Method and apparatus for removing hydrogen peroxide
A hydrogen peroxide, hydrogen oxide technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve problems such as catalyst performance degradation and prolong the effective period. Effect
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reference example 1
[0071] Prepared as an ultrapure water production device image 3 device shown. This ultrapure water production device 81 is constituted by three stages of a pretreatment device 82 , a primary pure water production device 83 , and a secondary pure water production device (subsystem) 84 . In the pretreatment device 82 of the ultrapure water production device 81 , filtration of the raw water W, coagulation sedimentation, and pretreatment with a microfiltration membrane are performed.
[0072] The primary pure water production device 83 has a tank 85 for pretreatment water W1, a reverse osmosis (RO) membrane device 86, an ultraviolet (UV) oxidation device 87, and a regenerative ion exchange device (mixed-bed type or 4-bed 5-tower type, etc.) 88 , Membrane degassing device 89.
[0073] The sub-system 84 is composed of a sub-tank 91 for storing the primary pure water W2 produced by the primary pure water production device 83, and an ultraviolet oxidizer for treating the primary pu...
reference example 2
[0081] In Reference Example 1, the used resin in the platinum group metal catalyst resin tower 93 after long-term operation was taken out and filled into a test column to prepare a test platinum group metal catalyst resin tower. In addition, for comparison, a new product resin was also filled in a test column to prepare a platinum group metal catalyst resin tower.
[0082] Add 300μg / L or 1000μg / L hydrogen peroxide to ultrapure water (hydrogen peroxide less than 1μg / L) to prepare the inlet water for the test, and measure the inlet water for the test at a water flow rate (SV) of 300hr -1 The concentration of hydrogen peroxide in the outlet water after passing down through each of the test columns mentioned above. The results are shown in Table 2.
[0083] [Table 2]
[0084]
[0085] As can be seen from Table 2, the outlet water hydrogen peroxide concentration of the used resin in the platinum group metal catalyst resin tower 93 after long-term operation was higher than that...
reference example 3
[0087] In Reference Example 1, the used resin in the platinum-group metal catalyst resin tower 93 after long-term operation was filled into a test column to prepare a test platinum-group metal catalyst resin tower. In addition, for comparison, a new product resin was also filled in a test column to prepare a platinum group metal catalyst resin column.
[0088] Add 30 μg / L hydrogen peroxide to ultrapure water (hydrogen peroxide less than 1 μg / L) to prepare inlet water, and measure the inlet water at a water flow rate (SV) of 400 hr -1 The concentration of hydrogen peroxide (No. 1) in the outlet water after passing down through each of the above test columns. The results are shown in Table 3.
[0089] In addition, as a load test, 400 μg / L hydrogen peroxide was added to ultrapure water (hydrogen peroxide less than 1 μg / L) to prepare inlet water for the test, and the inlet water for the test was fed at a water flow rate (SV) of 6400 hr. -1 After 22 hours of downward passage into...
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