CN101914041B - 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
CN101914041B
CN101914041B CN2010102580022A CN201010258002A CN101914041B CN 101914041 B CN101914041 B CN 101914041B CN 2010102580022 A CN2010102580022 A CN 2010102580022A CN 201010258002 A CN201010258002 A CN 201010258002A CN 101914041 B CN101914041 B CN 101914041B
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urea
medicinal
solvent
agricultural
alcoholic solvent
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CN101914041A (zh
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符爱清
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Shanghai Xudong Hepu Nantong Pharmaceutical Co Ltd
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Abstract

本发明公开了一种药用尿素的精制方法,将水、醇类溶剂或醚类溶剂与农用尿素或工业尿素一起在10~100℃回流10~120分钟;然后冷却结晶,结晶温度为-20~50℃,并进一步过滤、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:将水、醇类溶剂或醚类溶剂与农用尿素或工业尿素一起在10~100℃回流10~120分钟;然后冷却结晶,结晶温度为-20~50℃,并进一步过滤、干燥。
水、醇类溶剂或醚类溶剂与农用尿素或工业尿素的重量比为2-8∶1。
醇类溶剂为乙醇以外的醇类溶剂。
乙醇以外的醇类溶剂为甲醇、正丙醇;醚类溶剂为***。
干燥温度为10~150℃。
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,将水、醇类溶剂或醚类溶剂与农用尿素或工业尿素一起在10~100℃(例10℃、50℃、100℃)回流10~120分钟;然后冷却结晶,结晶温度为-20~50℃(例-20℃、0℃、30℃、50℃),并进一步过滤、干燥,干燥温度为10~150℃(例10℃、50℃、100℃、150℃)。
水、醇类溶剂或醚类溶剂与农用尿素或工业尿素的重量比为2-8∶1(例2∶1、5∶1、8∶1)。
醇类溶剂为乙醇以外的醇类溶剂,例甲醇、正丙醇及相关醇类溶剂;醚类溶剂为***及相关醚类溶剂。

Claims (2)

1.一种药用尿素的精制方法,其特征是:将水、醇类溶剂或醚类溶剂与农用尿素或工业尿素一起在10~100℃回流10~120分钟;然后冷却结晶,结晶温度为-20~50℃,并进一步过滤、干燥,干燥温度为10~150℃;水、醇类溶剂或醚类溶剂与农用尿素或工业尿素的重量比为2-8:1;醇类溶剂为乙醇以外的醇类溶剂。
2.根据权利要求1所述的药用尿素的精制方法,其特征是:乙醇以外的醇类溶剂为甲醇、正丙醇;醚类溶剂为***。
CN2010102580022A 2010-08-20 2010-08-20 药用尿素的精制方法 Expired - Fee Related CN101914041B (zh)

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CN101914041B true CN101914041B (zh) 2012-03-21

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102442928B (zh) * 2012-01-09 2013-10-16 四川泸天化股份有限公司 一种尿素提纯方法
CN102584635B (zh) * 2012-01-09 2013-10-02 四川泸天化股份有限公司 一种车用尿素的制备方法
CN107540576B (zh) * 2017-10-11 2023-07-18 四川大学 一种高纯度粒状晶体尿素制备方法及***

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101830833A (zh) * 2010-05-25 2010-09-15 符爱清 药用尿素的精制方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101830833A (zh) * 2010-05-25 2010-09-15 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》.2002,251-252. *
魏明等.尿素的结晶习性和晶体缺陷研究.《人工晶体学报》.1988,252. *

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Application publication date: 20101215

Assignee: Nantong Haiers Pharmaceutical Co., Ltd.

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Denomination of invention: Refining method for medicinal urea

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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 Nantong Hills Pharmaceutical Co., Ltd., No. 9, Chen Gao Industrial Park, Rudong County, Nantong, Jiangsu

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