順酐法BDO，顧名思義是以順酐為原料制備BDO的工藝，其原料順酐可由苯或者丁烷氧化制成。根據(jù)順酐加氫時的步驟不同可分為直接加氫法與間接加氫法，間接加氫法中根據(jù)加氫時的物料形態(tài)又可分為氣相加氫法與液相加氫法。下面
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The maleic anhydride method BDO, as the name suggests, is a process of preparing BDO from maleic anhydride, which can be made by oxidation of benzene or butane. According to the different steps during the hydrogenation of maleic anhydride, it can be divided into direct hydrogenation method and indirect hydrogenation method. In indirect hydrogenation method, it can be further divided into gas phase hydrogenation method and liquid phase hydrogenation method based on the material morphology during hydrogenation. Let's talk more about maleic anhydride manufacturers:
直接加氫與間接加氫
Direct hydrogenation and indirect hydrogenation
直接加氫法
Direct hydrogenation method
該工藝能夠同時不同比例的THF(四氫呋喃)、GBL(y-丁內(nèi)酯)和BDO等系列產(chǎn)品，反應條件不同，其產(chǎn)品的相應組成也是不同的。
This process can simultaneously produce a series of products such as THF (tetrahydrofuran), GBL (y-butyrolactone), and BDO in different proportions. The corresponding composition of the products varies depending on the reaction conditions.
酯化加氫法
Esterification hydrogenation method
間接酯化加氫工藝早是由英國Davy公司開發(fā)成功的，因此又叫Davy法。加氫反應可以在氣相或者是液相中進行，采用了銅系催化劑，主體反應的條件要比順酐直接加氫工藝溫和很多。
The indirect esterification hydrogenation process was developed by Davy Company in the UK, hence it is also known as the Davy method. The hydrogenation reaction can be carried out in either the gas phase or the liquid phase, using copper based catalysts. The main reaction conditions are much milder than the direct hydrogenation process of maleic anhydride.
由于順酐加氫是強放熱反應，直接加氫反應條件苛刻，控制難度高，目前還沒有工業(yè)化運行裝置，在運裝置均采用的是間接法。
As maleic anhydride hydrogenation is a strong exothermic reaction, the direct hydrogenation reaction conditions are harsh, and the control is difficult. At present, there is no industrial operation device, and the devices in operation are all indirect methods.
氣相加氫與液相加氫
Gas phase hydrogenation and liquid phase hydrogenation
兩者化學反應方程式是一致的，區(qū)別在于加氫單元馬來酸二甲酯是在氣相還是在液相條件下反應。
The chemical reaction equations between the two are consistent, with the difference being whether the hydrogenation unit dimethyl maleate reacts in the gas or liquid phase conditions.
消耗與排放
Consumption and emissions
正丁烷順酐法制BDO工藝路線，噸BDO的主要消耗大致為正丁烷1.15t、氫氣1200m3。該法的主要原料為正丁烷和氫氣，BDO的成本較高。
The main consumption for producing ton of BDO through the process of n-butane maleic anhydride method is approximately 1.15 tons of n-butane and 1200 m3 of hydrogen gas. The main raw materials for this method are n-butane and hydrogen, and the production cost of BDO is relatively high.
工藝路線優(yōu)勢
Advantages of process route
順酐法制BDO的原料之一正丁烷，其主要來源一是大型煉化裝置石油裂解的C4餾分分離得到的副產(chǎn)品;二是油田氣和濕天然氣、LPG(液化石油氣)的進口商，國內(nèi)順酐法制BDO企業(yè)主要分布的沿海地區(qū)，可以依托石油煉化企業(yè)或港口獲得原料正丁烷。
One of the raw materials for the maleic anhydride method of BDO is n-butane, which mainly comes from the by-product obtained from the C4 fraction separation of petroleum cracking in large refining and chemical plants; The second is the importer of oilfield gas, wet natural gas, and LPG (liquefied petroleum gas). Domestic BDO enterprises using maleic anhydride method are mainly distributed in coastal areas, and can rely on petroleum refining enterprises or ports to obtain raw material n-butane.
In short, the cost advantage of the BDO process route using n-butane maleic anhydride is obvious, the technology is mature, and the pollution discharge is low, which has great development potential. If you have any doubts or needs, please come to our website http://www.paimaizhe.com Consult!
