The PT acid content in PTA was controlled from the aspects such as in-feeding, crystal temperature, slurry flow and residence time.
从进料、结晶温度、 浆料流速和停留时间等几个方面进行控制，降低了PTA中的PT酸含量。
The effect of temperature, average residence time and density of sulphate acid were discussed on nucleation rate, growth rate and crystal shape.
分别讨论了结晶温度、平均停留时间、硫酸质量分数等因素对结晶成核速率、晶体成长速率以及晶体形状、大小的影响。
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