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Method for preparing organic fertilizer by using aminonitrile waste liquid

An organic fertilizer and aminonitrile technology, which is applied to the preparation of organic fertilizers, organic fertilizers, and the treatment of biological organic parts. Reuse, good social benefits, and solve the effect of difficult disposal

Inactive Publication Date: 2009-03-25
四川省天然气化工研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the operation cost is high, the equipment investment is large, and the industrial practical value is not large in the treatment of high-concentration nitrile-containing wastewater, and it is not suitable for the treatment of aminonitrile waste liquid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 50kg of sodium hydroxide to 1000kg of iminodiacetonitrile production waste liquid (total cyanide 50000mg / kg), mix well, use a pump to send the waste liquid into the heater for heating, adjust the size of the steam feed, and heat it to 85°C , into the mixing reactor, the pressure is controlled at 0.3MPa, then 800kg of straw powder is added, and after stirring and mixing for 30min, 1850kg of base fertilizer is prepared and sent to the base fertilizer warehouse.

[0035] Add 5000kg of base fertilizer into the fermentation tank, mix in 500kg of rice bran, 50kg of monoammonium phosphate, and 50kg of potassium chloride, add tap water, adjust the water content to about 45%, adjust the pH to 6 with sulfuric acid, and make the initial mixture The temperature was 15°C, then 11 kg of coryneform bacteria were inserted, mixed evenly and left to ferment, and the fermentation was completed after 10 days to obtain 6200 kg of fermented product, containing 11.5% humic acid and 6.5% to...

Embodiment 2

[0038] Add 55kg sodium hydroxide in 1000kg ethylenediaminetetraacetonitrile production waste liquid (total cyanide 42000mg / kg), mix uniformly, waste liquid is sent into heating in the heater with pump, adjust the size of steam feed rate, be heated to 70 After ℃, enter the mixing reactor, the pressure is controlled at 0.1MPa, then add 850kg of straw powder, and after mixing for 30 minutes, 1900kg of base fertilizer is prepared and sent to the base fertilizer warehouse.

[0039] Add 5000kg of base fertilizer to the fermentation tank, add 500kg of rice bran, 50kg of monoammonium phosphate, and 50kg of potassium chloride, add tap water, adjust the water content to about 48%, adjust the pH to 6.2 with sulfuric acid, and make the initial The temperature of the mixture was 25° C., then 11 kg of coryneform bacteria were inserted, mixed evenly, and left to ferment. After 8 days, the fermentation was completed, and 6250 kg of fermented product was obtained, containing 11.4% humic acid an...

Embodiment 3

[0042] Continuously send iminodiacetonitrile production waste liquid (total cyanide 48000mg / kg) into the heater to heat with the speed of 1000kg / h by the waste liquid pump, by adjusting the size of the steam feed rate, after the temperature is raised to 80 ℃, with 30kg After the ammonia per hour is mixed, it enters the mixing reactor and mixes with 800 kg of straw powder for 10 minutes. The pressure is controlled at 0.2 MPa, and the material is continuously discharged to obtain 1830 kg of base fertilizer, which is sent to the base fertilizer warehouse.

[0043] Add 5000kg of the prepared base fertilizer to the fermentation tank, add 500kg of rice bran, 50kg of monoammonium phosphate, and 50kg of potassium chloride, add tap water, adjust the water content to about 42%, and adjust the pH to 6.5 with sulfuric acid. Make the temperature of the initial mixture 25° C., then insert 11 kg of coryneform bacteria, mix evenly and leave to ferment. After 8 days, the fermentation is complet...

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Abstract

The invention provides a method for preparing an organic fertilizer by utilizing amino-nitrile waste liquor, which comprises the steps: catalyst and dispersant are added in the associated amino-nitrile waste liquor generated in the preparation of iminodiacetonitrile, aminoacetonitrile, ammonium dinitrile and EDTW, and mixed for reaction at the temperature of 30 to 150 DEG C and the pressure of 0 to 1.0MPa, so as to obtain base fertilizer which is added with biological strains for fermentation of 7 to 15 days at the temperature of 10 to 60 DEG C after nutrient allocation; and then hydrolysis is carried out to the base fertilizer to obtain a raw fertilizer which is carried out with nutrient allocation, pelleting and drying to be prepared into the organic fertilizer. The method can reduce the treatment cost, effectively utilizes the resources of the water liquor, and prepare the organic fertilizer by utilizing the amino-nitrile waste liquor.

Description

Technical field: [0001] The invention belongs to the technical field of production of nitrile compounds, and in particular relates to the preparation of organic fertilizers from aminonitrile production waste liquid produced during the preparation of nitrile compounds such as iminodiacetonitrile, glycinenitrile, nitrilotrinitrile and ethylenediaminetetraacetonitrile Methods. Background technique: [0002] At present, in the production of iminodiacetonitrile, glycinenitrile, nitrilonitrile and ethylenediaminetetraacetonitrile with hydrocyanic acid or hydroxyacetonitrile, a certain amount of waste liquid that cannot be recycled is accompanied by a certain amount of waste liquid generated during the preparation process. The waste liquid generally contains aminonitrile substances such as iminodiacetonitrile, glycinenitrile, aminotriacetonitrile and ethylenediaminetetraacetonitrile, and contains inorganic ammonium salts, cyanides and nitrile polymers. The composition of the waste ...

Claims

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Application Information

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IPC IPC(8): C05F17/00C05F7/00
CPCY02A40/20Y02W30/40
Inventor 龙志成唐劲松
Owner 四川省天然气化工研究院
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