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Spinning finish waste water demulsifying agent and method for preparing same

The technology of spinning oil and demulsifier is applied in the field of nylon spinning oil wastewater demulsifier and its preparation, which can solve the problems of large dosage, and achieve the effects of low cost, simple process and small dosage.

Inactive Publication Date: 2007-08-15
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The test shows that Tween 20 and n-amyl alcohol compound have obvious demulsification effect under room temperature and weak acidic conditions, but the same dosage is very large (≥4%, that is, more than 40 kilograms need to be put in 1 ton of spinning finish wastewater demulsifier)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1, spinning oil waste water demulsifier, is made up of cetyltrimethylammonium bromide, sodium nitrite and disodium edetate, cetyltrimethylammonium bromide, nitrous acid The mass ratio of sodium to disodium edetate is 15:1:1. The preparation method is as follows: respectively grind cetyltrimethylammonium bromide (CTMAB, content > 98%), sodium nitrite (industrial grade) and disodium ethylenediaminetetraacetic acid (EDTA, industrial grade), Pass through a 80-mesh sieve, mix evenly according to the mass ratio, seal in a plastic bag, and store in a dark place at room temperature.

Embodiment 2

[0014] Embodiment 2. In this embodiment, the mass ratio of cetyltrimethylammonium bromide, sodium nitrite and disodium edetate is 20:2:1, and the others are the same as in embodiment 1.

Embodiment 3

[0015] Embodiment 3. In this embodiment, the mass ratio of cetyltrimethylammonium bromide, sodium nitrite and disodium edetate is 25:3:1, and the others are the same as in Embodiment 1.

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PUM

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Abstract

A spin finishes waste-water demulsifying agent and its method for preparation belong to the field of waste treatment technique. It consists of cetyl trimethyl ammonium bromide, sodium nitrite and disodium editate, the quality ratio of which is 15-25:1-3:1. The method for preparation is as below: jevigating cetyl trimethyl ammonium bromide (CTMAB, content>98%), sodium nitrite (technical grade) and disodium editate (EDTA, technical grade), riddling 80-mesh sifter, mixing homogeneously according to quality rate, pressurizing by plastic bag, reserving in dark and indoor temperature. The technique about demulsifying agent of preparation of this invention is simple, and the quantity of demulsifying agent to cope with spin finishes waste-water is little, operation is easy (no PH, no agitatting), cost is low.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, in particular to a nylon spinning oil wastewater demulsifier (DEMUL-B1) and a preparation method thereof. Background technique [0002] Nylon spinning oil wastewater is mainly composed of three parts: oil workshop wastewater, winding workshop wastewater and spinning fume filter wastewater. The appearance is a stable white emulsion, and the chemical oxygen demand (COD Cr ) up to 100,000-300,000mg / L, the oil content is 10,000-40,000mg / L, and the turbidity is 10,000-30,000TU. Gas chromatography and mass spectrometry test analysis showed that nylon spinning oil wastewater contained mineral oil, fatty acid, surfactant, emulsifier and lubricating oil and other components. There are both hydrophilic polar groups and lipophilic non-polar groups in the emulsifier molecule, which can be adsorbed at the water interface and at the oil interface to form an interfacial film. This interfacial film...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/40C02F1/52
Inventor 张宏忠方少明程海军叶长明
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY