Edible oil is an indispensable component in our daily diet, and solvent extraction, as an efficient way to extract oil, is widely used in modern industrial production. However, this method also faces some difficulties and challenges in actual operation, which need our in-depth discussion and solution.

Firstly, the choice of solvent is a key issue. Solvents used for extraction should have good solubility, be safe, non-toxic and meet food-grade standards. However, many efficient solvents may have toxicity or residue problems, which bring hidden dangers to food safety. Therefore, how to find efficient and safe solvents has become an important research direction in the industry.

Secondly, the control of solvent residue is another difficulty. In the process of solvent extraction, some solvents may remain in the final product. If not handled properly, these residues may have adverse effects on human health. Therefore, in the production process, it is necessary to adopt efficient desolventizing technology, such as evaporation or vacuum drying, to ensure that the solvent is completely volatilized. However, these technologies are often costly and have strict requirements on equipment and operating conditions.

Besides, environmental protection is also a big challenge for solvent extraction. Many traditional solvents are polluting to the environment, which may cause air pollution or other environmental problems after volatilization. Therefore, how to develop environmentally friendly solvents and optimize the process to reduce the impact on the environment is an important issue in the current industry development.

Finally, process optimization and cost control can not be ignored. In order to improve the production efficiency and reduce the cost, it is necessary to continuously optimize the extraction process, including the precise control of parameters such as temperature, pressure and time. At the same time, it is necessary to develop more energy-saving and efficient equipment to meet the market demand for low-cost and high-quality edible oil.

Generally speaking, although the solvent extraction technology of edible oil has the advantages of high efficiency and controllability, it still faces many challenges in solvent selection, safety, environmental protection and cost control. In the future, with the progress of science and technology and in-depth research, these problems are expected to be better solved, thus promoting the edible oil industry to develop in a safer, more environmentally friendly and more efficient direction.