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首页> 外文会议>International Symposium on Supercritical Fluids Tome 1: Natural Products, Process amp; Equipment Development; 20030428-20030430; Versailles; FR >INTEGRATION OF EXTRACTION AND RESS FOR SOLVENT RECOVERY FROM ASPHALTENE
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INTEGRATION OF EXTRACTION AND RESS FOR SOLVENT RECOVERY FROM ASPHALTENE

机译：提取和还原法回收沥青质中的溶剂

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A continuous three-stage supercritical extraction process with capacity of 1.0 kg/hr was setup to extract petroleum residue by pentane to obtain more oil for further upgrading. A problem how to recover solvent remained in asphaltene was encountered when very high oil yield is aimed. As is well known, asphaltene is very complicated mixtures with high molecular weight up to ten thousands or higher, having a very high melting points (Softening Point) and being thermally liable, solvent in it can't be recovered by furnace heating without risk of coking. To solve this problem, a spray system integrated to the bottom of extractor was used to spray asphaltene phase. By RESS process, rapid expansion of supercritical or subcritical asphaltene solution, the asphaltene was sprayed and cooled into solid particles and solvent was recovered as gas. The influence of operating conditions on the yield and quality of extracts, i.e., deasphalted oil (DAO) and resin were searched in the range of temperature 150-220℃, pressure of 4.0-6.0MPa and solvent to feed ratio (S/F) 2.5-5.0(wt/wt). The particles distribution, apparent forms and the packing density, which vary as spray nozzle size and operating pressure, were measured, The particle structures by SEM were observed as well. With this innovation to conventional processes, furnace can be eliminated for solvent recovery from asphaltene, thus reducing energy consumption.
机译：设置了一个连续的三阶段超临界萃取工艺，其处理能力为1.0千克/小时，可以通过戊烷萃取石油残留物，从而获得更多的石油，以便进一步提质。当目标是非常高的油收率时，遇到了如何回收沥青质中残留的溶剂的问题。众所周知，沥青质是非常复杂的混合物，具有高达一万或更高的高分子量，具有非常高的熔点（软化点）并且具有热稳定性，其中的溶剂不能通过加热炉进行回收而没有任何危险。焦化。为了解决这个问题，使用集成在萃取器底部的喷雾系统来喷雾沥青质相。通过RESS工艺，快速膨胀超临界或亚临界沥青质溶液，将沥青质喷雾并冷却成固体颗粒，并以气体形式回收溶剂。在温度150-220℃，压力4.0-6.0MPa和溶剂进料比（S / F）的范围内，研究了操作条件对提取物（即脱沥青油和树脂）的收率和质量的影响。 2.5-5.0（wt / wt）。测量了随着喷嘴尺寸和操作压力而变化的颗粒分布，表观形式和堆积密度，并通过SEM观察了颗粒结构。通过对传统工艺的创新，可以省去用于从沥青质中回收溶剂的熔炉，从而降低了能耗。

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