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WO2018039848A1 - Procédé de récupération de tétrahydrofurane - Google Patents

Procédé de récupération de tétrahydrofurane Download PDF

Info

Publication number
WO2018039848A1
WO2018039848A1 PCT/CN2016/097112 CN2016097112W WO2018039848A1 WO 2018039848 A1 WO2018039848 A1 WO 2018039848A1 CN 2016097112 W CN2016097112 W CN 2016097112W WO 2018039848 A1 WO2018039848 A1 WO 2018039848A1
Authority
WO
WIPO (PCT)
Prior art keywords
tetrahydrofuran
oil
vacuum pump
water content
solution
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.)
Ceased
Application number
PCT/CN2016/097112
Other languages
English (en)
Chinese (zh)
Inventor
沈建美
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to PCT/CN2016/097112 priority Critical patent/WO2018039848A1/fr
Publication of WO2018039848A1 publication Critical patent/WO2018039848A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
    • C07D307/04—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
    • C07D307/06—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to ring carbon atoms
    • C07D307/08—Preparation of tetrahydrofuran

Definitions

  • the invention relates to a compound herbicide, belonging to the field of chemical substance recovery and treatment.
  • Tetrahydrofuran is an organic solvent with excellent performance and is widely used in pharmaceutical and chemical production.
  • the industrial waste liquid produced by the pharmaceutical and chemical production of tetrahydrofuran is processed by atmospheric distillation. Since tetrahydrofuran is difficult to be separated from water by azeotropy, it cannot be directly used for production; if the waste liquid is directly discharged into the sewage treatment system, It has increased the difficulty of sewage treatment, polluting the environment, and causing waste of resources.
  • a variety of tetrahydrofuran recovery treatment processes have been developed in the prior art, but these processes are complicated in process, long in time and low in efficiency. Therefore, it is urgent to develop a compound herbicide with simple process, short time and high efficiency. Upon search, no technical solutions identical or similar to the present invention were found.
  • the technical problem to be solved by the present invention is to provide a compound herbicide which is simple in process, short in time and high in efficiency.
  • the technical solution of the present invention is: a compounding herbicide, and the innovation is that the recycling process is as follows:
  • a liquid moisture detector is arranged in the vacuum distiller to detect the water content in the solution, and when the moisture is less than 5%, the operation can be stopped.
  • the invention discloses a compound herbicide, and the recycling process is as follows:
  • the recovery time of tetrahydrofuran in this example requires a total of 55 minutes.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

L'invention concerne un procédé de récupération de tétrahydrofurane, comprenant les étapes consistant à : tester d'abord la concentration de tétrahydrofurane préparée, et verser le tétrahydrofurane lorsque la teneur en eau de celui-ci est supérieure à 10 %, dans une pompe à vide sans huile et effectuer un traitement de pompage sous vide sur celle-ci; puis ajouter du permanganate de potassium à la pompe à vide sans huile, et effectuer un traitement d'oxydation sous agitation ; puis ajouter un catalyseur à la fin de l'oxydation, faire réagir à une température de 50 °C pendant 50 min ; et enfin verser la solution dans un distillateur à pression réduite et effectuer une distillation à pression réduite, faire la collection de 90 % d'une fraction, et enfin obtenir du tétrahydrofurane avec une teneur en eau inférieure à 5 %. Les avantages du procédé sont les suivants : en ajoutant un agent oxydant spécial, l'indice d'oxydabilité du tétrahydrofurane satisfait la norme de qualité, le nombre de distillations est diminué, et la consommation d'énergie est réduite ; et par l'utilisation d'une pompe à vide sans huile pour le pompage sous vide, un gaz résiduaire propre est obtenu.
PCT/CN2016/097112 2016-08-29 2016-08-29 Procédé de récupération de tétrahydrofurane Ceased WO2018039848A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2016/097112 WO2018039848A1 (fr) 2016-08-29 2016-08-29 Procédé de récupération de tétrahydrofurane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2016/097112 WO2018039848A1 (fr) 2016-08-29 2016-08-29 Procédé de récupération de tétrahydrofurane

Publications (1)

Publication Number Publication Date
WO2018039848A1 true WO2018039848A1 (fr) 2018-03-08

Family

ID=61299747

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/097112 Ceased WO2018039848A1 (fr) 2016-08-29 2016-08-29 Procédé de récupération de tétrahydrofurane

Country Status (1)

Country Link
WO (1) WO2018039848A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1370774A (zh) * 2001-02-27 2002-09-25 天津药业集团有限公司 四氢呋喃的回收工艺
CN101555238A (zh) * 2009-05-21 2009-10-14 广西万德药业股份有限公司 四氢呋喃回收的方法
CN101914077A (zh) * 2010-09-13 2010-12-15 东瑞（南通）医药科技有限公司 四氢呋喃的回收工艺
CN102596926A (zh) * 2009-10-30 2012-07-18 株式会社日立工业设备技术 四氢呋喃的精制方法以及精制系统
CN103408514A (zh) * 2013-08-20 2013-11-27 江苏九天高科技股份有限公司 一种渗透汽化法回收四氢呋喃的工艺及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1370774A (zh) * 2001-02-27 2002-09-25 天津药业集团有限公司 四氢呋喃的回收工艺
CN101555238A (zh) * 2009-05-21 2009-10-14 广西万德药业股份有限公司 四氢呋喃回收的方法
CN102596926A (zh) * 2009-10-30 2012-07-18 株式会社日立工业设备技术 四氢呋喃的精制方法以及精制系统
CN101914077A (zh) * 2010-09-13 2010-12-15 东瑞（南通）医药科技有限公司 四氢呋喃的回收工艺
CN103408514A (zh) * 2013-08-20 2013-11-27 江苏九天高科技股份有限公司 一种渗透汽化法回收四氢呋喃的工艺及装置

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