CN1053654C - Process for production of glyoxalic acid - Google Patents
Process for production of glyoxalic acid Download PDFInfo
- Publication number
- CN1053654C CN1053654C CN97106918A CN97106918A CN1053654C CN 1053654 C CN1053654 C CN 1053654C CN 97106918 A CN97106918 A CN 97106918A CN 97106918 A CN97106918 A CN 97106918A CN 1053654 C CN1053654 C CN 1053654C
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- CN
- China
- Prior art keywords
- production
- glyoxalic acid
- reactor
- present
- activated carbon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention discloses a method for producing glyoxalic acid, which comprises the following steps: adding activated carbon to a reactor, heating the activated carbon, adding matching liquid proportionally prepared from equimolar hydrogen peroxide and glyoxal, controlling the speed for dropping the liquid, and cooling and controlling the temperature within the range of 60 to 65 DEG C, and the discharge is filtered to obtain the product. The present invention has the advantages of simple technology, short flow, device saving, easy operation, high utilization of raw materials, low energy consumption, no three wastes and no environment pollution.
Description
The present invention relates to a kind of method of producing oxoethanoic acid.
(science tech publishing house publishes " Fine Organic Chemical product technical manual ", P1088) a kind of method for preparing oxoethanoic acid with the nitric acid oxidation oxalic dialdehyde is disclosed, the difficult control of this method technology, attached product oxalic acid, reduced raw material availability, particularly produce waste gas NO, contaminate environment is serious to equipment corrosion.
" Liaoning chemical industry ", P6 fifth phase P145, the synthetic and application of oxoethanoic acid discloses a kind of process for production of glyoxalic acid, and this method proposes to use N
2Stir oxalic dialdehyde: H
2O
2: FeSO
4=1: 1.1: 0.2 (mol), in 3～8 ℃ of prepared in reaction, we are discovery, 1. H
2O
2Consume FeSO after oxidation
4The aspect is waste; 2. reacting rear material is a red-brown, removes Fe
2(SO
4)
3Post-order process burden heavy, loss of material is big; 3. control 3～8 ℃ reaction conditions, general production is difficult to accomplish.
The objective of the invention is to provide a kind of process for production of glyoxalic acid, and this method processing ease does not produce oxalic acid, and the raw material availability height is free from environmental pollution.
The object of the present invention is achieved like this: add hydrogen peroxide that gac → heat → add prepares in proportion and the equimolar fluid,matching of oxalic dialdehyde → control liquid droping speed and cooling → controlled temperature and be product in reactor after 60～65 ℃ → discharging is filtered.
Technology of the present invention is simple, and flow process is short, and equipment is economized, processing ease, and the raw material availability height, energy consumption is low, and the no three wastes are free from environmental pollution.
Elaborate below in conjunction with embodiment.
With 1 internal diameter 12mm, fill granulated active carbon in long 40cm tubular fixed-bed and make catalyzer, with electric furnace heating (transformer control), add 27% oxalic dialdehyde 3000g of mixing in proportion and 27.5% H in tubular fixed-bed stage casing from header tank
2O
21730g, control liquid droping speed and cooling make temperature of reaction carry out at 60～65 ℃, and the control drop temperature is below 90 ℃, and barrel cold water that connects material cools off, product 4000g, content is more than 21%.
Claims (2)
1, a kind of process for production of glyoxalic acid is characterized in that being made up of following step:
A. in reactor, add carbon compositing catalyst;
B. heating;
C. add the equimolar fluid,matching of hydrogen peroxide and oxalic dialdehyde, control liquid droping speed and cooling, control temperature
Degree is at 60～65 ℃;
D. discharging is filtered.
2, process for production of glyoxalic acid according to claim 1 is characterized in that reactor is tubular fixed-bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97106918A CN1053654C (en) | 1997-04-04 | 1997-04-04 | Process for production of glyoxalic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97106918A CN1053654C (en) | 1997-04-04 | 1997-04-04 | Process for production of glyoxalic acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1167751A CN1167751A (en) | 1997-12-17 |
| CN1053654C true CN1053654C (en) | 2000-06-21 |
Family
ID=5169120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97106918A Expired - Fee Related CN1053654C (en) | 1997-04-04 | 1997-04-04 | Process for production of glyoxalic acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1053654C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098246C (en) * | 2000-03-31 | 2003-01-08 | 清华大学 | Complexing extraction process of purifying glyoxalic acid |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6383041A (en) * | 1986-09-25 | 1988-04-13 | Mitsui Toatsu Chem Inc | Production of glyoxylic acid |
| JPS6383042A (en) * | 1986-09-25 | 1988-04-13 | Mitsui Toatsu Chem Inc | Production of glyoxylic acid from glyoxal |
-
1997
- 1997-04-04 CN CN97106918A patent/CN1053654C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6383041A (en) * | 1986-09-25 | 1988-04-13 | Mitsui Toatsu Chem Inc | Production of glyoxylic acid |
| JPS6383042A (en) * | 1986-09-25 | 1988-04-13 | Mitsui Toatsu Chem Inc | Production of glyoxylic acid from glyoxal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1167751A (en) | 1997-12-17 |
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |