CN1050338C - Process for producing stable chlorine dioxide - Google Patents
Process for producing stable chlorine dioxide Download PDFInfo
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- CN1050338C CN1050338C CN94119720A CN94119720A CN1050338C CN 1050338 C CN1050338 C CN 1050338C CN 94119720 A CN94119720 A CN 94119720A CN 94119720 A CN94119720 A CN 94119720A CN 1050338 C CN1050338 C CN 1050338C
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- Prior art keywords
- chlorine dioxide
- stable chlorine
- producing stable
- solution
- dioxide
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Abstract
The present invention relates to a method for producing stable chlorine dioxide. Potassium chlorate, oxalic acid and sulphuric acid are used as raw materials, reactants carry out reaction below 20 DEG C to 80 DEG C in negative pressure after being uniformly mixed, and generated chlorine dioxide gas is absorbed by a sodium percarbonate solution so that a stable chlorine dioxide solution is made. The method for producing stable chlorine dioxide has the advantages of simple equipment, low cost, easy reaction operation, high conversion rate, fewer byproducts and high safety and reliability.
Description
The present invention relates to a kind of production method of chlorine oxides, specifically is about produce the method for dioxide peroxide and then production stability dioxide peroxide with the metal-salt of chloric acid.
Stability chlorine dioxide is an optimal disinfection sanitizer in the chemostefilant that uses at present, abroad be referred to as the 4th generation sterilizing agent.It has the sterilization wide spectrum, effective concentration is low, speed of action is fast, colourless, odorless, advantage such as nontoxic, safe in utilization, extensively uses as disinfection sanitizer, deodorization mould inhibitor, food preservative, water quality cleansing agent.The production method of dioxide peroxide has kind more than ten at present.Ma Dixun the earliest (Mathieson) method is to produce chlorine dioxide with the sulphur dioxide reduction sodium chlorate.Thereafter to have risen a series of be raw material with the sodium chlorate in development, makes the chlorine dioxide production method of reductive agent such as R1 method, R2 method, R3 method, R4 method with sulfurous gas, hydrochloric acid, sodium-chlor and sulfuric acid etc. respectively ... R7 method, R8 method or the like.Wherein the main reaction of R8 method is as follows:
The technological operation of R8 method is fairly simple, production efficiency is high, is used widely abroad at present.But the weak point of aforesaid method is a reaction needed carries out under the high negative condition, and therefore very high to the conversion unit requirement, equipment is very complicated, investment is huge.And the processing of a large amount of inorganic salt that produce in the reaction process is also very complicated.
In recent years going up marine technological applications portion utilizes the acidified effect of chlorite that highly purified chlorine dioxide takes place to succeed.This technological equipment investment is little, production is simple, easy control of reaction system, and dioxide peroxide transformation efficiency height absorbs fully.But, make that this technology cost is very high because the chloritic price of raw material is higher and be not easy to obtain.On the other hand, because stable ClO 2 solution comes down to exist with the chlorite form of dioxide peroxide, this is that the raw material production dioxide peroxide changes chloritic circulating reaction technology again into the chlorite, is not-so-practical from economic angle.
The objective of the invention is to provide a kind of stability chlorine dioxide production method, the raw materials cost of this working system is low, obtains easily; Operation is convenient, device structure simple and investment seldom.
The production of stability chlorine dioxide comprises two operations: chlorine dioxide generation operation and dioxide peroxide stabilization operation.
In the generation operation of chlorine dioxide reaction be metal-salt, oxalic acid and sulfuric acid with chloric acid as raw material, be blended in and carry out under 20--80 ℃ and the condition of negative pressure.Wherein the metal-salt of chloric acid can be Potcrate, sodium chlorate or calcium chlorate etc., is especially again best with Potcrate.
Reaction formula when adopting Potcrate as raw material is:
In the above-mentioned reaction, the amount ratio of Potcrate and oxalic acid is KCLO
3: (COOH)
2=1: 0.5-1, adding vitriolic concentration is 30-50, reaction pressure remains on 0.8 * 10
5-1.0 * 10
5Pascal.
The by product KHSO of reaction
4Mother liquor can recycle, and reduces the vitriolic consumption, and can reclaim dissolved chlorine dioxide in the mother liquor, reduces three-waste pollution.
The stablizer that adopts in the dioxide peroxide stabilization operation is the aqueous solution of superoxide, such as alkali metal peroxides such as SPC-D, Sodium peroxoborate, also can be with alkalimetal oxide and the existing preparation of hydrogen peroxide.The advantage of a kind of method in back is that cost is low, the active chlorine content height of superoxide, effective, the stabilization efficient height of peroxidation.
Chlorine dioxide constantly is passed in the stablizer aqueous solution, and decompression at room temperature absorbs, and passes through sedimentation again, can obtain stable ClO 2 solution after the filtration.
Consider that dioxide peroxide has certain corrosive nature to carbon steel and to aluminium, stainless mild oxidation effect, conversion unit of the present invention all adopts plastics.
Process for producing stable chlorine dioxide provided by the present invention is compared with background technology, has the following advantages:
1, technological process is simple, facility investment is few.Replace external titanium alloys reactor with plastics system reactor among the present invention, cost reduces greatly, and functional.
2, adopt raw material to be common industrial chemicals, obtain easily, cheap.
3, be reflected under the negative pressure and carry out, the blast that can avoid dioxide peroxide to leak.
4, the carbonic acid gas that produces in the reaction process can play diluted chlorine dioxide, make the effect of its concentration at the explosive range lower limit.
5, the byproduct of reaction Recycling Mother Solution is used, and chlorine dioxide is fully absorbed, and emission gases is a carbonic acid gas, environmentally safe.
A specific embodiment of the present invention below is provided:
Get 1 part in Potcrate, 0.75 part of oxalic acid, join after mixing in the plastic chlorine dioxide generator, gradation at room temperature adds the sulfuric acid of 50% concentration, improves temperature of reaction to 80 ℃ gradually, and the control generator top hole pressure is 0.9 * 10
5Pascal constantly is passed into the chlorine dioxide that produces with Na
2CO
3/ H
2O
2In the solution of the stablizer of forming, absorb and obtain chlorine dioxide concentration 20000ppm, with absorption liquid sedimentation 48 hours, remove floss after, obtain transparent stable ClO 2 solution then.
Claims (2)
1, a kind of production method of stability chlorine dioxide, comprise with Potcrate, oxalic acid and sulfuric acid and be the raw material production chlorine dioxide and chlorine dioxide become two steps of stable ClO 2 solution by the SPC-D solution absorption, it is characterized in that: with Potcrate and oxalic acid by 1: after the amount ratio of 0.5-1 mixes, gradation adds sulfuric acid, in 20--80 ℃ of temperature and 0.8 * 10
5-1.0 * 10
5Produce chlorine dioxide under pascal's the negative pressure.
2, production method according to claim 1 is characterized in that used sulfuric acid concentration is 30-50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94119720A CN1050338C (en) | 1994-12-16 | 1994-12-16 | Process for producing stable chlorine dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94119720A CN1050338C (en) | 1994-12-16 | 1994-12-16 | Process for producing stable chlorine dioxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1107438A CN1107438A (en) | 1995-08-30 |
| CN1050338C true CN1050338C (en) | 2000-03-15 |
Family
ID=5039356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94119720A Expired - Fee Related CN1050338C (en) | 1994-12-16 | 1994-12-16 | Process for producing stable chlorine dioxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1050338C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052957C (en) * | 1996-12-18 | 2000-05-31 | 丁章迅 | Method for production of stable chlorine dioxide |
| US20040175322A1 (en) * | 2003-03-03 | 2004-09-09 | Woodruff Thomas E. | Process for producing chlorine dioxide |
| CN103459306B (en) * | 2011-03-22 | 2016-02-10 | 萨布尔知识产权控股有限责任公司 | chlorine dioxide precursor and using method thereof |
| US10442711B2 (en) | 2013-03-15 | 2019-10-15 | Sabre Intellectual Property Holdings Llc | Method and system for the treatment of produced water and fluids with chlorine dioxide for reuse |
| US9238587B2 (en) | 2013-03-15 | 2016-01-19 | Sabre Intellectual Property Holdings Llc | Method and system for the treatment of water and fluids with chlorine dioxide |
| CN110200011A (en) * | 2019-07-05 | 2019-09-06 | 四川齐力绿源水处理科技有限公司 | A kind of preparation method of composite chlorine dioxide |
| CN113207904A (en) * | 2021-04-30 | 2021-08-06 | 深圳市安保医疗感控科技股份有限公司 | Chlorine dioxide slow-release material, manufacturing method of related fabric and foot product |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075298A (en) * | 1992-02-13 | 1993-08-18 | 青岛海洋大学 | A kind of method of producing chlorine dioxide of high concentration and stable state |
-
1994
- 1994-12-16 CN CN94119720A patent/CN1050338C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075298A (en) * | 1992-02-13 | 1993-08-18 | 青岛海洋大学 | A kind of method of producing chlorine dioxide of high concentration and stable state |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1107438A (en) | 1995-08-30 |
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