CN106748660A - 一种对苯二酚生产工艺 - Google Patents

一种对苯二酚生产工艺 Download PDF

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Publication number
CN106748660A
CN106748660A CN201510807119.4A CN201510807119A CN106748660A CN 106748660 A CN106748660 A CN 106748660A CN 201510807119 A CN201510807119 A CN 201510807119A CN 106748660 A CN106748660 A CN 106748660A
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butyl acetate
sloughed
finished product
rectifying
pressure
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CN201510807119.4A
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English (en)
Inventor
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 CN201510807119.4A priority Critical patent/CN106748660A/zh
Publication of CN106748660A publication Critical patent/CN106748660A/zh
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
    • C07C37/01—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by replacing functional groups bound to a six-membered aromatic ring by hydroxy groups, e.g. by hydrolysis
    • C07C37/045—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by replacing functional groups bound to a six-membered aromatic ring by hydroxy groups, e.g. by hydrolysis by substitution of a group bound to the ring by nitrogen
    • C07C37/05—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by replacing functional groups bound to a six-membered aromatic ring by hydroxy groups, e.g. by hydrolysis by substitution of a group bound to the ring by nitrogen by substitution of a NH2 group

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

对苯二酚是一种重要的化工产品。工艺流程：将对氨基苯酚、硫酸及水在成盐釜中成硫酸盐后，用泵进入高压反应釜中进行水解反应，水解反应单程转化率为92%。反应以导热油为热载体，利用循环油泵强制循环，将温度控制在230℃，压力为3.5MPa反应2小时，保温10小时后开始连续进料和出料。水解液先进入闪蒸蒸发釜，将压力释放为常压，在此过程中物料会蒸发掉25%的水分（以水蒸气和硫酸雾形式）（G2-1）。该水解浓缩液用三效浓缩器浓缩至原体积的50%，冷却后约有占成品总量的75%的粗品析出，过滤，滤液用醋酸丁酯进行萃取，利用分层，分离出醋酸丁酯层，该工序产生分离废水W1-1。接下来进入脱溶工序，将醋酸丁酯层进行加热，利用沸点差，将醋酸丁酯脱去（脱去的醋酸丁酯经冷凝回用于萃取工序，冷凝温度为50℃。该工序有不凝气体G2-2产生）。将脱去醋酸丁酯的料液和粗品酚一起进一步精馏，精馏条件为真空状况下用导热油加热至250℃左右，蒸出成品，该工序有不凝气体G2-1及釜残S2-1产生。将精馏成品冷却后用切片机切片后包装，入库。产品收率为89%。

Description

一种对苯二酚生产工艺
（1） 化学反应方程式：
①水解工序：
②副反应：
（2）工艺流程：
将对氨基苯酚、硫酸及水在成盐釜中成硫酸盐后，用泵进入高压
反应釜中进行水解反应，水解反应单程转化率为92%。反应以导热油为热载体，利用循环油泵强制循环，将温度控制在230℃，压力为3.5M Pa 反应2 小时，保温10 小时后开始连续进料和出料。水解液先进入闪蒸蒸发釜，将压力释放为常压，在此过程中物料会蒸发掉25%的水分（以水蒸气和硫酸雾形式）（G2-1）。该水解浓缩液用三效浓缩器浓缩至原体积的50%，冷却后约有占成品总量的75%的粗品析出，过滤，滤液用醋酸丁酯进行萃取，利用分层，分离出醋酸丁酯层，该工序产生分离废水W1-1。接下来进入脱溶工序，将醋酸丁酯层进行加热，利用沸点差，将醋酸丁酯脱去（脱去的醋酸丁酯经冷凝回用于萃取工序，冷凝温度为50℃。该工序有不凝气体G2-2 产生）。将脱去醋酸丁酯的料液和粗品酚一起进一步精馏，精馏条件为真空状况下用导热油加热至250℃左右，蒸出成品，该工序有不凝气体G2-1 及釜残S2-1 产生。将精馏成品冷却后用切片机切片后包装，入库。产品收率为89%。

Claims (2)

1.一种对苯二酚生产工艺。
2.对苯二酚生产涉及的原料成分及配比。
CN201510807119.4A 2015-11-22 2015-11-22 一种对苯二酚生产工艺 Pending CN106748660A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510807119.4A CN106748660A (zh) 2015-11-22 2015-11-22 一种对苯二酚生产工艺

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510807119.4A CN106748660A (zh) 2015-11-22 2015-11-22 一种对苯二酚生产工艺

Publications (1)

Publication Number Publication Date
CN106748660A true CN106748660A (zh) 2017-05-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510807119.4A Pending CN106748660A (zh) 2015-11-22 2015-11-22 一种对苯二酚生产工艺

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CN (1) CN106748660A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110818534A (zh) * 2019-11-08 2020-02-21 浙江孚诺医药股份有限公司 氢醌生产工艺

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110818534A (zh) * 2019-11-08 2020-02-21 浙江孚诺医药股份有限公司 氢醌生产工艺
CN110818534B (zh) * 2019-11-08 2022-11-11 浙江孚诺医药股份有限公司 氢醌生产工艺

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Application publication date: 20170531