Why did leader before gasoline before?

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In the past few years, the game has passed the process of gradual refusal to apply a lead connection as an additive to road gasolines.

But how did the idea itself appear to add lead to fuel?

Why is the substance known to its high toxicity used in gasoline worldwide?

What task was the tetraethylsvinets in fuel?

The beginning of the twentieth century was associated with finding solutions to improve the operation of internal combustion engines. The whole world actively passed on gasoline as fuel. But the first of his versions had a low octane number. This indicator denotes a weak resistance to self-burning and explosion.

Because of this, at high compression in the engine, spontaneous detonation took place. Such micro-explosions created a knock in DVS, led to interruptions in its work, especially in cold weather, and rapid wear of the mechanisms.

To increase the octane number of gasoline began to use

There was a problem — what to add to gasoline to significantly raise its octane number?

In 1921, General Motors put this task in front of the researchers group headed by the famous Charles Kettering inventor.

The team began to look for options for additives that would reduce detonation.

Young Engineer Thomas Midhips put forward the idea — to add a dye to gasoline to increase the absorption of heat and accelerate the evaporation of gasoline. Despite the doubtfulness of thought, Midjley decided to check it out. But it was on Saturday evening. Shops were closed, only a pharmacy worked. In it, the only painted substance was

MJLILY added to the Judah of iodine in gasoline — and a miracle! The octane number has increased dramatically. It turned out that the point is not in color, but that the additive changed the properties of gasoline, and he smallerly detonated. Then MJLIL began to be systematically added to gasoline all substances from the Mendeleev table, comparing the results.

General Motors has created a subsidiary company for the production of high-octane gasoline. The problem with detonation was solved, the fuel was suitable even for sensitive aircraft engines. But there was a new complexity. It was already known that lead toxic. But manufacturers decided that this problem can be neglected.

First, in 1921, the car was so little that it was not yet necessary to think about their harm for the environment.

Secondly, the lead in gasoline was minimized. Manufacturers believed that such an insignificant could not damage.

But first began to hurt workers in production, and then — and the inventor himself Thomas Midjley, sweaty lead in the process of experiments. So as not to embarrass consumers, it was decided not to use the word

In 1976, the TPP banned in the United States.

In 2000 in the EU.

And in 2002, Russia joined the ban on lead additives.

But the invention of Thomas Midjley was not quite useless. It is thanks to the TPP in fuel allies could actively use aviation in battles of the Second World War. Until now, this additive is used in racing cars and fuel for aircraft.