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Method for wastewater treatment and circulation recover zero discharge in lipoic acid preparation

A recycling and wastewater treatment technology, applied in water/sewage treatment, natural water treatment, multi-stage water/sewage treatment, etc., can solve the problems of increased treatment costs, waste of water resources, high treatment costs, etc., to reduce concentration Quantity of purification treatment, zero discharge of water resources, and the effect of reducing external discharge

Active Publication Date: 2009-12-16
SUZHOU FUSHILAI PHARMA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The obvious problems have the following aspects: First, because there are many process links in the preparation of lipoic acid, the number of water flushing pumps used for vacuuming reaches dozens, and this water is directly discharged into the sump for treatment. It will increase the treatment cost, and also cause a large amount of waste of water resources; secondly, the cooling water used for jacket cooling of the reactors in each process is directly discharged into the sump. Since the cooling water does not belong to the category of waste water, it is They are discharged into the sump together, which not only wastes water resources more seriously, but also increases the treatment cost involuntarily; in addition, the organic wastewater from each process section is directly collected into the sump for treatment, because this wastewater contains a large amount of Recyclable organic matter, which not only causes waste of materials and increases production costs, but also high-concentration organic wastewater with a CODcr of 50,000 to 200,000 mg / L, which is difficult and expensive to treat
Even if the above three kinds of water are collected into the sump for centralized treatment according to conventional treatment methods, it is still difficult to meet the requirements of CODcr less than 80mg / L and total CODcr control, unless it costs several times the cost of conventional treatment. However, it costs Handling huge sums of money will make the survival of enterprises unsustainable

Method used

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  • Method for wastewater treatment and circulation recover zero discharge in lipoic acid preparation
  • Method for wastewater treatment and circulation recover zero discharge in lipoic acid preparation
  • Method for wastewater treatment and circulation recover zero discharge in lipoic acid preparation

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Effect test

Embodiment 1

[0023] please see figure 1 , the applicant combined this figure to explain the principle of clear and turbid flow of circulating water in water flushing pumps, as known in the industry, in various process steps of lipoic acid production, such as esterification, acylation, addition, reduction and chlorination, etc. are equipped with figure 1 The corresponding water flushing pump 2 shown is used to evacuate the corresponding reactor 1 . The principle of vacuumizing the reaction kettle 1 in the above-mentioned processes is the same, so the applicant only uses the water flushing pump 2 of the vacuumizing of the reaction kettle 1 in the esterification process in the present embodiment. The reuse of circulating water will be explained. Based on the principle of inferring other cases from one instance or referring to analogy by analogy, the applicant does not repeat the description of the recycling of the water flushing pump circulating water in the process links such as esterifica...

Embodiment 2

[0027] please see figure 2 , the applicant combined this figure to explain the principle of turbidity separation of circulating cooling water, still aiming at the esterification reaction. During the esterification reaction process of the reactor 1, the jacket cooling of the reactor 1 is required, so a centralized cooling water pool 12 is built in the production area or the factory area, and the water is introduced into the cooling water outlet 13 of the jacket of the reactor 1. Cool in the cooling water pool 12, and introduce the cooling water inlet 16 of the jacket of the reactor 1 by the third circulation pump 14 through the fourth introduction pipe 15, forming a cooling water circulation loop. The above-mentioned cooling water circulation loop shows natural cooling, that is, it is naturally cooled to normal temperature in the cooling water pool 12, but when the summer temperature is high, the cooling tower 17 can be activated, so a cooling tower is provided on the pipeline...

Embodiment 3

[0030] please see image 3 , the applicant combined this figure to explain the principle of recycling water containing the same organic material in the same process link, and continued to take the esterification reaction as an example. The water for feeding that is drawn from the water storage tank water outlet 22 of the water storage tank 23 is introduced into the reactor 1 from the feed water outlet 18 of the reactor 1 through the fourth circulation pump 21 on the pipeline of the fifth guide pipe 19, and is then connected to the outlet of the reactor. The sixth guide pipe 26 on the water port is introduced into the process water pool 27, and then the water in the process water pool 27 is introduced into the water storage tank 23 through the water storage tank inlet 20 of the water storage tank 23 by the fifth circulation pump 25 through the seventh guide pipe 24 , forming a water circulation loop, that is, forming the same process for recycling. Since the water drawn from t...

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Abstract

The invention relates to a method of wastewater treatment and circulation cycling zero draining in the protogen preparation, which belongs to the technical field of medical and chemical wastewater treatment and resource recycle. Water hammer pump circulation water and circulation cooling water as well as organic process wastewater perform the useful and waste distributary which causes the water hammer pump circulation water to be led in a water hammer pump circulation water treatment pool for the circulation and the recycle of a water hammer pump after singly being treated. The cooling water is led into a cooling water pool for the recycle of cooling a jacket after being singly treated. Water containing the organic material in the same process procedure is led into a process water collecting pool to be used as feeding water for the recycle of the same process. Water in the water hammer pump circulation water treatment pool, water in the cooling water pool, and water in the process water collecting pool are led out for the centralized processing, the treated water after the centralized processing is led back to the water hammer pump circulation water treatment pool, the cooling water pool, and the process water collecting pool. The method has the advantages that the outside discharge of the contaminant is reduced from the production process, the production raw material cost is favorable to be saved, and the zero draining is realized and the water resource is saved.

Description

technology field, [0001] The invention belongs to the technical field of pharmaceutical and chemical wastewater treatment and resource reuse, and specifically relates to a zero-emission method for wastewater treatment and recycling in the preparation of lipoic acid Background technique [0002] Due to its strong biological activity, α-lipoic acid is one of the anti-aging agents and antioxidants with the same reputation as ginseng, ginkgo, vitamin E, vitamin C and vitamin B. At present, the preparation process of α-lipoic acid is as follows: adipic acid is esterified, acylated, added, reduced, and chlorinated to produce an intermediate - 6,8 dichlorooctanoic acid ethyl ester, and then undergoes cyclization and hydrolysis. , to obtain the finished lipoic acid. Lipoic acid is also known as dilipoic acid, and its English chemical name is: α-lipoicacid thioctic acid or1, 2-dicthio-lane-3-valerleacid. The Chinese name is: 5-(1,2-dithianolyl)pentanoic acid, referred to as ALA, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/40C02F1/461C02F1/52C02F3/30C02F103/36
Inventor 陈惠国王建刚
Owner SUZHOU FUSHILAI PHARMA CO LTD
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