CN1346789A - Potassium dihydrogen phosphite and its preparing process - Google Patents
Potassium dihydrogen phosphite and its preparing process Download PDFInfo
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- CN1346789A CN1346789A CN 01134148 CN01134148A CN1346789A CN 1346789 A CN1346789 A CN 1346789A CN 01134148 CN01134148 CN 01134148 CN 01134148 A CN01134148 A CN 01134148A CN 1346789 A CN1346789 A CN 1346789A
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- potassium dihydrogen
- dihydrogen phosphite
- reaction
- potassium
- producing
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Abstract
A potassium dihydrogen phosphite (KH2PO3) is prepared from phosphorous acid and potassium carbonate through reaction in the presence of stabilizer. It can be used as fungicide, insecticide, or fertilizer in agriculture and for treating water. Its advantages are simple preparing process, no environmental pollution, and easily available raw materials.
Description
The invention relates to a
No report of potassium dihydrogen phosphite exists in the prior art. The existing fertilizers and bactericides are various, but have certain defects in different degrees.
The invention aims to provide a novel compound potassium dihydrogen phosphite and a production method thereof.
The purpose of the invention is realized as follows:
potassium dihydrogen phosphite, characterized by: the chemical structural formula is as follows:
the physical properties of the above compounds are: is deliquescent, soluble in water and weakly acidic.
A method for producing potassium dihydrogen phosphite is characterized in that: reacting phosphorous acid and potassium carbonate in the presence of a stabilizer to obtain potassium dihydrogen phosphite (KH)2PO3) The reaction formula is as follows:
the reaction temperature is 70-100 ℃. The reaction time is 8-15 hours. The stabilizer is an inert gas or liquid. The inert gas is nitrogen or helium. Inert gasThe liquid is liquid nitrogen. CO produced in the reaction2Introducing into lime water. And (3) concentrating the potassium dihydrogen phosphite solution obtained by the reaction, then carrying out dynamic crystallization in a natural cooling state, then carrying out centrifugal treatment, and taking the precipitate to obtain the potassium dihydrogen phosphite solid. The concentration treatment is carried out at 85-130 ℃.
The product provided by the invention can be used as an important intermediate and a fertilizer of an insecticide and a bactericide on pesticides, can provide phosphorus and potassium necessary for plant growth, can kill fungi of plants, and is non-toxic and residue-free; the water treatment agent can be directly used in an industrial self-circulation water system, has the functions of sterilization and calcium and magnesium ion complexation, can replace an organic phosphine water treatment agent, reduces environmental pollution, and is a high-efficiency green and environment-friendly product. The production method is simple and easy to operate, and raw materials are easy to obtain.
The present invention will be further described with reference to the following examples.
Example 1:
taking potassium carbonate and phosphorous acid solid according to a molar ratio of 1: 1.5-2.5 (examples 1: 1.5, 1: 2, 1: 2.5), respectively dissolving with water, filtering, combining filtrates, reacting, introducing nitrogen as a stabilizer, reacting at 70-100 ℃ (70, 80, 90, 100 ℃) for 8-15 hours (8, 10, 12, 14, 15 hours), and reacting CO generated in the reaction2And (2) introducing lime water for discharging, concentrating the reaction-obtained potassium dihydrogen phosphite solution at 85-130 ℃ (for example 85, 95, 100, 110, 120 and 130 ℃), performing conventional dynamic crystallization, performing centrifugal treatment, and taking precipitate to obtain potassium dihydrogen phosphite solid, wherein the chemical structural formula of the solid is as follows:
example 2:
helium was used as the stabilizer, and the rest was the same as in example 1.
Example 3: the stabilizer used was liquid nitrogen in an amount of 0.1 to 0.5% by weight based on the weight of the phosphorous acid solid, as in example 1.
Claims (10)
1. Potassium dihydrogen phosphite, characterized by: the chemical structural formula is as follows:
2. a production method of potassium dihydrogen phosphite is characterized in that: reacting phosphorous acid and potassium carbonate in the presence of a stabilizer to obtain potassium dihydrogen phosphite, wherein the reaction formula is as follows:
3. the method for producing potassium dihydrogen phosphite as set forth in claim 2, wherein: the reaction temperature is 70-100 ℃.
4. The method for producing potassium dihydrophosphite of claim 2 or 3, wherein: the reaction time is 8-15 hours.
5. The method for producing potassium dihydrophosphite of claim 2, 3 or 4, wherein: the stabilizer is an inert gas or liquid.
6. The method for producing potassium dihydrogen phosphite as set forth in claim 5, wherein: the inert gas is nitrogen or helium.
7. The method for producing potassium dihydrogen phosphite as set forth in claim 5, wherein: the inert liquid is liquid nitrogen.
8. The method for producing potassium dihydrophosphite of claim 2, 3 or 4, wherein: CO produced in the reaction2Introducing into lime water.
9. The method for producing potassium dihydrophosphite of claim 2, 3 or 4, wherein: and (3) concentrating the potassium dihydrogen phosphite solution obtained by the reaction, then carrying out dynamic crystallization, then carrying out centrifugal treatment, and taking the precipitate to obtain the potassium dihydrogen phosphite solid.
10. The method for producing potassium dihydrogen phosphite as set forth in claim 7, wherein: the concentration treatment is carried out at 85-130 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011341483A CN1142090C (en) | 2001-11-04 | 2001-11-04 | Potassium dihydrogen phosphite and its preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011341483A CN1142090C (en) | 2001-11-04 | 2001-11-04 | Potassium dihydrogen phosphite and its preparing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1346789A true CN1346789A (en) | 2002-05-01 |
| CN1142090C CN1142090C (en) | 2004-03-17 |
Family
ID=4672280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011341483A Expired - Lifetime CN1142090C (en) | 2001-11-04 | 2001-11-04 | Potassium dihydrogen phosphite and its preparing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1142090C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553723A (en) * | 2013-11-08 | 2014-02-05 | 翁莹冰 | Solid-phase synthesis method of phosphate-phosphite compound fertilizers |
| CN106672929A (en) * | 2017-01-17 | 2017-05-17 | 成都乐氏化工工程有限公司 | Method for preparing potassium dihydrogen phosphite |
| CN109673668A (en) * | 2019-02-22 | 2019-04-26 | 铜仁学院 | A kind of drought-resistant medicament for promoting rape seed to sprout emergence |
| CN117069079A (en) * | 2023-08-05 | 2023-11-17 | 如东振丰奕洋化工有限公司 | Preparation process and application of potassium dihydrogen phosphite |
-
2001
- 2001-11-04 CN CNB011341483A patent/CN1142090C/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553723A (en) * | 2013-11-08 | 2014-02-05 | 翁莹冰 | Solid-phase synthesis method of phosphate-phosphite compound fertilizers |
| CN103553723B (en) * | 2013-11-08 | 2015-03-04 | 翁莹冰 | Solid-phase synthesis method of phosphate-phosphite compound fertilizers |
| CN106672929A (en) * | 2017-01-17 | 2017-05-17 | 成都乐氏化工工程有限公司 | Method for preparing potassium dihydrogen phosphite |
| CN109673668A (en) * | 2019-02-22 | 2019-04-26 | 铜仁学院 | A kind of drought-resistant medicament for promoting rape seed to sprout emergence |
| CN117069079A (en) * | 2023-08-05 | 2023-11-17 | 如东振丰奕洋化工有限公司 | Preparation process and application of potassium dihydrogen phosphite |
| CN117069079B (en) * | 2023-08-05 | 2024-02-20 | 如东振丰奕洋化工有限公司 | Preparation process and application of potassium dihydrogen phosphite |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1142090C (en) | 2004-03-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Rudong Zhenfeng Yiyang Chemical Co. Ltd. Assignor: Zhao Jinhua Contract fulfillment period: 2008.8.15 to 2013.8.15 Contract record no.: 2008320000875 Denomination of invention: Potassium dihydrogen phosphite and its preparing process Granted publication date: 20040317 License type: Exclusive license Record date: 20081013 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.8.15 TO 2013.8.15; CHANGE OF CONTRACT Name of requester: RUDONG ZHENFENGYIYANG CHEMICAL ENGINEERING CO., LT Effective date: 20081013 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20170531 Address after: 226400 the Yellow Sea chemical industry zone, Nantong Economic Development Zone, Rudong County, Jiangsu Patentee after: Rudong Zhenfeng Yiyang Chemical Co. Ltd. Address before: 226408, Feng County, Jiangsu County, Rudong Province Patentee before: Zhao Jinhua |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20040317 |