顺酐法BDO，顾名思义是以顺酐为原料制备BDO的工艺，其原料顺酐可由苯或者丁烷氧化制成。根据顺酐加氢时的步骤不同可分为直接加氢法与间接加氢法，间接加氢法中根据加氢时的物料形态又可分为气相加氢法与液相加氢法。下面
顺酐厂家来讲讲更多事项：
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:
直接加氢与间接加氢
Direct hydrogenation and indirect hydrogenation
直接加氢法
Direct hydrogenation method
该工艺能够同时不同比例的THF(四氢呋喃)、GBL(y-丁内酯)和BDO等系列产品，反应条件不同，其产品的相应组成也是不同的。
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.
酯化加氢法
Esterification hydrogenation method
间接酯化加氢工艺早是由英国Davy公司开发成功的，因此又叫Davy法。加氢反应可以在气相或者是液相中进行，采用了铜系催化剂，主体反应的条件要比顺酐直接加氢工艺温和很多。
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.
由于顺酐加氢是强放热反应，直接加氢反应条件苛刻，控制难度高，目前还没有工业化运行装置，在运装置均采用的是间接法。
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.
气相加氢与液相加氢
Gas phase hydrogenation and liquid phase hydrogenation
两者化学反应方程式是一致的，区别在于加氢单元马来酸二甲酯是在气相还是在液相条件下反应。
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.
消耗与排放
Consumption and emissions
正丁烷顺酐法制BDO工艺路线，吨BDO的主要消耗大致为正丁烷1.15t、氢气1200m3。该法的主要原料为正丁烷和氢气，BDO的成本较高。
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.
工艺路线优势
Advantages of process route
顺酐法制BDO的原料之一正丁烷，其主要来源一是大型炼化装置石油裂解的C4馏分分离得到的副产品;二是油田气和湿天然气、LPG(液化石油气)的进口商，国内顺酐法制BDO企业主要分布的沿海地区，可以依托石油炼化企业或港口获得原料正丁烷。
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.jnjhhg.cn Consult!
