A method for resource utilization of glue clear wastewater

A technology for cleaning waste water and reusing glue, applied in organic chemistry, ether separation/purification, ether preparation, etc., can solve the problems of difficult recovery of membrane fouling flux, unstable product quality, high cost of membrane replacement, etc., and meet the load of subsequent processes Small size, stable product quality, and excellent product quality

Active Publication Date: 2015-11-18
JIANGSU JIUWU HITECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the domestic method of utilizing whey wastewater, there are some reports, such as a patent (application number: 201110363990.1) has reported a method for reclaiming skim rubber, which uses hollow fiber membranes to filter the skim wastewater, and the concentration factor needs to be controlled at 5- Within 8 times, the membrane fouling flux is difficult to recover, the membrane is easy to break and leak during use, the product quality is unstable, and the cost of membrane replacement is high
Patent (Application No.: 201310007459.X) reports a method for extracting quebranol from natural rubber rubber-making wastewater. This method uses heating to remove solid glue and flocs, which has high energy consumption and waste of resources. The full-membrane method is used Separation process, low product purity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take fresh natural rubber latex from the rubber factory after centrifugation, and filter it through an alumina microfiltration membrane. The average pore size is 200nm, the transmembrane pressure difference is 0.1MPa, and the membrane surface flow rate is 1m / s. The wastewater is concentrated to obtain 1L of concentrated liquid and 9L of microfiltration permeate, and then the microfiltration permeate is sent to a zirconia ultrafiltration membrane for filtration. The average pore size of the ultrafiltration membrane is 20nm and the transmembrane pressure difference is 0.3MPa. The membrane surface flow rate is 2m / s, and ultrafiltration permeate is obtained.

[0028] The ultrafiltration permeate is then sent to a medium-polarity resin column (column volume 2L) with a flow rate of 1BV / h. After processing, it is eluted with 50% methanol (2L). The eluent is collected, filtered and distilled under reduced pressure to obtain 200g concentration. After standing at 0℃ for 24 hours, th...

Embodiment 2

[0032] Take fresh natural rubber latex from the rubber factory after centrifugation, and filter it through the alumina microfiltration membrane. The average pore size is 200nm, the transmembrane pressure difference is 0.5MPa, and the membrane surface flow rate is 1m / s. The wastewater is concentrated to obtain 1L of concentrated liquid and 9L of microfiltration permeate, and then the microfiltration permeate is sent to a zirconia ultrafiltration membrane for filtration. The average pore size of the ultrafiltration membrane is 20nm and the transmembrane pressure difference is 0.3MPa. The membrane surface flow rate is 2m / s, and ultrafiltration permeate is obtained.

[0033] The ultrafiltration permeate is then sent to a medium-polarity resin column (column volume 2L) with a flow rate of 1BV / h. After processing, it is eluted with 50% methanol (2L). The eluent is collected, filtered and then distilled under reduced pressure to obtain 200g concentration. After standing at 0℃ for 24h, t...

Embodiment 3

[0037] Take fresh natural rubber latex from the rubber factory after centrifugation, and filter it through an alumina microfiltration membrane. The average pore size is 50nm, the transmembrane pressure difference is 0.1MPa, and the membrane surface flow rate is 1m / s. Concentrate the wastewater to obtain 1L of concentrated liquid and 9L of microfiltration permeate. Adjust the pH of the microfiltration permeate to about 3.0~4.0, and then send it to the zirconia ultrafiltration membrane for filtration. The average pore size of the ultrafiltration membrane is 20nm , The transmembrane pressure difference is 0.3MPa, and the membrane surface flow rate is 2m / s to obtain ultrafiltration permeate.

[0038] The ultrafiltration permeate is then sent to a medium-polarity resin column (column volume 2L) with a flow rate of 1BV / h. After processing, it is eluted with 50% methanol (2L). The eluent is collected, filtered and then distilled under reduced pressure to obtain 200g concentration. The c...

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Abstract

The invention relates to a method for resource utilization of skim serum, and in particular relates to a method for recycling rubber and quebrachitol from skim serum, which belongs to the technical field of resource utilization of rubber. The method comprises the following steps: 1, filtering the skim serum by a micro-filtration membrane so as to obtain a micro-filtration concentrated liquid and a micro-filtration penetrating fluid; 2, adding a sulfuric acid solution into the micro-filtration concentrated liquid for solidifying, and drying the obtained solid so as to obtain recycled rubber; 3, filtering the micro-filtration penetrating fluid by an ultra-filtration membrane so as to obtain an ultra-filtration concentrated liquid and an ultra-filtration penetrating fluid; 4, feeding the ultra-filtration penetrating fluid into a resin for purifying, subsequently eluting so as to obtain an eluant, and crystallizing and re-crystallizing the eluant so as to obtain a quebrachitol crystal. By the method, dried rubber and quebrachitol can be simultaneously recycled from the skim serum, the waste resource is effectively recycled, and great social benefits, environment benefits and economic benefits are obtained.

Description

technical field [0001] The invention relates to a method for resource utilization of glue clear wastewater, in particular to a method for recovering rubber and quebranol from glue clear waste water, and belongs to the technical field of rubber resource utilization. Background technique [0002] Natural rubber is an indispensable strategic material and scarce resource for national defense and economic construction. It is not only the lifeblood of the modern economy, but also a military and diplomatic resource. In daily use, the output of concentrated latex accounts for about 10% to 15% of the total output of natural rubber. The waste water from rubber clearing comes from the processing of concentrated latex. Fresh natural latex collected from rubber trees is divided into 40% concentrated latex after passing through a centrifuge. And 60% latex two parts. About 15% of the rubber hydrocarbons in the fresh latex remain in the skim along with most of the non-glue components. In a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08C1/04C08C1/075C08C1/15C07C43/196C07C41/34
Inventor 姜海凤彭文博李静寇琴张宏范克银
Owner JIANGSU JIUWU HITECH
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