EP1427691A1 - Method for making adipic acid crystals and resulting crystals - Google Patents
Method for making adipic acid crystals and resulting crystalsInfo
- Publication number
- EP1427691A1 EP1427691A1 EP02779638A EP02779638A EP1427691A1 EP 1427691 A1 EP1427691 A1 EP 1427691A1 EP 02779638 A EP02779638 A EP 02779638A EP 02779638 A EP02779638 A EP 02779638A EP 1427691 A1 EP1427691 A1 EP 1427691A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- crystals
- adipic acid
- ppm
- atmosphere
- water
- 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.)
- Withdrawn
Links
- 239000013078 crystal Substances 0.000 title claims abstract description 93
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 239000001361 adipic acid Substances 0.000 title claims abstract description 41
- 235000011037 adipic acid Nutrition 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000002425 crystallisation Methods 0.000 claims abstract description 11
- 230000008025 crystallization Effects 0.000 claims abstract description 11
- 238000003860 storage Methods 0.000 claims description 14
- 230000035800 maturation Effects 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 230000002745 absorbent Effects 0.000 claims description 5
- 239000002250 absorbent Substances 0.000 claims description 5
- 239000012736 aqueous medium Substances 0.000 claims description 3
- 239000011358 absorbing material Substances 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000003750 conditioning effect Effects 0.000 claims 1
- 230000000737 periodic effect Effects 0.000 claims 1
- 230000008569 process Effects 0.000 description 9
- 238000004806 packaging method and process Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 238000005054 agglomeration Methods 0.000 description 6
- 230000002776 aggregation Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 239000004952 Polyamide Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 229960001866 silicon dioxide Drugs 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011549 crystallization solution Substances 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
Definitions
- the present invention relates to a method for manufacturing adipic acid crystals, as well as the crystals obtained.
- It relates more concretely to a process for the treatment of adipic acid crystals obtained at the outlet of crystallization in order to obtain crystals which can be stored with a minimum caking ability.
- Adipic acid is a great intermediate product, especially in the field of polymers and more particularly polyamide and in the synthesis of polyurethanes. It is also used in many other applications as adjuvants in detergent compositions, for example.
- Adipic acid is generally synthesized by oxidation with nitric acid of a cyclohexanone / cyciohexanol mixture in the presence of oxidation catalysts such as vanadium and copper.
- the adipic acid is recovered and purified by successive crystallization operations. This crystallization is most often carried out in an aqueous medium.
- adipic acid is notably separated from the other dicarboxylic acids formed such as glutaric acid, succinic acid.
- the adipic acid crystals produced at the outlet of crystallization are generally oblong-shaped crystals which can have a very irregular surface.
- crystals After washing and drying, these crystals are generally stored in large drums, bags or containers and possibly transported to the place of their use, for example installations for manufacturing polyamide or adipate salt of hexamethylene diamine.
- One of the aims of the present invention is to propose a process allowing the production of adipic acid crystals having a minimum caking capacity when they are stored, to obtain good flowability during the loading or unloading of the containers or container containing them.
- the invention firstly relates to adipic acid crystals obtained by crystallization or treatment in an aqueous medium which can be stored in containers or receptacles which are impermeable to external humidity for variable durations, without risk of caking, agglomeration. or collage of crystals.
- the adipic acid crystals of the invention it is easy to empty the storage or transport containers. The implementation of adipic acid is therefore greatly facilitated.
- the adipic acid crystals are characterized in that the content of exchangeable water in the crystals is less than or equal to 100 ppm, preferably less than 50 ppm.
- the adipic acid crystals may also contain water called constituting water called constitutive which comes from the inclusion of an amount of crystallization solution during the formation or processing of the crystals.
- This water is generally not exchangeable, that is to say that it does not migrate, without external action, to the surface of the granule.
- Another characteristic of the crystals of the invention is the total concentration of water in the granule which must be greater than that in exchangeable water by at least 20 ppm. Preferably, this difference is between approximately 30 ppm and 2000 ppm, advantageously between 50 and 1000 ppm.
- the amount of water exchangeable by weight of crystals is determined according to the method below:
- a quantity of powder or crystals to be analyzed of approximately exactly 300 g is placed in a hermetically closed container and having a high seal against the external atmosphere.
- the volume of the container is equal to 500 ml.
- a moisture absorbing material constituted by Silicagel crystals (a weight of 2 g weighed approximately exactly) is also placed above or on the mass of powder or crystals to be analyzed. This absorbent material is placed in a watch glass in order to avoid any contact between the different materials.
- the products to be analyzed and the absorbent material are kept in the hermetically closed container for a period of 24 hours under ambient conditions of temperature and pressure, that is to say under atmospheric pressure and at a temperature between 5 ° C and 25 °. C approx. After 24 hours, the absorbent material is weighed. The difference in weight is corrected by the difference in weight obtained for a blank test carried out in parallel, in which no powder or crystals to be analyzed had been introduced into the container and produced under the same conditions as above.
- the difference in actual weight is assimilated to a recovery of the exchangeable water contained in the powder or the crystals to be analyzed by the absorbent material. It is expressed in ppm relative to the mass of powder or crystals introduced into the container.
- the total water concentration in the crystals is determined according to the following analysis protocol:
- the analyzes are carried out in a DSC7 cell from the company Perkin-Elmer with the following operating conditions:
- Another object of the present invention is a process for the production of adipic acid crystals having the above characteristics.
- This process consists in subjecting the adipic acid crystals obtained by crystallization to maturation.
- This maturation consists in maintaining the crystals at a temperature between 10 ° C and 80 ° C in an atmosphere having an absolute humidity of less than 20 g / Nm 3 , for a period necessary to allow at least the majority of the exchangeable water contained in the crystals to be eliminated.
- the duration of maturation is determined to obtain a concentration of exchangeable water in the crystals of less than 100 ppm, preferably less than 50 ppm, as indicated above.
- the method implements means for maintaining the absolute humidity content of the atmosphere in which the crystals are placed at a value of less than 20 g per Nm 3 of gas, for example air.
- the absolute humidity will advantageously be kept at a value of less than 10 g per Nm 3 of air.
- Such means are, for example, means for absorbing moisture such as hygroscopic products such as silica gel or the use of a dry gas such as dry air which is periodically or constantly renewed.
- the crystals can form a fixed bed through which the dry air flow passes or a fluidized bed if the speed of the air flow is sufficient to set the crystals in motion. It is also possible to carry out the stage of maturation of the crystals by placing them in non-leaktight packaging, that is to say allowing at least the moisture contained in the crystals to evaporate in the atmosphere surrounding the packaging or more advantageously allowing only the evaporation of moisture to the outside of the packaging and preventing moisture from entering said packaging.
- the packages can be placed either in a closed enclosure having an atmosphere with a controlled absolute humidity content and low enough to allow the evaporation of the exchangeable water contained in the crystals, or in an open enclosure with renewal of the atmosphere so that it has an absolute humidity low enough to allow evaporation of the exchangeable water.
- a closed enclosure having an atmosphere with a controlled absolute humidity content and low enough to allow the evaporation of the exchangeable water contained in the crystals, or in an open enclosure with renewal of the atmosphere so that it has an absolute humidity low enough to allow evaporation of the exchangeable water.
- adipic acid crystals treated by the process of the invention are generally obtained by crystallization from an aqueous solution of adipic acid.
- methods of making adipic acid generally include a step of purifying adipic acid which consists of crystallizing the acid from water. This crystallization can be carried out in a single step or in several successive crystallization steps.
- the adipic acid recovered by filtration or centrifugation is in the form of crystals of more or less large dimensions and of irregular shape.
- the distribution of crystal sizes can be very wide as well as narrow.
- the crystals can also be subjected to one or more washes with water. Finally, the crystals are dried and then stored in containers or packaging for transport or food at the place of their use.
- the adipic acid crystals are subjected after drying to the maturing step described above.
- the dried crystals can be stored and subjected to the maturing stage before being packaged in the transport containers.
- the maturing step can also be carried out during the transport of said crystals by using suitable containers, for example a sealed container with respect to external humidity but allowing the evaporation of exchangeable water or maintained in an atmosphere with absolute humidity. low.
- the stage of maturation of the crystals is carried out before the packaging thereof for transport, this packaging being implemented in sealed containers to avoid the uptake of moisture.
- the adipic acid crystals obtained by the process of the invention have excellent flowability and a very low clumping ability, the containers can thus be emptied without difficulty, facilitating the control of the feeding of the crystals. adipic acid in the various installations for the use thereof.
- a storage test in a sealed container of the adipic acid described above and which has not undergone any maturation shows numerous agglomerations of crystals between them preventing easy withdrawal of the crystals from the storage container.
- the product contained in the column is kept for about 15 hours in the column and then subjected to fluidization by dry air for a few minutes. After keeps this treated acid in a sealed storage container for several weeks, no agglomeration of crystals is observed.
- the exchangeable water content according to the protocol described above is less than 10 ppm and a total water concentration of 920 ppm
- Hygrometry sensors placed in the product make it possible to monitor the relative humidity content in the atmosphere of the product. After a few hours of storage, there is a balance between the absolute humidity outside and the absolute humidity inside the bag. Under these storage conditions, no agglomeration of crystals is observed.
- the exchangeable water content of these crystals is less than 20 ppm and a total water concentration of 910 ppm
- 20 T of adipic acid crystals with an average size of 320 ⁇ m and having an exchangeable water concentration of 120 ppm are bagged in a container with a bag which is not very permeable to the humidity of gases (less than 1 g / nv7d).
- the top of the container (with an area of 20m 2 ) is swept by a dry gas (400 Nm 3 / h) for a period of 10 days. After stopping this treatment and closing the bag, the product does not clot and the container can be emptied easily (in less than an hour) after 2 months of transport.
- the absolute humidity during transport was less than 10g / m3, and the exchangeable water content of the crystals at the outlet of the container was less than 10 ppm and a total water concentration of 890 ppm.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0112039 | 2001-09-18 | ||
FR0112039A FR2829761B1 (en) | 2001-09-18 | 2001-09-18 | PROCESS FOR PRODUCING ADIPIC ACID CRYSTALS AND CRYSTALS OBTAINED THEREBY |
PCT/FR2002/003167 WO2003024912A1 (en) | 2001-09-18 | 2002-09-17 | Method for making adipic acid crystals and resulting crystals |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1427691A1 true EP1427691A1 (en) | 2004-06-16 |
Family
ID=8867382
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02779638A Withdrawn EP1427691A1 (en) | 2001-09-18 | 2002-09-17 | Method for making adipic acid crystals and resulting crystals |
Country Status (10)
Country | Link |
---|---|
US (1) | US20040242927A1 (en) |
EP (1) | EP1427691A1 (en) |
JP (1) | JP2005503408A (en) |
KR (1) | KR100653148B1 (en) |
CN (1) | CN1296339C (en) |
BR (1) | BR0212885A (en) |
FR (1) | FR2829761B1 (en) |
RU (1) | RU2269507C2 (en) |
UA (1) | UA74475C2 (en) |
WO (1) | WO2003024912A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6946571B2 (en) * | 2003-09-30 | 2005-09-20 | Invista North America S.A.R.L. | Drying of adipic acid |
KR101107205B1 (en) * | 2009-11-13 | 2012-01-25 | (주)성안기술단 | Safety check-up method of steel box slab section of bridge |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0328342A3 (en) * | 1988-02-08 | 1990-08-01 | MITSUI TOATSU CHEMICALS, Inc. | Process for producing aromatic polyamides |
US5471001A (en) * | 1994-12-15 | 1995-11-28 | E. I. Du Pont De Nemours And Company | Crystallization of adipic acid |
FR2795721B1 (en) * | 1999-06-29 | 2003-04-18 | Rhone Poulenc Fibres | PROCESS FOR THE MANUFACTURE OF ADIPIC ACID |
EP1198444A1 (en) * | 1999-07-23 | 2002-04-24 | Chemintel (India) Private Limited | Process for crystallization of dicarboxylic acids |
-
2001
- 2001-09-18 FR FR0112039A patent/FR2829761B1/en not_active Expired - Fee Related
-
2002
- 2002-09-17 EP EP02779638A patent/EP1427691A1/en not_active Withdrawn
- 2002-09-17 JP JP2003528760A patent/JP2005503408A/en active Pending
- 2002-09-17 WO PCT/FR2002/003167 patent/WO2003024912A1/en active Application Filing
- 2002-09-17 KR KR1020047003958A patent/KR100653148B1/en not_active IP Right Cessation
- 2002-09-17 BR BR0212885-3A patent/BR0212885A/en not_active IP Right Cessation
- 2002-09-17 CN CNB028183150A patent/CN1296339C/en not_active Expired - Fee Related
- 2002-09-17 US US10/489,882 patent/US20040242927A1/en not_active Abandoned
- 2002-09-17 RU RU2004111678/04A patent/RU2269507C2/en not_active IP Right Cessation
- 2002-09-17 UA UA2004032033A patent/UA74475C2/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO03024912A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR100653148B1 (en) | 2006-12-01 |
FR2829761B1 (en) | 2004-02-20 |
RU2269507C2 (en) | 2006-02-10 |
KR20040044945A (en) | 2004-05-31 |
CN1555354A (en) | 2004-12-15 |
BR0212885A (en) | 2004-10-13 |
CN1296339C (en) | 2007-01-24 |
US20040242927A1 (en) | 2004-12-02 |
FR2829761A1 (en) | 2003-03-21 |
JP2005503408A (en) | 2005-02-03 |
WO2003024912A1 (en) | 2003-03-27 |
RU2004111678A (en) | 2005-09-10 |
UA74475C2 (en) | 2005-12-15 |
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Legal Events
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Extension state: AL LT LV MK RO SI |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: MASTEAU, JEAN-CLAUDE Inventor name: GISBERT, THIERRY |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: RHODIA OPERATIONS |
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17Q | First examination report despatched |
Effective date: 20090626 |
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18D | Application deemed to be withdrawn |
Effective date: 20091107 |