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Method for drying and solidifying saponified alkali waste liquid and saponified powder

A waste lye and saponification technology, which is applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of not being effectively solved, wasting energy, etc., and achieve effective treatment, The effect of good economic value and broad and in-depth development prospects

Inactive Publication Date: 2011-09-28
湖南新华联国际石油贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This incineration treatment also still wastes a lot of energy, and a large amount of CO will be emitted during the treatment process. 2 The problem
[0005] To sum up, in the existing process of generating cyclohexanone by oxidation of cyclohexane, the problem that a large amount of saponification waste lye needs to be processed has not been effectively solved, so it is necessary to improve this

Method used

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  • Method for drying and solidifying saponified alkali waste liquid and saponified powder
  • Method for drying and solidifying saponified alkali waste liquid and saponified powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment is the best embodiment of the present invention. A saponification waste lye treatment method, the saponification waste lye is first changed its chemical properties by adding CO2 and additives, and then distilled to make the water discharge up to the standard; then filtered, and the filtrate is returned to distillation, repeated more than two times, until saponified The water in the waste lye is completely evaporated; the filter residue is dried and solidified into raw saponified powder. The specific process of saponification waste lye treatment is as follows:

[0023] 1. First, use an evaporator, control the suitable temperature of the evaporator to be 100-140°C, and the pressure to be -0.5MPa to evaporate the saponification waste lye, and evaporate most of the water in the waste lye, so that The saponified solution reaches a suitable density;

[0024] 2. Introduce excessive CO2 gas and additives into the concentrated saponification waste lye to change...

Embodiment 2

[0034] The manufacturing method of this embodiment is the same as that of Embodiment 1. Only because the composition of the saponification waste lye is different, the composition of the obtained saponification powder is different. The composition of the saponification powder made is:

[0035] Ingredient content (weight percent)

[0036] Sodium salt of organic acid 41.8%

[0037] Sodium Bicarbonate / Sodium Carbonate 57.8%

[0038] Water 0.4%

Embodiment 3

[0040] The manufacturing method of this embodiment is the same as that of Embodiment 1. Only because the composition of the saponification waste lye is different, the composition of the obtained saponification powder is different. The composition of the saponification powder made is:

[0041] Ingredient content (weight percent)

[0042] Sodium salt of organic acid 61.6%

[0043] Sodium Bicarbonate / Sodium Carbonate 37.6%

[0044] Water 0.8%

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Abstract

The invention relates to a method for drying and solidifying saponified alkali waste liquid, comprising the following steps: changing the chemical nature of the saponified alkali waste liquid by adding CO2 and accessory ingredients; distilling the mixture to discharge the mixture after the mixture reaches the discharging standards; then filtering the mixture and distilling the filtrate for more than twice until moisture in the saponified alkali waste liquid is completely evaporated; and finally, drying and solidifying the filter residue to generate raw saponified powder. The saponified powderprepared according to the method of the invention has the following components in percentage by weight: 51.8% of organic acid sodium salt, 47.6% of sodium bicarbonate / sodium carbonate and 0.6% of water.

Description

technical field [0001] The invention relates to a method for preparing chemical raw materials, in particular to a method for drying saponified waste lye, and to a new type of chemical raw material—saponification powder—produced by the technical method. It belongs to the technical field of chemical industry. Background technique [0002] In the process of generating cyclohexanone by oxidation of cyclohexane, a large amount of saponification waste lye will be produced, and if these saponification waste lye are not treated, they will cause serious environmental pollution; at present, the comprehensive utilization of this waste lye is internationally recognized It is still a difficult problem. Domestic manufacturers are now using burning methods to deal with it, but this not only wastes a lot of energy and precious resources, but also emits a lot of CO that pollutes the environment. 2 ; There is also the patented extraction technology for processing, but this will produce new s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10
Inventor 杨云华
Owner 湖南新华联国际石油贸易有限公司