CN1186306C - Method for producing potassium formate - Google Patents
Method for producing potassium formate Download PDFInfo
- Publication number
- CN1186306C CN1186306C CNB021101752A CN02110175A CN1186306C CN 1186306 C CN1186306 C CN 1186306C CN B021101752 A CNB021101752 A CN B021101752A CN 02110175 A CN02110175 A CN 02110175A CN 1186306 C CN1186306 C CN 1186306C
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- potassium
- potassium formate
- formic acid
- reactor
- formate
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Abstract
The present invention discloses a method for producing potassium formate. Formic acid directly reacts with potassium hydroxide or potassium carbonate to prepare the potassium formate under certain conditions, and in a technical process, the formic acid and the potassium hydroxide or the potassium carbonate are added in a reactor and are stirred. The reaction temperature is controlled, and the potassium formate can be prepared. The prepared potassium formate is conveyed to an evaporator to evaporate water generated in reactions in the potassium formate, and the potassium formate is in a melted shape and is prepared into finished products for users to use. Therefore, the method has the characteristics of simple technology, easy operation, standardized modeling production, low cost, no discharge of waste liquid, waste gas and waste solid, etc.
Description
One, the technical field
The invention relates to a method for producing a novel fine chemical material potassium formate.
Second, background Art
The potassium formate is a downstream product of formic acid, is mainly used as an additive in drilling fluid for petroleum exploitation, can realize high density and keep low viscosity by adding the potassium formate in the drilling fluid, and has the effects of preventing blowout, improving drilling speed and prolonging the service life of a drill bit. The mining cost is reduced. The antifreezing agent can also be widely used for highway construction, particularly highway construction, and has good antifreezing effect as an antifreezing agent in winter construction; it can also be used in airport, etc. to replace sodium chloride, and has snow melting effect in snow without environmental pollution.
At present, because the manufacturing process is complex, the production cost is high, the technical difficulty is high, no potassium formate product is produced in China, only a few countries produce in foreign countries, and potassium formate used in China is imported completely.
Third, the invention
The invention aims to provide a method for producing potassium formate, which has the advantages of simple process, easy operation, realization of large-scale production, low productioncost and no three-waste discharge.
The technical scheme adopted by the invention is as follows: the formic acid reacts with potassium hydroxide/or potassium carbonate under certain conditions to prepare the potassium formate. The reaction equation is as follows:
or:
the process flow comprises the following steps: firstly, adding metered formic acid and potassium hydroxide/or potassium carbonate into a reactor, starting a cooling water system of the reactor, and setting the weight ratio of the formic acid to the potassium hydroxide/or potassium carbonate as the molecular weight ratio. Starting a stirring device of the reactor to stir, controlling the reaction temperature in the reactor to be 90-104 ℃ when formic acid and potassium hydroxide are used for reacting to prepare potassium formate, controlling the reaction temperature in the reactor to be 40-60 ℃ when formic acid and potassium carbonate are used for reacting to prepare potassium formate, sending the potassium formate into an evaporator after the reaction is finished to prepare the potassium formate, controlling the temperature in the evaporator to be 180-210 ℃ to evaporate water generated by the reaction in the potassium formate, and enabling the potassium formate to be in a molten state, so that a potassium formate finished product can be prepared for users to use.
The invention prepares the potassium formate by directly reacting the formic acid and the potassium hydroxide/or the potassium carbonate under certain conditions, thereby having the characteristics of simple process, easy operation, realization of large-scale production, low production cost, no three-waste discharge and the like.
Fourth, detailed description of the invention
Example 1: in this example, formic acid and potassium hydroxide are used as raw materials, solid flake potassium hydroxide is added into a reactor from a feed inlet of the reactor, a cooling water circulation system of the reactor is started to control the temperature of the reaction in the reactor, and then metered formic acid is added into the reactor from the top of the reactor, wherein the addition amount of formic acid and potassium hydroxide is the ratio of the molecular weight of formic acid to potassium hydroxide. Such as: the molecular weight ratio of formic acid to potassium hydroxide is 46: 56, the content of formic acid is 85%, the content of potassium hydroxide is 94%, the adding amount of formic acid and potassium hydroxide is 1: 1.1, namely, 1.1 ton of potassium hydroxide with the content of 94 percent is added into a reactor, 1 ton of formic acid with the content of 85 percent is added according to the proportion, after the formic acid is added, starting a stirrer of the reactor, adjusting the flow of cooling water, controlling a reaction thermometer in the reactor to be 100 +/-2 ℃, opening a pressure control valve of the reactor to ensure that the reaction pressure in the reactor is normal pressure, and after the reaction is finished and all the potassium formate is prepared, feeding the potassium formate and the water generated by the reaction into an evaporator, gradually increasing the temperature in the evaporator to 190-200 ℃, evaporating water generated by the reaction to make the potassium formate in a molten state, and feeding the potassium formate into a tabletting machine to prepare solid flaky potassium formate for users to use.
Example 2: in this example, formic acid and potassium carbonate are used as main raw materials to prepare potassium formate, the process flow is basically the same as that of example 1, since the molecular weight ratio of formic acid to potassium carbonate is 92: 138; the content of the used formic acid is 85 percent, and the adding amount is 1 ton; the content of potassium carbonate is 98 percent, and the adding amount is 1.3 percent; adding potassium carbonate into a reactor from a feed inlet of the reactor, starting a cooling water circulation system, adding formic acid into the reactor from the top of the reactor, starting a stirrer, adjusting the flow of cooling water, controlling the reaction temperature in the reactor to be 50 +/-2 ℃, opening a pressure control valve of the reactor to enable the pressure in the reactor to be normal pressure, after the reaction is finished to prepare potassium formate, feeding the potassium formate into an evaporator, heating the temperature in the evaporator to 190 plus or minus 200 ℃, evaporating water generated by the reaction, enabling the potassium formate to be in a molten state, and feeding the potassium formate into a sheet making machine to prepare solid sheets for users.
Claims (3)
1. A method for producing potassium formate is characterized in that formic acid reacts with potassium hydroxide/or potassium carbonate under certain conditions to prepare potassium formate, and the technological process comprises the following steps: adding measured formic acid and potassium hydroxide/or potassium carbonate into a reactor, wherein the weight ratio of the formic acid to the potassium hydroxide/or the potassium carbonate is the molecular weight ratio of the formic acid to the potassium hydroxide/the potassium carbonate, starting a cooling water system of the reactor, starting a stirring device of the reactor, controlling the reaction temperature in the reactor, after the reaction is finished to prepare potassium formate, feeding the potassium formate into an evaporator, controlling the temperature in the evaporator to be 180-210 ℃, evaporating water generated in the reaction in the potassium formate, and enabling the potassium formate to be in a molten state, thus preparing a finished product of the potassium formate.
2. The method for producing potassium formate according to claim 1, wherein the reaction temperature in the reactor is controlled to 90 to 104 ℃ when the potassium formate is produced by reacting formic acid with potassium hydroxide.
3. The method for producing potassium formate according to claim 1, wherein the reaction temperature in the reactor is controlled to 40 to 60 ℃ when the potassium formate is produced by reacting formic acid with potassium carbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021101752A CN1186306C (en) | 2002-03-13 | 2002-03-13 | Method for producing potassium formate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021101752A CN1186306C (en) | 2002-03-13 | 2002-03-13 | Method for producing potassium formate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1443746A CN1443746A (en) | 2003-09-24 |
| CN1186306C true CN1186306C (en) | 2005-01-26 |
Family
ID=27811141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021101752A Expired - Fee Related CN1186306C (en) | 2002-03-13 | 2002-03-13 | Method for producing potassium formate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1186306C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE530897C2 (en) * | 2007-01-24 | 2008-10-14 | Perstorp Specialty Chem Ab | Process for the preparation of potassium formate and potassium formate prepared according to the process |
| CN104418722A (en) * | 2013-09-03 | 2015-03-18 | 曾舟华 | Technique for concentrating diluted formic acid and co-generating monopotassium phosphate |
| CN107778164A (en) * | 2016-08-30 | 2018-03-09 | 思科福（北京）生物科技有限公司 | A kind of preparation method of potassium diformate |
-
2002
- 2002-03-13 CN CNB021101752A patent/CN1186306C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1443746A (en) | 2003-09-24 |
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| SE01 | Entry into force of request for substantive examination | ||
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050126 Termination date: 20110313 |