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PROCESS FOR PRODUCING ACRYLIC ACID, AND PROCESS FOR PRODUCING HYDROPHILIC RESIN AND PROCESS FOR PRODUCING WATER ABSORPTIVE RESIN USING THE PROCESS
专利权人:
Nippon Shokubai Co., Ltd.
发明人:
SAKAMOTO, Kazuhiko,ISHIKAWA, Masaru
申请号:
EP20090738750
公开号:
EP2275400(B1)
申请日:
2009.04.24
申请国别(地区):
欧洲专利局
年份:
2017
代理人:
摘要:
[Problem] There is provided, in a process for producing acrylic acid having a catalytic gas-phase oxidation reaction step, a condensation step, a collection step, a distillation step, a crystallization step, an acrylic acid recovering step or the like, a production method for acrylic acid, in which contamination of acrylic acid with protoanemonin without providing any additional purification treatment to the resultant purified acrylic acid can be reduced. [Solution] The problems described above can be solved by providing the production method for acrylic acid comprising A) a step obtaining an acrylic acid-containing gas by a catalytic gas-phase oxidation reaction of gas containing a acrylic acid raw material; B) a step of obtaining the acrylic acid-containing solution by introducing the acrylic acid-containing gas to the collection column or the condensation column and performing collection or condensation; C) a step of obtaining the crude acrylic acid by introducing the acrylic acid-containing solution to
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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