精对苯二甲酸(PTA)生产技术及工艺流程

精对苯二甲酸(PTA)生产技术及工艺流程

摘要

精对苯二甲酸（PTA）英文名称：Pure terephthalic acid（PTA)分子式C6H4（COOH）2 。是以对二甲苯为原料，液相氧化生成粗对苯二甲酸，再经加氢精制，结晶，分离，干燥，得到精对苯二甲酸。精对苯二甲酸为白色针状结晶或粉末，约在 300℃升华，自燃点680℃。能溶于热乙醇，微溶于水，不溶于乙醚、冰醋酸和氯仿。低毒，易燃。其粉尘与空气形成爆炸性混合物，爆炸极限0.05g/L～12.5g/ L。

精对苯二甲酸是生产聚酯切片、长短涤纶纤维等化纤产品和其它重要化工产品的原料。精对苯二甲酸（PTA）是重要的大宗有机原料之一，其主要用途是生产聚酯纤维(涤纶)、聚酯薄膜和聚酯瓶，广泛用于与化学纤维、轻工、电子、建筑等国民经济的各个方面，与人民生活水平的高低密切相关。

关键词：氧化反应结晶高压吸收常压吸收分离干燥溶剂及催化剂回收残渣蒸发溶剂脱水萃取常压汽提系统加氢反应过滤

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目录

摘要 ··········································································································I 前言 ······································································································- 1 -第一章精对苯二甲酸的工业概貌 ································································- 2 -

1.1 世界精对苯二甲酸工业概貌 ··························································- 2 -

1.2 我国精对苯二甲酸工业概貌 ··························································- 3 -第二章精对苯二甲酸的上下游产业链······················································- 5 -

2.1 精对苯二甲酸的上游产业······························································- 5 -

2.2 精对苯二甲酸的下游产业······························································- 5 -第三章精对苯二甲酸的性质及其主要用途 ···············································- 6 -

3.1 精对苯二甲酸的性质 ····································································- 6 -

3.1 精对苯二甲酸的主要用途······························································- 6 -第四章精对苯二甲酸的主要原料·····························································- 7 -第五章产品方案及规格···········································································- 8 -

5.1 产品方案······················································································- 8 -

5.2 主要产品规格···············································································- 8 -第六章精对苯二甲酸的生产工艺技术······················································- 9 -

6.1 国外工艺技术现状 ········································································- 9 -

6.2 国内的工艺技术选择 ··································································- 10 -第七章精对苯二甲酸的工艺流程及操作条件 ·········································- 11 -

7.1 反应历程简介·············································································- 11 -

7.1.1 对二甲苯氧化 ···································································- 11 -

7.1.2对苯二甲酸精制·································································- 12 -

7.2 工艺流程简述·············································································- 12 -

7.2.1 空气压缩机·······································································- 12 -

7.2.2 100 单元---母液储存罐····················································- 12 -

7.2.3 200 单元--氧化反应、结晶、高压吸收及常压吸收。 ·········- 13 -

7.2.4 300 单元－－分离、干燥 ··················································- 14 -

7.2.5 400 单元－－溶剂及催化剂回收、残渣蒸发、溶剂脱水、萃取、

常压汽提系统。 ···········································································- 14 -

7.2.6 500 单元—进料配制、反应进料预热、加氢反应、结晶 ·····- 16 -

7.2.7 600 单元—过滤、干燥······················································- 19 -

7.2.8 PTA 产品之储存装袋及出料···············································- 20 -第八章精对苯二甲酸生产的关键设备及其特点 ······································- 22 -

8.1 精对苯二甲酸氧化单元的关键设备——氧化反应器······················- 22 -

8.2 精对苯二甲酸精制单元的关键设备··············································- 22 -

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