以粉煤灰为原料制备的硫酸铝中含有大量的铁，产品质量达不到标准。
The was used as aluminum sulfate prepared from fly ash contains lots of iron. The product was disqualification.
理想的牙龈收缩试剂包括氢氧化铝氯化物，硫酸铝或硫酸铁溶液。
Suitable retraction agents include aluminium hydroxide chloride, aluminium sulfate or ferric sulfate solutions.
介绍了用伯胺直接从铝土矿的硫酸浸取液中萃取分离铁生产无铁硫酸铝的工艺研究内容和结果，并介绍了工艺技术经济状况。
The technology and test results for the preparation of non-iron aluminium sulfate by primary amine extraction method are introduced. The technical and economical status of the process are also stated.
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