共查询到20条相似文献,搜索用时 234 毫秒
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文中分析了梅山焦化厂精炼车间酚工段洗涤三组排管堵塞物成分 ,确认堵塞物主要为亚铁氰化铁络合物 ,并提出了改善洗涤操作的措施和对策。 相似文献
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目前广泛应用于生物医学领域的合成纳米羟基磷灰石大多数都是在pH>10的碱性条件下合成的,这就导致了在合成后期需要花大量时间、消耗大量水清洗羟基磷灰石以除去其碱性,影响后续实验研究和生产进程。本文基于中性磷酸缓冲液(PBS)建立了一种快速洗涤羟基磷灰石的方法。采用沉淀法以硝酸钙和磷酸三钠为原料制备了羟基磷灰石(HA),用磷酸氢二钠和磷酸二氢钠配制了pH=7的PBS,采用所配制的PBS快速洗涤羟基磷灰石至中性,同时通过传统洗涤流程清洗另一批次羟基磷灰石至中性。通过TEM、XRD、IR、TG分析了两种洗涤方法生成产物的晶粒形貌、晶体尺寸及化学成分。结果表明:PBS快速洗涤法得到的产物与传统方法洗涤的羟基磷灰石的成分、晶体结构、尺寸及产物纯度无明显区别,但PBS洗涤可在一定程度上提高了HA晶体的结晶完整性和热稳定性。本文提出的PBS快速洗涤法节约清洗HA的去离子水达80%以上,大幅缩短洗涤周期,有望在实验室及工业生产中提高纳米羟基磷灰石的产出速率和压缩产出成本。 相似文献
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样品经过650~700℃灼烧除去有机物和硫,用王水分解,采用活性炭静态吸附的方法对其中的金进行富集。然后进行过滤,用稀王水、氟化氢铵热溶液、稀盐酸以及温水的洗涤滤饼除去铜、铁、铅等离子,通过灰化灼烧除去活性炭,用王水溶解金粒,在稀王水介质中,用火焰原子吸收法直接测定金的含量。 相似文献
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《中国石油和化工标准与质量》2019,(6):237-239
聚合物驱以其技术简单、提高原油采收率幅度大和经济效益好等优点,成为当前国内外最具有发展潜力的三次采油方法之一。目前,渤海SZ36-1油田储层随着聚合物注入量的增加,注聚井堵塞问题日益突出,严重影响注聚驱效果。注聚井堵塞物类型复杂,包括无机杂质、沥青质、微生物及其代谢产物等。因此,需要选择既能解除无机堵塞物,又能解除有机物堵塞物的解堵技术。本文介绍一种复合解堵工艺技术,该技术以高效解堵剂SA-PR作为主剂,通过与常规酸化的协同作用,使SA-PR释放出二氧化氯,二氧化氯可以解除地层中的有机堵塞物、微生物细菌及其代谢物等,而酸液对地层中无机堵塞物解除效果较好。该复合解堵工艺技术为SZ36-1油田的注聚井解堵增注提供了理论依据和实验基础,为油田的注聚井解堵增注技术提供有力保障。 相似文献
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针对传统的解堵增注措施进行解堵增注后,注水井注入压力无明显减少、解堵效果差的问题,以油田注水井为研究对象,分析油田注水井堵塞原因并研究解堵增注措施.取油田注水井的堵塞物,分析堵塞物组成成分和形成机理,确定油田注水井堵塞物的形成原因.根据分析的注水井堵塞物成分,配置解堵试剂并优化试剂配方.设计解堵增注施工工艺参数和施工流... 相似文献
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介绍了对波纹填料塔油渣堵塞物的处理方法、清洗过程及效果,利用洗油与轻油混合物对蒸氨塔及换热器进行间接加热清扫,填料上的堵塞物基本消除。可为同类塔器清洗提供有益借鉴。 相似文献
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傅环环 《中国洗涤用品工业》2021,(3):57-61
清洁织物主要分为客衣洗涤织物和公用纺织品洗涤织物两大类,文章立足于公用纺织品和客衣清洁织物的洗涤质量现状,关注纺织品是否受到看不见的微生物或者化学物质的污染,对造成洗涤质量不合格的原因进行分析,以期为行业同仁提供一定参考. 相似文献
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《Ceramics International》2021,47(20):28744-28753
The bagasse, which is a typical agricultural and forestry waste, was employed as the silicon source to produce Li4SiO4-based ceramics with superior CO2 sorption performance. It is found that the presence of impurities elements in the bagasse ash will bring complex side reactions and form side products during the sorbent preparation process, which are extremely harmful to the performance of the synthetic sorbent. Pretreatment has been considered as an effective approach to reduce the impurities elements. In this work, the effects and mechanisms of water/acid washing pretreatments on bagasse ash were firstly detailed investigate and compared. The results indicate that the hydrochloric acid washing pretreatment can effectively remove the residual metals (Ca, Fe, etc.) in the sample in addition to the water-soluble impurities (K, P, S, etc.). The maximum sorption capacity of sorbent synthesized by the acid washing pretreatment is about 0.32 g/g sorbent and the superior performance can be well maintained over 10 cycles. A novel technical route utilizing the ash from biomass power plants for in-situ CO2 capture has been developed, which has great potential for carbon capture in the future. 相似文献
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介绍了中平能化集团开封东大化工有限公司ADC发泡剂生产中氯化洗水循环利用的试验情况,用氯化洗水与浓硫酸混合后与水合肼反应生成联二脲,解决了加入浓硫酸瞬时肼尿液局部分解的问题,采用n(浓硫酸):n(氯化洗水)=1:2的配比可使联二脲收率达到94.70%。 相似文献
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Gang Zhao Wei Liu Siqi Yang Lan Luo Guangming Li 《Chemical Engineering Communications》2016,203(9):1207-1215
Washing of metatitanic acid (H2TiO3) consumes a large amount of water during the production of titanium dioxide (TiO2) by the sulfate process. In this work, ultrasound technology is used for the pretreatment of a metatitanic acid slurry before washing. The water consumptions of washing process are compared in the absence and presence of ultrasound treatment. The effects of wash liquor properties, ultrasound time, and ultrasound power on removal of iron impurities are investigated. The washed product was characterized by X-ray diffraction, scanning electron microscopy, and particle size distribution. The effects of ultrasound on the crystal structure of TiO2 and the mechanism of water saving are discussed. The results show that better removal of iron impurities from metatitanic acid is achieved using ultrasound. The saving wash liquor when using ultrasound was 93 mL for washing a 100 mL metatitanic acid slurry when using a pH 2 wash liquor, ultrasonic time of 30 min, and 185 W ultrasonic power. The average particle size was reduced from 2.11 to 1.02 µm, which improves washing performance. The crystal lattice parameters of TiO2 exhibited no effect on rutile type or quality of product. 相似文献