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Method for preparing amino acid chelated fertilizer by using chrome leather solid wastes

A solid waste and amino acid technology, applied in application, fertilization equipment, fertilizer mixture, etc., can solve the problems of high cost, inability to be absorbed and utilized by plants, and difficulty in popularization, and achieve the effects of easy operation, significant increase in production, and simple process

Inactive Publication Date: 2013-01-30
罗星 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the medium and trace element fertilizers are inorganic salts, which will inevitably have antagonism and chemical reactions between medium and trace elements, and will interact with various ions in the soil in the soil, so that most elements are fixed by the soil and cannot be absorbed by plants. use
Chelating agents such as citric acid and EDTA can solve these problems well, but their cost is so high that it is difficult to popularize

Method used

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  • Method for preparing amino acid chelated fertilizer by using chrome leather solid wastes
  • Method for preparing amino acid chelated fertilizer by using chrome leather solid wastes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Pretreatment

[0033] Trim 300kg of chrome leather solid waste into strips with a width of 1cm, add 1000L of water to soak and clean, remove and add 3000L of water, 60kg of lime, and 3kg of glucose to the pool, stir regularly, and soak for 4 days.

[0034] (2) Acid dechromation

[0035] Press filter the leather soaked in step (1), add 300L of hydrochloric acid with a concentration of 1mol / L and soak for 2 hours, filter and rinse with water.

[0036] (3) Acid hydrolysis

[0037] Wash and filter the leather in step (2), put it into a 3000L enamel reaction kettle, add 300kg of hydrochloric acid with a concentration of 6mol / L and 3kg of urea, heat to 100°C for 3 hours, and recover the steamed hydrochloric acid during the reaction.

[0038] (4) Preparation of amino acid chelate fertilizer

[0039] After cooling the hydrolyzate in step (3), add caustic soda to adjust the pH value to 4. Join ZnSO 4 .7H 2 O 60kg, FeSO 4 .7H 2 O100kg, MnSO 4 .H 2 O 50kg, CuSO4.5H ...

Embodiment 2

[0041] (1) Pretreatment

[0042] Trim 300kg of chrome leather solid waste into strips with a width of 1cm, add 1000L of water to soak and clean, remove and add 6000L of water, 120kg of lime, and 6kg of glucose to the pool, stir regularly, and soak for 4 days.

[0043] (2) Acid dechromation

[0044] Press filter the leather soaked in step (1), add 300L hydrochloric acid with a concentration of 4mol / L, soak for half an hour, filter, and rinse with water.

[0045] (3) Acid hydrolysis

[0046] Wash and filter the leather in step (2), put it into a 3000L enamel reaction kettle, add 100kg of hydrochloric acid with a concentration of 12mol / L and 3kg of urea, heat to 115°C for 1 hour, and recover the steamed hydrochloric acid during the reaction.

[0047] (4) Preparation of amino acid chelate fertilizer

[0048] After cooling the hydrolyzate in step (3), add concentrated ammonia water to adjust the pH value to 6. Join ZnSO 4 .7H 2 O 60kg, FeSO 4 .7H 2 O50kg, MnSO 4 .H 2 O 80...

Embodiment 3

[0050] (1) Pretreatment

[0051] Trim 300kg of chrome leather solid waste into strips with a width of 1cm, add 1000L of water to soak and clean, remove it and add 3000L of water, 120kg of lime, and 6kg of glucose to the pool, stir regularly, and soak for 2 days.

[0052] (2) Acid dechromation

[0053] Press filter the leather soaked in step (1), add 300L of hydrochloric acid with a concentration of 4mol / L and soak for 1 hour, filter and rinse with water.

[0054] (3) Acid hydrolysis

[0055] Wash and filter the leather in step (2), put it into a 3000L enamel reaction kettle, add 300kg of hydrochloric acid with a concentration of 4mol / L and 6kg of urea, heat to 115°C for 3 hours, and recover the steamed hydrochloric acid during the reaction.

[0056] (4) Preparation of amino acid chelate fertilizer

[0057] After cooling the hydrolyzate in step (3), add caustic soda to adjust the pH value to 5. Join ZnSO 4 .7H 2 O 160kg, MnSO 4 .H 2 O100kg, CuSO4.5H 2 O 50kg, borax 10kg,...

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Abstract

The invention relates to resource utilization of chrome leather solid wastes, in particular to a method for preparing an amino acid chelated fertilizer by using chrome leather solid wastes. According to the invention, the method comprises the following steps of: using the chrome leather wastes as raw materials, dechroming and hydrolyzing the chrome leather wastes so as to generate an amino acid, and then chelating trace elements so as to prepare the amino acid chelated fertilizer. The method for preparing the amino acid chelated fertilizer by using the chrome leather solid wastes, provided by the invention, has the advantages of simple process and easiness in operation; collagens in the chrome leather solid wastes are completely hydrolyzed to be chelated with the trace elements so as to prepare the chelated fertilizer; the chrome content of the chelated fertilizer is less than national standard; and the chelating rate of the collagens and the trace elements is more than 95%. The chelated fertilizer prepared by using the method provided by the invention can be used for leaf surface spraying, seed soaking and root pouring and has an obvious effect on yield increase of crops.

Description

technical field [0001] The invention relates to resource utilization of chrome leather solid waste, in particular to a method for preparing amino acid chelate fertilizer from chrome leather solid waste. Background technique [0002] The tanning industry produces a large amount of solid waste every year, of which chrome leather solid waste accounts for more than 60%, and collagen in chromium-containing waste accounts for about 80%. How to make full use of this resource and reduce chromium pollution has done a lot of research work both at home and abroad. In recent years, research has mainly focused on extracting collagen. However, due to the incomplete separation of chromium from collagen and the wide molecular weight distribution of the extracted products, the use of these collagens is limited. Some criminals use this collagen in the feed and food industries, which has brought great harm to our food safety. Hidden danger. [0003] Therefore, the preparation of chrome leath...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 罗星李华阚义
Owner 罗星
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