Method for treating wastewater containing cycloheximide and hexamethylene diamine

A technology of cyclohexylimine and hexamethylenediamine, which is applied in the field of industrial wastewater treatment, can solve the problems of long treatment period in the site, high energy consumption of distillation heating, high operating pressure, etc., and achieve high adsorption sensitivity, fast adsorption speed, and removal high rate effect

Active Publication Date: 2011-08-17
HENAN ACADEMY OF SCI CHEM RES INST CO LTD
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Problems solved by technology

[0004] The methods reported in the above literatures have their own advantages, but there are also some shortcomings or aspects that need to be developed. For example, the extraction efficiency of the solvent extraction method is not high, and there are still more cycloheximide residues in the wastewater after multi-stage extraction. amine; the reverse osmosis method requires a large operating pressure, and the concentration ratio of the wastewater is not high enough; the distillation method consumes more heating energy and is not suitable for treating low-concentration wastewater; the biological treatment method usually requires a larger site and a longer period of time. Treatment cycle; the adsorption method has not yet involved the treatment of cycloheximide and hexamethylenediamine wastewater, and the adsorbent used is a traditional resin-form adsorbent, and has not yet involved fiber-form adsorbents

Method used

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  • Method for treating wastewater containing cycloheximide and hexamethylene diamine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Measure 100mL of waste water (the mass percent concentration of cycloheximide and hexamethylenediamine is 0.3% and 0.1% respectively) and add it into a 250mL ground-mouth Erlenmeyer flask, and put in 0.5g of the above-mentioned fiber adsorbent (the carboxyl content of the fiber is 6.5mmol / g), airtightly mixed and oscillated at room temperature, water samples were taken at different times to measure the total nitrogen in water with a total nitrogen / total organic carbon analyzer ( TN ). Raw wastewater TN 701ppm, after shaking for 2min TN That is, it drops to 214ppm, after 5min TN Drop to 186ppm, continue to shake for 3 hours TN No significant changes. It shows that in the case of excessive amines, the fiber is nearly saturated after 5 minutes of adsorption. Fiber pair at 5min TN The adsorption amount is 7.4mmol / g, which is higher than the theoretical adsorption amount of 6.5mmol / g (carboxyl and amino groups are adsorbed at a ratio of 1:1). This is because the adsor...

Embodiment 2

[0015] Measure 10mL of waste water (the mass percent concentration of cycloheximide and hexamethylenediamine is 0.3% and 0.1%, respectively) and dilute it to 100mL with deionized water, add it to a 250mL ground-mouth Erlenmeyer flask, and put in 0.5g of the above-mentioned fiber adsorbent (The carboxyl group content of the fiber is 6.5mmol / g), airtightly mix and shake at room temperature, take water samples at different times and measure the total nitrogen / total organic carbon analyzer in the water TN . Raw wastewater TN 70.1ppm, after shaking for 1min TN That is, down to 8.1ppm, after 5min TN down to 6.7ppm, continue to shake for 3 hours TN No significant changes. It shows that in the case of excessive fiber adsorbent, it is close to the maximum removal rate after 5 minutes of adsorption. TN The removal rate is 90.5%. This example shows that in the case of mixed contact, low wastewater concentration and excess fiber, this method not only has a fast treatment speed, but ...

Embodiment 3

[0017] Fill 2g of the above-mentioned fiber adsorbent (the carboxyl content of the fiber is 6.5mmol / g) into an adsorption column with a length of 5cm and a diameter of 1cm. 0.3% and 0.1% respectively, TN 701ppm) through the fiber adsorption column from bottom to top at a flow rate of 2mL / min, and the effluent water samples were taken at different times to measure the total nitrogen / total organic carbon analyzer in the water TN . When the effluent water volume is 0-225mL, the measured water TN The content is stable at 8.0-10ppm (for TN The removal rate is above 98.5%), when 250mL flow out TN Rise rapidly to 54ppm, when 275mL flows out TN Has risen to 274mL. It shows that when the treated water volume is about 250mL, the fiber column is close to penetration, and at this time the fiber TN The adsorption capacity is about 6.2mmol / g, which is slightly lower than the adsorption capacity of 7.4mmol / g in Example 1. This is because the fibers at the end of the adsorption column c...

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Abstract

The invention discloses a method for treating wastewater containing cycloheximide and hexamethylene diamine and belongs to the technical field of wastewater treatment. The method comprises the following steps that the wastewater containing cycloheximide and hexamethylene diamine is mixed and contacted with a fibrous adsorbent in a container or is contacted with the fibrous adsorbent in an absorption column in a flowing mode, so that cycloheximide and hexamethylene diamine in the wastewater are adsorbed by carboxyl on fibers; and after the fibers adsorb cycloheximide and hexamethylene diamine to be saturated, the obtained product is subjected to elution regeneration by diluted acid and the product can be used continuously repeatedly. The method has high adsorbing speed, high sensitivity and high adsorption capacity for amine. High-concentration amine hydrochloride in eluent can be recycled as required.

Description

technical field [0001] The invention relates to a method for treating industrial wastewater, in particular to a method for using a fiber adsorbent to treat wastewater containing cyclohexylimine and hexamethylenediamine, and belongs to the technical field of wastewater treatment. Background technique [0002] Cyclohexamethyleneimine, also known as hexamethyleneimine, azepane, etc., English name hexamethyleneimine, abbreviated as HMI, molecular formula C 6 h 13 N, molecular weight 99.17. Cyclohexylimine is not only an important organic chemical intermediate, but also a toxic and refractory organic pollutant. Hexamethylenediamine, that is, 1,6-hexamethylenediamine, also known as 1,6-diaminohexane, English name hexamethylenediamine, abbreviation HMD, molecular formula C 6 h 16 N 2 , molecular weight 116.20. Hexamethylenediamine is an important organic chemical raw material, especially for the production of nylon. Hexamethylenediamine also has certain environmental toxicit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28
Inventor 赵东赵亮沙保峰王静化林徐军用
Owner HENAN ACADEMY OF SCI CHEM RES INST CO LTD
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