CN101830833B - 药用尿素的精制方法 - Google Patents

药用尿素的精制方法 Download PDF

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Publication number
CN101830833B
CN101830833B CN2010101815923A CN201010181592A CN101830833B CN 101830833 B CN101830833 B CN 101830833B CN 2010101815923 A CN2010101815923 A CN 2010101815923A CN 201010181592 A CN201010181592 A CN 201010181592A CN 101830833 B CN101830833 B CN 101830833B
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urea
mixture
agricultural
industrial
refining
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CN101830833A (zh
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符爱清
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Shanghai Xudong Hepu Nantong Pharmaceutical Co., Ltd.
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符爱清
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Abstract

本发明公开了一种药用尿素的精制方法，将乙醇与农用尿素或工业尿素一起在75～80℃回流10～50分钟；然后冷却至5～70℃，并进一步过滤，40-120℃下减压加热干燥。本发明以农用尿素或工业尿素为原料，制作方法简单，易操作。

Description

药用尿素的精制方法
技术领域：
本发明涉及一种药用尿素的精制方法。
背景技术：
现有的农用尿素、工业尿素因纯度低，不能作为药用。
发明内容：
本发明的目的在于提供一种以农用尿素或工业尿素为原料的药用尿素的精制方法。
本发明的技术解决方案是：
一种药用尿素的精制方法，其特征是：将乙醇与农用尿素或工业尿素一起在75～80℃回流10～50分钟；然后冷却至5～70℃，并进一步过滤，40-120℃下减压加热干燥。
乙醇与农用尿素或工业尿素的重量比为2-8∶1。
本发明以农用尿素或工业尿素为原料，制作方法简单，易操作。
下面结合实施例对本发明作进一步说明。
具体实施方式：
一种药用尿素的精制方法，将乙醇与农用尿素或工业尿素一起在75～80℃(例75℃、78℃、80℃)回流10～50分钟(例10分钟、30分钟、50分钟)；然后冷却至5～70℃(例5℃、40℃、70℃)，并进一步过滤，40-120℃(例45℃、88℃、120℃)下减压加热干燥。乙醇与农用尿素或工业尿素的重量比为2-8∶1(例2∶1、4∶1、8∶1)。

Claims (1)

1.一种药用尿素的精制方法，其特征是：将乙醇与农用尿素或工业尿素一起在75～80℃回流10～50分钟；然后冷却至5～70℃，并进一步过滤，40-120℃下减压加热干燥；乙醇与农用尿素或工业尿素的重量比为2-8∶1。
CN2010101815923A 2010-05-25 2010-05-25 药用尿素的精制方法 Active CN101830833B (zh)

Priority Applications (1)

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CN2010101815923A CN101830833B (zh) 2010-05-25 2010-05-25 药用尿素的精制方法

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CN2010101815923A CN101830833B (zh) 2010-05-25 2010-05-25 药用尿素的精制方法

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CN101830833A CN101830833A (zh) 2010-09-15
CN101830833B true CN101830833B (zh) 2012-03-21

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101914041B (zh) * 2010-08-20 2012-03-21 符爱清 药用尿素的精制方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
陈五平.第二篇 尿素.《无机化工工艺学：第三版 上册，合成氨、尿素、硝酸、硝酸铵》.2002, *
魏明等.尿素的结晶习性和晶体缺陷研究.《人工晶体学报》.1988, *

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Application publication date: 20100915

Assignee: Nantong Haiers Pharmaceutical Co., Ltd.

Assignor: Fu Aiqing

Contract record no.: 2013320000304

Denomination of invention: Refining method for medicinal urea

Granted publication date: 20120321

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Address after: 226400 No. 9, Chen Gao Industrial Park, dugong Town, Rudong County, Nantong, Jiangsu.

Patentee after: Shanghai Xudong Hepu Nantong Pharmaceutical Co., Ltd.

Address before: 226400 No. 9, Chen Gao Industrial Park, Rudong County, Nantong, Jiangsu.

Patentee before: Fu Aiqing