You can't say that. Waste oil recycling is illegal, but the process of waste oil recycling is very primitive and does not require specially designed equipment. It is legal to extract gutter oil from swill and animal and vegetable oils, and the equipment is primitive, just a big iron can, which is burned. This is because gutter oil can be used as mineral processing agent, animal feed oil, candle, fuel and so on.

However, it is illegal to use waste oil to refine edible oil. They usually buy waste oil for other reasons and process it into edible oil. The usual steps are steam melting-cone tank dewatering-decoloring sand filtration-adding additives (most of them don't have this step)-selling. It can be said that many industrial production equipment can be used. Therefore, it is impossible for the law to prohibit the sale of waste oil refining and similar equipment, and only severely punish the recycling of waste oil as edible oil.

Honey, are you satisfied with my answer? If you are satisfied, please adopt me when you see it. Thank you.