Sinopec has applied for a patent for a method of modifying nanoclustered Y molecular sieves, which significantly increases the mesopore content and hydrothermal stability

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Sinopec has applied for a patent for a method of modifying nanoclustered Y molecular sieves, which significantly increases their mesopore content and hydrothermal stability. August 22, 2025, 19:02 · Finance World. According to reports from Finance World on August 22, 2025, **information from the Intellectual Property Office shows that Sinopec Corporation and Sinopec (Dalian) Petrochemical Research Institute Co., Ltd. have filed a patent application titled “A Method for Modifying Nanoclustered Y Molecular Sieves,” with the publication number CN120515477A; the application was submitted in February 2024. The patent abstract indicates that the present invention discloses a method for modifying nanoclustered Y molecular sieve, which includes the following steps: (a) controlling the sodium oxide content of the nanoclustered Y molecular sieve to 2.0%–4.5% through ion exchange treatment ； (b) Perform mild dealumination and silicon supplementation on the nanoclustered Y molecular sieve obtained in step (a) using an ammonium fluorosilicate solution; wherein mild dealumination and silicon supplementation refers to increasing the silica-alumina ratio of the nanoclustered Y molecular sieve after such treatment by 50%–200% compared to that before treatment, preferably by 80%–150% ； (c) The material obtained in step (b) is subjected to hydrothermal dealumination treatment ； (d) The material after hydrothermal treatment was subjected to acid treatment to obtain modified nanoclustered Y molecular sieve. Compared with the nanocluster Y molecular sieve before treatment, the modified Y molecular sieve prepared by this modification method not only retains the nanocluster morphology but also significantly increases the mesopore content and hydrothermal stability.