通过对原有生产工艺进行改进，加入除铁专用的助溶剂，变原有多段除铁为一段除铁，使生产过程周期由原工艺的24 h缩短为15 h，生产效率提高50%，酸性废水减少60%。加入除铁专用的助溶剂，使铁的去除率由原工艺的78.0%提高到93.3%。通过生产连续运行考察，在最佳操作条件下，产品中铁质量分数降低到0.08%，收率由原工艺的88%提高到93%，经济效益显著。

The original production process is improved with the addition of specific co-solvent for removing iron and one stage removal of iron replacing multi stage removal of iron for a period in addition to iron.After improvement,the production cycle is shortened to 15 hours from the original 24 hours,the production efficiency increases by 50%,and emission amount of acidic wastewater reduces by 60%.With the addition of specific co-solvent,the removal rate of iron increases from 78.0% to 93.3%.Through continuous operation,the iron content in the product drops to 0.08% under the optimum operating conditions,and the yield increases from 88% in original process to 93%.The economic benefit is remarkable.