丁辛醇缩合废水的处理工艺

doi:10.16085/j.issn.1000-6613.2020-0740

摘要/Abstract

摘要：

丁辛醇在缩合生产过程中会产生大量气味重、化学需氧量（COD）高、碱性强、盐度高且可生化性差的工业废水，其中COD浓度高达80g/L。本文提出了一种处理丁辛醇缩合废水的新工艺，即“酸化-隔油”预处理-非均相臭氧催化氧化处理-碟管式反渗透（DTRO）膜组处理深度处理。本文在非均相臭氧催化氧化处理过程中重点研究了催化剂种类、pH和反应时间对处理效果的影响规律；在DTRO处理过程中探究了操作压力对产水水质的COD和TDS的影响。实验结果表明：丁辛醇缩合废水在pH≤3的条件下进行“酸化-隔油”预处理，之后将“酸化-隔油”后的废水pH调节至7，再进行非均相臭氧催化氧化120min，其中每100g废水中需添加4号商业催化剂20g，最后DTRO膜组在7MPa的操作压力下对氧化后的废水进行深度处理。经检验，膜组出水的COD去除率达到99.6%以上。

关键词: 丁辛醇缩合废水, 酸化, 非均相臭氧催化氧化, 碟管式反渗适膜组, COD去除率

Abstract:

A great deal of sewage with heavy odor, high COD, strong alkalinity, high salinity and poor biodegradability will be produced during the condensation production of butyl alcohol and 2-ethyl hexanol, in which the COD concentration is up to 80g/L. A new process for treating butyl alcohol and 2-ethyl hexanol condensation sewage was presented in this paper, that is, “acidification-oil trap”pretreatment-heterogeneous ozone-catalyzed oxidation treatment-disc-tube reverse osmosis (DTRO) membrane treatment further treatment. The effects of catalyst type, pH and reaction time on the treatment were investigated. Then the influence of operating pressure on COD and TDS of treated water quality was investigated in the process DTRO membrane process. It showed that the butyl alcohol and 2-ethyl hexanol condensation sewage pretreated with acidification and oil isolation at pH≤3, then the sewage was adjusted to pH 7. After that, it carried out by heterogeneous ozone-catalyzed oxidation for 120min, finally the operating pressure of DTRO membrane treated the oxidized sewage under of 7MPa. According to the test, the COD removal rate of butyl alcohol and 2-ethyl hexanol condensation sewage could reach 99.6%.

Key words: butyl alcohol and 2-ethyl hexanol condensation sewage, acidification, heterogeneous ozone-catalyzed oxidation, DTRO membrane group, COD removal rate

中图分类号:

X703

项军, 张平, 李治水, 聂增来, 唐娜. 丁辛醇缩合废水的处理工艺[J]. 化工进展, 2021, 40(2): 1097-1105.

Jun XIANG, Ping ZHANG, Zhishui LI, Zenglai NIE, Na TANG. Treatment technology of butyl alcohol and 2-ethyl hexanol condensation sewage[J]. Chemical Industry and Engineering Progress, 2021, 40(2): 1097-1105.

图/表 15

参考文献 19

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有机物类别	出峰时间/min	分子式	CAS号	物质名称
醛类	6.193	C₈H₁₄O	645-62-5	2-乙基-2-己烯醛
羧酸	12.461	C₁₈H₃₄O₂	693-71-0	反式-13-十八碳烯酸
醇类	17.552	C₁₃H₂₈O	85763-57-1	11-甲基-1-十二烷醇
苯环	13.937	C₁₃H₁₃NO	101-16-6	3-甲氧基二苯胺
	14.347	C₂₆H₂₂O₄	7727-33-5	1,1,2,2-四(4-羟基苯基)乙烷
	14.656	C₁₃H₁₃NO	41295-20-9	对氨基苯甲醚
脂类	10.758	C₈H₁₂O₅	100009-70-9	3-甲基戊-2-烯二酸二甲酯
脂类	14.818	C₁₀H₁₃NO₄	7101-51-1	盐酸左旋多巴甲酯

有机物类别	出峰时间/min	分子式	CAS号	物质名称
醛类	6.193	C₈H₁₄O	645-62-5	2-乙基-2-己烯醛
羧酸	12.461	C₁₈H₃₄O₂	693-71-0	反式-13-十八碳烯酸
醇类	17.552	C₁₃H₂₈O	85763-57-1	11-甲基-1-十二烷醇
苯环	13.937	C₁₃H₁₃NO	101-16-6	3-甲氧基二苯胺
	14.347	C₂₆H₂₂O₄	7727-33-5	1,1,2,2-四(4-羟基苯基)乙烷
	14.656	C₁₃H₁₃NO	41295-20-9	对氨基苯甲醚
脂类	10.758	C₈H₁₂O₅	100009-70-9	3-甲基戊-2-烯二酸二甲酯
脂类	14.818	C₁₀H₁₃NO₄	7101-51-1	盐酸左旋多巴甲酯

出峰时间/min	分子式	CAS号	物质名称
4.093	C₁₆H₃₀O₄	74381-40-1	2,4,4-三甲基戊烷-1,3-二基双(2-甲基丙酸酯)
11.542	C₁₁H₁₁N	1198-37-4	2,4-二甲基喹啉
14.445	C₁₂H₁₃N₃	136-17-4	2,4-二氨基二苯胺
15.073	C₁₃H₂₂N₆O	21868-45-1	4-(吗啉-4-甲基)-6-哌啶-1-甲基-1,3,5-三嗪-2-氨基
17.458	C₂₆H₂₂O₄	93045-47-7	3-叔丁基-1H-吡唑-5-羧酸
18.533	C₂₂H₃₆O₂	7511-47-9	2,5-双(1,1,3,3-四甲基丁基)-2,5-环己二烯-1,4-二酮
20.063	C₁₀H₁₂O₄	1421-63-2	2',4',5'-三羟基苯丁酮
20.181	C₁₅H₁₆	620-85-9	1-苯甲基-4-乙苯

出峰时间/min	分子式	CAS号	物质名称
4.093	C₁₆H₃₀O₄	74381-40-1	2,4,4-三甲基戊烷-1,3-二基双(2-甲基丙酸酯)
11.542	C₁₁H₁₁N	1198-37-4	2,4-二甲基喹啉
14.445	C₁₂H₁₃N₃	136-17-4	2,4-二氨基二苯胺
15.073	C₁₃H₂₂N₆O	21868-45-1	4-(吗啉-4-甲基)-6-哌啶-1-甲基-1,3,5-三嗪-2-氨基
17.458	C₂₆H₂₂O₄	93045-47-7	3-叔丁基-1H-吡唑-5-羧酸
18.533	C₂₂H₃₆O₂	7511-47-9	2,5-双(1,1,3,3-四甲基丁基)-2,5-环己二烯-1,4-二酮
20.063	C₁₀H₁₂O₄	1421-63-2	2',4',5'-三羟基苯丁酮
20.181	C₁₅H₁₆	620-85-9	1-苯甲基-4-乙苯

出峰时间/min	分子式	CAS号	物质名称
5.756	C₈H₁₆O	1004-29-1	2-丁基四氢呋喃
6.292	C₈H₁₄O	645-62-5	2-乙基-2-己烯醛
10.155	C₁₃H₁₆N₂	19686-05-6	2,8-二甲基-2,3,4,5-四氢-1H-吡啶1并1[4,3-b]吲哚
12.047	C₂₂H₁₄O₃	87688-44-6	2-(9-蒽基)茚满-1,3-二酮
15.895	C₁₄H₁₁N	611-64-3	9-甲基吖啶
18.265	C₁₆H₁₈O	577-92-4	4-叔-丁基-2-苯基苯酚