HFO-1234yf Refrigerant Composition With Controlled Impurity Ranges

The patent changes the chemical composition parameters by using HFO-1234yf as the primary refrigerant compound and controlling the presence of specific additional compounds within defined concentration ranges. This parameter change achieves low global warming potential while meeting environmental regulation requirements, resolving the contradiction between harmful environmental factors and regulatory compliance.

Instead of extensive purification to remove all impurities, the patent takes out only the specific additional compounds that are present in small amounts (less than 1 weight percent) and are identified as acceptable. This selective extraction approach maintains sufficient purity for refrigeration applications while avoiding the complexity and cost of complete purification processes.

The patent converts the harmful presence of additional compounds produced during manufacturing into a beneficial specification by defining acceptable concentration ranges for these compounds. Rather than viewing them as impurities to be completely eliminated, the patent specifies that certain additional compounds at less than 1 weight percent are acceptable, thereby maintaining low global warming potential while acknowledging practical manufacturing limitations.