Each of corrosive sublimate and carbolic acid in i gallon of methylated spirits.
In the United Kingdom this "denaturized" alcohol is known as methylated spirit as a distinction from pure alcohol or "spirits of wine."
This spirit ("unmineralized methylated spirit") consisted of 90 parts of alcohol of 60-66 over-proof (9 1 -95% of pure alcohol) and 0 parts of wood-naphtha.
By passing the vapour of this compound through a red-hot tube, it yields the isomeric a0- pyridylpyrrol, the potassium salt of which with methyl iodide gives a substance methylated both in the pyridine and pyrrol nuclei.
It was first enacted in 1855 that methylated spirit, a specific mixture of pure alcohol and wood naphtha, should be duty-free; the present law is to be found in the Customs and Inland Revenue Act of 1890, and the Finance Act (sect.
From 1858 to 1861 methylated spirit was duty-free when it was required for manufacturing processes, and the methylation or "denaturizing" was carried out in accordance with a prescribed process.
During the next three decades (1861-1891) the law was extended, and methylated spirit was duty-free for all purposes except for use as beverages and internal medicinal applications.
For retail purposes the "ordinary" methylated spirit is mixed with ï¿½ 357% of mineral naphtha, which has the effect of rendering it quite undrinkable.
The Finance Act of 1902 allows a manufacturer to obtain a license which permits the use of duty-free alcohol, if he can show that such alcohol is absolutely essential for the success of his business, and that methylated spirit is unsuitable.
This mixture is supplied to manufacturers and corresponds to the British unmineralized methylated spirit; but the regulations are more stringent.
These experiments resulted in the legislation of 1855, when the use of duty-free alcohol mixed with 10% by volume of wood naphtha, known as methylated spirits, was authorized for manufacturing purposes only.
Cyclo-heptene, C 7 H 121 is obtained by the action of alcoholic potash on suberyl iodide; and from cyclo-heptane carboxylic acid, the amide of which by the action of sodium hypobromite is converted into cyclo-heptanamine, which, in its turn, is destructively methylated (R.
The portion distilling at about 200° C. is then methylated by means of methyl alcohol and methyl iodide at loo-i io C., the excess of methyl alcohol removed and the product obtained decolorized by sulphuric acid.
From 1861-91 methylated spirits prepared in this way were allowed to be sold by retail in Great Britain in small quantities for domestic purposes such as cleaning, heating and lighting; but use in large quantities, or in manufacture, was only possible under special authority and under excise supervision.