Study on the synthesis and scale inhibition performance of phosphate free environmental protection type poly epoxy succinic acid

Changshan Huang, Huiwu Xu, Min Chen, Min Zhang, Jinying Wu
2015 Proceedings of the 2015 International Forum on Energy, Environment Science and Materials   unpublished
Using maleic anhydride as raw material, sodium tungstate as catalyst, hydrogen peroxide as oxidizing agent, calcium hydroxide as initiator, the synthesis conditions of the best scale inhibition performance of poly epoxy succinic acid were studied by using the method of polymerization: maleic anhydride dosage was 9.8g, the catalyst sodium tungstate amount used is 0.33g, the cyclization response pH value is 4, the initiator calcium hydroxide joins the quantity is 0.5g , polymerization temperature
more » ... ization temperature 82˚C, polymerization time 2h. The scale inhibition performance of the poly epoxy succinic acid was evaluated by atomic absorption spectrophotometry: When gathers the poly epoxy succinic acid joins the quantity is 8mg/L, the best effect of the scale inhibition rate of barium sulfate is 98%; When gathers the poly epoxy succinic acid joins the quantity is 40mg/L, the best effect of the scale inhibition rate of strontium sulfate is 90.4%. Experiments Reagents. Maleic anhydride, 30% hydrogen peroxide, sodium hydroxide, calcium hydroxide, sodium tungstate, sodium chloride, sodium sulfate, barium chloride, strontium chloride, anhydrous ethanol, hydrochloric acid, all the reagents were analytical pure grade reagent. Instruments. 501BS type super constant temperature water bath; JB90-D type strong electric mixer; 402 type vacuum drying box; WH-1 type SR hollow cathode lamp; WH-1 type barium hollow cathode lamp; LAB-200 type fully automatic atomic absorption spectrophotometer. Experimental methods. 9.8g of maleic anhydride and 18ml deionized water were added to the beaker, stirring to dissolve, pour in three mouth flask. Through the constant pressure drop funnel drop add a certain amount of 50% sodium hydroxide solution, when the bath temperature rose to 60˚C, adds the catalyst sodium tungstate and within 30min uniform droplets with a certain amount of mass fraction as 30% hydrogen peroxide oxidation agent, keep the temperature of water bath at 60˚C, polymerization reaction 2h after, with 50% sodium hydroxide solution adjusting the pH value in 4, International Forum on Energy, Environment Science and Materials (IFEESM 2015)
doi:10.2991/ifeesm-15.2015.9 fatcat:55vlidafercphe6kfw76gej3em