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This thesis 4 - (meth) acrylamide - salicylic acid ( 4 - MASA) , acrylamide (AM) , and acrylic acid (AA ) as monomers , using the method of inverse emulsion , synthetic P ( AM/4-MASA , ) and two binary polymer P (AA/4-MASA) , the focus of single factor experiments investigated the synthesis conditions of relative molecular mass P (AM/4-MASA) , and using the same process synthesis the P ( AA/4-MASA ) . Polymer structure and properties were characterized by IR spectroscopy and particle size analysis . Luoyang Xiangjiang Wanji Aluminum Co. of red mud slurry for the study, a systematic study of the P (AM/4-MASA) red mud settling performance . Flocculant P ( AM/4-MASA ) , P ( AA/4-MASA ) and PAA flocculation performance comparison, and combine that P ( AM/4-MASA ) and the sedimentation experiment after PAA compound data , analyze the different functional groups and molecular weight on the flocculation performance . Single factor experiments ,4-MASA and AM ( or AA) ratio of 1:27 , the initiator is ammonium persulfate , used in an amount of 0.8% , using the compound emulsifier (Span-80 and the Tween -80 ) , used in an amount 8%, HLB value of 6.5 , oil-water ratio of 1.3:1 , triggering a temperature of 60 ° C , to obtain the molecular weight of the polymer was 1.3 million . Sedimentation experiment , the selected dosage 50g / t dry sludge , with the monomer acrylamide and 4 - METHACRYLOYLMINO salicylate ratio increases , the decrease in the content of salicylic acid in the polymer , the increase of the molecular weight , settling velocity gradually speed up . When a monomer, 4 - (meth) acrylamide - based sodium salicylate and acrylamide ratio of 1:23 , a molecular weight of 115 000 , the absorbance was 0.103 , and the supernatant clarity improvement effect is obvious with the world recognized efficient flocculation agent results have been very , salicylic acid functional groups can significantly improve the clarity of red mud slurry . Red mud settling contrast carboxyl-containing PAA and the P ( AA/4-MASA ) , PAA settlement faster than P ( AA/4-MASA ) , visible flocculant molecular weight is decided settling velocity of the main factors . P (AM/4-MASA) and PAA 2:1 complex with the use of layered 79 seconds , 10min before settling velocity of 10.4 mm / min , the absorbance was 0.105 , settling velocity close of PAA , and the supernatant clarify the effect close to P (AM/4-MASA).
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