http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103508933-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_712f36797eeab08c73d3b9096de65e50 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D209-20 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D209-20 |
| filingDate | 2013-08-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2015-07-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_24081dda91780aa79fd26656842de16a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_336a9403f1641c3f43401d356e7298e1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_357cf597c918aa547a1a164e262dd859 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_83ebf288955dd4b274936723c7b4fbde http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_635440a510736c34676be665c71773ed http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7b8b2d828c07900e478c88fb22086d12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f2639136c811661b3c03394de7f885f7 |
| publicationDate | 2015-07-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-103508933-B |
| titleOfInvention | Separating and purifying method for L-tryptophan |
| abstract | The invention relates to a method for separating and purifying L-tryptophan from fermentation liquid. The method comprises the following steps: (1) adjusting the pH value of tryptophan fermentation liquid to a range of 2.5 to 4.0, filtering to remove bacteria by using a ceramic membrane with a hole diameter of 50 to 100 nm; (2) removing impurities in the ceramic membrane filtrate through a reverse-rotating continuous ion-exchanging movable bed, wherein the continuous ion-exchanging movable bed is divided into the following areas in a clock-wise direction, namely a material washing area, a material feeding area, a hydrochloric acid regenerating and acid washing area, an ammonia water degrading and ammonia water-washing area, and a product backwater area; (3) discoloring the desorbed desorption liquid by subjecting the liquid to go through a nano filtering membrane with a molecular weight of 300 to 1000 Da; (4) subjecting the discolored material liquid to go through a reverse osmosis membrane to carry out a drying and condensing treatment. The separated and purified L-tryptophan solution is crystallized after the process of pressure reduced concentration, the total yield of L-tryptophan is about 89%, and the product purity is 99% or more. |
| priorityDate | 2013-08-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 32.