RU2007143875A - METHOD FOR PRODUCING ADIPIC ACID FROM CAPROLACTAM PRODUCTION WASTE BY CYCLOGEXANE OXIDATION - Google Patents
METHOD FOR PRODUCING ADIPIC ACID FROM CAPROLACTAM PRODUCTION WASTE BY CYCLOGEXANE OXIDATION Download PDFInfo
- Publication number
- RU2007143875A RU2007143875A RU2007143875/04A RU2007143875A RU2007143875A RU 2007143875 A RU2007143875 A RU 2007143875A RU 2007143875/04 A RU2007143875/04 A RU 2007143875/04A RU 2007143875 A RU2007143875 A RU 2007143875A RU 2007143875 A RU2007143875 A RU 2007143875A
- Authority
- RU
- Russia
- Prior art keywords
- caprolactam
- mol
- oxidation
- adipic acid
- concentrated sulfuric
- Prior art date
Links
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 title claims abstract 22
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 title claims abstract 10
- 235000011037 adipic acid Nutrition 0.000 title claims abstract 5
- 239000001361 adipic acid Substances 0.000 title claims abstract 5
- 230000003647 oxidation Effects 0.000 title claims abstract 5
- 238000007254 oxidation reaction Methods 0.000 title claims abstract 5
- 238000004519 manufacturing process Methods 0.000 title claims abstract 4
- 239000002699 waste material Substances 0.000 title claims abstract 3
- 238000000034 method Methods 0.000 claims abstract 10
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract 5
- 238000006243 chemical reaction Methods 0.000 claims abstract 4
- 239000007800 oxidant agent Substances 0.000 claims abstract 4
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000002253 acid Substances 0.000 claims abstract 2
- 238000004821 distillation Methods 0.000 claims abstract 2
- 239000007788 liquid Substances 0.000 claims abstract 2
- 239000000203 mixture Substances 0.000 claims abstract 2
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1. Способ получения адипиновой кислоты окислением капролактама при температуре 75-100°С (предпочтительно 100°С) в жидкой среде, отличающийся тем, что реакцию осуществляют с помощью окислителя, представляющего собой смесь 30% перекиси водорода и концентрированной серной кислоты (96%). ! 2. Способ по п.1, отличающийся тем, что в качестве исходного сырья используются капролактамсодержащиеся отходы - кубы дистилляции производства капролактама окислением циклогексана с содержанием капролактама не менее 90 мас.%. ! 3. Способ по п.1, отличающийся тем, что соотношение H2O2/КЛ составляет (1-1,1):1 моль/моль. ! 4. Способ по п.1, отличающийся тем, что количество концентрированной серной кислоты в окислителе должно составлять 0,2-0,23 моль/кг реакционной массы. ! 5. Способ по п.1, отличающийся тем, что оксидат с целью выделения адипиновой кислоты подкисляют концентрированной серной кислотой (96%) из расчета 0,5 моль кислоты на 1 моль капролактама.1. The method of producing adipic acid by oxidation of caprolactam at a temperature of 75-100 ° C (preferably 100 ° C) in a liquid medium, characterized in that the reaction is carried out using an oxidizing agent, which is a mixture of 30% hydrogen peroxide and concentrated sulfuric acid (96%) . ! 2. The method according to claim 1, characterized in that caprolactam-containing waste is used as a feedstock — distillation cubes of caprolactam production by oxidation of cyclohexane with a caprolactam content of at least 90 wt.%. ! 3. The method according to claim 1, characterized in that the ratio of H2O2 / KL is (1-1.1): 1 mol / mol. ! 4. The method according to claim 1, characterized in that the amount of concentrated sulfuric acid in the oxidizing agent should be 0.2-0.23 mol / kg of the reaction mass. ! 5. The method according to claim 1, characterized in that the oxidate is acidified with concentrated sulfuric acid (96%) at the rate of 0.5 mol of acid per 1 mol of caprolactam in order to isolate adipic acid.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2007143875/04A RU2366645C1 (en) | 2007-11-26 | 2007-11-26 | Method for adipic acid preparation from wastes of caprolactam production by cyclohexane oxidation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2007143875/04A RU2366645C1 (en) | 2007-11-26 | 2007-11-26 | Method for adipic acid preparation from wastes of caprolactam production by cyclohexane oxidation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| RU2007143875A true RU2007143875A (en) | 2009-06-10 |
| RU2366645C1 RU2366645C1 (en) | 2009-09-10 |
Family
ID=41024071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RU2007143875/04A RU2366645C1 (en) | 2007-11-26 | 2007-11-26 | Method for adipic acid preparation from wastes of caprolactam production by cyclohexane oxidation |
Country Status (1)
| Country | Link |
|---|---|
| RU (1) | RU2366645C1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2681195C1 (en) * | 2018-05-21 | 2019-03-04 | Федеральное автономное учреждение "25 Государственный научно-исследовательский институт химмотологии Министерства обороны Российской Федерации" | Method for obtaining adipinic acid concentrate and sodium alkali from alkaline wastewater from caprolactam production facilities |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6218573B1 (en) * | 1998-07-02 | 2001-04-17 | Rpc Inc. | Methods of recovering catalyst in solution in the oxidation of cyclohexane to adipic acid |
| FR2791667B1 (en) * | 1999-03-30 | 2002-05-24 | Rhone Poulenc Fibres | PROCESS FOR THE OXIDATION OF HYDROCARBONS, ALCOHOLS AND / OR KETONES |
-
2007
- 2007-11-26 RU RU2007143875/04A patent/RU2366645C1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| RU2366645C1 (en) | 2009-09-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20131127 |