Invention Grant
- Patent Title: Method for producing acrylic acid
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Application No.: US15548538Application Date: 2016-01-26
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Publication No.: US10239815B2Publication Date: 2019-03-26
- Inventor: Toyofumi Sakai , Masashi Mukae , Yasutaka Takemoto
- Applicant: NIPPON SHOKUBAI CO., LTD.
- Applicant Address: JP Osaka
- Assignee: NIPPON SHOKUBAI CO., LTD.
- Current Assignee: NIPPON SHOKUBAI CO., LTD.
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2015-021295 20150205
- International Application: PCT/JP2016/052148 WO 20160126
- International Announcement: WO2016/125631 WO 20160811
- Main IPC: B01D3/26
- IPC: B01D3/26 ; B01D3/32 ; B01D3/40 ; C07C31/20 ; C07C51/44 ; C07C57/04 ; C07D307/60

Abstract:
The objective of the present invention is to provide a method for efficiently producing acrylic acid while troubles not only in a waste oil handling after distillation of acrylic acid but also in a purification system of acrylic acid during distillation are reduced. The method for producing acrylic acid according to the present invention is characterized in comprising the step of supplying at least crude acrylic acid and an alcohol solvent to an acrylic acid distillation apparatus to distill acrylic acid, wherein a boiling point of the alcohol solvent is higher than a boiling point of acrylic acid by not lower than 50° C.
Public/Granted literature
- US20180022680A1 METHOD FOR PRODUCING ACRYLIC ACID Public/Granted day:2018-01-25
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