teflon or steel to be glued. https://www.youtube.com/watch?v=G9yz8OqThJk

Re: That Methyl Methacrylate Tank

#103

Meanwhile in Washington, an unknown number of people where killed today in a paper mill “white liquor” explosion today…: https://www.opb.org/article/2026/05/26/longview-chemical-exp...

And for what, $25.00 bucks an hour? We need to take back production.

Re: That Methyl Methacrylate Tank

#104

Earlier quoted context omitted.

> Why wouldn't there be passive protection systems designed in? Because the US chemical industry has been effectively unregulated for a century and can do whatever it pleases. There's a neutralizing chemical that could have been injected to stop the exothermic reaction in its tracks. They didn't have it on site. A "response team" (likely a contractor that responds to chemical emergencies) did, but by the time they sh…

In California, this is absolutely not the case. Regulations are strict, chemical emissions are heavily restricted and proper disposal of chemicals via specialized companies at great expense. Chemical companies have no need of formulating new versions because everything causes cancer under prop 65. They absolutely have numerous permits for chemicals, your claim that they don't denies reality. This case probably fell t…

The plant was built after the houses but likely well before we had anything resembling modern safety regulations regarding such things. It was presumably grandfathered in for no reason other than that arbitrarily putting someone out of business after the fact is generally frowned upon. https://news.ycombinator.com/item?id=48254291

That company (GKN Aerospace) was recently fined $900k by California for various violations dating to 2020 (including instances of incomplete records and missing permits). To be clear my intent isn't to single them out. I cynically assume at least some amount of that behavior to be par for the course with US chemical companies.

Re: That Methyl Methacrylate Tank

#105
post #86

Earlier quoted context omitted.

Typically BLEVE is used in a petrochemical context, where the hot "boiling liquid, expanding vapor" ignites on contact with oxygen.

A BLEVE does not need oxygen to become an explosion. The explosion occurs with the rupture of a tank (that has been heated, increasing the internal pressure and thus increasing the boiling point of the liquid inside, so that it remains liquid). This causes a loss of rapid loss of pressure, which in turn rapidly decreases the boiling point of the liquid, thus causing a sizable part of the liquid to almost immediately…

It doesn't need it but it makes it that much more destructive. Your propane example is such a case - as the hot cloud expands explosively it burns on contact with new oxygen and the heat serves to further perpetuate the process. An overheated tank of propane provides an illustration of the principle on which thermobaric warheads are based.

Re: That Methyl Methacrylate Tank

#106

> The immediate danger seems to abated, fortunately, The "it will explode leveling a couple city blocks" danger seems to be abated, but instead it's spraying an insanely toxic chemical out into the open, which will likely have health repercussions for residents for decades? Thousands of gallons of toxic chemicals don't just disappear.

On the plus side, it's a chemical that was discovered more than a century ago so scientists have accumulated a lot of knowledge about it. So far no studies were able to link it to cancer. It also doesn't significantly build up in the body over time (like heavy metals do). It's 3x heavier than air so it shouldn't spread too far away. The main issue is they want to try to keep it from getting into storm drains or into…

You've got the right idea with the LD50 but the catch is that if it ignites it produces things that are acutely toxic in relatively small quantities.

Re: That Methyl Methacrylate Tank

#108
post #78

Earlier quoted context omitted.

MMA can apparently cause some issues that are more subtle than death. I would MUCH rather eat 1g of vitamin C than 1g of MMA. Also, vitamin C is not volatile, so there is no risk of inhaling it as a gas.

Sure it can. So can Vitamin C though. The overall point remains the same: the toxicity, both short and long term, of MMA, is comparable to lots of everyday substances that are both commonly eaten and inhaled. It just isn't that toxic as far as chemicals go. That doesn't mean it would be like great for you but calling it "highly toxic" is tremendously overblown and doesnt serve anyone well to claim. Let's save the hig…

It produces highly toxic byproducts when it burns thus the exposure concerns.

Re: That Methyl Methacrylate Tank

#109
post #73

Earlier quoted context omitted.

I've been told this is a cheap way to fix small windshield cracks. Never tried it but sounds like it would work for the small spider sized and shaped cracks from small rock impacts.

This is basically what the glass repair kits sold at auto parts stores are. (They also include a suction cup with syringe, to vacuum any air bubbles out.)

And, bringing this topic full circle, the chemical in those kits is methyl methacrylate!

Re: That Methyl Methacrylate Tank

#110
post #4

Why wouldn't there be passive protection systems designed in? After a big earthquake you don't want to have to also deal with other emergencies (à la Fukushima). Aside: One good side-effect of the 2011 Tōhoku earthquake being so horrific is that it stopped the self-obsessed whinging in my city (Christchurch was still trying to recover from an earthquake).

> Why wouldn't there be passive protection systems designed in? Because the US chemical industry has been effectively unregulated for a century and can do whatever it pleases. There's a neutralizing chemical that could have been injected to stop the exothermic reaction in its tracks. They didn't have it on site. A "response team" (likely a contractor that responds to chemical emergencies) did, but by the time they sh…

But then no one would build Jurassic Park. And man, I want to pet Raptors and take selfies with T-Rex you know. Its a conundrum.
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