Method for resource utilization of skim serum

A technology of skim waste water and resource utilization, which is applied in organic chemistry, ether separation/purification, ether preparation and other directions, can solve the problems of difficult recovery of membrane fouling flux, unstable product quality, and high cost of membrane replacement, and achieve the subsequent process load. Small, stable product quality, excellent product quality effect

Active Publication Date: 2014-04-16
JIANGSU JIUWU HITECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the domestic method of utilizing whey wastewater, there are some reports, such as a patent (application number: 201110363990.1) reporting a method for reclaiming skim rubber, which uses a hollow fiber membrane 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

[0033] Take fresh natural rubber latex from a rubber factory and centrifuge 10 L of rubber-clear waste water. First, filter it through an alumina microfiltration membrane. The average pore size is 200 nm, the transmembrane pressure difference is 0.1 MPa, and the membrane surface velocity is 1 m / s. Concentrate the glue clear wastewater to obtain 1 L of concentrated solution and 9 L of microfiltration permeate, and then send the microfiltration permeate to the zirconia ultrafiltration membrane for filtration. The average pore size of the ultrafiltration membrane is 20 nm. The membrane pressure difference is 0.3 MPa, and the membrane surface flow velocity is 2 m / s to obtain ultrafiltration permeate.

[0034] The ultrafiltration permeate is then sent to a medium polar resin column (column volume 2L) with a flow rate of 1BV / h. After treatment, it is eluted with 50% methanol (2L), and the eluate is collected. After suction filtration, vacuum distillation yields 200g concentrated Aft...

Embodiment 2

[0039] Take 10 L of centrifuged fresh natural rubber latex waste water from a rubber factory, and first filter it through an alumina microfiltration membrane. The average pore size is 200 nm, the transmembrane pressure difference is 0.5 MPa, and the membrane surface velocity is 1 m / s. Concentrate the glue clear wastewater to obtain 1 L of concentrated solution and 9 L of microfiltration permeate, and then send the microfiltration permeate to the zirconia ultrafiltration membrane for filtration. The average pore size of the ultrafiltration membrane is 20 nm. The membrane pressure difference is 0.3 MPa, and the membrane surface flow velocity is 2 m / s to obtain ultrafiltration permeate.

[0040] The ultrafiltration permeate is then sent to a medium polar resin column (column volume 2L) with a flow rate of 1BV / h. After treatment, it is eluted with 50% methanol (2L), and the eluate is collected. After suction filtration, vacuum distillation yields 200g concentrated After standing s...

Embodiment 3

[0045] Take fresh natural rubber latex from a rubber factory and centrifuge 10 L of rubber-clear waste water. First, filter it through an alumina microfiltration membrane. The average pore size is 50 nm, the transmembrane pressure difference is 0.1 MPa, and the membrane surface flow rate is 1 m / s. Concentrate the glue clear wastewater to obtain 1 L of concentrated solution and 9 L of microfiltration permeate, adjust the pH of the microfiltration permeate to about 3.0 to 4.0, and then send it to the zirconia ultrafiltration membrane for filtration. The average pore size is 20 nm, the transmembrane pressure difference is 0.3 MPa, and the membrane surface velocity is 2 m / s, and the ultrafiltration permeate is obtained.

[0046] The ultrafiltration permeate is then sent to a medium polar resin column (column volume 2L) with a flow rate of 1BV / h. After treatment, it is eluted with 50% methanol (2L), and the eluate is collected. After suction filtration, vacuum distillation yields 20...

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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

[0001] technical field [0002] 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. [0003] Background technique [0004] 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-g...

Claims

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Application Information

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Patent Type & Authority Applications(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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