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1引言聚乙二醇二甲醚，系一种优良的气体净化剂，越来越多地用于合成气及天然气中硫化氢，二氧化碳等杂质的去除。南京化学工业公司于1984年成功地开发了基于该溶剂的气体净化技术，并首先在国内化肥行业大力推广。作为气体净化溶剂，其平均分子量和分布特征是非常重要的质量指
1 Introduction Polyethylene glycol dimethyl ether, an excellent gas purifying agent, is increasingly used for the removal of impurities such as hydrogen sulfide and carbon dioxide in syngas and natural gas. Nanjing Chemical Industry Co., Ltd. succeeded in developing a gas purification technology based on the solvent in 1984 and first promoted it vigorously in the domestic fertilizer industry. As a gas cleaning solvent, its average molecular weight and distribution characteristics are very important quality indicators