H12MDA green preparation technology pilot plant passed the assessment

Latest News: On July 30, the pilot plant of MDA catalytic hydrogenation green preparation of H12MDA technology jointly developed by Shaanxi Coal Industry Chemical Technology Development Center Co., Ltd. and the Institute of Process Engineering, Chinese Academy of Sciences, in Shaanxi Weinan Huazhou District passed the 72-hour assessment and calibration organized by Shaanxi Petroleum and Chemical Industry Federation.

MDA (4,4-diaminodiphenylmethane) catalytic hydrogenation green preparation of H12MDA (4,4-diaminodicyclohexylmethane) technology The reaction system adopts a new type of special catalyst, using tetrahydrofuran as a solvent, without adding lye, the reaction conditions Gentle, no waste liquid output. In December 2020, the two parties completed the pilot-scale research of the MDA catalytic hydrogenation green preparation of H12MDA technology development project, and the product was tested to meet the expected technical indicators.

The expert group headed by Professor Li Wenhong from the School of Chemical Engineering of Northwestern University reviewed the original data records, and tracked the entire process of the DCS control room, analysis room, on-site sampling and other positions to ensure the authenticity and reliability of the assessment data. During the assessment period, the pilot plant ran smoothly and safely. The assessment results show that the conversion rate of MDA is 100%, and the yield of H12MDA is 96.5%, and the indicators have reached or exceeded the expected targets.

It is reported that alicyclic amine products are important chemical raw materials and fine chemical intermediates, and MDA is one of the typical representatives of alicyclic amines. The existing traditional process of hydrogenating MDA to prepare H12MDA has problems such as harsh reaction conditions, complex reaction system, and low product selectivity. It is necessary to add liquid caustic soda in tetrahydrofuran solvent to suppress the side reactions of deamination and condensation, resulting in the production of a large amount of alkaline waste liquid. , the environmental risk is high.