Amid the green transformation of the manufacturing industry, fully synthetic cutting fluid has become a new favorite in the industry due to its characteristics of "no mineral oil" and "environmental protection and non-toxicity", widely used in modern mechanical processing workshops. However, an in-depth exploration of its raw material sources reveals that this transparent, water-like cutting fluid is essentially a "child of petroleum", and its environmental value is more reflected in the use and treatment stages.
    The core difference between fully synthetic cutting fluid, emulsion, and semi-synthetic cutting fluid lies in the absence of mineral oil. Its active ingredients are dissolved in water in the form of molecules or ions, forming a stable and homogeneous solution or micellar dispersion. However, its key raw materials are all derived from petrochemicals. Ethylene, propylene, and benzene, the "three cornerstone brothers", construct the core structure of the product through complex chemical reactions. Ethylene-derived ethylene oxide and propylene-made propylene oxide are the core of polyether additives, while benzene provides the matrix for antiseptic and bactericidal agents. Various functional components such as organic acids and alkanolamines are mostly derived from petroleum-based monomers, undertaking key roles such as lubrication, rust prevention, and pH adjustment.
    Despite relying on petroleum for raw materials, fully synthetic cutting fluid boasts significant environmental advantages. In terms of waste liquid treatment, it is an aqueous solution itself, and external oil contamination is mostly mechanical mixing. Compared with the "inevitable demulsification" of traditional emulsions, it achieves "possible demulsification", greatly reducing treatment difficulty and cost. The oil mist problem has also transformed from the "systematic pollution" of emulsions to a "local issue" controllable through management, significantly improving the workshop environment.
    Currently, fully synthetic cutting fluid is the optimal transitional solution under existing technical conditions, exchanging reasonable upstream petroleum consumption for downstream environmental and health benefits. Meanwhile, the industry is actively exploring bio-based raw materials. Sebacic acid produced by castor oil fermentation and vegetable oil-modified esters have achieved commercial application, laying the foundation for its complete independence from petroleum and realization of full-life-cycle greenization.

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