The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 2022
Filed:
Feb. 21, 2018
Mitsubishi Gas Chemical Company, Inc., Chiyoda-ku, JP;
Kohei Shigeta, Katsushika-ku, JP;
Yasuhiro Kushida, Kamisu, JP;
Tetsuya Yamamoto, Kamisu, JP;
Shinichiro Matsuura, Kamisu, JP;
Hidetoshi Ikeda, Katsushika-ku, JP;
MITSUBISHI GAS CHEMICAL COMPANY, INC., Chiyoda-ku, JP;
Abstract
Provided are a method and system for efficiently producing a purified aqueous hydrogen peroxide solution having a high purity. This method for producing a purified aqueous hydrogen peroxide solution comprises: step A for vaporizing a raw material containing a crude aqueous hydrogen peroxide solution; step B for condensing at least a portion of the gas and liquid obtained in step A, and separating the gas and liquid into a gas phase and a liquid phase; and step C for returning, into the raw material, at least a portion of a separation liquid which is the separated liquid phase, wherein step C further includes step D for adjusting the concentration of hydrogen peroxide in the separation liquid.