CN1038087A - 精萘的生产方法 - Google Patents

精萘的生产方法 Download PDF

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Publication number
CN1038087A
CN1038087A CN 88107194 CN88107194A CN1038087A CN 1038087 A CN1038087 A CN 1038087A CN 88107194 CN88107194 CN 88107194 CN 88107194 A CN88107194 A CN 88107194A CN 1038087 A CN1038087 A CN 1038087A
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CN
China
Prior art keywords
naphthalene
thick
refined
solvent
refined naphthalene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
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CN 88107194
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English (en)
Inventor
赵德普
刘积灵
唐东波
阎丽萍
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Jilin Institute of Chemical Technology
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Jilin Institute of Chemical Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Jilin Institute of Chemical Technology filed Critical Jilin Institute of Chemical Technology
Priority to CN 88107194 priority Critical patent/CN1038087A/zh
Publication of CN1038087A publication Critical patent/CN1038087A/zh
Granted legal-status Critical Current

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Abstract

本方法是采用溶剂重结晶法,由粗萘直接制得精 萘。采用熔点为76℃含萘为93%~95%的粗萘,在 温度20~60℃与溶剂按3~5毫升/克比例经过重 结晶后,即可得到合格精萘。

Description

本方法是采用溶剂重结晶法,由粗萘直接制取精萘。
历来,精萘生产多采用减压蒸馏法。此法有消耗能量大,设备庞杂并需减压操作,设备条件要求严格,操作也比较严苛,尤其因为操作温度较高而带来萘的损失和环境污染等缺点。
本方法克服了上述诸种缺点,避免了高温操作,也不需用减压真空操作。因此具有能耗低,因过程均在常压下操作致使装置、设备的操作简单,设备结构也很简单。由于在常温或较低温度下进行操作,所以大大减少了萘的损失和环境污染,溶剂又可循环利用,致使生产成本降低等优点。
本方法是以醇类为溶剂,采用熔点为76℃,含萘93~95%的粗萘,在温度于20~60℃条件下,与溶剂按3~5毫升/克粗萘的比例,经过重结晶后,即可达到合格产品。
本方法既适合于大规模现代化企业,也适用于中小型企业。该方法精萘总收率为80%以上,纯度可达到98%,色泽洁白,溶剂损失在5~10%以下,可按生产实际的需要,生产不同质量标准的精萘产品。
实例1
1、取熔点为76℃粗萘50克,加入醇类溶剂140毫升,重结晶二次,在温度为25℃条件下过滤分离得熔点为79.6℃的精萘41克。
实例2
2、上例粗萘,经过三次重结晶,在25℃条件下获得熔点约80℃精萘,纯度为99%以上,精萘总收率为80%。

Claims (2)

1、一种由粗萘生产精萘的方法,其特征在于使用含粗萘为93%~95%以醇类为溶剂重结晶后直接获得精萘。
2、按照权力要求(1)所述的方法,其特征在于粗萘,在温度为20~60℃,与溶剂配比按3~5毫升/克粗萘,在常压下进行重结晶。
CN 88107194 1988-10-12 1988-10-12 精萘的生产方法 Granted CN1038087A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 88107194 CN1038087A (zh) 1988-10-12 1988-10-12 精萘的生产方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 88107194 CN1038087A (zh) 1988-10-12 1988-10-12 精萘的生产方法

Publications (1)

Publication Number Publication Date
CN1038087A true CN1038087A (zh) 1989-12-20

Family

ID=4834556

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 88107194 Granted CN1038087A (zh) 1988-10-12 1988-10-12 精萘的生产方法

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Country Link
CN (1) CN1038087A (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101412652A (zh) * 2007-10-19 2009-04-22 北京石油化工学院 从工业萘制备精萘的新工艺
CN114315792A (zh) * 2020-09-30 2022-04-12 宝武炭材料科技有限公司 溶剂结晶耦合萃取精馏法从硫茚和萘的混合物中富集硫茚的方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101412652A (zh) * 2007-10-19 2009-04-22 北京石油化工学院 从工业萘制备精萘的新工艺
CN101412652B (zh) * 2007-10-19 2013-04-17 北京石油化工学院 从工业萘制备精萘的工艺
CN114315792A (zh) * 2020-09-30 2022-04-12 宝武炭材料科技有限公司 溶剂结晶耦合萃取精馏法从硫茚和萘的混合物中富集硫茚的方法
CN114315792B (zh) * 2020-09-30 2023-06-23 宝武碳业科技股份有限公司 溶剂结晶耦合萃取精馏法从硫茚和萘的混合物中富集硫茚的方法

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