How To Extract Synthetic Camphor

Camphor oil is mainly composed of various terpenoids. Generally, the refined camphor and various essential oils (such as eucalyptus oil, linalool, pine oil, safrole) and by-products (such as white camphor oil, red camphor oil, blue camphor oil) are prepared by multi-tower continuous decompression distillation, combined with freezing and sublimation processes.
Camphor synthesis: A-pinene obtained by decompression fractionation of high grade turpentine was isoformed into camphene by metatainic acid catalyst. The pure camphene obtained by fractionation (freezing point above 44℃) was esterified to isobornyl acetate by glacial acetic acid etc. Fractional distillation and purification to the ester content of more than 95%, with about 45% concentration of sodium hydroxide aqueous solution and an appropriate amount of xylene pressure saponification, after the reaction was completed, an appropriate amount of xylene was added as a solvent, standing stratification, separation of sodium acetate, water to neutral, isobornyl xylene solution was obtained. Using basic ketone [CuCO3·Cu(OH)2] as catalyst, the isobornol was dehydrogenated at 180℃ and xylene was steamed. Finally, the synthetic camphor was prepared by blowing at 212℃. The specifications of synthetic camphor in China are divided into two categories: industrial grade and medicinal grade. Industrial grade camphor powder specifications for melting point above 165℃, brain content of more than 96% : pharmaceutical grade can meet the national pharmacopoeia specifications. Uses: camphor is used in the manufacture of celluloid and photographic film; Used as a stabilizer in the manufacture of smokeless powder; In medicine, it is used to prepare central nervous stimulants (such as ten drops of water, human Dan) and compound camphor tincture. It can prevent insects, corrosion, deodorization, and has a sweet aroma. It is a treasure of protection for clothing, books, specimens and archives. Natural camphor has high purity and large specific curl, so it is difficult to be completely replaced by synthetic camphor for special uses in medicine and other fields.
The specific steps are as follows:
1. Raw material preparation: The main raw material for the synthesis of camphor is pinene, which is usually extracted from turpentine. Pinene was purified to obtain high quality starting material.
2. Isomerization: The purified pinene was isomerized to convert it into isobornyl acetate. This step involves rearranging the pinene's molecular structure to produce the desired compounds.

3. Hydrolysis: isoborneol is hydrolyzed by acidic or alkaline catalysts and decomposed into isoborneol. This process involves adding water to the compound to form the desired product.

4. Oxidation: Isobornyl alcohol is oxidized, using nitric acid or chromic acid and other oxidants. This process chemically converts isobornyl alcohol into camphor, resulting in the formation of camphor powder.

5. Purification: The synthetic camphor is purified to remove impurities and unwanted by-products. Techniques such as recrystallization or sublimation can be used to obtain pure camphor powder.

6. Drying and crushing: The pure camphor is dried to remove the remaining water. It is then ground or ground into a fine powder to achieve the desired particle size.

7. Packaging and storage: Put the camphor powder into an appropriate container and store it sealed. It is important to store synthetic camphor powder in a cool, dry place to maintain its quality.