Nicolas Leblanc (December 6, 1742 – January 16, 1806) was a French

chemist A chemist (from Greek ''chēm(ía)'' alchemy; replacing ''chymist'' from Medieval Latin ''alchemist'') is a scientist trained in the study of chemistry. Chemists study the composition of matter and its properties. Chemists carefully describe th ...

and

surgeon In modern medicine, a surgeon is a medical professional who performs surgery. Although there are different traditions in different times and places, a modern surgeon usually is also a licensed physician or received the same medical training as ...

who discovered how to manufacture

soda ash Sodium carbonate, , (also known as washing soda, soda ash and soda crystals) is the inorganic compound with the formula Na2CO3 and its various hydrates. All forms are white, odourless, water-soluble salts that yield moderately alkaline solutions ...

from

common salt Salt is a mineral composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of Salt (chemistry), salts; salt in the form of a natural crystallinity, crystalline mineral is known as rock salt or halite. ...

Earlier days

Leblanc was born in Ivoy le Pré,

Cher Cher (; born Cherilyn Sarkisian; May 20, 1946) is an American singer, actress and television personality. Often referred to by the media as the Honorific nicknames in popular music, "Goddess of Pop", she has been described as embodying female ...

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...

on 6 December 1742. His father, a minor official at an iron works, died in 1751. Leblanc was sent to

Bourges Bourges () is a commune in central France on the river Yèvre. It is the capital of the department of Cher, and also was the capital city of the former province of Berry. History The name of the commune derives either from the Bituriges, ...

to live with Dr. Bien, a close family friend. Under the influence of his guardian, Leblanc developed an interest in

medicine Medicine is the science and practice of caring for a patient, managing the diagnosis, prognosis, prevention, treatment, palliation of their injury or disease, and promoting their health. Medicine encompasses a variety of health care pr ...

. When Bien died in 1759, Leblanc enrolled at the École de Chirurgie (College of Surgeons) in Paris to study medicine. Graduating with a master's degree in surgery, Leblanc opened a medical practice. He married in 1776, and the couple's first child followed three years later. Unable to provide adequately for his family on the medical fees he obtained from his patients, Leblanc in 1780 accepted a position as the private physician to the household of the Louis Philip II, Duke of Orléans.

The
Leblanc process The Leblanc process (pronounced leh-blaank) was an early industrial process for making ''soda ash'' (sodium carbonate) used throughout the 19th century, named after its inventor, Nicolas Leblanc. It involved two stages: making sodium sulfate fr ...

In 1775, the

French Academy of Sciences The French Academy of Sciences (French: ''Académie des sciences'') is a learned society, founded in 1666 by Louis XIV at the suggestion of Jean-Baptiste Colbert, to encourage and protect the spirit of French scientific research. It was at ...

offered a prize for a process whereby

could be produced from salt. The French Academy wanted to promote the production of much-needed

sodium carbonate Sodium carbonate, , (also known as washing soda, soda ash and soda crystals) is the inorganic compound with the formula Na2CO3 and its various hydrates. All forms are white, odourless, water-soluble salts that yield moderately alkaline solutions ...

from inexpensive

sodium chloride Sodium chloride , commonly known as salt (although sea salt also contains other chemical salts), is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chloride ions. With molar masses of 22.99 and 35. ...

. By 1791, Nicolas Leblanc had succeeded in producing sodium carbonate from salt by a 2-step process. In the first step, sodium chloride is mixed with concentrated

sulfuric acid Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid ( Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with the molecular fo ...

at temperatures of 800-900 ° C;

hydrogen chloride The compound hydrogen chloride has the chemical formula and as such is a hydrogen halide. At room temperature, it is a colourless gas, which forms white fumes of hydrochloric acid upon contact with atmospheric water vapor. Hydrogen chlorid ...

gas is evolved, leaving solid sodium sulfate. In the second step, the sodium sulfate is crushed, mixed with

charcoal Charcoal is a lightweight black carbon residue produced by strongly heating wood (or other animal and plant materials) in minimal oxygen to remove all water and volatile constituents. In the traditional version of this pyrolysis process, ...

and

limestone Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms w ...

and again heated in a furnace. The prize was awarded to Nicolas Leblanc for a process which used sea salt and sulfuric acid as the

raw material A raw material, also known as a feedstock, unprocessed material, or primary commodity, is a basic material that is used to produce goods, finished goods, energy, or intermediate materials that are feedstock for future finished products. As feeds ...

s. Later a plant (of his own) was in operation producing 320

ton Ton is the name of any one of several units of measure. It has a long history and has acquired several meanings and uses. Mainly it describes units of weight. Confusion can arise because ''ton'' can mean * the long ton, which is 2,240 pounds ...

s of soda ash per year. The process, however, is now obsolete and is superseded by the extremely profitable and convenient

Solvay process The Solvay process or ammonia-soda process is the major industrial process for the production of sodium carbonate (soda ash, Na2CO3). The ammonia-soda process was developed into its modern form by the Belgian chemist Ernest Solvay during the 1860s ...

Final days

Two years later the plant was confiscated by the French revolutionary government, which refused to pay him the prize money he had earned ten years earlier. In 1802

Napoleon Napoleon Bonaparte ; it, Napoleone Bonaparte, ; co, Napulione Buonaparte. (born Napoleone Buonaparte; 15 August 1769 – 5 May 1821), later known by his regnal name Napoleon I, was a French military commander and political leader wh ...

returned the plant (but not the prize) to him, but by then Leblanc could not afford to run it. He committed

suicide Suicide is the act of intentionally causing one's own death. Mental disorders (including depression, bipolar disorder, schizophrenia, personality disorders, anxiety disorders), physical disorders (such as chronic fatigue syndrome), and ...

by a gunshot to the head in 1806.

Legacy

William Losh visited Paris to study Leblanc's process. In 1807, Losh, Wilson and Bell opened the first alkali works in England that used the Leblanc process, at

Walker, Newcastle upon Tyne Walker is a residential suburb and electoral ward in the south-east of Newcastle upon Tyne, England. History The place-name 'Walker' is first attested in 1242, where it appears as ''Waucre''. This means 'wall-carr', that is to say, 'the marsh b ...

.Grace's Guide: Walker Ironworks
/ref>

Sources

Bibliography

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References

{{DEFAULTSORT:Leblanc, Nicolas Leblanc, Nicholas Leblanc, Nicholas Leblanc, Nicholas People of the Industrial Revolution Suicides by firearm in France 1800s suicides People from Cher (department)