1、丁烷法代替苯法成為主要趨勢
1. Butane method instead of benzene method has become the main trend
目前國內(nèi)順酐工藝主要是苯氧化法，隨著石油的上升，苯原料高位運行，苯氧化制順酐成本加重，導致以苯為原料的國內(nèi)順酐企業(yè)不得不面臨成本問題。在要求的提高和原料苯飛漲的形勢下，丁烷法催化劑選擇性提高，以苯法順酐將被丁烷催化氧化制順酐取代，將成為主要趨勢。
At present, the domestic maleic anhydride production process is mainly benzene oxidation method. With the rise of oil price and the high price of benzene raw materials, the cost of benzene oxidation to maleic anhydride increases, resulting in the production cost problem of domestic maleic anhydride enterprises using benzene as raw materials. With the improvement of environmental protection requirements and the soaring price of raw benzene, the selectivity of butane catalyst is improved. The production of maleic anhydride by benzene method will be replaced by butane catalytic oxidation to maleic anhydride, which will become the main trend.
2、溶劑吸收法發(fā)展?jié)摿^大
2. Solvent absorption method has great development potential
在后處理工藝中，溶劑吸收法節(jié)省了蒸發(fā)脫水的大量消耗，避免生成順酸和異構化反應，提高了順酐的回收率并降低了設備投資，和水吸收法工藝相比，其費用降低近20%，是目前國內(nèi)外比較有吸引力的后處理工藝。整體來看，采用正丁烷固定床氧化法和溶劑吸收法后處理方法順酐，可取得較好的經(jīng)濟效益，未來將有很大的發(fā)展?jié)摿Α?br />
In the post-treatment process, solvent absorption method saves a lot of consumption of evaporation dehydration, avoids the formation of CIS acid and isomerization reaction, improves the recovery rate of maleic anhydride and reduces equipment investment. Compared with water absorption process, its production cost is reduced by nearly 20%. It is an attractive post-treatment process at home and abroad. On the whole, the production of maleic anhydride by n-butane fixed bed oxidation and solvent absorption post-treatment can obtain good economic benefits and will have great development potential in the future.
3、現(xiàn)代化控制手段加強
3. Strengthening modern control means
順酐是一項較為復雜且系統(tǒng)的工作，整個過程涵蓋的內(nèi)容相對較多，一旦某個環(huán)節(jié)或是細節(jié)出現(xiàn)問題，不但會影響產(chǎn)量，而且還可能引起事故。加強順酐工藝與防范對策的研究，利用現(xiàn)代化控制手段和的管理系統(tǒng)，對關鍵設備進行動態(tài)化監(jiān)測，對強化主體的防范意識，優(yōu)化順酐工藝流程，提高效率和質(zhì)量等，具有非常重要的現(xiàn)實意義和指導價值。
Maleic anhydride production is a complex and systematic work, and the whole process covers relatively many contents. Once there is a problem in a certain link or detail, it will not only affect the output, but also cause safety accidents. Strengthening the research on maleic anhydride production process and safety prevention countermeasures, using modern control means and all-round management system to dynamically monitor key equipment, has very important practical significance and guiding value for strengthening the safety prevention consciousness of production subjects, optimizing maleic anhydride production process and improving production efficiency and quality.
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