CN106608818A - 一种邻甲基苯氧乙酸生产工艺 - Google Patents

一种邻甲基苯氧乙酸生产工艺 Download PDF

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Publication number
CN106608818A
CN106608818A CN201510806321.5A CN201510806321A CN106608818A CN 106608818 A CN106608818 A CN 106608818A CN 201510806321 A CN201510806321 A CN 201510806321A CN 106608818 A CN106608818 A CN 106608818A
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conducted
solution
cresol
chloroacetic acid
production technology
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胡江海
张晓磊
于飞
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Ningxia Jihua Environmental Safety Technology Co Ltd
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Ningxia Jihua Environmental Safety Technology Co Ltd
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Priority to CN201510806321.5A priority Critical patent/CN106608818A/zh
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
    • C07C51/367—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by introduction of functional groups containing oxygen only in singly bound form

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

邻甲基苯氧乙酸生产工艺流程，工艺流程简述：向氯乙酸溶解釜中加入一定量的氯乙酸与水，转料至氯乙酸计量罐。向缩合釜中投入定量熔融的邻甲酚（桶装邻甲酚在熔解池经60-80℃热水熔融）升温至120-125℃后，缓慢加入氯乙酸溶液，保温2-2.5小时进行缩合反应。当反应釜中溶液粘稠不利于反应，这时向反应釜中滴加30%的氢氧化钠溶液，降低溶液的粘稠度，利于反应进一步进行。待反应完全后，蒸馏回收邻甲酚套用于生产。酸化釜升温至90℃，滴加31%盐酸调至pH=5-6，结束反应，冷却结晶，放料至抽滤槽，滤液去污水处理站处理；并用水洗涤滤饼，洗涤水去污水处理站处理，滤饼送至闪蒸干燥机烘干，得邻甲基苯氧乙酸成品，包装入库。

Description

一种邻甲基苯氧乙酸生产工艺
邻甲基苯氧乙酸生产工艺流程 ⑴反应原理 主反应：
副反应：
工艺流程简述 向氯乙酸溶解釜中加入一定量的氯乙酸与水，转料至氯乙酸计量罐。向缩合釜中投入定量熔融的邻甲酚（桶 装邻甲酚在熔解池经 60-80℃热水熔融）升温至120-125℃后，缓慢加入氯乙酸溶液，保温 2-2.5 小时进行缩合反应。当反应釜中溶液粘稠不利于反应，这时向反应釜中滴加 30%的氢氧化钠溶液， 降低溶液的粘稠度， 利于反应进一步进行。 待反应完全后，蒸馏回收邻甲酚套用于生产。
酸化釜升温至 90℃，滴加 31%盐酸调至 pH=5-6，结束反应，冷却结晶，放料至抽滤槽，滤液去污水处理站处理；并用水洗涤滤饼，洗涤水去污水处理站处理，滤饼送至闪蒸干燥机烘干，得邻甲基苯氧乙酸成品，包装入库。 项目反应收率为 98%（以氯乙酸计），95%（以邻甲酚计）。

Claims (2)

1.一种邻甲基苯氧乙酸生产工艺。
2.邻甲基苯氧乙酸生产过程中原料成分及配比。
CN201510806321.5A 2015-11-20 2015-11-20 一种邻甲基苯氧乙酸生产工艺 Pending CN106608818A (zh)

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CN201510806321.5A CN106608818A (zh) 2015-11-20 2015-11-20 一种邻甲基苯氧乙酸生产工艺

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CN201510806321.5A CN106608818A (zh) 2015-11-20 2015-11-20 一种邻甲基苯氧乙酸生产工艺

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CN106608818A true CN106608818A (zh) 2017-05-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114870751A (zh) * 2022-06-10 2022-08-09 山东潍坊润丰化工股份有限公司 一种邻甲基苯氧乙酸钠连续制备系统及方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104945240A (zh) * 2015-06-01 2015-09-30 安徽华星化工有限公司 一种2-甲基-4-氯苯氧乙酸的合成方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104945240A (zh) * 2015-06-01 2015-09-30 安徽华星化工有限公司 一种2-甲基-4-氯苯氧乙酸的合成方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114870751A (zh) * 2022-06-10 2022-08-09 山东潍坊润丰化工股份有限公司 一种邻甲基苯氧乙酸钠连续制备系统及方法

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Application publication date: 20170503