CN113336698A - 一种4-三氟甲基烟酸中母液的回收方法 - Google Patents

一种4-三氟甲基烟酸中母液的回收方法 Download PDF

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CN113336698A
CN113336698A CN202110595791.7A CN202110595791A CN113336698A CN 113336698 A CN113336698 A CN 113336698A CN 202110595791 A CN202110595791 A CN 202110595791A CN 113336698 A CN113336698 A CN 113336698A
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nicotinic acid
kettle
trifluoromethyl nicotinic
mother liquor
distillation
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杨乐
杨志健
张正颂
沈东东
易建康
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Anhui Jinhe Industrial Co Ltd
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    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D213/00Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/78Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D213/79Acids; Esters
    • C07D213/80Acids; Esters in position 3
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D213/00Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/78Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D213/79Acids; Esters
    • C07D213/803Processes of preparation

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Abstract

本发明涉及一种4‑三氟甲基烟酸中母液的回收方法,其特征在于包括如下步骤:(1)将减压脱溶提取4‑三氟甲基烟酸后的溶液放入萃取釜,控制釜温20~70℃;(2)按溶液与萃取溶剂体积比1:0.3~1.5加萃取剂;(3)搅拌0.5~1.5小时,静置0.5~2小时,分出水相去废水处理系统,有机相去蒸馏釜;(4)采用减压蒸馏,控制蒸馏釜真空度为‑0.085~0.095 Mpa,控制釜温在70~80℃,蒸馏60~120min;(5)将蒸馏釜降温至10~15℃,加盐酸调节PH至2~2.5,结束后控制釜温在0~5℃,搅拌结晶1~2小时;(6)离心得4‑三氟甲基烟酸,离心后的母液去废水处理系统。本发明优点:采用正丁醇或正戊醇作为萃取剂,具有优异的萃取效果,相比于简单的对母液进行浓缩结晶来说,能耗更小。

Description

一种4-三氟甲基烟酸中母液的回收方法
技术领域
本发明属化学药物制备领域,涉及一种医药中间体,具体涉及一种4-三氟甲基烟酸中母液的回收方法。
背景技术
4-三氟甲基烟酸是一种含有三氟甲基和吡啶环的芳香族化合物,因其具有独特的生物学活性,而广泛的应用于新农药创制和医药中间体的研发中;氟啶虫酰胺(flonicamid)是由日本石原产业株式会社开发的吡啶酰胺类杀虫剂,它可以有效防治作物上的刺吸式口器害虫,对蚜虫尤其高效;其作用机理新颖,与目前市售其他新烟碱类杀虫剂无交互抗性,对蜜蜂低毒。
专利公开号CN112079772A中公开了一种4-三氟甲基烟酸中氨化反应的方法,在该专利中采用乙烯基乙醚加上三氟乙酸在吡啶碱的催化下用甲基磺酰氯进行氯化,采用氨水对氯化液进行氨化,反应经萃取、减压脱溶制得4-三氟甲基烟酸。现有生产中减压脱溶提取产品后的溶液多是作为废水处理;但经液相色谱检测发现,该部分作为废水处理的溶液中仍含有约10%左右的成品(4-三氟甲基烟酸),直接外排不仅造成了产品的浪费,同时也增加了污水的处理难度。
发明内容
本发明的目的是为了解决现有专利公开号CN112079772A中减压脱溶提取成品4-三氟甲基烟酸后的溶液中仍含有10%左右的成品,直接外排不仅造成产品的浪费,同时也增加污水处理难度的问题,提供一种4-三氟甲基烟酸中母液的回收方法。
为了解决上述目的,本发明采用的技术方案如下:
一种4-三氟甲基烟酸中母液的回收方法,其特征在于包括如下步骤:
(1)将减压脱溶提取4-三氟甲基烟酸后的溶液(含8-12% 4-三氟甲基烟酸及少量有机杂质和氯化钠盐)放入萃取釜,控制釜温在20~70℃之间;
(2)按溶液与萃取溶剂(正丁醇或正戊醇)的体积比为1:0.3~1.5加入萃取剂;
(3)随后搅拌0.5~1.5小时,静置0.5~2小时,分出水相去废水处理系统,有机相去蒸馏釜;
(4)采用减压蒸馏,控制蒸馏釜真空度为-0.085~0.095 Mpa,控制蒸馏釜釜温在70~80℃,蒸馏 60~120min;
(5)蒸馏结束后将蒸馏釜降温至10~15℃,滴加盐酸调节PH至2~2.5,滴加结束后控制釜温在0~5℃,搅拌结晶1~2小时;
(6)离心得4-三氟甲基烟酸(含量91-95%,纯度在91-96%),离心后的母液(经检测,4-三氟甲基烟酸的含量<0.5%)去废水处理系统。
本发明的有益效果:
1.本发明采用萃取的方法进行回收,操作简单,萃取后重新调节PH,能够更有效的将原来部分中间态产品转变成产品(4-三氟甲基烟酸),增加回收的效果;
2.本发明采用可与水分层的正丁醇或正戊醇作为萃取剂,具有优异的萃取效果,相比于简单的对母液进行浓缩结晶来说,能耗更小(由原来的蒸汽吨耗1.2-1.5降低至蒸汽吨耗0.8-1.0),产品纯度更高(由原来的85-88%升至93-95%);
3.对本发明处理后的离心母液进行检测,测得母液中4-三氟甲基烟酸的含量<0.5%心获得的4-三氟甲基烟酸纯度在93-95%。
具体实施方式
一种4-三氟甲基烟酸中母液的回收方法,具体实施步骤如下:
实施例1
(1)将减压脱溶提取4-三氟甲基烟酸后的溶液(含10% 4-三氟甲基烟酸、5%有机杂质、5%氯化钠盐)800L放入萃取釜,控制釜温在40℃;
(2)向萃取釜内加入正丁醇500L;
(3)搅拌1小时,静置0.5小时,分出水相去废水处理系统,有机相去蒸馏釜;
(4)对蒸馏釜进行减压蒸馏,控制真空度为-0.09 Mpa,釜温在75℃,蒸馏 80min;
(5)蒸馏结束后降温至10℃,滴加盐酸(浓度32%,调节PH至2.0,滴加结束控制釜温在2℃,搅拌结晶1.5小时;
(6)离心得到4-三氟甲基烟酸15.5Kg(产品纯度95.1%,产品含量93.2%),离心母液作为废水进行处理,经检测测得废水中4-三氟甲基烟酸含量为0.5%。
实施例2
(1)将减压脱溶提取4-三氟甲基烟酸后的溶液(含11% 4-三氟甲基烟酸、5%有机杂质、5%氯化钠盐)800L放入萃取釜,控制釜温在30℃;
(2)向萃取釜内加入正戊醇510L;
(3)搅拌1.5小时,静置1小时,分出水相去废水处理系统,有机相去蒸馏釜;
(4)对蒸馏釜进行减压蒸馏,控制真空度我-0.085 Mpa,釜温在78℃,蒸馏70min;
(5)蒸馏结束后降温至12℃,滴加盐酸(浓度32%),调节PH至2.1,滴加结束控制釜温在5℃,搅拌结晶2小时;
(6)离心的4-三氟甲基烟酸16.5Kg(产品纯度92.2%,产品含量93.2%),离心母液作为废水进行处理,经检测测得废水中4-三氟甲基烟酸含量为0.3%。
实施例3
(1)将减压脱溶提取4-三氟甲基烟酸后的溶液(含12% 4-三氟甲基烟酸、5%有机杂质、5%氯化钠盐)800L放入萃取釜,控制釜温在37℃;
(2)向萃取釜内加入正丁醇530L;
(3)搅拌1.2小时,静置1.2小时,分出水相去废水处理系统,有机相去蒸馏釜;
(4)对蒸馏釜进行减压蒸馏,控制真空度为-0.095 Mpa,釜温在73℃,蒸馏90min;
(5)蒸馏结束后降温至11℃,滴加盐酸(浓度32%),调节PH至2.5,滴加结束控制釜温在3℃,搅拌结晶1.5小时;
(6)离心的4-三氟甲基烟酸16.5Kg(产品纯度91.2%,产品含量94.2%),离心母液作为废水进行处理,经检测测得废水中4-三氟甲基烟酸含量为0.4%。
对比实施例1
(1)将减压脱溶提取4-三氟甲基烟酸后的溶液(含10% 4-三氟甲基烟酸、5%有机杂质、5%氯化钠盐)800L放入萃取釜,控制釜温在40℃;
(2)向萃取釜内加入甲苯510L;
(3)搅拌1小时,静置0.5小时,分出水相去废水处理系统,有机相去蒸馏釜;
(4)对蒸馏釜进行减压蒸馏,真空度-0.09 Mpa,釜温在75℃,蒸馏 80min;
(5)蒸馏结束后降温至10℃,滴加盐酸,调节PH至2,滴加结束控制釜温在2℃,搅拌结晶1.5小时;
(6)离心的4-三氟甲基烟酸2.5Kg(产品纯度92.%,产品含量91.%),离心母液作为废水进行处理,经检测测得废水中4-三氟甲基烟酸含量为7.1%。

Claims (4)

1.一种4-三氟甲基烟酸中母液的回收方法,其特征在于包括如下步骤:
(1)将减压脱溶提取4-三氟甲基烟酸后的溶液放入萃取釜,控制釜温在20~70℃之间;
(2)按溶液与萃取溶剂的体积比为1:0.3~1.5加入萃取剂;
(3)随后搅拌0.5~1.5小时,静置0.5~2小时,分出水相去废水处理系统,有机相去蒸馏釜;
(4)采用减压蒸馏,控制蒸馏釜真空度为-0.085~0.095 Mpa,控制蒸馏釜釜温在70~80℃,蒸馏 60~120min;
(5)蒸馏结束后将蒸馏釜降温至10~15℃,滴加盐酸调节PH至2~2.5,滴加结束后控制釜温在0~5℃,搅拌结晶1~2小时;
(6)离心得4-三氟甲基烟酸,离心后的母液去废水处理系统。
2.根据权利要求1所述一种4-三氟甲基烟酸中母液的回收方法,其特征在于:所述步骤(1)中减压脱溶提取4-三氟甲基烟酸后的溶液中含8-12% 4-三氟甲基烟酸及少量有机杂质和氯化钠盐。
3.根据权利要求1或2所述一种4-三氟甲基烟酸中母液的回收方法,其特征在于:所述步骤(2)中萃取剂为正丁醇或正戊醇。
4.根据权利要求1或2所述一种4-三氟甲基烟酸中母液的回收方法,其特征在于:所述步骤(6)中离心得到的4-三氟甲基烟酸的含量在91-95%,纯度在91-96%;离心后的母液中4-三氟甲基烟酸的含量<0.5%。
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