降冰片烯 (NB)的制备均采用双环戊二烯(DCPD)或环戊二烯 (CPD)与乙烯的Diels-Alder反应路线，Diels-Alder反应是一步进行的环加成协同反应，也称双烯合成。该类反应进行时键的断裂和生成是同时进行的，反应过程中只有键变化的过渡态，一步发生成键和断键，没有自由基或离子等活性中间体产生。 由于乙烯不含吸电子性质的取代基，在作为亲二烯体发生Diels-Alder反应时，因匹配轨道间的能差较大，反应比较困难，为提高对乙烯反应活性采取提高压力、升高温度的办法。双环戊二烯(DCPD)在170℃以上高温分解CPD，平衡向生成CPD的方向移动。乙烯与CPD的反应是强放热反应，CPD经加热连续发生放热反应，形成DCPD低聚物及低聚物继续聚合生成DCPD聚合物。 降冰片烯 (NB)，物料混合效果是关键 降冰片烯(NB)的制备均采用双环戊二烯(DCPD)或环戊二烯 (CPD)与乙烯的Diels-Alder反应路线。在反应过程中，温度越高和CPD浓度有利用于多聚物及聚合物的生成，而控制的有效的办法是提高反应体系中乙烯浓度并加速乙烯和CPD双烯合成反应速率，尽可能快地消耗 DCPD解聚生产的CPD。这就要使CPD和乙烯在反应器中均匀混合，提高生成NB反应的选择性，减少 CPD多聚物及聚合物的生成。 岩征仪器 设计出传热效率高、具有特殊结构的全自动反应器，提高其混合效果是技术突破的关键。
上海岩征成立于2011年，是一家业为石油炼制、石油化工、材料合成、煤化工、医药、环保、清洁能源等行业研究机构提供微反、小试及中试侧线撬装成套实验装备的高新技术企业，公司注于以搅拌釜、固定床、流化床等类型反应器为核心模块，按照用户要求非标定制各类催化剂评价、工艺优化、过程放大验证、工业示范装备，反应器规模小到几个毫升，大到几个立方，并配套集成端进料模块、后端分离收集模块及公用工程模块自控系统。公司总部位于上海，紧靠金山化工区，在北京、广州设立分公司，员工150余人，拥有各项利28及多项有技术。公司通过了特种设备生产许可证固定式压力容器中、低压容器（D）、ISO9001:2015质量体系认证及欧盟CE认证，目交付用户各类反应釜、固定床反应器逾万台，产品远销美国、印度和澳大利亚等国家。
Yanzheng in 2011, Shanghai Yanzheng is a high-tech enterprise that specializes in providing complete sets of experimental equipment for micro reactors, small-scale ａnd pilot scale side line prying for research institutions in industries such as petroleum refining, petrochemicals, material synthesis, coal chemicals, pharmaceuticals, environmental protection, ａnd clean energy. The company focuses on using stirred tanks, fixed beds, fluidized beds, ａnd other types of reactors as core modules, ａnd customizing various types of catalyst evaluation, process optimization, process amplification verification, ａnd industrial demonstration equipment according to user requirements. The reactor scale ranges from a few milliliters to several cubic meters, ａnd is equipped with front-end feeding modules, back-end separation ａnd collection modules, ａnd public engineering module self-control systems. The company is headquartered in Shanghai, adjacent to the Jinshan Chemical Zone, with branch offices established in Beijing ａnd Guangzhou, employing more than 150 people ａnd possessing 28 patents ａnd multiple proprietary technologies. The company has obtained a special equipment production license for fixed pressure vessels, including medium ａnd low pressure vessels (D), ISO9001:2015 quality system certification, ａnd EU CE certification. Currently, it has delivered over 10000 types of reactors ａnd fixed bed reactors to users, ａnd its products are exported to countries such as the United States, India, ａnd Australia.
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