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順丁烯二酸酐簡稱順酐，是世界上除苯酐和醋酐以外的第三大酸酐原料，是化學工業中重要的C4原料，來源廣泛，可由煤、石油和生物質等路線制得。順酐經催化加氫可生成丁二酸酐、γ-丁內酯，四氫呋喃、1,4-丁二醇等一系列高附加值的重要精細化學品，在軍工、紡織、橡膠樹脂、電池等領域有重要的應用，具有廣闊的市場前景。目前，國內對于順酐的需求量有限，呈產能過剩態勢。與順酐相比，其下游產品γ-丁內酯等是極其重要的化工原料，國內需求量以數萬倍逐年遞增，進口依存度高。基于此，采用改性鎳硅催化劑，溫和條件下催化順酐加氫制備γ-丁內酯。

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.

催化劑是由活性金屬Ni、可還原性金屬氧化物，載體SiO2組成。具體是由硅氧四面體和鎳氧八面體組成的具有三明治結構2：1型的層狀結構的頁狀硅酸鎳催化劑，利用其層狀結構的限域效應，提高催化劑中活性組分的穩定性，在制備過程中摻雜可還原性金屬氧化物前驅體作為助劑，利用助劑的可還原性產生氧空位，促進順酐C=O的選擇性加氫，制備γ-丁內酯。

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-丁內酯是一種溶解性強、、綠色的高沸點溶劑，是合成吡咯烷酮及環丙胺類化合物的重要原料，也是合成殺蟲劑、除草劑等藥物的中間體，因此催化煤基下游產品順酐轉化制備高附加值化學品γ-丁內酯具有重要的研究意義及廣闊的應用前景。

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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