CN102698466B - Remove the method for natural extract Pesticide Residues - Google Patents

Remove the method for natural extract Pesticide Residues Download PDF

Info

Publication number
CN102698466B
CN102698466B CN201210193935.7A CN201210193935A CN102698466B CN 102698466 B CN102698466 B CN 102698466B CN 201210193935 A CN201210193935 A CN 201210193935A CN 102698466 B CN102698466 B CN 102698466B
Authority
CN
China
Prior art keywords
natural extract
residues
extraction
pesticides
pesticide residues
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.)
Active
Application number
CN201210193935.7A
Other languages
Chinese (zh)
Other versions
CN102698466A (en
Inventor
李凤飞
李俊和
杨文江
孙国峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chenguang Biotech Group Co Ltd
Original Assignee
Chenguang Biotech Group Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chenguang Biotech Group Co Ltd filed Critical Chenguang Biotech Group Co Ltd
Priority to CN201210193935.7A priority Critical patent/CN102698466B/en
Publication of CN102698466A publication Critical patent/CN102698466A/en
Application granted granted Critical
Publication of CN102698466B publication Critical patent/CN102698466B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Extraction Or Liquid Replacement (AREA)

Abstract

The invention discloses a kind of method removing natural extract Pesticide Residues, the steps include: the liquid natural extract containing residues of pesticides, or the liquid natural extract mixed with edible oil joins in extraction kettle; Irregular loose heap metal packing is provided with in described extraction kettle; Then quiet dynamic bind supercritical CO is adopted 2fluids extraction extracts the residues of pesticides in liquid natural extract, then resolves CO 2solvent, can obtain the natural extract removing residues of pesticides.This method does not use any organic solvent and poisonous and harmful substance to do remover, has the advantages that to remove process safety, non-secondary pollution.This method by adding irregular loose heap metal packing, thus effectively improving residues of pesticides removal effect, avoiding producing the phenomenon such as bias current or channel; Have the advantages that clearance is higher, simple for process, production cost is low, be particularly useful for the organic phosphates in partially fat-soluble natural extract, carbamates and pyrethroid pesticide remained removal.

Description

Remove the method for natural extract Pesticide Residues
Technical field
The present invention relates to a kind of method of purification of natural extract, especially a kind of method removing natural extract Pesticide Residues.
Background technology
Current uphold nature, back to nature have become international irresistible historical trend, along with improving constantly of people's living standard, people more and more do not grudge and spending for safety, for health, more and more do not looked at by people institute parent containing residues of pesticides product, countries in the world, particularly developed country are paid much attention to Pesticide Residue, all define more and more stricter limit standard to various agricultural byproducts Pesticide Residues.Many countries are all technology barriers with Pesticide Residue, and the import of restriction agricultural byproducts, protecting agriculture is produced.Therefore produce not containing residues of pesticides or residues of pesticides product up to standard for people healthy, increase products export and earn foreign exchange all significant.
Report according to domestic and international publication, residues of pesticides minimizing technology is more, and to utilize supercritical extraction technique to remove residues of pesticides are a kind of more recent technology: a kind of 1, method (publication number CN101156881A) removing ginseng Pesticide Residues, mainly utilizes propane to do solvent to solid ginseng pulverate Pesticide Residues and remove; In the method, propane critical-temperature compare Gao ﹝ 97 DEG C ﹞ is not easy to reach, and propane is inflammable and explosive, causes its use dangerous.2, a kind of removal methods (publication number CN101810658A) of residual pesticide from ginseng, mainly utilize 1,1,1,2-tetrafluoro hexane does solvent and removes to solid ginseng pulverate Pesticide Residues, 1 in the method, 1,1,2-tetrafluoro hexane has larger harm to atmospheric environment, has and uses unsafe deficiency.3, from tealeaves, extract the method (publication number CN1837201A) of Tea Polyphenols, theanine, tea polysaccharide, Tea Pigment, mainly utilize CO 2do solvent to ethyl acetate mutually in caffeine, residues of pesticides and dissolvent residual remove, its raw material is the comparatively large water-soluble products partially of polarity; At present also not about supercritical CO 2remove partially fat-soluble natural extract Pesticide Residues system process report.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method that is safe, removal natural extract Pesticide Residues effectively.
For solving the problems of the technologies described above, the technical solution used in the present invention is: by the liquid natural extract containing residues of pesticides, or the liquid natural extract mixed with edible oil joins in extraction kettle; Irregular loose heap metal packing is provided with in described extraction kettle; Then quiet dynamic bind supercritical CO is adopted 2fluids extraction extracts the residues of pesticides in liquid natural extract, then resolves CO 2solvent, can obtain the natural extract removing residues of pesticides.
The weight ratio of edible oil of the present invention and liquid natural extract is 0 ~ 1:1; Described edible oil is salad oil, sunflower oil, rapeseed oil or peanut oil.
Irregular loose heap metal packing of the present invention is Intalox metal tower packing, and amount of filler is 1/2 ~ 2/3 of extraction kettle volume; The material of described irregular loose heap metal packing is stainless steel.
Static extracting pressure of the present invention is 10 ~ 15MPa, and extraction time is 20 ~ 30min; Described dynamic extraction pressure is 20 ~ 35MPa, and extraction time is 2 ~ 10h; The extraction temperature of quiet dynamic extraction is 40 ~ 75 DEG C.
The secondary that resolves to of the present invention is resolved: it is 7.5 ~ 10MPa that one-level resolves pressure, and it is 4 ~ 6MPa that secondary resolves pressure, and resolution temperature is 30 ~ 50 DEG C.
Gaseous state CO after parsing of the present invention 2after adsorbent, again for extraction; Described adsorbent is active carbon, discolour silica gel or aluminium oxide.
Natural extract of the present invention is partially fat-soluble natural extract, described residues of pesticides be organic phosphates, carbamates and pyrethroid pesticide remained in one or more.
The beneficial effect adopting technique scheme to produce is: the present invention does not use any organic solvent and poisonous and harmful substance to do remover in the process removing residues of pesticides, and therefore the present invention has the advantages that to remove process safety, non-secondary pollution.Play the adding of edible oil of the present invention dilution agriculture residual and extract and remove the residual effect of agriculture with grease constituents in extraction process; Irregular loose heap metal packing add the effect playing balanced air-flow, strengthen the contact area of material and supercritical fluid, thus effectively improve residues of pesticides removal effect, avoid phenomenon such as generation bias current or channel etc.; The employing of static extracting mainly makes supercritical fluid fully contact with material middle peasant is residual, fully extracts removal agriculture residual when being convenient to dynamic.The present invention utilizes supercritical CO 2fluids extraction and irregular loose heap metal packing, make it to have the advantages that clearance is higher, simple for process, production cost is low, be particularly useful for the organic phosphates in partially fat-soluble natural extract, carbamates and pyrethroid pesticide remained removal.
The present invention is by the gaseous state CO after parsing 2re-use again with after adsorbent, avoid and do not resolve the impact on extraction of residues of pesticides completely, thus effectively can improve extraction yield.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further detailed explanation.
Embodiment 1: the method for this removal natural extract Pesticide Residues is to remove capsicum red pigment Pesticide Residues, and concrete technology step is as described below.
At supercritical CO 2put into the metal packing of rectangular saddle ring stainless steel loose heap in extraction kettle (Guangzhou Mei Chen high and new separation technology company produces the overcritical device of 300L*2), addition is 1/2 of extraction kettle volume.Get 100kg capsicum red pigment and add 30kg rapeseed oil (10:3), squeeze in extraction kettle; Adopt first static state, more dynamic quiet dynamic bind supercritical CO 2fluids extraction carries out boosting extraction, and static extracting pressure is 12MPa, and the time is 25min; Dynamic extraction pressure is 25MPa, extracts 5.0 hours, extraction temperature 50 DEG C, CO 2flow is 1250L/h.CO after extraction 2solvent is resolved, and one-level parsing pressure is 10MPa, one-level resolution temperature is 40 DEG C, and it is 5MPa that secondary resolves pressure, and secondary resolution temperature is 35 DEG C.Gaseous state CO after parsing 2with active carbon and discolour silica gel absorption in absorber, remain in gaseous state CO completely to remove not resolve 2in residues of pesticides, through absorption after gaseous state CO 2again for supercritical CO 2fluid extraction.
By measuring residues of pesticides content such as Rogor, carbendazim, metrifonate, phoxim, Permanone, flucythrinate, killing logvalue, chlopyrifos in raw material and product, Rogor clearance 97.8%, carbendazim clearance 91.7%, metrifonate clearance 95.8%, phoxim clearance 88.7%, Permanone clearance 98.5%, flucythrinate clearance 90.1%, killing logvalue clearance 92.1%, chlopyrifos clearance 93.1%, all reaches desirable residues of pesticides removal effect.
Embodiment 2: the method for this removal natural extract Pesticide Residues is to remove safflower seed oil Pesticide Residues, and concrete technology step is as described below.
At supercritical CO 2put into the metal packing of rectangular saddle ring stainless steel loose heap in extraction kettle (Guangzhou Mei Chen high and new separation technology company produces the overcritical device of 300L*2), addition is 2/3 of extraction kettle volume.Get 120kg safflower seed oil and add 10kg salad oil (12:1), squeeze in extraction kettle; Adopt supercritical CO 2fluid carries out boosting extraction, and static extracting pressure is 10MPa, and the time is 30min, and dynamic extraction pressure is 30MPa, extracts 8.0 hours, extraction temperature 65 DEG C, CO 2flow is 1350L/h.CO after extraction 2solvent is resolved, and one-level parsing pressure is 9MPa, one-level resolution temperature is 45 DEG C, and it is 5.5MPa that secondary resolves pressure, and secondary resolution temperature is 35 DEG C.Gaseous state CO after parsing 2with active carbon and discolour silica gel absorption in absorber, remain in gaseous state CO completely to remove not resolve 2in residues of pesticides, through absorption after gaseous state CO 2again for supercritical CO 2fluid extraction.
By measuring residues of pesticides content such as Rogor, carbendazim, phoxim, Aphox, Hostathion, Azodrin, cypermethrins in raw material and product, Rogor clearance 97.8%, carbendazim clearance 91.7%, phoxim clearance 95.8%, Aphox clearance 98.5%, Hostathion clearance 90.1%, Azodrin clearance 92.1%, cypermethrin clearance 93.1%, residues of pesticides removal effect is remarkable.
Embodiment 3: the method for this removal natural extract Pesticide Residues is to remove tomato red oleoresin Pesticide Residues, and concrete technology step is as described below.
At supercritical CO 2put into the metal packing of rectangular saddle ring stainless steel loose heap in extraction kettle (Guangzhou Mei Chen high and new separation technology company produces the overcritical device of 300L*2), addition is 3/5 of extraction kettle volume.Get 95kg tomato red oleoresin and add 35kg peanut oil (19:7), squeeze in extraction kettle; Adopt supercritical CO 2fluid carries out boosting extraction, and static extracting pressure is 15MPa, and the time is 20min, and dynamic extraction pressure is 27MPa, extracts 5.5 hours, extraction temperature 55 DEG C, CO 2flow is 1410L/h.CO after extraction 2solvent is resolved, and one-level parsing pressure is 8MPa, one-level resolution temperature is 45 DEG C, and it is 6MPa that secondary resolves pressure, and secondary resolution temperature is 35 DEG C.Gaseous state CO after parsing 2by active carbon and alumina adsorption in absorber, remain in gaseous state CO completely to remove not resolve 2in residues of pesticides, through absorption after gaseous state CO 2again for supercritical CO 2fluid extraction.
By measuring residues of pesticides content such as carbendazim, Ethodan, cypermethrin, fenvalerate, phoxim, Rogor, malathions in raw material and product, carbendazim clearance 97.1%, Ethodan clearance 92.3%, cypermethrin clearance 90.7%, fenvalerate clearance 95.4%, phoxim clearance 87.5%, Rogor clearance 92.1%, malathion clearance 96.8%, all reaches desirable residues of pesticides removal effect.
Embodiment 4: the method for this removal natural extract Pesticide Residues is to remove lutein oleoresin Pesticide Residues, and concrete technology step is as described below.
At supercritical CO 2put into the metal packing of rectangular saddle ring stainless steel loose heap in extraction kettle (Guangzhou Mei Chen high and new separation technology company produces the overcritical device of 300L*2), addition is 1/2 of extraction kettle volume.Get 65kg lutein oleoresin and add 65kg sunflower oil (1:1), squeeze in extraction kettle; Adopt supercritical CO 2fluid carries out boosting extraction, and static extracting pressure is 13MPa, and the time is 25min, and dynamic extraction pressure is 35MPa, extracts 10.0 hours, extraction temperature 75 DEG C, CO 2flow is 1310L/h.CO after extraction 2solvent is resolved, and one-level parsing pressure is 8.5MPa, one-level resolution temperature is 50 DEG C, and it is 6MPa that secondary resolves pressure, and secondary resolution temperature is 50 DEG C.Gaseous state CO after parsing 2by active carbon and alumina adsorption in absorber, remain in gaseous state CO completely to remove not resolve 2in residues of pesticides, through absorption after gaseous state CO 2again for supercritical CO 2fluid extraction.
By measuring residues of pesticides content such as Rogor, carbendazim, metrifonate, phoxim, Permanone, flucythrinate, killing logvalue, chlopyrifos in raw material and product, Rogor clearance 97.6%, carbendazim clearance 91.8%, metrifonate clearance 95.8%, phoxim clearance 88.8%, Permanone clearance 98.2%, flucythrinate clearance 89.7%, killing logvalue clearance 92.0%, chlopyrifos clearance 92.9%, all reaches desirable residues of pesticides removal effect.
Embodiment 5: the method for this removal natural extract Pesticide Residues is to remove linseed oil Pesticide Residues, and concrete technology step is as described below.
At supercritical CO 2put into the metal packing of rectangular saddle ring stainless steel loose heap in extraction kettle (Guangzhou Mei Chen high and new separation technology company produces the overcritical device of 300L*2), addition is 1/2 of extraction kettle volume.Get 130kg linseed oil (not adding edible oil), squeeze in extraction kettle; Adopt supercritical CO 2fluid carries out boosting extraction, and static extracting pressure is 14MPa, and the time is 20min, and dynamic extraction pressure is 20MPa, extracts 2.0 hours, extraction temperature 40 DEG C, CO 2flow is 1450L/h.CO after extraction 2solvent is resolved, and one-level parsing pressure is 7.5MPa, one-level resolution temperature is 30 DEG C, and it is 4MPa that secondary resolves pressure, and secondary resolution temperature is 30 DEG C.Gaseous state CO after parsing 2by active carbon and alumina adsorption in absorber, remain in gaseous state CO completely to remove not resolve 2in residues of pesticides, through absorption after gaseous state CO 2again for supercritical CO 2fluid extraction.
By measuring residues of pesticides content such as Rogor, carbendazim, phoxim, Aphox, Hostathion, Azodrin, cypermethrins in raw material and product, Rogor clearance 97.8%, carbendazim clearance 92.0%, phoxim clearance 95.7%, Aphox clearance 98.1%, Hostathion clearance 90.7%, Azodrin clearance 92.0%, cypermethrin clearance 92.6%, residues of pesticides removal effect is remarkable.

Claims (8)

1. remove a method for natural extract Pesticide Residues, it is characterized in that, the method step is: by the liquid natural extract containing residues of pesticides, or the liquid natural extract mixed with edible oil joins in extraction kettle; Irregular loose heap metal packing is provided with in described extraction kettle; Then adopt quiet dynamic bind Supercritical CO2 extraction to extract residues of pesticides in liquid natural extract, then resolve CO2 solvent, the natural extract removing residues of pesticides can be obtained;
Described static extracting pressure is 10 ~ 15MPa, and extraction time is 20 ~ 30min; Described dynamic extraction pressure is 20 ~ 35MPa, and extraction time is 2 ~ 10h; The extraction temperature of quiet dynamic extraction is 40 ~ 75 DEG C;
Described natural extract is partially fat-soluble natural extract, described residues of pesticides be organic phosphates, carbamates and pyrethroid pesticide remained in one or more.
2. the method for removal natural extract Pesticide Residues according to claim 1, is characterized in that: the weight ratio of described edible oil and liquid natural extract is 0 ~ 1:1.
3. the method for removal natural extract Pesticide Residues according to claim 1, is characterized in that: described edible oil is salad oil, sunflower oil, rapeseed oil or peanut oil.
4. the method for removal natural extract Pesticide Residues according to claim 1, is characterized in that: described irregular loose heap metal packing is Intalox metal tower packing, and amount of filler is 1/2 ~ 2/3 of extraction kettle volume.
5. the method for removal natural extract Pesticide Residues according to claim 4, is characterized in that: the material of described irregular loose heap metal packing is stainless steel.
6. the method for removal natural extract Pesticide Residues according to claim 1, is characterized in that, the described secondary that resolves to is resolved: it is 7.5 ~ 10MPa that one-level resolves pressure, and it is 4 ~ 6MPa that secondary resolves pressure, and resolution temperature is 30 ~ 50 DEG C.
7. any one according to claim 1-6 removes the method for natural extract Pesticide Residues, it is characterized in that: the gaseous state CO2 after described parsing after adsorbent, again for extraction.
8. the method for any one removal natural extract Pesticide Residues according to claim 7, is characterized in that: described adsorbent is active carbon, discolour silica gel or aluminium oxide.
CN201210193935.7A 2012-06-13 2012-06-13 Remove the method for natural extract Pesticide Residues Active CN102698466B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210193935.7A CN102698466B (en) 2012-06-13 2012-06-13 Remove the method for natural extract Pesticide Residues

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210193935.7A CN102698466B (en) 2012-06-13 2012-06-13 Remove the method for natural extract Pesticide Residues

Publications (2)

Publication Number Publication Date
CN102698466A CN102698466A (en) 2012-10-03
CN102698466B true CN102698466B (en) 2015-11-25

Family

ID=46891692

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210193935.7A Active CN102698466B (en) 2012-06-13 2012-06-13 Remove the method for natural extract Pesticide Residues

Country Status (1)

Country Link
CN (1) CN102698466B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103005005B (en) * 2013-01-16 2014-01-22 福建仙芝楼生物科技有限公司 Device and method for removing pesticide residue from plant by supercritical carbon dioxide
CN103305343B (en) * 2013-06-07 2015-02-18 佰香汇生物科技(厦门)有限公司 Method for removing pesticide residue in citrus essential oil
CN105838254B (en) * 2016-03-17 2018-08-21 晨光生物科技集团股份有限公司 It is a kind of to remove the remaining method of pesticide in capsicum oleoresin using molecular distillation
CN105777699B (en) * 2016-05-19 2017-11-17 湖北紫鑫生物科技有限公司 A kind of preparation method of non agricultural chemical residuum black rice anthocyanin
CN106689980A (en) * 2016-11-30 2017-05-24 西北大学 Method for removing pesticide and antibiotic residues from honey
CN107445924B (en) * 2017-07-31 2020-05-08 梅跃进 Subcritical pyrethrin extraction method
CN110813205A (en) * 2019-08-01 2020-02-21 铜仁学院 Mode for removing pesticide residues in natural product extract
CN111743932A (en) * 2020-08-12 2020-10-09 陕西瑞沃生物科技有限公司 Process for removing pesticide residue in ginseng plant extract
CN112544942A (en) * 2020-11-23 2021-03-26 南通奥凯生物技术开发有限公司 Method for preparing special powdered essence for pickled vegetables by deep processing and purification of natural extract
CN113698987A (en) * 2021-08-30 2021-11-26 山东三星玉米产业科技有限公司 Method for removing residual pesticide in corn oil

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1723969A (en) * 2005-07-18 2006-01-25 天津大学 Method for removing organic chlorine pesticide in ginseng by using supercritical carbon Co2
CN101530447A (en) * 2009-04-14 2009-09-16 中国农业大学 Method for extracting oleoresin rich in lutein in marigold by Supercritical CO2
CN101810658A (en) * 2010-05-07 2010-08-25 青岛东仁生物医药技术有限公司 Method for removing residual pesticide from ginseng
CN102358865A (en) * 2011-09-14 2012-02-22 山东科芮尔生物制品有限公司 Method of extracting Euphausia superba oil by using supercritical carbon dioxide

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1238208B (en) * 1989-10-12 1993-07-12 Enichem Augusta Spa PROCEDURE FOR THE EXTRACTION OF AN APOLAR SUBSTANCE FROM A LIQUID PHASE BY A SUPERCRITICAL GAS AND IN A PERFORATED PLATE EXTRACTOR.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1723969A (en) * 2005-07-18 2006-01-25 天津大学 Method for removing organic chlorine pesticide in ginseng by using supercritical carbon Co2
CN101530447A (en) * 2009-04-14 2009-09-16 中国农业大学 Method for extracting oleoresin rich in lutein in marigold by Supercritical CO2
CN101810658A (en) * 2010-05-07 2010-08-25 青岛东仁生物医药技术有限公司 Method for removing residual pesticide from ginseng
CN102358865A (en) * 2011-09-14 2012-02-22 山东科芮尔生物制品有限公司 Method of extracting Euphausia superba oil by using supercritical carbon dioxide

Also Published As

Publication number Publication date
CN102698466A (en) 2012-10-03

Similar Documents

Publication Publication Date Title
CN102698466B (en) Remove the method for natural extract Pesticide Residues
CN105400596A (en) Method for extracting green prickleyash oleoresin through subcritical dimethyl ether fluid
CN108998248A (en) A kind of industrial hemp floral leaf absolute oil preparation method rich in cannabidiol
CN103664988B (en) A kind of extraction and separation method of Artemisinin
CN102965198A (en) Method for extracting and processing lavender essential oil
CN103045371A (en) Preparation method for purifying essential oil and ursolic acid from wild ledum palustre in great khingan
CN101987809A (en) Production technology for extracting purified lycopene from tomato waste residue
CN103005005B (en) Device and method for removing pesticide residue from plant by supercritical carbon dioxide
CN106306991A (en) Method for removing pesticide residues and plasticizer from fructus momordicae extract at the same time
CN107279674A (en) A kind of biological food preservative
CN107418721A (en) Low arsenic krill fluid composition and preparation method thereof
CN103212102B (en) Multifunctional air purifying agent and preparation method thereof
DK2493337T3 (en) Method for producing an carnosolsyrerigt plant extract
Soetaredjo et al. Recovery of catechin and epicatechin from sago waste effluent: Study of kinetic and binary adsorption isotherm studies
Wang et al. Response surface optimization of supercritical carbon dioxide extraction of tea polyphenols from green tea scraps
CN102146317B (en) Method for extracting grape seed oil containing oligomeric proantho cyanidins (OPC)
CN101691451A (en) Method for preparing oil-soluble and fat-soluble caramel pigments with edible safety
CN102533446B (en) Method for removing furocoumarins from citrus essential oil
CN103351952B (en) Extraction method of magnolia sieboldii plant volatile oil
CN102031011B (en) Method for increasing pepper red pigment yield
CN104073359A (en) Process for extracting alpinia oxyphylla volatile oil through biological enzyme-supercritical fluid method
KR20130139037A (en) Removal method of off-flavor from seaweed using supercritical or subcritical carbon dioxide
CN104072468A (en) Proanthocyanidin extraction process from camellia seed hull
CN101830902A (en) Method for extracting sparteine
CN101921658A (en) Method for extracting volatile fragrant components from natural plant by using methyl bromide

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20121003

Assignee: Xinjiang Chenxi Pepper Industry Co.,Ltd.

Assignor: Chengguang Natural Pigment Group Co., Ltd.

Contract record no.: 2019990000135

Denomination of invention: Method for removing pesticide residues in natural extract

Granted publication date: 20151125

License type: Common License

Record date: 20190430