IT1263008B - PROCEDURE FOR INCREASING THE YIELD IN MELAMINE PRODUCTION PLANTS. - Google Patents
PROCEDURE FOR INCREASING THE YIELD IN MELAMINE PRODUCTION PLANTS.Info
- Publication number
- IT1263008B IT1263008B ITRM920747A ITRM920747A IT1263008B IT 1263008 B IT1263008 B IT 1263008B IT RM920747 A ITRM920747 A IT RM920747A IT RM920747 A ITRM920747 A IT RM920747A IT 1263008 B IT1263008 B IT 1263008B
- Authority
- IT
- Italy
- Prior art keywords
- urea
- melamine
- sent
- yield
- gas stream
- Prior art date
Links
- 229920000877 Melamine resin Polymers 0.000 title abstract 4
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 title abstract 4
- 238000004519 manufacturing process Methods 0.000 title abstract 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract 6
- 239000004202 carbamide Substances 0.000 abstract 6
- 229910021529 ammonia Inorganic materials 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 abstract 2
- 238000005194 fractionation Methods 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 239000006227 byproduct Substances 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Per migliorare la resa negli impianti di produzione della melammina, la corrente gassosa di ammoniaca, è inviata ad una colonna di frazionamento multistadio, nella quale detta corrente gassosa viene a contatto in controcorrente con l'urea fusa utilizzata come materia prima per la produzione di melammina. Detta corrente gassosa di ammoniaca è inviata alla colonna di frazionamento ad una temperatura supercritica compresa nell'intervallo da 130°C fino a 160°C, preferibilmente da 138°C a 150°C, mentre la portata è compresa tra i valori da 0,1 fino a 1,0 Nm3 per Kg di urea, e di preferenza da 0,15 a 0,35 Nm3 per Kg di urea. Durante il contatto tra ammoniaca ed urea fusa, la acqua presente nell'urea fusa viene rimossa dall'ammoniaca gassosa e l'assenza di acqua nell'urea fusa inviata al reattore di sintesi della melammina riduce la formazione di sottoprodotti con conseguente aumento dell'efficienza di conversione a valori compresi tra il 94 ed il 97%.To improve the yield in the melamine production plants, the ammonia gas stream is sent to a multistage fractionation column, in which said gas stream comes into contact against the current with the melted urea used as a raw material for the production of melamine. . Said ammonia gas stream is sent to the fractionation column at a supercritical temperature in the range from 130 ° C to 160 ° C, preferably from 138 ° C to 150 ° C, while the flow rate is between 0, 1 up to 1.0 Nm3 per kg of urea, and preferably from 0.15 to 0.35 Nm3 per kg of urea. During the contact between ammonia and melted urea, the water present in the melted urea is removed from the gaseous ammonia and the absence of water in the melted urea sent to the melamine synthesis reactor reduces the formation of by-products with a consequent increase in efficiency. conversion to values between 94 and 97%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITRM920747A IT1263008B (en) | 1992-10-15 | 1992-10-15 | PROCEDURE FOR INCREASING THE YIELD IN MELAMINE PRODUCTION PLANTS. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITRM920747A IT1263008B (en) | 1992-10-15 | 1992-10-15 | PROCEDURE FOR INCREASING THE YIELD IN MELAMINE PRODUCTION PLANTS. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| ITRM920747A0 ITRM920747A0 (en) | 1992-10-15 |
| ITRM920747A1 ITRM920747A1 (en) | 1994-04-15 |
| IT1263008B true IT1263008B (en) | 1996-07-23 |
Family
ID=11401238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ITRM920747A IT1263008B (en) | 1992-10-15 | 1992-10-15 | PROCEDURE FOR INCREASING THE YIELD IN MELAMINE PRODUCTION PLANTS. |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT1263008B (en) |
-
1992
- 1992-10-15 IT ITRM920747A patent/IT1263008B/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| ITRM920747A0 (en) | 1992-10-15 |
| ITRM920747A1 (en) | 1994-04-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 0001 | Granted |