Method for processing wastewater produced in saponification cyclization step in epoxy chloropropane production method

A technology of epichlorohydrin and treatment method, which is applied in the fields of water/sewage multi-stage treatment, heating water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as environmental pollution and impact on technical application

Active Publication Date: 2010-08-11
NINGBO HUANYANG CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such calcium chloride dihydrate can cause environmental pollution when used as a deicing agent
[0018] As can be seen from the prior art described above, there are many defects in the prior art, which seriously affect the application of

Method used

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  • Method for processing wastewater produced in saponification cyclization step in epoxy chloropropane production method
  • Method for processing wastewater produced in saponification cyclization step in epoxy chloropropane production method
  • Method for processing wastewater produced in saponification cyclization step in epoxy chloropropane production method

Examples

Experimental program
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Effect test

Embodiment 1

[0117] Concentrate dichloropropanol dehydrochlorination saponification cyclization waste water, the composition of solution after concentration is 100gCaCl 2 / 100gH 2 O and 3.1g glycerol / 100g H 2 O. Get the solution 131.3g of this composition, be divided into two parts, one part is about 1 / 3 of the total weight of the solution, and the other part is 2 / 3 of the total weight of the solution, respectively put into a 150ml beaker, wherein the first Calcium chloride hexahydrate crystals are precipitated at low temperature. The beaker that has separated out the calcium chloride hexahydrate crystal and another part of the beaker that said solution is housed are put into a water bath, and the temperature of the water bath is controlled at 18°C, and the slurry of the calcium chloride hexahydrate crystal is slowly stirred with an agitator, and the Slowly pour another uncrystallized solution that has been cooled to 18°C ​​into the slurry, keep the temperature of the slurry at 20°C for...

Embodiment 2

[0123] First, assemble a set of macroporous resin adsorption columns for laboratory use. DM130 macroporous adsorption resin is soaked in ethanol repeatedly for several times, and then pretreated by fully rinsing with clean water, and then the macroporous resin with a particle size of 50-20 mesh is screened. Use the natural sedimentation method to fill 150cm in the Φ29×500cm glass adsorption column 3 DM130 macroporous resin.

[0124] This example uses the filtrate obtained in Example 1, which contains 41% by weight of CaCl based on the total weight of the filtrate 2 and 9% by weight glycerin.

[0125] The filtrate was injected into the DM130 macroporous resin adsorption column at a flow rate of 0.2 m / min, and then the change of glycerol concentration in the effluent was detected by the method of GB / T13216.6-91. When the concentration of glycerol in the effluent reached 1.0% by weight, the injection of the original waste liquid was stopped.

[0126] The adsorption column sat...

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Abstract

The invention relates to a method for processing organic saponification high-salinity wastewater produced in the production processes of epoxy chloropropane and epoxy-propane. The processing method comprises the steps of concentration of organic high-salinity wastewater, crystallization of calcium chloride, purification and recycling, innocent treatment of mother liquid and the like. The method has simple and convenient technical process, easy operation and control, obvious economic benefit, and environmental protection; the recovery rate of calcium chloride can reach 98%, and the recovery rate of glycerine can reach 88%, thereby changing pollutant into resources.

Description

【Technical field】 [0001] The invention belongs to the technical field of high-salt organic wastewater treatment. More specifically, the present invention relates to a method for treating high-salinity organic wastewater produced in epichlorohydrin and propylene oxide production processes, which includes recovering calcium oxide by-products and recovering glycerin from the high-salinity organic wastewater, Realize the recycling of pollutants. 【Background technique】 [0002] Epichlorohydrin, also known as epichlorohydrin, is an important organic chemical raw material, mainly used in the production of epoxy resin, glass fiber reinforced plastics, electrical insulation materials, surfactants, medicines, pesticides, coatings, ion exchange resins, plasticizers, chlorine Alcohol rubber. [0003] At present, the traditional industrial production methods of epichlorohydrin include propylene high-temperature chlorination method and propylene acetate method. The production capacity o...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F1/04C02F101/12C02F101/34C02F101/36
Inventor 施德龙沈作为姜民选车学兵董平符林健高兵强
Owner NINGBO HUANYANG CHEM
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