欧美1314免费大片,日韩精品一区日韩在线,久久人人妻人人做人人爽,亚欧美一区二区三区

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(xué)工業(yè)中重要的C4原料，來源廣泛，可由煤、石油和生物質(zhì)等路線制得。順酐經(jīng)催化加氫可生成丁二酸酐、γ-丁內(nèi)酯，四氫呋喃、1,4-丁二醇等一系列高附加值的重要精細(xì)化學(xué)品，在軍工、紡織、橡膠樹脂、電池等領(lǐng)域有重要的應(yīng)用，具有廣闊的市場前景。目前，國內(nèi)對(duì)于順酐的需求量有限，呈產(chǎn)能過剩態(tài)勢(shì)。與順酐相比，其下游產(chǎn)品γ-丁內(nèi)酯等是極其重要的化工原料，國內(nèi)需求量以數(shù)萬倍逐年遞增，進(jìn)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(nèi)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(jié)構(gòu)2：1型的層狀結(jié)構(gòu)的頁狀硅酸鎳催化劑，利用其層狀結(jié)構(gòu)的限域效應(yīng)，提高催化劑中活性組分的穩(wěn)定性，在制備過程中摻雜可還原性金屬氧化物前驅(qū)體作為助劑，利用助劑的可還原性產(chǎn)生氧空位，促進(jìn)順酐C=O的選擇性加氫，制備γ-丁內(nèi)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(nèi)酯是一種溶解性強(qiáng)、、綠色的高沸點(diǎn)溶劑，是合成吡咯烷酮及環(huán)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(chǎn)品順酐轉(zhuǎn)化制備高附加值化學(xué)品γ-丁內(nèi)酯具有重要的研究意義及廣闊的應(yīng)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.

本文由順酐廠家友情奉獻(xiàn).更多有關(guān)的知識(shí)請(qǐng)點(diǎn)擊:http://www.myxshdh.cn真誠的態(tài)度.為您提供為的服務(wù).更多有關(guān)的知識(shí)我們將會(huì)陸續(xù)向大家奉獻(xiàn).敬請(qǐng)期待

This article is a friendly contribution from maleic anhydride manufacturers. For more information, please click: http://www.myxshdh.cn Sincere attitude. We will provide you with comprehensive services. We will gradually contribute more relevant knowledge to everyone. Stay tuned