Method for preparing multiple metallic ion leather tanning agents
A metal ion and tanning agent technology, which is applied in the field of leather tanning agent preparation, can solve the problems of difficult industrialization promotion, water washing resistance, poor aging resistance, and leather not washing resistance.
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Embodiment 1
[0011] Add 100 parts of sodium chromium into the reaction kettle, add 150 parts of water and 95 parts of sulfuric acid to dissolve the sodium chromium to make a dichromic acid solution; add crushed solid waste containing chromium and collagen to the dichromic acid solution, the amount is equivalent to The organic matter is 45 parts, heated to 90° C. in a water bath, and stirred for 120 minutes. Then weigh 25 parts of sulfuric acid, dilute with 100 parts of water, and use it to dissolve 125 parts of ferrous sulfate, then drop it into the reaction system at 90°C, stir for 10 minutes, take a sample to detect that there is no Cr(VI), then add 10 parts Sodium tartrate and 13 parts of solid sodium citrate were stirred at 90° C. for 20 minutes, and then left to age to obtain a liquid leather tanning agent containing various metal ions.
Embodiment 2
[0013] Add 100 parts of sodium rufium into the reaction kettle, add 160 parts of water and 96 parts of sulfuric acid, stir to dissolve the sodium ruthin, and make a dichromic acid solution. Add the pulverized solid waste containing chromium and collagen into the dichromic acid solution, the amount of which is converted into 46 parts of organic matter, and keep warm at 92° C. and stir for 130 minutes. Then weigh 24 parts of sulfuric acid, dilute with 100 parts of water, and use it to dissolve 120 parts of ferrous sulfate, then drop it into the reaction system at 92°C, stir for 15 minutes, take a sample to detect that there is no Cr(VI), and then add 11 parts Sodium tartrate and 14 parts of solid sodium citrate were stirred at 92° C. for 30 minutes, and then left to age to obtain a liquid leather tanning agent containing various metal ions.
Embodiment 3
[0015] Add 100 parts of sodium red vanadium to the reaction kettle, add 170 parts of water and 97 parts of sulfuric acid, stir to dissolve the sodium red vanadium, and make a dichromic acid solution. Add crushed solid waste containing chromium and collagen into the dichromic acid solution, the amount of which is equivalent to 47 parts of organic matter, and keep warm at 94° C. and stir for 140 minutes. Then weigh 23 parts of sulfuric acid, dilute with 100 parts of water, and use it to dissolve 115 parts of ferrous sulfate, then drop it into the reaction system at 94°C, stir for 15 minutes, and after sampling to detect that there is no Cr(VI), add 12- 1 part of sodium tartrate and 15 parts of solid sodium citrate, stirred at 94°C for 40 minutes, and left to age to obtain a liquid leather tanning agent containing various metal ions.
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