Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method used for recovery preparation of aluminum potassium sulfate from activated clay production waste water

A technology for the production of waste water and activated clay, applied in chemical instruments and methods, aluminum sulfur compounds, aluminum sulfate, etc., can solve the problems of waste of aluminum elements, and achieve the effects of short production cycle, high purity and low production cost

Inactive Publication Date: 2016-03-16
罗永城
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to provide a method for recovering and producing potassium alum from activated clay production wastewater, so as to solve the problem that the existing activated clay production wastewater treatment method causes a great waste of aluminum elements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method used for recovery preparation of aluminum potassium sulfate from activated clay production waste water
  • Method used for recovery preparation of aluminum potassium sulfate from activated clay production waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for reclaiming potassium alum from activated clay production wastewater, comprising the following steps:

[0031] S1: The activated clay production wastewater is mixed with bentonite at a temperature of 90°C to dissolve the aluminum oxide of bentonite in the activated clay production wastewater, and then the activated clay production wastewater with increased concentration of aluminum sulfate is recycled and mixed with the newly added bentonite , so that the aluminum sulfate dissolved in the activated clay production wastewater reaches saturation;

[0032] S2: The activated clay production waste water that the aluminum sulfate obtained in step S1 reaches saturation is 86 ℃ through controlling temperature, and potassium hydrogensulfate is added under the pH value of 4.1, and the amount of potassium hydrogensulfate added is such that K in potassium alum + :Al 3+ :SO 4 2- The molar concentration ratio is 1.01:1:2.02, and the reaction generates potassium alum; ...

Embodiment 2

[0037] A method for reclaiming potassium alum from activated clay production wastewater, comprising the following steps:

[0038] S1: The activated clay production wastewater is mixed with bentonite at a temperature of 92°C, so that the aluminum oxide of bentonite is dissolved in the activated clay production wastewater, and then the activated clay production wastewater with an increased concentration of aluminum sulfate is recycled and mixed with the newly added bentonite , with such a process step cycle operation 4 times, until the aluminum sulfate dissolved in the activated clay production wastewater reaches saturation;

[0039] S2: the activated clay production waste water that the aluminum sulfate obtained in step S1 reaches saturation is 88 ℃ through controlling temperature, and potassium hydrogensulfate is added under the pH value of 4.2, and the amount of potassium hydrogensulfate added is to make NH in potassium alum 4 + :Al 3+ :SO 4 2- The molar concentration rat...

Embodiment 3

[0044] A method for reclaiming potassium alum from activated clay production wastewater, comprising the following steps:

[0045] S1: The activated clay production wastewater is mixed with bentonite at a temperature of 91°C, so that the aluminum oxide of bentonite is dissolved in the activated clay production wastewater, and then the activated clay production wastewater with an increased concentration of aluminum sulfate is recycled and mixed with the newly added bentonite , cyclically operate 3 times with such process steps, until the aluminum sulfate dissolved in the activated clay production wastewater reaches saturation;

[0046] S2: The activated clay production waste water that the aluminum sulfate obtained in step S1 reaches saturation is 87 ℃ through controlling temperature, and potassium hydrogensulfate is added under the pH value of 4.2, and the amount of potassium hydrogensulfate added is to make NH in potassium alum 4 + :Al 3+ :SO 4 2- The molar concentration r...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method used for recovery preparation of aluminum potassium sulfate from activated clay production waste water, and belongs to the technical field of waste water treatment and inorganic salt preparation. According to the invention, activated clay production waste water and bentonite are recycled for a plurality of times until saturation of aluminum sulfate dissolved in the mixture of activated clay production waste water and bentonite is achieved, the mixture is reacted with potassium hydrogen sulfate, and aluminum potassium sulfate with the purity raging from 99.87 to 99.92% is obtained via two times of crystallization. The method can be used for treating activated clay production waste water effectively, full utilization of aluminium element in activated clay production waste water is realized, energy is saved, emission is reduced, waste is changed into valuables, effective utilization of energy of coal smoke exhausted gas is realized, and aluminum potassium sulfate is dried at a higher temperature, so that production period of the method is shorter than that of the prior art.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment and inorganic salt preparation, in particular to a method for recovering and preparing potassium alum from activated clay production wastewater. Background technique [0002] Activated clay is mainly used for the decolorization and refining of mineral oil, vegetable oil and animal fat. It is an important petrochemical and daily chemical raw material. Activated clay is made of bentonite as raw material, mainly processed by wet acidification process. The production process includes: hydration of bentonite, activation with sulfuric acid, water washing, drying and pulverization. Because the product contains a lot of acid, it needs to be washed repeatedly to make the acid content less than 0.2%, so as to meet the requirements of HG / T2569-94 product standard. Depending on the method, the amount of wastewater generated during the washing process varies to a certain extent, but the amount o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01F7/76
CPCC01F7/762C01P2006/80C01P2006/82
Inventor 罗永城
Owner 罗永城
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com