Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Industries LtdfiledCriticalSumitomo Metal Industries Ltd
Priority to JP16279978ApriorityCriticalpatent/JPS5588851A/en
Publication of JPS5588851ApublicationCriticalpatent/JPS5588851A/en
PURPOSE:To provide the title catalyst of a low reaction temp. simply produced from an aq. soln. contg. a restricted amt. of iron ions besides various metal ions. CONSTITUTION:An aq. soln. contg. various metal ions such as Fe, Zn, Ni, Cr, Al, Mn, Cu, Mg, Na and K ions is adjusted so that the total amt. of iron ions contained becomes more than 4 times as much as the total amt. of metal ions other than Fe ion, and the amt. if ferric ion becomes 1-3 times as much as the amt. of ferrous ion. Alkali is added to this adjusted soln. to regulate the pH value to about 12, thus forming precipitates, which are then dried to give an NH3 reduction system dry catalyst for removing NOX.