Treatment method of N-p-aminobenzoyl-L-glutamic acid medical intermediate wastewater

A technology for p-aminobenzoyl and wastewater treatment, which is used in neutralization water/sewage treatment, water/sewage treatment, natural water treatment, etc. The effect of bonding and improving the contact area

Inactive Publication Date: 2019-10-15
杭州胜于蓝环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More N-p-aminobenzoyl-L-glutamic acid or folic acid preparation processes in the prior art involve few wastewater treatment methods

Method used

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  • Treatment method of N-p-aminobenzoyl-L-glutamic acid medical intermediate wastewater
  • Treatment method of N-p-aminobenzoyl-L-glutamic acid medical intermediate wastewater
  • Treatment method of N-p-aminobenzoyl-L-glutamic acid medical intermediate wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment 1: a kind of N-p-aminobenzoyl-L-glutamic acid pharmaceutical intermediate waste water treatment method, comprises the following steps: 1: adjust pH: utilize lift pump to pass the former waste water into the waste water pool, multiple batches The raw pharmaceutical wastewater can be accumulated in the wastewater tank and stirred to make multiple batches of raw wastewater evenly mixed; the pH of the raw wastewater is adjusted to 2 with hydrochloric acid to obtain wastewater A.

[0052] Two: Fenton oxidation: Pass waste water A into the Fenton tank, measure the total COD amount in waste water A and the molar mass of ferrous ions, the mass-number ratio of hydrogen peroxide to COD is 1:0.05, and the calculated over Amount of hydrogen peroxide solution. When the molar mass ratio of ferrous ions in wastewater A to hydrogen peroxide is greater than 0.1:1, add aqueous hydrogen peroxide solution to wastewater A to obtain wastewater B and produce organic sediment sludge...

Embodiment 2

[0064] Example 2: A method for treating wastewater of N-p-aminobenzoyl-L-glutamic acid pharmaceutical intermediates. The difference from Example 1 is that in one step, the pH of the raw wastewater is adjusted to 4.5.

[0065] In the second step, an aqueous hydrogen peroxide solution with a mass concentration of 22% is used; the mass-number ratio of hydrogen peroxide to COD is 1:0.2. In addition, when the molar mass ratio of ferrous ions and hydrogen peroxide in wastewater A is less than 0.1:1, water-soluble ferrous salt and hydrogen peroxide aqueous solution are added to obtain wastewater B, and ferrous ions and hydrogen peroxide in wastewater B The molar mass ratio is 0.5:1.

[0066] In the three steps, the pH of the supernatant of waste water B is adjusted to 8 by using an alkali-adjusting agent, and the alkali-adjusting agent adopts 5-25% sodium carbonate solution.

[0067] In the four steps, the second anode plate is a titanium plate coated with 50 μm ruthenium iridium; t...

Embodiment 3

[0068] Example 3: A method for treating wastewater of N-p-aminobenzoyl-L-glutamic acid pharmaceutical intermediates. The difference from Example 1 is that the pH of the raw wastewater is adjusted to 6 in one step.

[0069]In the second step, an aqueous hydrogen peroxide solution with a mass concentration of 30% is used; the mass-number ratio of hydrogen peroxide to COD is 1:0.5. In addition, when the molar mass ratio of ferrous ions and hydrogen peroxide in wastewater A is less than 0.1:1, water-soluble ferrous salt and hydrogen peroxide aqueous solution are added to obtain wastewater B, and ferrous ions and hydrogen peroxide in wastewater B The molar mass ratio is 1:1.

[0070] In the three steps, the pH of the supernatant of waste water B is adjusted to 9 by using an alkali-adjusting agent, and the alkali-adjusting agent adopts 5-25% sodium bicarbonate solution.

[0071] In the four steps, the second anode plate is a titanium plate coated with 100 μm ruthenium iridium; the ...

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Abstract

The invention discloses a treatment method of N-p-aminobenzoyl-L-glutamic acid medical intermediate wastewater, and belongs to the technical field of pharmaceutical wastewater treatment. The treatmentmethod comprises the following steps: 1, adjusting pH: adjusting the pH of raw wastewater to 2-6 to obtain wastewater A; 2, performing Fenton oxidation: adding a mixture of water-soluble ferrous saltand an aqueous hydrogen peroxide solution or the aqueous hydrogen peroxide solution into the wastewater A to obtain wastewater B, performing solid-liquid separation to obtain a supernatant of the wastewater B; 3, performing coagulating sedimentation: adjusting the pH of the wastewater B to 7.5-9, adding a flocculant to obtain a flocculent precipitate and wastewater C; and 4, performing electrocatalytic oxidation: sending the wastewater C to an electrocatalytic oxidation system and discharging water to obtain purified water. By the treatment method, treatment of the wastewater is achieved andthe wastewater is discharged after standards are met.

Description

technical field [0001] The invention relates to the technical field of pharmaceutical wastewater treatment, in particular to a treatment method for N-p-aminobenzoyl-L-glutamic acid pharmaceutical intermediate wastewater. Background technique [0002] Industrial wastewater includes production wastewater, production sewage and cooling water. It refers to wastewater and waste liquid produced in the process of industrial production, which contains industrial production materials, intermediate products, by-products and pollutants produced in the process of production. Many, complex ingredients. [0003] In industrial wastewater, due to the large quantity and variety of chemical raw materials used in the chemical industry, the wastewater discharged during the production process also has the characteristics of large quantity, complex composition and many harmful substances. The pharmaceutical industry in the chemical industry has the characteristics of complex raw material compone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F103/36
CPCC02F1/4672C02F1/52C02F1/66C02F1/722C02F1/725C02F9/00C02F2103/36
Inventor 丁元洪林金华
Owner 杭州胜于蓝环保科技有限公司
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