PRETREATMENT METHOD FOR CHELATE RESIN HAVING PYRIDINE RING USED FOR COLLECTING CATALYST IN AROMATIC CARBOXYLIC ACID PRODUCTION PROCESS

• Main Authors: ZAIMA, FUMIYA, FUJITA, HIDEAKI
• Format: Patent
• Language: English; French; Japanese
• Published: 25.08.2011
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

In a process for producing an aromatic carboxylic acid, when a chelate resin having a pyridine ring, which is used in the step for absorbing and collecting a bromide ion and a heavy metal ion derived from a catalyst by means of an oxidation reaction mother liquor, is being subjected to pretreatment,...