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Production of potassium contained chemical products from waste liquid of molasses alcohol production

A technology for molasses alcohol waste liquid and chemical products, applied in chemical instruments and methods, water/sludge/sewage treatment, sludge treatment, etc., can solve the problems of unsuitable production of potassium chemical products, complex depotassiation process, and difficulty in refining potassium salts and other problems, to achieve the effect of easy operation, simple process and low investment

Inactive Publication Date: 2005-06-22
桂林矿产地质研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A solution that is too dilute or too concentrated is not good for the depotassiation reaction
"The molasses alcohol waste liquid contains a large amount of insoluble organic matter. If the insoluble organic matter is taken out together with the potassium salt during separation, it will be difficult to refine the potassium salt. It can only be applied to farmland as a high-quality potassium-containing fertilizer.
The depotassium process of patent 97115798.7 is complicated and consumes a lot of energy, so it is not suitable for the production of potassium chemical products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Send the molasses alcohol waste liquid discharged from the alcohol distillation tower to a disc centrifuge to separate insoluble organic matter, store the filtrate in the reaction tank, add 50-60 kg of solid tartaric acid per ton of molasses alcohol waste liquid, and stir evenly for one hour Finally, let it stand naturally for 4 hours, then separate it with a SS centrifuge, add water into the centrifuge after separation, wash the potassium hydrogen tartrate crystals in the machine until white, take it out and dry it at low temperature, you can get high-quality tartaric acid Potassium Hydrogen Products. The product has been tested and contains only a very small amount of Cu and SO 4 2- Ions can fully meet the standard of industrial grade potassium hydrogen tartrate.

Embodiment 2

[0020] Send the molasses alcohol waste liquid discharged from the alcohol distillation tower to a microfilter to separate insoluble organic matter, store the filtrate in the reaction tank, add 35-40 kg of perchloric acid per ton of molasses alcohol waste liquid, and stir evenly for 0.5 hours , let it stand naturally for 4 hours, then filter and separate the precipitate with a filter, wash it with water in the filter until white, then take it out and dry it with airflow, and then you can get a qualified potassium perchlorate product.

Embodiment 3

[0022] The molasses alcohol waste liquid discharged from the alcohol distillation tower is flocculated with 0.1% PAM flocculant and 5% PVC macromolecular inorganic flocculant, and the insoluble organic matter is removed by air flotation, and then obtained according to the subsequent process steps of embodiment 1 or embodiment 2 The corresponding potassium salt crystallized. However, the quality of the product obtained by the method is affected by the removal rate of insoluble organic matter, and the removal method of insoluble organic matter is not as stable as using a centrifuge with a flocculant. Moreover, when flocculants are used, flocculant ions will be brought into the product, affecting product quality.

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Abstract

A method of chemically treating molasses alcohol waste liquid from sugar factories to produce potassium chemical products, that is, the waste liquid is firstly separated by centrifuge, flocculant separation or microfiltration to remove insoluble organic matter, and then placed in the reaction tank Add tartaric acid, perchloric acid or sodium tetraphenylborate, stir and let it stand, and react to form a potassium salt crystal precipitate, separate the potassium salt crystal precipitate from the raffinate, wash, dehydrate, and dry to obtain the corresponding industrial-grade potassium salt. After further processing and reaction, the desired potassium chemical product is made. The potassium-removing agent (tartaric acid or perchloric acid or sodium tetraphenylborate) used in the method can be recycled and reused, and the molasses alcohol waste liquid after the potassium removal can be more beneficial to extract other products therefrom or be directly concentrated to make animal feed additives.

Description

(1) Technical field: [0001] The invention relates to a comprehensive utilization technology of molasses alcohol waste liquid in a sugar factory, in particular to a method for processing the molasses alcohol waste liquid of a sugar factory in a chemical reaction mode to produce potassium chemical products. (two) background technology: [0002] Molasses alcohol waste liquid is the waste liquid discharged after the by-product molasses produced in the sugar factory is fermented and the alcohol is distilled out of the mash. These waste liquids contain potassium and other metal elements, as well as a large amount of organic matter, the color is dark brown, and the COD reaches 130,000mg / l. According to the measurement of the molasses alcohol waste liquid provided by some sugar factories, the weight percentage of each component is: K + 0.31~1.4,Na + 0.0036~0.0063, Cu 2+ 0.077, Mg 2+ 0.012, Fe 3+ 0.0098, P(P 2 o 5 )0.0011, SO 4 2- (to BX degree) 0.17~0.55, colloid (g / l) 5.33...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C02F1/38C02F1/44C02F1/52C02F11/00
Inventor 扈胜禄李坚斌孙伟刘慧霞张生炎黄伟王玉宾
Owner 桂林矿产地质研究院
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