CN1651373A - Production technology of tetramethylol methane by using ealcium method - Google Patents
Production technology of tetramethylol methane by using ealcium method Download PDFInfo
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- CN1651373A CN1651373A CN 200410060307 CN200410060307A CN1651373A CN 1651373 A CN1651373 A CN 1651373A CN 200410060307 CN200410060307 CN 200410060307 CN 200410060307 A CN200410060307 A CN 200410060307A CN 1651373 A CN1651373 A CN 1651373A
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- acetaldehyde
- formaldehyde
- ealcium
- calcium
- production technology
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Abstract
A process for preparing pentacrythritol from formaldehyde, acetaldehyde and calcium hydroxy by calcium method includes such steps as condensating reacting, dealdehydizing reacting, evaporating, crystallizing, centrifugal separating and drying. Its advantages are high quality and output rate and no pollution.
Description
One, technical field: the present invention relates to a kind of Chemicals and technology, especially the calcium method is produced tetramethylolmethane technology.
Two, background technology: at present, domestic production route all adopts formaldehyde and acetaldehyde to make catalyst reaction system tetramethylolmethane at sodium hydroxide, and external most this method that adopts, and this kind production technique is only produced the product of 86---90% content.
Three, summary of the invention: the purpose of this invention is to provide the calcium method and produce tetramethylolmethane technology, it has overcome other and has produced the shortcoming of tetramethylolmethane technology, the object of the present invention is achieved like this, it is to be made by formaldehyde, acetaldehyde, calcium hydroxide, and its proportioning ratio is: 4.5---10: 1: 1.1---1.2; Its manufacturing process is: the first step condensation is that formaldehyde 120g/I, acetaldehyde 200g/I, calcium hydroxide 200g/I carry out condensation with concentration, and its processing parameter is: 25 ℃ of----60 ℃ of temperature of reaction; Charging time 2 hours; The second step full gear; The evaporation of the 3rd step; The 4th step crystallization; The 5th step is centrifugal; The 6th step drying is a finished product, product single cropping content 95---98%.
Because adopt this technology, effect is remarkable, the one, starting material are easily purchased; The 2nd, the quality product height; The 3rd, the yield height, once through yield can reach 98%; The 4th, reduced investment, pollution-free.
Four, the present invention is made by formaldehyde, acetaldehyde, calcium hydroxide, and its proportioning ratio is: 4.5---10: 1: 1.1---1.2; Its manufacturing process is: the first step condensation is that formaldehyde 120g/I, acetaldehyde 200g/I, calcium hydroxide 200g/I carry out condensation with concentration, and its processing parameter is: 25 ℃ of----60 ℃ of temperature of reaction; Charging time 2 hours; The second step full gear; The evaporation of the 3rd step; The 4th step crystallization; The 5th step is centrifugal; The 6th step drying is a finished product.Product single cropping content 95---98%.
Claims (1)
1, the calcium method is produced tetramethylolmethane technology, and it is characterized in that: made by formaldehyde, acetaldehyde, calcium hydroxide, its proportioning ratio is: 4.5---10: 1: 1.1---1.2; Its manufacturing process is: the first step condensation is that formaldehyde 120g/I, acetaldehyde 200g/I, calcium hydroxide 200g/I carry out condensation with concentration, and its processing parameter is: 25 ℃ of----60 ℃ of temperature of reaction; Charging time 2 hours; The second step full gear; The evaporation of the 3rd step; The 4th step crystallization; The 5th step is centrifugal; The 6th step drying is a finished product, product single cropping content 95---98%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410060307 CN1651373A (en) | 2004-12-03 | 2004-12-03 | Production technology of tetramethylol methane by using ealcium method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410060307 CN1651373A (en) | 2004-12-03 | 2004-12-03 | Production technology of tetramethylol methane by using ealcium method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1651373A true CN1651373A (en) | 2005-08-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410060307 Pending CN1651373A (en) | 2004-12-03 | 2004-12-03 | Production technology of tetramethylol methane by using ealcium method |
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| CN (1) | CN1651373A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100368371C (en) * | 2005-09-29 | 2008-02-13 | 濮阳市鹏鑫化工有限公司 | Method for preparing calcium formate |
| CN101379015B (en) * | 2006-02-03 | 2012-04-18 | 佩什托普特殊化学股份公司 | Process for producing monopentaerythritol of high purity and monopentaerythritol produced by the process |
| CN104230660A (en) * | 2014-09-27 | 2014-12-24 | 安徽金禾实业股份有限公司 | Method for preparing 95 grade pentaerythritol |
| CN114276214A (en) * | 2021-12-10 | 2022-04-05 | 湖北宜化化工股份有限公司宜都分公司 | Production method for producing pentaerythritol by recycling carbide slag |
| CN115108908A (en) * | 2022-05-12 | 2022-09-27 | 广州嘉德乐生化科技有限公司 | Preparation method of multi-purpose additive pentaerythritol stearate |
-
2004
- 2004-12-03 CN CN 200410060307 patent/CN1651373A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100368371C (en) * | 2005-09-29 | 2008-02-13 | 濮阳市鹏鑫化工有限公司 | Method for preparing calcium formate |
| CN101379015B (en) * | 2006-02-03 | 2012-04-18 | 佩什托普特殊化学股份公司 | Process for producing monopentaerythritol of high purity and monopentaerythritol produced by the process |
| CN104230660A (en) * | 2014-09-27 | 2014-12-24 | 安徽金禾实业股份有限公司 | Method for preparing 95 grade pentaerythritol |
| CN104230660B (en) * | 2014-09-27 | 2016-03-09 | 安徽金禾实业股份有限公司 | A kind of preparation method of 95 grades of tetramethylolmethanes |
| CN114276214A (en) * | 2021-12-10 | 2022-04-05 | 湖北宜化化工股份有限公司宜都分公司 | Production method for producing pentaerythritol by recycling carbide slag |
| CN115108908A (en) * | 2022-05-12 | 2022-09-27 | 广州嘉德乐生化科技有限公司 | Preparation method of multi-purpose additive pentaerythritol stearate |
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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 | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |