http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006252975-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9e047b72badbec1709b5fe5137d75d39 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_91d0b92a4e7f4196ae34ebab8eaf03c5 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D11-0492 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D11-0488 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D11-0446 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A62D3-00 |
| filingDate | 2005-05-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d80c9083a9fa9ea2470a9eddd70c68cc http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_83f7d2fc575c7adc35f7052f1c3f2aca |
| publicationDate | 2006-11-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2006252975-A1 |
| titleOfInvention | Method for high efficiency salt removal from phenol process byproducts |
| abstract | A method is provided herein for desalting of wastes/byproducts from a cumene-based phenol production process. The phenol production wastes (PPW), which comprise compounds formed during a technical grade cumene hydroperoxide cleavage stage (so called “phenol tar”) and/or aromatic derivatives formed during an alpha-methylstyrene hydrogenation stage (or a target AMS production stage) at a phenol tar to aromatic derivatives mass ratio of about 1:0.001 to about 1:2, and which have a salt content of about 0.1 wt. % to about 4 wt. %, are subjected to desalting by the inventive extraction process. The novel process utilizes an extractant (that may include water and/or an aqueous solution optionally containing Na 2 SO 4 and/or NaHSO 4 ) and having a PPW to extractant mass ratio of about 1:0.1 to about 1:2, and a parting agent (PA), (i.e., “salting-out agent”), that may be selected from an aromatic, such as benzene, ethylbenzene, or cumene, or an aliphatic, unsaturated or cyclic hydrocarbon having a boiling point of 180° C. or lower, and having a PPW to PA mass ratio of about 1:0.05 to about 1:1.5. Desalting of PPW is accomplished by a continuous extraction method which comprises utilization of one or more mixing-settling extraction steps, or of a countercurrent extraction column. The number of extraction steps is determined by the salt content in the PPW feed, the required salt content in the desalted PPW, the PPW to extractant to PA mass ratio, the salt content in the extractant, and the performance of the extraction steps. The pH value of the aqueous or aqueous salt phase is kept above about 0.8 but below 7 to ensure a sodium ion content in the PPW ranging from about 1 ppm to about 500 ppm (as may be adjusted by the number of extraction steps utilized). The extraction process is conducted at temperatures ranging from about 5° C. to about 95 ° C. The parting agent is recirculated after its withdrawal from the PPW. To reduce a makeup of water, the aqueous salt phase may be recirculated continuously to the extraction area, the total salt concentration in the aqueous salt phase never exceeding the limit of salt solubility in water. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2022259125-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10436764-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113480070-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2013043609-A1 |
| priorityDate | 2005-05-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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