Production process of high-quality carbazol and anthracene

A production process and high-quality technology, applied in chemical instruments and methods, purification/separation of hydrocarbons, hydrocarbons, etc., can solve problems such as small production scale, large solvent consumption, low product yield and product quality

Inactive Publication Date: 2008-11-12
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has the following disadvantages: 1) when extracting phenanthrene, a certain amount of anthracene and carbazole are taken out, which reduces the yield of anthracene and carbazole; 2) this method improves product quality by increasing the number of times of washing , product quality and yield are a pair of contradictions
Therefore, the production scale of this method is small, the solvent consumption is large, and the product

Method used

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  • Production process of high-quality carbazol and anthracene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: Crude anthracene processing capacity 1000kg / hr produces refined carbazole and refined anthracene

[0024]Crude anthracene raw material, which contains 28% of anthracene, 27% of phenanthrene, 14% of carbazole, about 13% of light components in total, and about 18% of derivatives and heavy components. The production device and flow process are shown in Figure 1. The crude anthracene raw material enters the raw material pre-washing tank 01 in an amount of 1000kg / hr for pre-washing. The pre-washing 1# solvent is xylene (mixed xylene, the same below), and xylene and raw material The mass ratio is 2:1, and the washing is carried out at 28°C under normal pressure. After stirring for 10 minutes, the solid-liquid mixture in the raw material washing tank 01 is transported to the automatic centrifuge 02 for solid-liquid separation, and the rotation speed is 6000r / min. The solid phase obtained by separation is the filter residue, and its components are carbazole, anthr...

Embodiment 2

[0026] Embodiment 2: crude anthracene processing capacity 1000kg / hr produces refined carbazole and refined anthracene

[0027] Crude anthracene raw material, which contains 28% of anthracene, 27% of phenanthrene, 14% of carbazole, about 13% of light components in total, and about 18% of derivatives and heavy components. The production equipment and process are shown in Figure 1. The crude anthracene raw material enters the raw material pre-washing tank 01 at a rate of 1000kg / hr for pre-washing. The pre-washing 1# solvent is 200# solvent oil, and the mass ratio of solvent to raw material is 2.5:1 , the washing is carried out at 28°C under normal pressure, and after stirring for 10 minutes, the solid-liquid mixture in the raw material washing tank 01 is transported to the automatic centrifuge 02 for solid-liquid separation at a speed of 5500r / min, and the solid phase obtained from the separation is the filter residue , the components are carbazole, anthracene, a small amount of ...

Embodiment 3

[0029] Embodiment 3: crude anthracene processing capacity 1100kg / hr produces refined carbazole and refined anthracene

[0030] The crude anthracene raw material contains 26% of anthracene, 28% of phenanthrene, 12% of carbazole, about 12% of light components in total, and about 24% of derivatives and heavy components. The production device and process are shown in Figure 1. The crude anthracene raw material enters the raw material pre-washing tank 01 at an amount of 1100kg / hr for pre-washing. The pre-washing 1# solvent is trimethylbenzene, and the mass ratio of the solvent to the raw material is 2.5:1. It is carried out under normal pressure at 28°C. After stirring for 10 minutes, the solid-liquid mixture in the raw material washing tank 01 is transported to the automatic centrifuge 02 for solid-liquid separation at a speed of 6500r / min. The solid phase obtained from the separation is the filter residue. It is divided into carbazole, anthracene, a small amount of phenanthrene, ...

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Abstract

The present invention discloses a manufacture process for high quality carbazole and anthracene. The method is to wash the raw material once for removing a number of light constituent, phenanthrene, carbazole derivatives, a small quantity of anthracene and part of heavy constituent, and the loss of the carbazole is less. Afterwards, a vacuum rectification tower with siding withdrawing is adopted for withdrawing the carbazole from the siding at a proper height of the tower. The purity can reach 90 to 95 weight percent, and meanwhile a mixture with the overall purity of the anthracene and phenanthrene being up to more than 90 weight percent is obtained from the top of the tower. The two materials are respectively washed by a No.1 solvent and a No.2 solvent, and the trace impurities contained in the materials are removed. After centrifugalized, fine carbazole and fine anthracene products which are better than the first grade product (carbazole of more than 97 weight percent and fine anthracene of more than 95 weight percent) according to the national standard can be obtained. The solvent wash is operated at a normal temperature, the solvent can be withdrawn for periodic duty, is less in loss quantity, and does not pollute environment. Not only the large-scale successive industrial production of fine carbazole and fine anthracene can be realized easily, but also the process is economic in investment, low in energy dissipation and friendly in environment.

Description

field of invention [0001] The invention relates to a new production process of high-quality carbazole and anthracene. Background technique [0002] Carbazole is an important dye and pigment intermediate, which can be used to synthesize Haichang blue, dyes for carbon paper, etc. Refined carbazole is the basic raw material for the production of permanent violet RL, which is known as the king of purple dyes. In addition, carbazole can also be used as a raw material for synthetic resins, precious metal ore flotation agents, water reducers, stabilizers for lubricating oils and heat transfer oils, surfactants, fluorescent plasticizers, etc. In the 21st century, the application of carbazole in light-conducting and conductive special high-tech materials and biologically active substances (stabilizers for pesticides, plant auxins, anti-inflammatory drugs, and drugs for treating heart disease) is even more eye-catching. [0003] The most important use of anthracene is to obtain anthr...

Claims

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Application Information

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IPC IPC(8): C07D209/84C07C15/28C07C7/04C07C7/00
Inventor 张志炳周政耿皎王明明孟为民王宝荣
Owner NANJING UNIV
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