PROCESS FOR PRODUCING DIARYL CARBONATE

• Main Authors: SUGISE, RYOJI, DOI, TAKASHI, FUJITSU, SATORU, TANAKA, SHUJI, II, HIROFUMI, NISHIHIRA, KEIGO, NISHIDA, YUKI, KASHIWAGI, KOICHI, HARADA, KATSUMASA
• Format: Patent
• Language: English; Korean
• Published: 15.12.1999
• Edition: 6
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

고순도의 탄산디아릴은(A) (a)옥살산디아릴 및 페놀화합물 또는 (b)옥살산알킬아릴을 촉매의 존재하에 한단계 또는 두단계로 에스테르 교환 반응시켜 반응계로부터 부산물은 제거하면서 옥살산디아릴을 제조하는 공정(B), 공정(A)의 결과되는 반응 생성물 혼합물로부터 옥살산디아릴을 수집하는 공정, (C)바람직하게는 인화합물 함유촉매의 존재하에 옥살산디아릴을 탈카르보닐화 반응시켜 일산화탄소로 이루어지는 반응부산물은 반응계로 부터 제거하면서 옥살산디아릴을 해당 탄산디아릴로 전환시키는 공정, (D) 공정(C)의 반응생성물 혼합물로부터 탄산디아릴을 수집하는 공정에 의해 고수율로 제조된다. A diaryl carbonate with a high degree of purity is produced at a high yield by (A) subjecting (a) a diaryl oxalate and a phenol compound or (b) an alkylaryl oxalate to transesterification reaction in one or two stages in the presence of a catalyst to prepare a diaryl oxalate, while removing a by-product from the reaction system; (B) collecting the diaryl oxalate from the resultant reaction product mixture of the step (A); (C) subjecting the diaryl oxalate to a decarbonylation reaction, preferably in the presence of a phosphorous compound-containing catalyst, to convert the diaryl oxalate to a corresponding diaryl carbonate, while removing a reaction by-product comprising carbon monoxide from the reaction system; and (D) collecting the diaryl carbonate from the reaction product mixture of the step (C).