I. Introduction
In the petrochemical field, the keto-benzol dewaxing and deoiling process, with its unique advantages, occupies an important position in oil refining and wax product production. This article aims to deeply explore the process, characteristics, influencing factors and operation precautions of the keto-benzol dewaxing and deoiling process, in order to provide a reference for the further application and optimization of this process.
II. Process Brief
The keto-benzol dewaxing and deoiling process mainly uses the solubility difference of solvents to separate the waxy and oily substances in the raw materials. Its raw materials are usually waxy crude oil or distillate oil. After being treated by this process, high-quality dewaxed oil and deoiled wax can be obtained. The basic principle of this process is to make the waxy substances crystallize and precipitate in the solvent by controlling the mixing ratio and temperature of the solvent and the raw materials, and then the separation of the waxy and oily substances is achieved through steps such as filtering, evaporation and stripping.
III. Process Flow
1. Crystallization
In the crystallization stage, after the raw materials and solvents are mixed in a certain proportion, they enter the cooling crystallization equipment. As the temperature drops, the waxy substances gradually crystallize and precipitate in the solvent. The selection and design of the crystallization equipment are crucial for improving the crystallization efficiency and product quality.
2. Filtration
The filtration stage aims to separate the crystallized waxy substances from the solvent and the oily substances. There are various types of filtering equipment, such as plate-and-frame filters and rotary drum filters. In the filtering process, parameters such as the filtering speed and pressure need to be controlled to ensure the filtering effect and product quality.
3. Evaporation and stripping
In the evaporation stage, the solvent is separated from the waxy substances by heating to obtain the waxy solvent and dewaxed oil. In the stripping stage, steam is used to vaporize the solvent remaining in the dewaxed oil to further improve the quality of the dewaxed oil. The solvent recovery process is responsible for recovering the solvent generated in the evaporation and stripping processes to reduce the production cost.
4. Deoiling
The deoiling stage mainly processes the deoiled wax. Through operations such as heating and stirring, the oily substances in the waxy substances are evaporated to obtain pure deoiled wax. In the deoiling process, parameters such as temperature and stirring speed need to be strictly controlled to ensure the deoiling effect and product quality.
IV. Process Characteristics
The keto-benzol dewaxing and deoiling process has the advantages of simple operation, high product quality, and stable yield. Compared with other processes, this process has obvious advantages when dealing with high-waxy crude oil and distillate oil. However, this process also has certain limitations, such as large equipment investment and high energy consumption.
V. Influencing Factors
The main factors affecting the keto-benzol dewaxing and deoiling process include temperature, solvent ratio, and stirring speed. In the actual production process, it is necessary to reasonably adjust the process parameters according to the nature of the raw materials and product requirements to optimize the product quality and yield.
VI. Precautions
In the operation process of the keto-benzol dewaxing and deoiling process, it is necessary to strictly abide by the safety operation regulations to ensure the normal operation of the equipment and the safety of personnel. At the same time, it is also necessary to strengthen the equipment maintenance and upkeep work, regularly check the operating status of the equipment, and timely discover and solve potential problems.
VII. Conclusion
The keto-benzol dewaxing and deoiling process has broad application prospects and important strategic significance in the petrochemical field. By deeply understanding the process, characteristics, influencing factors and operation precautions of this process, it can provide strong support for enterprises to achieve efficient, safe and environmentally friendly production. In the future, with the continuous progress of technology and the optimization and upgrading of the process, the keto-benzol dewaxing and deoiling process will play a more important role in the petrochemical field.
