顺丁烯二酸酐简称顺酐，是世界上除苯酐和醋酐以外的第三大酸酐原料，是化学工业中重要的C4原料，来源广泛，可由煤、石油和生物质等路线制得。顺酐经催化加氢可生成丁二酸酐、γ-丁内酯，四氢呋喃、1,4-丁二醇等一系列高附加值的重要精细化学品，在军工、纺织、橡胶树脂、电池等领域有重要的应用，具有广阔的市场前景。目前，国内对于顺酐的需求量有限，呈产能过剩态势。与顺酐相比，其下游产品γ-丁内酯等是极其重要的化工原料，国内需求量以数万倍逐年递增，进口依存度高。基于此，采用改性镍硅催化剂，温和条件下催化顺酐加氢制备γ-丁内酯。

Maleic anhydride, abbreviated as maleic anhydride, is the third largest anhydride raw material in the world after phthalic anhydride and acetic anhydride. It is an important C4 raw material in the chemical industry and has a wide range of sources. It can be produced from coal, petroleum, biomass and other routes. Maleic anhydride can be converted into succinic anhydride through catalytic hydrogenation γ- A series of high value-added important fine chemicals such as butyrolactone, tetrahydrofuran, and 1,4-butanediol have important applications in military industry, textiles, rubber resins, batteries, and other fields, with broad market prospects. At present, the demand for maleic anhydride in China is limited and there is a trend of overcapacity. Compared with maleic anhydride, its downstream products γ- Butyrolactone and other chemical raw materials are extremely important, and the domestic demand is increasing by tens of thousands of times year by year, with a high dependence on imports. Based on this, a modified nickel silicon catalyst is used to catalyze the efficient hydrogenation of maleic anhydride under mild conditions for preparation γ- Butyrolactone.

催化剂是由活性金属Ni、可还原性金属氧化物，载体SiO2组成。具体是由硅氧四面体和镍氧八面体组成的具有三明治结构2：1型的层状结构的页状硅酸镍催化剂，利用其层状结构的限域效应，提高催化剂中活性组分的稳定性，在制备过程中掺杂可还原性金属氧化物前驱体作为助剂，利用助剂的可还原性产生氧空位，促进顺酐C=O的选择性加氢，制备γ-丁内酯。

The catalyst is composed of active metal Ni, reducible metal oxide, and carrier SiO2. Specifically, a layered nickel silicate catalyst with a sandwich structure of 2:1 type, composed of tetrahedra of silicon oxide and octahedra of nickel oxide, utilizes the confinement effect of its layered structure to improve the stability of the active components in the catalyst. During the preparation process, reducible metal oxide precursors are doped as additives, and the reducibility of the additives is utilized to generate oxygen vacancies, promoting the selective hydrogenation of maleic anhydride C=O and efficiently preparing the catalyst γ- Butyrolactone.

γ-丁内酯是一种溶解性强、、绿色的高沸点溶剂，是合成吡咯烷酮及环丙胺类化合物的重要原料，也是合成杀虫剂、除草剂等药物的中间体，因此催化煤基下游产品顺酐转化制备高附加值化学品γ-丁内酯具有重要的研究意义及广阔的应用前景。

γ- Butyrolactone is a highly soluble, non-toxic, and environmentally friendly high boiling solvent. It is an important raw material for the synthesis of pyrrolidone and cyclopropylamine compounds, as well as an intermediate for the synthesis of insecticides, herbicides, and other drugs. Therefore, it efficiently catalyzes the conversion of coal based downstream products such as maleic anhydride to prepare high value-added chemicals γ- Butyrolactone has important research significance and broad application prospects.

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