Preparation method of environment-friendly snow-melting agent

An environmentally friendly deicing agent technology, applied in the field of environmentally friendly deicing agent preparation, can solve the problems of increasing the cost of solid waste treatment, increasing the cost of sewage treatment, low purity of lactic acid, etc., to solve the problem of salinization, enhance the absorption of light, The effect of improving water solubility

Active Publication Date: 2022-03-01
潍坊海之源化工有限公司
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AI Technical Summary

Problems solved by technology

At present, the production method of D / L-lactic acid is mainly biological fermentation method, and fermentation produces a large amount of bacterial waste residue, which is directly treated as solid waste by manufacturers, which not only causes environmental pollution, but also increases the cost of solid waste treatment
At the same time, a large amount of lactic acid waste liquid will be produced in the post-extraction molecular distillation preparation process of its D / L-lactic acid, which still contains a large amount of lactic acid. If the lactic acid waste liquid is directly discharged, it will not only increase the treatment cost of sewage, but also Causes loss of lactic acid in effluent
Lactic acid manufacturers generally re-extract lactic acid, and other impurities (such as coloring, sticky substances, etc.) will be mixed in the re-extraction process, resulting in low purity and high cost of re-extracted lactic acid. low rate

Method used

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  • Preparation method of environment-friendly snow-melting agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] S1. Take 40L of lactic acid fermentation broth with a dry weight of 8% (w / w) of bacteria and filter and concentrate it with a 50nm ceramic membrane to obtain 35L of supernatant liquid and 5L of dense phase bacterial residue waste liquid, dense phase bacterial residue waste The dry weight of bacteria in the solution accounts for 50% (w / w), and the amount of protein in the bacteria is obtained by multiplying the quality of organic nitrogen source by 6.25, and the protein amount accounts for 40% (w / w) of the dense phase bacterial residue waste liquid;

[0034] S2. Place the 5L dense phase slag waste liquid obtained in step 1 in the acidolysis reaction kettle, add 6mol / L sulfuric acid through a peristaltic pump at 80ml / min, stir while adding, add the sulfuric acid in the reaction solution to the end The concentration is 2 mol / L, hydrolyzed for 12 hours under the condition of normal pressure 110 ℃, and the degree of hydrolysis is 72%. Then adjust the pH to the end point 7.0 ...

Embodiment 2

[0042] S1. Take 40L of lactic acid fermentation broth with a dry weight of 7% (w / w) of bacteria and filter and concentrate it with a 50nm ceramic membrane to obtain 35L of clear liquid and 5L of dense phase bacterial residue waste liquid, dense phase bacterial residue waste The dry weight of bacteria in the liquid accounts for 48% (w / w), and the protein content of the bacteria is obtained by multiplying the quality of organic nitrogen source by 6.25, and the protein content accounts for 38.4% (w / w) of the dense phase bacterial residue waste liquid;

[0043] S2. Place the 5L dense phase slag waste liquid obtained in step 1 in the acidolysis reaction kettle, add 6mol / L sulfuric acid through a peristaltic pump at 80ml / min, stir while adding, add the sulfuric acid in the reaction solution to the end Concentration 2mol / L, hydrolyzed at normal pressure 110°C for 12h, the degree of hydrolysis was 71%. Then adjust the pH to the end point 7.0 with ammonia water with a mass fraction of ...

Embodiment 3

[0050] S1. Take 40L of lactic acid fermentation broth with a dry weight of bacteria accounting for 6% (w / w) and filter and concentrate it with a 50nm ceramic membrane to obtain 35L of supernatant liquid and 5L of dense phase bacterial residue waste liquid, dense phase bacterial residue waste The dry weight of bacteria in the liquid accounts for 45% (w / w), and the amount of protein in the bacteria is obtained by multiplying the quality of organic nitrogen source by 6.25, and the protein amount accounts for 36% (w / w) of the dense phase bacterial residue waste liquid;

[0051] S2. Place the 5L dense phase slag waste liquid obtained in step 1 in the acidolysis reaction kettle, add 6mol / L sulfuric acid through a peristaltic pump at 80ml / min, stir while adding, add the sulfuric acid in the reaction solution to the end The concentration is 2 mol / L, hydrolyzed for 12 hours under normal pressure 110°C, and the detected hydrolysis degree reaches 70%. Then adjust the pH to the end point ...

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Abstract

The invention belongs to the technical field of chemical engineering using non-polymer organic matters as ingredients, and relates to a method for preparing a lactic acid-containing amino acid ammonium salt and polypeptide acid ammonium salt by using lactic acid fermentation thallus residues and lactic acid preparation extraction waste liquid as main raw materials. The method comprises the following steps: preparing amino acid ammonium salt, polypeptide acid ammonium salt and other bacterial residue waste liquid, sodium lactate waste liquid and lactic acid ammonium salt waste liquid; the three kinds of waste liquid are concentrated respectively to obtain acidolysis concentrated liquid, sodium lactate concentrated liquid and ammonium lactate concentrated liquid, the acidolysis concentrated liquid, the sodium lactate concentrated liquid and the ammonium lactate concentrated liquid are mixed according to the weight fraction ratio of 30: 40: 30, organic acid salt environment-friendly snow-melting agent particles mainly containing lactate are obtained through spray drying, the whole process is simple in technology, low in cost and good in economic benefit, secondary waste liquid and waste residues are not generated, and the environment-friendly snow-melting agent is suitable for industrial production. The product can be completely degraded after snow melting, the defects of inorganic salt snow melting agents are well overcome, meanwhile, lactic acid fermentation waste residues and waste liquid are recycled, and the additional value of lactic acid fermentation production is improved.

Description

technical field [0001] The invention relates to the technical field of using non-macromolecule organic matter as ingredients in the chemical industry, in particular to a preparation method of an environment-friendly deicing agent. Background technique [0002] With the continuous expansion and optimization of urban roads, the impact of winter snow on urban road traffic and urban life has become more and more prominent. The use of deicing agents has become one of the effective methods for clearing road snow. At present, deicing agents are mainly divided into two categories. The first type is chlorine salt deicing agent, which mainly consists of one or more of sodium chloride, calcium chloride, magnesium chloride, and potassium chloride (commonly known as deicing salt). This kind of deicing agent has a low freezing point, low price, good snow melting effect and abundant resources, but this kind of deicing agent has a great impact on roads, automobile tires, ecological environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/18
CPCC09K3/185
Inventor 李建委白洁
Owner 潍坊海之源化工有限公司
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