CN107915617A - 一种二氧化氯漂白反应中氯乙酸的生成方法 - Google Patents

一种二氧化氯漂白反应中氯乙酸的生成方法 Download PDF

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CN107915617A
CN107915617A CN201710994981.XA CN201710994981A CN107915617A CN 107915617 A CN107915617 A CN 107915617A CN 201710994981 A CN201710994981 A CN 201710994981A CN 107915617 A CN107915617 A CN 107915617A
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aox
solution
clo
reaction
chloroacetic
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王双飞
姚双全
覃程荣
高聪
聂双喜
王志伟
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Guangxi University
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Guangxi University
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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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites

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  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
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Abstract

本发明公开了一种二氧化氯漂白反应中氯乙酸的生成方法，属于清洁化制浆造纸领域。本发明选择D‑木糖、二氧化氯为原料，所述方法包括，制备一定浓度的D‑木糖溶液和二氧化氯溶液，调节溶液的pH值，反应温度60℃，反应时间60min。反应结束检测溶液中的AOX生成量，并利用气相色谱‑质谱联用分析溶液中AOX的组分。本实验方法简单易行，D‑木糖与二氧化氯在模拟漂白环境下反应生成AOX，为制浆造纸企业漂白废水AOX的进一步减量提供理论支撑。

Description

一种二氧化氯漂白反应中氯乙酸的生成方法
技术领域
本发明涉及一种二氧化氯漂白反应中氯乙酸的生成方法，属于清洁化制浆造纸领域。
背景技术
对于制浆造纸的AOX的研究尚在起步阶段，AOX归属于持久性有机污染物(POPs)，具有POPs的一切特性，短时间内自然界是无法消化排放到自身的AOX，其总量将呈现不断累积增大的趋势，对环境威胁也只会越来越大，如果不能有效遏制源头，这将是个恶性循环过程。结合我国的基本国情和国策，AOX排放限值只能进一步减小。概括国内外学者对于纸浆漂白过程AOX的研究思路发现，主要是通过了解AOX如何生成，通过掌握AOX的生成机理，从源头上减少AOX的生成量。研究者普遍认为未漂浆中的残余木质素是AOX的主要来源，并对二氧化氯与木质素反应生成AOX的机理进行了研究。
发明内容
本发明的目的是提供了一种二氧化氯漂白反应中氯乙酸的生成方法，属于清洁化制浆造纸领域。
本发明解决上述技术问题的技术方案如下：
1.D-木糖溶液制备：称取10gD-木糖溶于100mL蒸馏水溶液中，在室温下搅拌30min，封口备用。
2.反应液的制备：取步骤1制备的D-木糖溶液，调节溶液pH值到4，添加相对于D-木糖重量1.0％～3.0％的二氧化氯溶液。
3.反应产物分析：将反应步骤2制备的反应液置于60℃的水浴环境下反应60min。反应结束后测定溶液中AOX生成量以及分析AOX组分。测定结果：溶液中AOX生成量为0.89mg.mL-1～1.39mg.mL-1，反应中AOX只有一种组分为氯乙酸。
优选上述步骤2中二氧化氯溶液的添加量为D-木糖重量的3.0％，溶液中AOX生成量为1.39mg.mL-1，即氯乙酸的生成量为1.39mg.mL-1。
与现有技术相比，本发明具有以下有益效果：
本实验方法简单易行，D-木糖与二氧化氯在模拟漂白环境下反应生成AOX，为制浆造纸企业漂白废水AOX的进一步减量提供理论支撑。
具体实施方式
实施例1
一种二氧化氯漂白反应中氯乙酸的生成方法，操作步骤如下：
1.D-木糖溶液制备：称取10gD-木糖溶于100mL蒸馏水溶液中，在室温下搅拌30min，封口备用。
2.反应液的制备：取步骤1制备的D-木糖溶液，调节溶液pH值到4，添加相对于D-木糖重量的1.0％的二氧化氯溶液。
3.反应产物分析：将反应步骤2制备的反应液置于60℃的水浴环境下反应60min。反应结束后测定溶液中AOX生成量以及分析AOX组分。
测定结果：溶液中AOX生成量为0.89mg.mL-1，反应中AOX只有一种组分为氯乙酸，既氯乙酸生成量为0.89mg.mL-1。
实施例2
一种二氧化氯漂白反应中氯乙酸的生成方法，操作步骤如下：
1.与实例1步骤1相同。
2.反应液的制备：取步骤1制备的D-木糖溶液，调节溶液pH值到4，添加相对于D-木糖重量的2.0％的二氧化氯溶液。。
3.与实例1步骤3相同。
测定结果：溶液中AOX生成量为1.12mg.mL-1，反应中AOX只有一种组分为氯乙酸，既氯乙酸生成量为1.12mg.mL-1。
实施例3
一种二氧化氯漂白反应中氯乙酸的生成方法，操作步骤如下：
1.与实例1步骤1相同。
2.反应液的制备：取步骤1制备的D-木糖溶液，调节溶液pH值到4，添加相对于D-木糖重量的3.0％的二氧化氯溶液。
3.与实例1步骤3相同。
测定结果：溶液中AOX生成量为1.39mg.mL-1，反应中AOXAOX只有一种组分为氯乙酸，既氯乙酸生成量为1.39mg.mL-1。
需要说明的是，以上列举的仅是本发明的若干个具体实施例。显然，本发明不限于以上实施例，还可以有许多变形。本领域的普通技术人员能从本发明公开的内容直接导出或联想到的所有变形，均应认为是本发明的保护范围。

Claims (2)

1.一种二氧化氯漂白反应中氯乙酸的生成方法，其特征在于，所述方法操作步骤如下：
(1)D-木糖溶液制备：称取10gD-木糖溶于100mL蒸馏水溶液中，在室温下搅拌30min，封口备用；
(2)反应液的制备：取步骤(1)制备的D-木糖溶液，调节溶液pH值到4，添加相对于D-木糖重量1.0％～3.0％的二氧化氯溶液；
(3)反应产物分析：将反应步骤(2)制备的反应液置于60℃的水浴环境下反应60min。反应结束后测定溶液中AOX生成量以及分析AOX组分。测定结果：溶液中AOX生成量为0.89mg.mL-1～1.39mg.mL-1，反应中AOX只有一种组分为氯乙酸。
2.根据权利要求1所述的一种二氧化氯漂白反应中AOX的生成方法，其特征在于，所述步骤(2)中二氧化氯溶液的添加量为D-木糖重量的3.0％，溶液中AOX生成量为1.39mg.mL-1，即氯乙酸的生成量为1.39mg.mL-1。
CN201710994981.XA 2017-10-23 2017-10-23 一种二氧化氯漂白反应中氯乙酸的生成方法 Pending CN107915617A (zh)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009081714A1 (ja) * 2007-12-20 2009-07-02 Mitsubishi Gas Chemical Company, Inc. 漂白パルプの製造方法
CN104695265A (zh) * 2015-03-26 2015-06-10 广西大学 一种利用木聚糖酶辅助纸浆二氧化氯漂白减少aox生成的方法
CN106588629A (zh) * 2016-11-24 2017-04-26 广西大学 一种提高木糖与二氧化氯反应中氯乙酸浓度的方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009081714A1 (ja) * 2007-12-20 2009-07-02 Mitsubishi Gas Chemical Company, Inc. 漂白パルプの製造方法
CN104695265A (zh) * 2015-03-26 2015-06-10 广西大学 一种利用木聚糖酶辅助纸浆二氧化氯漂白减少aox生成的方法
CN106588629A (zh) * 2016-11-24 2017-04-26 广西大学 一种提高木糖与二氧化氯反应中氯乙酸浓度的方法

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Application publication date: 20180417