CN1295142C - Process for producing chlorine dioxide by carbon dioxide and sodium chlorite - Google Patents

Process for producing chlorine dioxide by carbon dioxide and sodium chlorite Download PDF

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Publication number
CN1295142C
CN1295142C CNB2003101244607A CN200310124460A CN1295142C CN 1295142 C CN1295142 C CN 1295142C CN B2003101244607 A CNB2003101244607 A CN B2003101244607A CN 200310124460 A CN200310124460 A CN 200310124460A CN 1295142 C CN1295142 C CN 1295142C
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Prior art keywords
chlorine dioxide
carbon dioxide
sodium chlorite
present
dioxide gas
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Expired - Fee Related
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CNB2003101244607A
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CN1629066A (en
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聂忠仁
曾宇平
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Shenzhen Juyuan Science & Technology Co Ltd
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Shenzhen Juyuan Science & Technology Co Ltd
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Abstract

The present invention provides a technological process using carbon dioxide and sodium chlorite for producing chlorine dioxide. The present invention is characterized in that carbon dioxide gas causing greenhouse effect and pollution air reacts with sodium chlorite solution of a certain concentration when a catalyst exists, and pure chlorine dioxide as a disinfectant with high oxidizing properties and high disinfecting capacity is produced. The technology provided by the present invention aims to generate the high-purity chlorine dioxide, which is favorable for the application of the chlorine dioxide in tap water, and trichloromethane which is the carcinogenic substance for the human body can not be generated; meanwhile, the present invention is favorable for decelerating the greenhouse effect and reducing the environmental pollution of the carbon dioxide gas and provides a feasible scheme for the comprehensive utilization of the carbon dioxide.

Description

Method for producing chlorine dioxide by using carbon dioxide and sodium chlorite
Technical Field
The invention relates to a method for producing dichloro by using carbon dioxide and sodium chlorite as raw materials. The patent classification number is 02F 1/76.
Background
In the process of producing and living materials, people inevitably produce a large amount of carbon dioxide gas, most of which is accumulated on the surface of the earth except for a part of the carbon dioxide gas used for photosynthesis of plants and industrial and civil foods, so that the climate is warmed, and the greenhouse effect is formed. This fact forces people to consider how to fully utilize the carbon dioxide gas in a large amount to reduce the pollution of the carbon dioxide gas to the surrounding air as much as possible. In addition, scientists have found that in the process of cleaning drinking water, chlorine reacts with trace organic substances such as humic acid and the like remained in the drinking water to generate Trihalomethanes (THM)3) Carcinogenic substances. Scientists find that the chlorine dioxide is used to replace liquid chlorine to clean and disinfect drinking water, so that Trihalomethanes (THM) can not be generated3) Carcinogenic substances. Thus, since 1944, a water plant in the large waterfall area of nicandra in the united states first successfully used chlorine dioxide instead of liquid chlorine to sanitize drinking water. Chlorine dioxide has been commonly used in europe since the seventies to sanitize drinking water. Therefore, chlorine dioxide gas is produced from inexpensive carbon dioxide and sodium chlorite as raw materials for tap water,The cleaning and disinfection of drinking water is necessary and significant, and the technology provided by the invention provides the method.
Disclosure of Invention
The technical scheme adopted by the invention for solving the technical problems in the prior art is to provide a process method for producing chlorine dioxide by adopting carbon dioxide and sodium chlorite, which is characterized in that the carbon dioxide is introduced into a sodium chlorite aqueous solution with the mass percentage concentration of 15-40% under the condition of taking dipropyl alcohol as a catalyst, chlorine dioxide gas is generated through reaction, and then the chlorine dioxide gas is prepared into stable chlorine dioxide solution.
The technology provided by the invention aims to generate high-purity chlorine dioxide, and is beneficial to the application of the chlorine dioxide in tap water without generating substances causing cancer to human bodies by trichloromethane; simultaneously, the method is favorable for slowing down the greenhouse effect and reducing the pollution of carbon dioxide gas to the surrounding environment, and provides a feasible scheme for comprehensively utilizing the carbon dioxide.
Detailed Description
Example i: taking an aqueous sodium chlorite solution as an example, the reaction with carbon dioxide gas is as follows:
the preparation process is carried out at a capacity of 0.5M3The reaction is carried out in an enamel reactor, the water quantity is 375Kg, and sodium chlorite is dissolved in water to ensure that the concentration is 15-40%. Adding dipropyl alcohol or soluble cobalt salt to make its actual concentration in water medium be 0.01-5% (mass percentage). Starting a stirrer to completely dissolve the sodium chlorite and the catalyst, and then introducing carbon dioxide gas into the sodium chloriteIn the aqueous solution, the chlorine dioxide gas with yellow-green color is generated. Meanwhile, fresh air (used for diluting chlorine dioxide gas) is introduced to bring out the chlorine dioxide gas, the chlorine dioxide gas is directly introduced into the non-sterilized drinking water through a chlorine dioxide detector, and the concentration of the chlorine dioxide in the drinking water is 0.01-1.00ppm according to the water quality condition, so that bacteria and coliform bacteria in the drinking water can be killed, and the drinking water reaches the sanitary standard of national drinking water. The concentration of chlorine dioxide entering the water can be determined by controlling the amount of carbon dioxide gas.
Example 2: the process and apparatus of example 1 can be used for cleaning and disinfecting the surfaces of fermentation tanks, storage tanks, beer bottles, equipment and pipelines in the beer industry. The method is that chlorine dioxide gas generated in the embodiment 1 is introduced and dissolved in pure water (tap water may contain trace heavy metal ions, when chlorine dioxide gas is introduced, metal oxide or hydroxide precipitation which is difficult to dissolve in water is generated, but pure water does not have the phenomenon), so that the concentration of chlorine dioxide in pure water reaches 100-250ppm, and the objects can be completely sterilized and disinfected.
Example 3: the hospital waste water not only contains a large amount of various microorganisms, germs and viruses causing diseases of people, but also has high Chemical Oxygen Demand (COD), chlorine dioxide generated by the process and the device in the embodiment 1 is directly introduced into a waste water pool of the hospital, and the concentration of the chlorine dioxide in the waste water is 20-100ppm, so that various pathogenic microorganisms can be killed, the chemical oxygen demand can be reduced, and the national hospital waste water discharge standard can be reached.
Example 4: when the sodium chlorite feed in example 1 was consumed, it had been completely converted to sodium carbonate and sodium chloride. The sodium carbonate in the residual liquid is a stabilizer for preparing the stable chlorine dioxide product, so that the residual liquid can be used for absorbing chlorine dioxide gas after being added with other peroxide stabilizers to prepare the commodity stable chlorine dioxide product for sale.
The noun explains:
1. chlorine dioxide, a yellow-green gas, is extremely reactive in chemical properties. Is unstable, is easily decomposed in air, has a limited shelf life after being dissolved in water, and must be used as it is or fails.
2. The stable chlorine dioxide is prepared by dissolving chlorine dioxide gas in water containing peroxide to obtain water solution with chlorine dioxide content of 2-5%, and its storage life is 2 years.

Claims (1)

1. A process for producing chlorine dioxide by using carbon dioxide and sodium chlorite is characterized in that the carbon dioxide is introduced into a sodium chlorite aqueous solution with the mass percentage concentration of 15-40% under the condition that dipropyl alcohol is used as a catalyst, chlorine dioxide gas is generated through reaction, and then the chlorine dioxide gas is prepared into stable chlorine dioxide solution.
CNB2003101244607A 2003-12-15 2003-12-15 Process for producing chlorine dioxide by carbon dioxide and sodium chlorite Expired - Fee Related CN1295142C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2003101244607A CN1295142C (en) 2003-12-15 2003-12-15 Process for producing chlorine dioxide by carbon dioxide and sodium chlorite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2003101244607A CN1295142C (en) 2003-12-15 2003-12-15 Process for producing chlorine dioxide by carbon dioxide and sodium chlorite

Publications (2)

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CN1629066A CN1629066A (en) 2005-06-22
CN1295142C true CN1295142C (en) 2007-01-17

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106006561B (en) * 2016-05-30 2019-01-11 山西大学 A kind of preparation method of chlorine dioxide
JP7401103B2 (en) * 2018-10-29 2023-12-19 大幸薬品株式会社 Chlorine dioxide generator
CN110577192B (en) * 2019-10-25 2021-07-13 东北大学秦皇岛分校 Preparation device and method of high-purity chlorine dioxide solution

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1048682A (en) * 1989-07-11 1991-01-23 栾和林 Process for preparing concentrated aqueous solution of chlorine dioxide
US20030003015A1 (en) * 2001-03-23 2003-01-02 Roensch L. Fred Method for generating chlorine dioxide

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1048682A (en) * 1989-07-11 1991-01-23 栾和林 Process for preparing concentrated aqueous solution of chlorine dioxide
US20030003015A1 (en) * 2001-03-23 2003-01-02 Roensch L. Fred Method for generating chlorine dioxide

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