In a 200 mL stainless steel autoclave, dimethyl 2,6 naphthalene dicarboxylate (DM 2,6 NDC) was prepared by reacting 2,6 naphthalenedicarboxylic acid (2,6 NDA) with methyl alcohol in the presence of phosphotungstic acid as catalyst.

• 在 0 .；2 L不锈钢高压釜中；用磷钨酸作催化剂；以 2；6萘二甲酸和甲醇为原料制备了 2；6萘二甲酸二甲酯。