从聚醚多元醇工业滤渣中回收聚醚多元醇和磷酸二氢钾.pdf

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ENVIRONMENTAL PROTECTION OF CHEMICAL INDUSTRY
2011年第31卷第5期
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缐合利用
从聚醚多元醇工业滤渣中回收
聚醚多元醇和磷酸二氢钾
厂炳海
(中国石化天津石化分公司聚醚部,天津300163)
摘要]采用萃取、分离工艺从生产聚醚多元醇(PPG)的滤渣中回收PPG和KH2PO4。实验结果表明:用于生产聚
氨酯(PU)泡洣包装块和高回弹泡洣制品的PPG的滤渣适宜采用该工艺回收;本实验最佳工艺条件为KH2PO4结
晶母液与滤渣质量比为2.0,萃取温度80-90℃,萃取时间60~90min,静置温度80~90℃,静置时间不少
24h,结晶搅拌转速400r/min,KH2PO浓缩液pH4.6~4.7,结晶冷却速率不超过0.7℃/min,结晶温度-2
0℃,结晶时间1.5-2.0h。在优选J工艺条件下,滤渣的PPG平均收率为88.2%,质量指标达到QSH060012
2010《聚醚多元醇》中国石化天津石化分公司企业标准;KH2PO4平均收率为81.8%,质量指标达到HG2321-92
《磷酸二氢钾》工业品一级标准
[关键词]聚瞇多元醇;磷酸二氢钾;滤渣;萃取;结晶;综合利用
[中图分类号]TQ326.
文献标识码1A
文章编号11006-1878(2011)05-0450-05
Recovery of Polyether Polyol and Potassium Dihydrogen Phosphate from
Filter Residue in Polyether Polyol Production
Ding Binghai
( Polyether Department, Tianjin Petroleum Chemical Corporation, STNOPEC, Tianjin 30)163, China)
Abstract Polyether polyol(PPG )and KH, PO, were recovered from the filter residue in PPG production
by extraction and crystallization process. PPG is the raw material for the production of polyurethane
(PU) foam block and high resilient foam. The experimental results show that this recovery process is
suitable for the filter residue in PPG roduction. The optimum process conditions are as follows: mas
ratio of KH, PO, crystallization mother liquor to filter residue 2.0, extraction temperature 80-90 C
extraction time 60-90 min, standing temperature 80-90 C, standing time not less than 24 h, stiring
speed for crystallization 400 I/min, concentrated KH, PO solution PH 4. 6-4. 7, cooling rate not more
than 0. 7 C/min, crystallization temperature2-0 C, crystallization time 1. 5-2.0 h. Under these
conditions, the average yield of PPG is 88. 2%, and the product quality meets the enterprise standard Q
SH1060 012-2010 of Tianjin petroleum chemical corporation, STNOPEC; the average yield of KH PO, is
81.8%, and the product quality meets the first grade industrial product standard of HG2321-92
Key words polyether polyol; potassium dihydrogen phosphate; filter residue; extraction crystallization
comprehensive utillization
聚醚多元醇(PPG)是粲氨酯(PU)工业的重要天津石化公司聚醚部每年生产PPG约90kt,产生滤
原料之一,约占PU制品全部用料的60%(质量分
数)以上“2。PU制品因具有优异的物理机械性。『收稿日期」2011-07-08.修订日期】201-07-25
能及加工性能被广泛用于汽车、飞机、轮船、家具、作者简介」丁炳海(1957-),男,天津市人,大学,高级工
家电、建筑材料等领域中。PPG工业产生的滤渣程师,主要从事聚多元醇和聚合物多元醇的研究开发工
(以下简称滤渣)由PPG、KH2PO2和硅酸镁等组成。作。电话13821767416,电邮dingbinghai(@26.com