| Microbial method, which follows the copper framework catalyst method, is the third generationtechnology of producing acrylamide (AM). It has the benefit of large conversion rate(＞99.99%), satisfyingselectivity, high activity and significant yield. So a number of manufacturers are committed to producingAM monomer with this technology at present. As the microbial technique applications for a relativelyshort time in domestic, there are lots of problems in the post-processing process, which affected thestability and quality of the product seriously and restricted development of microbial technology ofproducing AMThe refining process of the AM were studied in this paper. And the effects of centrifuge types andparameters on separation, has also been investigated via the indoor experiments. The effects of theultrafiltration membrane structure, the retaint molecular weight and conditions, such as pressure, feedconcentration, flowrate and contamination, on the refining process were discused, including ion exchangeresin type and parameters such as pressure and flow velocity. Based on experimental study, the method ofrefining AM was optimized and the best technologic conditions were determined. Finally the optimizedprocess compared with the former.The experimental results are as follows:①By optimizing the process route, the energy consuming of whole process and the AM loss wereboth reduced. Besides, the stability and quality of AM were improved.②By choosing disk type centrifuge with high separating factor, rolled ultrafiltration membrane withretaint molecular weight less than 3000, ionic exchange resin with large cavities, when all equipmentsoperated at the best technological conditions, the greatest degree of elimination of organics, inorganicimpurity from AM could be reached so that it could meet the quality requirement of salt-resistantpolyacrylamine product.
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