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左磷右胺盐生产中离心分离过程研究
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作者 刘丽艳 周普振 +3 位作者 宁双波 张煜 谭蔚 乔琳 《化学工程》 CAS CSCD 北大核心 2012年第1期14-17,共4页
针对左磷右胺盐生产中使用的普通下出料离心机存在的过滤分离效率低、滤饼卸除困难等问题进行了研究。采用加入乙醇的方法,来降低结晶液黏度,改善了结晶液过滤分离的特性。选择了装配有撇液装置的抖袋离心机作为结晶液离心分离的设备,... 针对左磷右胺盐生产中使用的普通下出料离心机存在的过滤分离效率低、滤饼卸除困难等问题进行了研究。采用加入乙醇的方法,来降低结晶液黏度,改善了结晶液过滤分离的特性。选择了装配有撇液装置的抖袋离心机作为结晶液离心分离的设备,并进行了工业化试验。结果表明:与普通下出料离心机相比,抖袋离心机具有良好的密封性,抖包效果好,基本无滤饼残留,过滤时间短,出料量大,生产效率较普通下出料离心机大幅度提高。研究结果为左磷右胺盐生产中离心分离设备的选择提供了一定的依据,为后续工业生产效率的提高及工作环境的改善奠定了基础。 展开更多
关键词 左磷右胺盐 离心分离 抖袋离心机
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左磷右胺盐精制工艺的改进研究及应用
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作者 张庆武 许良 +1 位作者 潘军 张薇 《当代化工》 CAS 2006年第5期307-308,365,共3页
通过筛选寻找到对左磷右胺盐有更大溶解度的溶媒,探索将其用于左磷右胺盐的精制,通过小试和工业化试验确定了关键工艺参数,使单批生产能力增大,减少了溶媒用量,减少了排污,减少了能源消耗,经严格的质量认证确证,该工艺改进对产品质量无... 通过筛选寻找到对左磷右胺盐有更大溶解度的溶媒,探索将其用于左磷右胺盐的精制,通过小试和工业化试验确定了关键工艺参数,使单批生产能力增大,减少了溶媒用量,减少了排污,减少了能源消耗,经严格的质量认证确证,该工艺改进对产品质量无不良影响,稳定可靠,应用于生产中使产品的生产成本得到大幅度降低,资源有效利用率得到明显提高。 展开更多
关键词 磷霉素钠 左磷右胺盐 溶媒 溶解度 精制
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High-performance 110 kVp hard x-ray detector based on all-crystalline-surface passivated perovskite single crystals
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作者 Juyoung Ko Beomjun Park +7 位作者 Jangwon Byun Sandeep Pandey Ajin Jo Joo-Hong Lee Wonho Lee Jin-Wook Lee Nam-Gyu Park Man-Jong Lee 《InfoMat》 SCIE CSCD 2024年第8期97-110,共14页
Halide perovskite single crystals(SCs)have attracted much attention for their application in high-performance x-ray detectors owing to their desirable properties,including low defect density,high mobility–lifetime pr... Halide perovskite single crystals(SCs)have attracted much attention for their application in high-performance x-ray detectors owing to their desirable properties,including low defect density,high mobility–lifetime product(μτ),and long carrier diffusion length.However,suppressing the inherent defects in perovskites and overcoming the ion migration primarily caused by these defects remains a challenge.This study proposes a facile process for dipping Cs0.05FA0.9MA0.05PbI3 SCs synthesized by a solution-based inverse temperature crystallization method into a 2-phenylethylammonium iodide(PEAI)solution to reduce the number of defects,inhibit ion migration,and increase x-ray sensitivity.Compared to conventional spin coating,this simple dipping process forms a two-dimensional PEA2PbI4 layer on all SC surfaces without further treatment,effectively passivating all surfaces of the inherently defective SCs and minimizing ion migration.As a result,the PEAI-treated perovskite SC-based x-ray detector achieves a record x-ray sensitivity of 1.3×10^(5)μC Gyair^(-1) cm^(-2) with a bias voltage of 30 V at realistic clinical dose rates of 1–5 mGy s^(-1)(peak potential of 110 kVp),which is 6 times more sensitive than an untreated SC-based detector and 3 orders of magnitude more sensitive than a commercialα-Se-based detector.Furthermore,the PEAI-treatedperovskite SC-based x-ray detector exhibits a low detection limit(73 nGy s^(-1)),improved x-ray response,and clear x-ray images by a scanning method,highlighting the effectiveness of the PEAI dipping approach for fabricating next-generation x-ray detectors. 展开更多
关键词 2D PEA2PbI4 layers clinical dose rates perovskite single crystals phenethylammonium iodide(PEAI) surface passivation x-ray sensitivity
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