Which processes can be used to extract naphthalene from the naphthalene fraction, a byproduct of ethylene tar? Which factories in China are doing this?

Naphthalene in ethylene tar can be extracted through processes such as reforming and naphthalene dehydrogenation. In the reformation process, naphthalene can be separated out along with other cycloalkanes and alicyclic hydrocarbons. In the naphthalene dehydrogenation process, naphthalene can be dehydrogenated into styrene under the action of a catalyst, and then naphthalene can be obtained through separation and purification. Currently, there are many manufacturers in China that extract naphthalene from ethylene tar, including Wanhua Chemical, Shanghai Jinxing Chemical, Shantou Yingtong Petrochemical, and others. These companies all have their own naphthalene extraction processes and production lines, offer stable product quality, and hold a high market share. -

Consult a metallurgical design institute; the processes for extracting naphthalene and phenol from tar are well-developed in China, and there are many manufacturers involved in this field.

Ningbo Zhenhai Taina Chemical Co., Ltd

Naphthalene in ethylene tar is an important chemical that can be used to produce various organic compounds. There are two main processes for extracting naphthalene from ethylene tar: 1. Distillation method – Ethylene tar is distilled, and at 200–220°C, naphthalene sublimes and condenses into a solid state, which can then be collected and purified. 2. Solvent extraction method: Ethylene tar is mixed with one or more solvents, the mixture is cooled to a certain temperature to extract naphthalene from it, and then the compound is purified through distillation or other methods. In China, some large coal chemical enterprises such as Shanxi Yangquan Coal Chemical Group and Shanxi Coking Coal Group are at the forefront in the extraction and development of naphthalene. In addition, there are also some small and medium-sized manufacturers involved in the extraction and production of naphthalene. .

1. Distillation method: Ethylene tar is distilled; naphthalene sublimes at 200–220°C and then condenses into a solid state, allowing it to be purified through collection and separation. 2. Solvent extraction method: Ethylene tar is mixed with one or more solvents, the mixture is cooled to a certain temperature to extract naphthalene from it, and then the compound is purified through distillation or other methods.