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Method for harmlessly treating BDO organic waste liquid

A technology of harmless treatment and organic waste liquid, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of high production cost, low production efficiency, complicated procedures, etc. Efficiency improvement, simple effect of desalination method

Active Publication Date: 2017-01-25
迪邦(泸州)化工有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0007] However, in actual production, according to "A method for harmless treatment of BDO organic waste liquid" (patent number: ZL201410462861.1), the harmless treatment needs to be processed according to the methods of patents ZL201010568080.2 and ZL201010568079.X , and the salt-containing substances need to be burned in the later stage, the whole process is still complicated, the production cost is high, the energy consumption is high, and the production efficiency is low

Method used

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  • Method for harmlessly treating BDO organic waste liquid
  • Method for harmlessly treating BDO organic waste liquid
  • Method for harmlessly treating BDO organic waste liquid

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Embodiment 1

[0038] In this embodiment, the BDO waste alcohol solution with a concentration of 20-30% and nitric acid with a concentration of 40% are used to adjust the pH value to 3-4. The reaction conditions are: liquid temperature 100°C-130°C, reaction pressure normal pressure, and the reaction result See Table 1:

[0039] Table 1

[0040]

[0041]

Embodiment 2

[0043] In this embodiment, the concentration of 30-40% BDO waste alcohol and 60% concentration of nitric acid are used to adjust the pH value to 4-5. The reaction conditions are: liquid temperature 130°C-150°C, reaction pressure normal pressure, and the reaction results are shown in Table 2.

[0044] Table 2

[0045]

Embodiment 3

[0047] In this embodiment, the concentration of 40-50% BDO waste alcohol and 50% concentration of nitric acid are used to adjust the pH value to 5-6. The reaction conditions are: liquid temperature 140°C-160°C, reaction pressure normal pressure, and the reaction results are shown in table 3.

[0048] table 3

[0049]

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Abstract

The invention discloses a method for harmlessly treating BDO organic waste liquid. The method includes the steps of firstly, adding the BDO organic waste liquid into a reaction kettle, adding acid to regulate pH, and performing distillation separation to collect light end and moisture; secondly, performing salt and alcohol solution separation on reaction substrate; thirdly, washing and refining the separated salt with organic solvent; fourthly, performing further distillation extraction on the alcohol solution after salt separation. The method has the advantages that the BDO organic waste liquid is treated to obtain BDO and sodium salt, 100% harmless and zero waste emission treatment of the BDO organic waste liquid is achieved, production efficiency is increased by more than 5 times, one-step desalting rate reaches more than 99%, and the method which does not use catalysts is simple and practical, easy to operate, easy to achieve large-scale production and low in cost.

Description

technical field [0001] The invention relates to a method for treating waste liquid, in particular to a method for harmlessly treating BDO organic waste liquid. Background technique [0002] 1,4-Butanediol, also known as BDO, is a widely used fine chemical raw material. Since it was introduced from the United States to China in the early 21st century, its annual output has rapidly increased from tens of thousands of tons to millions of tons. The production methods of BDO include maleic anhydride method, alkyne aldehyde method, allyl alcohol method, etc., but the most commonly used method is alkyne aldehyde method. The process of producing 1,4-butanediol by alkyne aldehyde method is to use acetylene and formaldehyde to generate 1,4-butynediol, and 1,4-butynediol is hydrogenated and saturated under high pressure to generate 1,4-butanediol alcohol. In this process, because the raw materials need to be purified with concentrated sulfuric acid and the buffer solution composed of...

Claims

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Application Information

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IPC IPC(8): C07C31/20C01D9/04C07C29/74C07C29/88
CPCC01D9/04C07C29/74C07C29/88C07C31/207
Inventor 杨国权杨泽江夏锡兰肖勇严泽清
Owner 迪邦(泸州)化工有限公司
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