1,12-DODECANEDICARBOXYLIC ACID ( FLAKE )
1,12-Dodecanedicarboxylic acid
CAS: 821-38-5
Molecular Formula: C14H26O4
1,12-DODECANEDICARBOXYLIC ACID ( FLAKE ) - Names and Identifiers
| Name | 1,12-Dodecanedicarboxylic acid |
| Synonyms | tetradecanedioate tetradecane diacid RARECHEM AL BO 1123 tetradecandioic acid Tetradecanedioic acid DICARBOXYLIC ACID C14 TETRADECANEDIOIC ACID DODECANEDICARBOXYLIC ACID 1,12-Dodecanedicarboxylic acid 1,12-DODECANEDICARBOXYLIC ACID 1,12-DODECANEDICARBOXYLIC ACID ( FLAKE ) |
| CAS | 821-38-5 |
| EINECS | 212-476-9 |
| InChI | InChI=1/C14H26O4/c15-13(16)11-9-7-5-3-1-2-4-6-8-10-12-14(17)18/h1-12H2,(H,15,16)(H,17,18)/p-2 |
1,12-DODECANEDICARBOXYLIC ACID ( FLAKE ) - Physico-chemical Properties
| Molecular Formula | C14H26O4 |
| Molar Mass | 258.35 |
| Density | 1.0768 (rough estimate) |
| Melting Point | 124-127 °C (lit.) |
| Boling Point | 427.81°C (rough estimate) |
| Flash Point | 230.5°C |
| Water Solubility | SLIGHTLY SOLUBLE |
| Solubility | DMSO (Slightly), Methanol (Slightly) |
| Vapor Presure | 1.3hPa at 20℃ |
| Appearance | White fine powder |
| Color | White to Off-White |
| BRN | 1788202 |
| pKa | 4.48±0.10(Predicted) |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | 1.4650 (estimate) |
| MDL | MFCD00002743 |
| Use | It is mainly used for synthesizing synthetic spices, synthesizing high-grade engineering plastics nylon 1414, hot melt adhesives and coatings. |
1,12-DODECANEDICARBOXYLIC ACID ( FLAKE ) - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| TSCA | Yes |
| HS Code | 29171900 |
1,12-DODECANEDICARBOXYLIC ACID ( FLAKE ) - Reference Information
| LogP | 4.2 at 25℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | decane diacid is a carboxylic acid compound, mainly used in the synthesis of synthetic spices, synthetic high-grade engineering plastics nylon 1414, hot melt adhesives and coatings. |
| Overview | decanedioic acid is an important industrial product among long chain dibasic acids. Mainly used in the synthesis of polymer materials, spices, drugs, etc. For example, as the main raw material for the synthesis of musk ketone, the raw material for the synthesis of high-performance lubricant long carbon chain dibasic acid binary ester with special performance requirements is synthesized, and the high-performance polyamide Hot Melt Adhesive polycondensation monomer is synthesized, and as a polycondensation monomer and diamine condensation reaction to synthesize long carbon chain nylon, with decane diacid as raw material, as a polycondensation monomer and diamine condensation reaction synthesis of long carbon chain nylon, mainly nylon 1314, nylon 1414 and nylon 614. |
| preparation | in the prior art, crude decane diacid prepared by fermentation is used as raw material, using more than 90wt% acetic acid as solvent, first decolorization, filtration, filtrate cooling, crystallization separation, the resulting cake in 70 ℃ ~ 100 ℃ hot water for 120 minutes, temperature 20 ℃ ~ 30 ℃, centrifugal separation, drying. There are the following deficiencies: 1. Dissolution, decolorization section directly using the water content of 5wt%~ 25wt% of the crude decadiane acid as raw material, solvent using more than 90% of the acetic acid aqueous solution. The water introduced into the raw material and the solvent reduces the solubility of acetic acid for the crude decadiane acid and some impurities mixed therein. Lead to some impurities in the form of very small particles into the solution to be crystallized, in the crystallization process, the appropriate temperature, these small particles of impurities become seed crystals, resulting in heterogeneous nucleation phenomenon, are coated in the long-chain dibasic acid crystals. The removal of impurities increases the difficulty. At the same time, the yield of the long carbon chain dibasic acid was also reduced. 2. Cooling natural crystallization method, the residue in the decolorization of the Crystal mother liquor in the filter cake has not been replaced, that is, high temperature water washing, a large number of water and the residue in the filter cake of the Crystal mother liquor contact, due to the influence of water on the solubility of acetic acid, the dissolved impurities in the mother liquor are precipitated instantaneously, Residues in the filter cake are difficult to remove in subsequent processes. 3. High temperature water washing only accelerates the washing speed, and can not wash out more impurities than normal temperature washing, the purification effect is very small, and the heat energy is consumed, and the waste water discharge is increased. Increased production costs. 4. The mother liquor After decolorization, crystallization and separation contains about 5wt% to 6wt% of decane diacid. This part of the mother liquor is untreated and is directly sent to a rectification column for rectification, and the raw materials in the mother liquor are discarded. The product yield is reduced and the production cost is increased. |
| purification method | in a 3000L dissolving and decolorizing reaction kettle, add 98% acetic acid solution 2000L, decadipic acid crude product 660kg, activated carbon 6kg, stirred, heated to 95 ℃, 20 minutes, through the dark flow plate and frame filter press, bag filter, metal titanium rod filter, the decane diacid solution filtered by the four-stage filter system of the stacked filter enters the crystallization kettle, and is cooled to 78 ℃ quickly and evenly in the crystallization kettle. The cooling water is turned off and naturally cooled to 75 ℃, add the purity of more than 99.8% decane two acid as a seed crystal, control the stirring speed 40r/min, the temperature in the crystallization kettle rebound to 77 ℃, and then gradually decreased, the temperature naturally decreased to 68 ℃, slowly turn on the cooling water, control the cooling rate from slow to fast, and finally cool to 25 degrees Celsius, the whole cooling process control cooling time 6~8 hours. The crystallization liquid is centrifuged, and the filtrate is used to prepare the mother liquid for recovery. The filter cake is left in the centrifuge and rinsed with 300L of acetic acid solution with a purity of 98%, the filtrate is prepared to be used as the solvent for the feeding step in the production cycle; The filter cake in the centrifuge is rinsed with 2000L of ion-free water, After completion of the washing, it was centrifuged for 15 minutes, and the filtrate was prepared for use when the mother liquor was recovered. The filter cake with solid content of 85% was obtained. After the filter cake was slurried with 1200L non-ionic water, the filter cake was pumped into a room temperature water-washing tank, 800L non-ionic water was added, stirred for half an hour, and centrifuged and filtered, the filtrate was prepared for use in a circulating washing centrifuge; The filter cake was dried by a double-cone vacuum dryer to obtain 560kg of refined decadipic acid. The total acid content was 99.80% by neutralization titration, the single acid content was 99.36% by gas chromatography, the total nitrogen content was 12ppm, the iron ion content was 0.6ppm, the ash content was 14ppm, and the moisture content was 0.16%. The overall yield of purification was 98.64%. The filtrate obtained by centrifugal separation of the crystallization liquid is mixed with the filtrate produced by the aqueous phase washing centrifuge, and then heated to 85 °c, then cooled to 25 °c for recrystallization, filtered through plate and frame, drying under vacuum gave 91kg of decatetraenoic acid. |
| biological activity | tetranecanedioic acid (tetranecanedicarboxylate) is a C14 dicarboxylic acid. |
Last Update：2024-04-10 22:29:15
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