CN202912869U - Dimethyl oxalate production equipment - Google Patents
Dimethyl oxalate production equipment Download PDFInfo
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- CN202912869U CN202912869U CN 201220509724 CN201220509724U CN202912869U CN 202912869 U CN202912869 U CN 202912869U CN 201220509724 CN201220509724 CN 201220509724 CN 201220509724 U CN201220509724 U CN 201220509724U CN 202912869 U CN202912869 U CN 202912869U
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- heater
- dimethyl oxalate
- preheater
- condenser
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Abstract
The utility model provides dimethyl oxalate production equipment, and relates to chemical product production equipment which has the advantages of simple structure, energy conservation and consumption reduction. The dimethyl oxalate production equipment comprises a heater (1), a carbonylation reactor (2), a condenser (3), a gas-liquid separator (4) and a pre-heater (5), wherein the to-be-heated material inlet of the pre-heater (5) is communicated with a methyl nitrite delivery pipeline (61) and a CO delivery pipeline (62); the to-be-heated material outlet of the pre-heater (5) is connected with the to-be-heated material inlet of the heater (1); the to-be-heated material outlet of the heater (1) is connected with the reaction mass inlet of the carbonylation reactor (2); the reaction mass outlet of the carbonylation reactor (2) is connected with the heating medium inlet of the pre-heater (5); the heating medium outlet of the pre-heater (5) is connected with the condensing material inlet of the condenser (3); and the condensing material gas outlet and the condensing material liquid outlet of the condenser (3) are connected with the inlet of the gas-liquid separator respectively.
Description
Technical field
The utility model relates to a kind of Chemicals production unit, particularly relates to a kind of dimethyl oxalate production unit.
Background technology
Dimethyl oxalate is with methyl alcohol, NO, CO and O
2Intermediates during for waste ethylene glycol, molecular formula are (COOCH
3)
2, the reactions steps of preparation dimethyl oxalate is as follows:
2CO+2CH
3ONO→(COOCH
3)
2+2NO
This reaction be under normal pressure, temperature is that 120-140 ℃, catalyzer are Pd/Al
2O
3Condition under carry out.
As shown in Figure 1, during existing dimethyl oxalate was produced, (molecular formula was CH to the methyl nitrite that esterification column generates
3ONO) behind the esterification column overhead condensation, the gained temperature is that 0-5 ℃ methyl nitrite directly enters well heater 1 ', the CO gas that comes from the outside also directly enters well heater 1 ', enter oxonation device 2 ' after methyl nitrite and CO are heated to 110 ℃ in well heater 1 ', the two carries out oxonation in the oxonation device, this reaction is a thermopositive reaction, its temperature of reaction is 120-130 ℃, the reaction liberated heat is taken away by the outer heat transferring medium of oxonation device shell, after oxonation is finished temperature be the complete unstripped gas of 120-130 ℃ reaction product dimethyl oxalate (liquid phase) and unreacted mix enter condenser 3 ', gas phase and liquid phase initial gross separation in condenser 3 ', gas phase and liquid phase through condensation enter respectively gas-liquid separator 4 ', and separating obtained liquid phase is dimethyl oxalate.In above-mentioned production process, the reaction product dimethyl oxalate (liquid phase) of high temperature and the complete unstripped gas of unreacted directly entered condenser condenses after oxonation was finished, need to consume more phlegma, and used phlegma need to be lowered the temperature equally in order to recycle, and has caused like this waste of energy.
The utility model content
The technical problems to be solved in the utility model provides a kind of dimethyl oxalate production unit simple in structure, energy-saving and cost-reducing.
The utility model dimethyl oxalate production unit, comprise well heater, the oxonation device, condenser, gas-liquid separator, also comprise preheater, wherein the material entrance to be heated of preheater communicates with methyl nitrite transport pipe and CO transport pipe, the material outlet to be heated of preheater links to each other with the material entrance to be heated of well heater, the material outlet to be heated of well heater links to each other with the reaction mass entrance of oxonation device, the reacting material outlet of oxonation device links to each other with the heating medium entrance of preheater, the heating medium outlet of preheater links to each other with the condensation material inlet of condenser, and outlet links to each other with the gas-liquid separator entrance respectively the condensation material pneumatic outlet of condenser with the condensation feed liquid.
The utility model dimethyl oxalate production unit, wherein said oxonation device is fixed-bed reactor.
The use procedure of the utility model dimethyl oxalate production unit is as follows:
20-30 ℃ CO gas and 0-5 ℃ methyl nitrite enter preheater, methyl nitrite and CO enter well heater be heated to 80-100 ℃ in preheater after, after well heater is heated to 110 ℃ with methyl nitrite and CO, methyl nitrite and CO enter the oxonation device again and carry out oxonation, this reaction is that thermopositive reaction and temperature of reaction are 120-130 ℃, the reaction liberated heat is taken away by the heat transferring medium of oxonation device shell, after oxonation is finished temperature be the complete unstripped gas of 120-130 ℃ reaction product dimethyl oxalate (liquid phase) and unreacted mix enter preheater as heating medium, heating medium (being the material behind the oxonation) and material to be heated (methyl nitrite and CO before the reaction) heat exchange in preheater, temperature rises to 80-100 ℃ after methyl nitrite before the reaction and the CO heat absorption, and then enter well heater, material behind the oxonation in preheater after the heat release gas temperature be down to about 80 ℃, and then enter into condenser with condensation of gas to 60 ℃, enter afterwards gas-liquid separator, obtain the liquid product dimethyl oxalate.
The utility model dimethyl oxalate production unit difference from prior art is: increased preheater and carried out the preheating of methyl nitrite and CO, and be to have utilized the entrained heat of the material behind the oxonation in the warm, the preheating of methyl nitrite and CO can be saved in the well heater consumption as the steam of heating medium; Simultaneously the material behind the oxonation is equivalent to carry out precooling in preheater, is cooled to first about 80 ℃ by 120-130 ℃, and then enters condenser condenses, can save like this consumption of phlegma; The utility model dimethyl oxalate production unit is by to the simple transformation of original production unit, realized recycling energy, energy-saving and cost-reducing purpose in internal system.
Below in conjunction with accompanying drawing the utility model dimethyl oxalate production unit is described further.
Description of drawings
Fig. 1 is the structural representation of the utility model dimethyl oxalate production unit prior art;
Fig. 2 is the structural representation of the utility model dimethyl oxalate production unit.
Embodiment
As shown in Figure 2, the utility model dimethyl oxalate production unit comprises well heater 1, oxonation device 2, condenser 3, gas-liquid separator 4, also comprise preheater 5, wherein the material entrance to be heated of preheater 5 communicates with methyl nitrite transport pipe 61 and CO transport pipe 62, the material outlet to be heated of preheater 5 links to each other with the material entrance to be heated of well heater 1, the material outlet to be heated of well heater 1 links to each other with the reaction mass entrance of oxonation device 2, the reacting material outlet of oxonation device 2 links to each other with the heating medium entrance of preheater 5, the heating medium outlet of preheater 5 links to each other with the condensation material inlet of condenser 3, outlet links to each other with gas-liquid separator 4 entrances respectively the condensation material pneumatic outlet of condenser 3 with the condensation feed liquid, and described oxonation device 2 is fixed-bed reactor.
Above-described embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that those of ordinary skills make the technical solution of the utility model all should fall in the definite protection domain of the utility model claims.
Claims (2)
1. dimethyl oxalate production unit, comprise well heater (1), oxonation device (2), condenser (3), gas-liquid separator (4), it is characterized in that: also comprise preheater (5), wherein the material entrance to be heated of preheater (5) communicates with methyl nitrite transport pipe (61) and CO transport pipe (62), the material outlet to be heated of preheater (5) links to each other with the material entrance to be heated of well heater (1), the material outlet to be heated of well heater (1) links to each other with the reaction mass entrance of oxonation device (2), the reacting material outlet of oxonation device (2) links to each other with the heating medium entrance of preheater (5), the heating medium outlet of preheater (5) links to each other with the condensation material inlet of condenser (3), and outlet links to each other with gas-liquid separator (4) entrance respectively the condensation material pneumatic outlet of condenser (3) with the condensation feed liquid.
2. dimethyl oxalate production unit according to claim 1, it is characterized in that: described oxonation device (2) is fixed-bed reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220509724 CN202912869U (en) | 2012-09-27 | 2012-09-27 | Dimethyl oxalate production equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220509724 CN202912869U (en) | 2012-09-27 | 2012-09-27 | Dimethyl oxalate production equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202912869U true CN202912869U (en) | 2013-05-01 |
Family
ID=48161197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220509724 Withdrawn - After Issue CN202912869U (en) | 2012-09-27 | 2012-09-27 | Dimethyl oxalate production equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202912869U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102850216A (en) * | 2012-09-27 | 2013-01-02 | 安徽淮化股份有限公司 | Dimethyl oxalate production device |
| CN110066219A (en) * | 2019-04-24 | 2019-07-30 | 亿利资源集团有限公司 | A kind of preparation method of carbonylation feeding system and dimethyl oxalate |
-
2012
- 2012-09-27 CN CN 201220509724 patent/CN202912869U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102850216A (en) * | 2012-09-27 | 2013-01-02 | 安徽淮化股份有限公司 | Dimethyl oxalate production device |
| CN102850216B (en) * | 2012-09-27 | 2015-05-13 | 安徽淮化股份有限公司 | Dimethyl oxalate production device |
| CN110066219A (en) * | 2019-04-24 | 2019-07-30 | 亿利资源集团有限公司 | A kind of preparation method of carbonylation feeding system and dimethyl oxalate |
| CN110066219B (en) * | 2019-04-24 | 2022-04-15 | 亿利资源集团有限公司 | Carbonylation feeding system and preparation method of dimethyl oxalate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130501 Effective date of abandoning: 20150513 |
|
| RGAV | Abandon patent right to avoid regrant |