共查询到20条相似文献,搜索用时 125 毫秒
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介绍了粗甲醇杂质组成,阐述了影响精甲醇质量的原因、调整过程,并对实际生产中出现的影响产品质量的现象逐一分析,提出了解决问题的方案,对甲醇生产厂家产品质量控制有一定的借鉴意义。 相似文献
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本文论述了造成精胍产品质量不高的三个原因,并从提高粗胍含量、降低PH值、母液补加清水的途径来提高精胍产品质量。 相似文献
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粉甲醇密度偏低的原因分析马芳孙(宝鸡氮肥厂陕西省宝鸡市721008)精甲醇生产过程中,影响精甲醇产品质量的因素很多,但主要是粗甲醇质量和精馏过程的操作与控制。在粗甲醇成分既定的情况下,影响精甲醇质量的因素主要是精馏。GB338-92对精甲醇质量规定的... 相似文献
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小本体聚丙烯装置的丙烯液相常温精脱硫技术 总被引:1,自引:0,他引:1
分析了硫对丙烯聚合高效催化剂的影响,介绍了采用国产脱硫剂对液相丙烯进行常温精脱硫的情况。生产实践表明,在粗丙烯硫含量不大于10μg/g情况下,精丙烯硫含量可控制在1.0μg/g左右,使聚丙烯装置的产品质量和经济效益大为改善。 相似文献
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根据分离对甲基苯甲酸(PT)机理和物料平衡,分析影响产品中PT酸的因素,从粗对苯二甲酸(TA)质量和精制负荷、配料浓度、结晶器温度等方面加强控制,以保证PTA产品质量达到优级品。 相似文献
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我厂设有年处理粗苯3000t的精苯工序,酸焦油采用蒸汽蒸吹法处理,但由于酸焦油吹蒸釜腐蚀严重而被迫停用。1994年,精苯工段在加工广州市煤气公司油制气的粗苯时,由于轻质馏分多,CS_2和环戊二烯等不饱和化合物不易在初馏过程中切除干净。精制过程中生成的粘度极大、呈深黑色的酸焦油更难以处理,加工120多吨粗苯后被迫中断。 相似文献
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采用氧化-萃取-结晶-重结晶的方法,将环己烷氧化液酸洗水浓缩液进行氧化,再萃取出影响已二酸结晶的物质,结晶分离出粗己二酸,再对粗己二酸进行重结品,干燥得到精己二酸。结果表明:以氧化剂A和H_2O_2为氧化剂,氧化时间2h,氧化温度65℃,氧化液用萃取剂进行萃取,萃取后的水相在30℃结晶2h,再在35℃下重结晶,得到的己二酸纯度达到99.8%,收率约40%,熔点151.41℃。 相似文献
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Adipic acid is a white crystalline solid and is the most industrially important of all aliphatic dicarboxylic acids. Drying is the principal unit operation after its crystallization. The acid has a tendency to agglomerate when moistened, due to its high cohesiveness. The fluidization regime does not occur and the particles cannot be adequately treated in a conventional fluidized bed. This article deals with the drying of adipic acid in a vibrofluidized bed. The equipment used in the drying tests was specially designed and constructed to maintain the fluidized regime of fine particles of moistened adipic acid. The drying curves presented the constant and the falling rate periods, yielding final moisture contents that depend mainly on the drying temperature. The quality of the dried acid was also verified by the crystals' granulometric analysis, which showed breakage of crystals for drying at higher air temperatures. Results showed to be satisfactory for drying adipic acid with moisture content up to 5.1% w.b. in the vibrofluidized bed, keeping a high degree of bed homogeneity and quality of the fluidized state. 相似文献
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V. A. Silva-Moris 《Drying Technology》2013,31(3):303-313
ABSTRACT Adipic acid is a white crystalline solid and is the most industrially important of all aliphatic dicarboxylic acids. Drying is the principal unit operation after its crystallization. The acid has a tendency to agglomerate when moistened, due to its high cohesiveness. The fluidization regime does not occur and the particles cannot be adequately treated in a conventional fluidized bed. This article deals with the drying of adipic acid in a vibrofluidized bed. The equipment used in the drying tests was specially designed and constructed to maintain the fluidized regime of fine particles of moistened adipic acid. The drying curves presented the constant and the falling rate periods, yielding final moisture contents that depend mainly on the drying temperature. The quality of the dried acid was also verified by the crystals' granulometric analysis, which showed breakage of crystals for drying at higher air temperatures. Results showed to be satisfactory for drying adipic acid with moisture content up to 5.1% w.b. in the vibrofluidized bed, keeping a high degree of bed homogeneity and quality of the fluidized state. 相似文献
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分析了铝盐、锌盐两种体系制备的金红石粗品的质量差异,以及这两种体系制备粗品的适宜分散剂。介绍了钛白行业普遍应用的粉碎、分散和精磨设备组合的特点,以及不同设备组合对不同体系粗品和分散剂的适应性。 相似文献
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硅钨杂多酸催化合成己二酸二丁酯的研究 总被引:5,自引:1,他引:5
以硅钨杂多酸为催化剂,以己二酸和正丁醇为原料合成了己二酸二丁酯。通过正交实验考察了影响酯化率的各种因素,确定了最佳反应条件为:己二酸用量0.05 mol时,正丁醇与己二酸的物质的量比为2.6,催化剂0.3 g,15 mL甲苯作带水剂,回流温度下反应30 m in,酯化率达99%以上。 相似文献
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混合二元酸制备多元膦酸缓蚀阻垢剂研究 总被引:8,自引:0,他引:8
混合二元酸是环己烷氧化制己二酸生产过程中的副产品,其中含有丁二酸、戊二酸、己二酸等组分,其组成复杂,尽管价格便宜,但分离成本高,不经过分离进行综合利用受到很大的限制。实验不但成功地分别以戊二酸、己二酸为原料合成出新型的同碳二膦酸,而且根据多组分缓蚀阻垢剂的协同效应原理,采用组成复杂的混合二元酸一步合成出混合多元膦酸。对纯二元酸合成的产品和混合二元酸合成的产品缓蚀组垢性能进行了比较。实验结果表明,混合二元酸合成的产品作为水处理剂具有优良的缓蚀和阻垢作用。 相似文献