Cat urine pH indicating material, pH indicating silica gel cat sand and preparation method thereof
A silica gel and urine technology, which is applied in material analysis by observing the influence on chemical indicators, and analysis by chemical reaction of materials, can solve the problem of uneven distribution of pH indicator materials, affecting the color development and discoloration of cat litter. There are problems such as differences in effect and density, so as to achieve the effect of low production cost, improved test accuracy and uniform distribution.
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Embodiment 1
[0028]Put 5kg of bulk silica gel with a pore volume of 0.91ml / g, a bulk density of 386g / L, and a particle size of 0.7-1.5mm into the prepared pH indicator dipping solution. The pH indicator dipping solution consists of 5L with a concentration of 0.3 Wt% methyl red and bromothymol blue ethanol solution (the weight ratio of methyl red and bromothymol blue is 1 / 10), and 10L concentration is that the aqueous solution of 6wt% PEG-1500 mixes, soaks After 2 hours, dry the water at 75°C to below 4wt%, and the pH indicating material contains 0.1wt% of mixed indicators and 4wt% of PEG-1500. The obtained pH indicator material is mixed with the silica gel of the same specification, so that the weight percentage of the pH indicator material is 5wt%. The performance test data of silica gel cat litter is shown in Table 1:
[0029] Table 1
[0030]
Embodiment 2
[0032] Put 3kg of bulk silica gel with a pore volume of 1.21ml / g, a bulk density of 356g / L, and a particle size of 2-4mm into the prepared pH indicator dipping solution. The pH indicator dipping solution consists of 4L with a concentration of 0.9wt % methyl red and bromothymol blue ethanol solution (the weight ratio of methyl red and bromothymol blue is 1 / 6), mixed with 5L concentration of 9wt% PEG-200 aqueous solution, soaked for 2 After 1 hour, dry the moisture at 75°C to below 4wt%, and the pH indicator material contains 0.4wt% mixed indicator and 5wt% PEG-200. The obtained pH indicator material is mixed with the silica gel of the same specification again, so that the weight percentage of the pH indicator material is 3wt%. The performance test data of silica gel cat litter is shown in Table 2:
[0033] Table 2
[0034]
Embodiment 3
[0036] Put 1 kg of bulk silica gel with a pore volume of 0.97ml / g, a bulk density of 364g / L, and a particle size of 5-8mm into the prepared pH indicator dipping solution. The pH indicator dipping solution consists of 1.5L with a concentration of 0.6 wt% methyl red and bromothymol blue ethanol solution (the weight ratio of methyl red and bromothymol blue is 1 / 2), mixed with 3L concentration of 6wt% PVP-5000 aqueous solution, soaked After 2 hours, dry the water at 75°C to below 4wt%, and the pH indicating material contains 0.2wt% of mixed indicators and 4wt% of PVP-5000. The obtained pH indication material is mixed with the silica gel of the same specification, so that the weight percentage of the pH indication material is 8wt%. The performance test data of silica gel cat litter is shown in Table 3:
[0037] table 3
[0038]
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