US Patent Issued to HONSHU CHEMICAL INDUSTRY on March 31 for "Method for producing binaphthyl carboxylic acid" (Japanese Inventors)

ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,051, issued on March 31, was assigned to HONSHU CHEMICAL INDUSTRY Co. LTD. (Tokyo).

"Method for producing binaphthyl carboxylic acid" was invented by Daichi Sakuma (Wakayama, Japan) and Takeru Suto (Wakayama, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for producing 2,2'-bis(carboxymethoxy)-1,1'-binaphthyl includes performing steps (i) to (iv) below in sequence using a 2,2'-bis(alkoxycarbonylmethoxy)-1,1'-binaphthyl as a starting material: (i) a hydrolysis reaction step, (ii) a step of distilling off a resulting alcohol represented by formula (3) above from a reaction system, (iii) a step of acidifying a reaction solution, and (iv...