A kind of method that utilizes sodium sulfate waste liquid in the production of viscose fiber to produce nanometer barium sulfate
A nano barium sulfate, sodium sulfate waste liquid technology, applied in nanotechnology, chemical instruments and methods, calcium/strontium/barium sulfate and other directions, can solve the problems of poor product quality, uneven mixing of raw materials, incomplete reaction, etc., To achieve the effect of reducing impurities, avoiding re-agglomeration, and completing the reaction
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Embodiment 1
[0054] A kind of method that utilizes sodium sulfate waste liquid in the production of viscose fiber to produce nano-barium sulfate, sodium sulfate waste liquid and barium chloride solution are pretreated to obtain pretreated sodium sulfate solution and pretreated barium chloride solution; pretreated sulfuric acid The sodium solution and the pretreated barium chloride solution are fed into the microchannel reactor for reaction; the microchannel reactor includes an upper feed layer 1, a lower feed layer 2 and a middle reaction layer 3; the upper feed layer 1 and the lower layer Feeding holes 4 are all arranged on the feeding layer 2; the middle layer reaction layer 3 is a network branch structure, and the barium chloride feeding channel 5 communicates with the sodium sulfate feeding channel 6 to form a feeding unit, and the two described The feeding unit is arranged oppositely, and communicates through the primary channel 7 at the same time, and the feeding unit and the primary ...
Embodiment 2
[0057] On the basis of embodiment 1:
[0058] Preferably, the pretreatment is specifically as follows: the sodium sulfate waste liquid and the barium chloride solution in viscose fiber production are respectively passed through flocculation and sedimentation, and the supernatants of the two raw materials are subjected to coarse filtration respectively, and finally membrane filtration is used to carry out Fine filtration, obtain pretreatment sodium sulfate solution and pretreatment barium chloride solution;
[0059] Further, the flocculation and sedimentation specifically include: pouring the sodium sulfate waste liquid and the barium chloride solution into the sedimentation tank through the pump respectively, according to 1m 3 Add 10g of flocculant polyvinylamide to sodium sulfate waste liquid or barium chloride solution, and settle for 12 hours.
[0060] Furthermore, the SS values of the supernatants of the two raw materials after flocculation and sedimentation are both 10...
Embodiment 3
[0065] On the basis of embodiment 1:
[0066] Preferably, the pretreatment is specifically as follows: the sodium sulfate waste liquid and the barium chloride solution in viscose fiber production are respectively passed through flocculation and sedimentation, and the supernatants of the two raw materials are subjected to coarse filtration respectively, and finally membrane filtration is used to carry out Fine filtration, obtain pretreatment sodium sulfate solution and pretreatment barium chloride solution;
[0067] Further, the flocculation and sedimentation specifically include: pouring the sodium sulfate waste liquid and the barium chloride solution into the sedimentation tank through the pump respectively, according to 1m 3 Add 20g of flocculant polyvinylamide to sodium sulfate waste liquid or barium chloride solution, and settle for 36 hours.
[0068] Furthermore, the SS values of the supernatants of the two raw materials after flocculation and sedimentation are both 50...
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