acoh

Discussion on reducing AcOH consumption in PTA production

PTA生产中降低醋酸消耗的探讨

Reactions are generally faster in DCE than in THF , and in both solvents , reactions are faster in the presence of AcOH .

以DCE为溶剂，反应速度比在以THF为溶剂快，如果有醋酸作为催化剂，反应速度会提高许多。

The AcOH consumption was reduced to 54kg / t by the means of lower temperature operation , azeotropic rectifying , by product recovery and utilization .

扬子石化采用降温操作、共沸精馏和副产物回收利用，使醋酸消耗降至54kg/t。

The supply and demand present situation of world polyester raw material such as PTA , EG , PX and AcOH was reviewed . The development tendency was expected .

叙述了世界聚酯原料PTA、EG、PX、AcOH的供求现状，并对发展态势进行了展望。

It is estimated that the polyester raw material ( PTA , EG , PX , AcOH ) will still in great demand in the next few years .

预计今后几年内，世界聚酯原料PTA，EG，PX和AcOH的供求仍将继续处于紧俏状态。

The AcOH consumption of PTA Plant in Yangzi Petrochemical Co. experienced the course from 100 kg / t , 68 kg / t to 54 kg / t.

扬子石化PTA装置的醋酸消耗经历了从100kg/t68kg/t54kg/t的历程。

But this index still had difference with the advanced level . The Yangzi company is working hard to adjust the process , and to modify the equipments to lower the AcOH consumption to 44 kg / t.

但此指标距先进水平仍有差距，正努力调优工艺，改造设备，力争把醋酸消耗降至44kg/t。

N-acylchitosan prepared by reaction between carboxylic anhydride and chitosan in CH3OH and acetic acid ( AcOH ), as the medium of reaction , and films of N-acylchitosan prepared from their solution .

以甲醇和醋酸为介质，通过酸酐与壳聚糖反应合成出N-酰基壳聚糖，并以溶液法制备出N-酰基壳聚糖膜。

By stabilizing the in-feeding quantity , washing the in-feeding line in time , avoiding the in-feeding high concentration , keeping the beating tank discharging pump entrance and out line unblocked , the operation smooth rate is increased , the AcOH content in beating tank is sharply reduced .

通过稳定进料量，及时冲洗进料线，避免进料浓度过高，保持打浆罐出料泵出入管线畅通等，操作平稳率增加，打浆罐中醋酸含量大大降低。