Heinrich Carroll

On February 13, 1834, German chemist Heinrich Carro was born, was the foundation of the late nineteenth century, the leading figure of the German dye industry.

character brief introduction

Heinrich Caro was born in Poznan, Poland, and was brought to Germany by his parents to become a German citizen from an early age. After finishing secondary school in Berlin, he entered what was then the Technical College. From 1852 to 1855, he learned the dyeing method and printing technique of textiles there. After graduating from technical college, I worked in a small dye factory. At that time, there was a superstition that it was impossible to dye in winter in Germany, but this was not the case in England, so he went to England to study. In 1859, when he was twenty-five years old, he arrived in Manchester, England. He worked and studied part-time, and spent part of his time doing dye research at the then Del Company in England. There, he discovered that Pachen's synthetic aniline violet could be used in a simple way to replace the original expensive medicine, and he applied for patents for several new dyes. For example, Bismark brown, 2, 4-dinitronaphthol (Martius yellow), aniline yellow, etc. are all patents he applied for in the UK. He left England in 1866 at the age of thirty-two and returned to Germany. He re-entered the University of Heidelberg, and after finishing his doctorate, he joined BASF, a German dye company. He worked here until he retired. During the thirty-two years from 1868 to 1899, he was first the chief researcher of this company, and later was promoted to the chief engineer. Here, he completed many dyes that are still famous today, such as naphthol yellow, synthetic alizarin, methylene blue, non-fading red, auramine and so on. He invented a total of twenty-six dyes that are still used today. He also discovered a strong oxidizing agent, namely persulfuric acid H2S2O4, named Caro acid. He spent most of his life studying dyes and wrote several books. Among them, there are two books that are still of reference value: one was written in 1892, and the title is "The Development of Coal Tar Dye Industry"; The other is "The Development of the German Chemical Industry" written in 1904. Both books are important materials to describe the early development history of BASF undefined. On September 11, 1910, Carlo died of illness at the age of seventy-six.

Caroic acid

Peroxysulfuric acid, also known as Carol acid, is mainly used for disinfection, such as swimming pool water or dentures; An alkali metal salt of peroxymonosulfuric acid is used for delignification; Ammonium salts, sodium salts and potassium salts of peroxymonosulfuric acid are used in polymerization initiators, etchants, soil conditioners in the plastics industry, and for decolorizing and deodorizing oil; Potassium peroxymonosulfate is widely used as an oxidant.