US Patent Issued to Sinochem Hebei Fuheng, Sato Planning on March 4 for "Method for producing 1,4-dimethylnaphthalene" (Chinese Inventors)

ALEXANDRIA, Va., March 5 -- United States Patent no. 12,240,805, issued on March 4, was assigned to Sinochem Hebei Fuheng Co. Ltd (Hebei, China) and Sato Planning Co. Ltd (Ibaraki, Japan).

"Method for producing 1,4-dimethylnaphthalene" was invented by Jianpo Ren (Hebei, China), Lieyi Ji (Hebei, China), Junsheng Wang (Hebei, China) and Zhiqiang Jiang (Hebei, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides an industrial method for producing 1,4-dimethylnaphthalene with a small content of 1,3-dimethylnaphthalene. In this method for producing 1,4-dimethylnaphthalene, 5-phenyl-2-hexene is cyclized in the presence of acid catalysts to prepare crude 1,4-dimethyl-1,2,3,4-tetrahydr...