CN103351295A - 2-methyl-4-chlorophenoxyacetic acid preparation technology - Google Patents
2-methyl-4-chlorophenoxyacetic acid preparation technology Download PDFInfo
- Publication number
- CN103351295A CN103351295A CN2013102205656A CN201310220565A CN103351295A CN 103351295 A CN103351295 A CN 103351295A CN 2013102205656 A CN2013102205656 A CN 2013102205656A CN 201310220565 A CN201310220565 A CN 201310220565A CN 103351295 A CN103351295 A CN 103351295A
- Authority
- CN
- China
- Prior art keywords
- reaction
- cresol
- chlorophenoxyacetic acid
- sodium
- acid
- 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.)
- Granted
Links
Images
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a 2-methyl-4-chlorophenoxyacetic acid preparation technology. The technology is characterized in that a series of reactions comprising a condensation reaction of o-cresol, sodium hydroxide and water, a sodium modifying reaction of sodium hypochlorite, an acidulation reaction of hydrochloric acid and the like are carried out, and the pH value of 2-methyl-4-chlorophenoxyacetic acid in the acidulation reaction of hydrochloric acid is 5, so production and use demands are satisfied. The above improved technology substitutes a traditional technology utilizing pure benzene and chlorine, so the safety of 2-methyl-4-chlorophenoxyacetic acid in the preparation is increased. An o-cresol recovery operation is added for recovering o-cresol used in the above reaction, a platinum resistance thermometer arranged in a condensation reaction vessel is used for detecting the temperature in the condensation reaction vessel in the late stage of the above reactions, an enamel reaction vessel heating vessel body connected with the enamel reaction vessel is controlled when the temperature of the platinum resistance thermometer is higher than preset 90DEG C, and o-cresol for recovery is obtained through an enamel condenser connected with the enamel reaction vessel to improve the resource utilization rate.
Description
Technical field
The present invention relates to a kind of 2-first-4-chlorophenoxyacetic acid preparation technology, the 2-first that especially safety coefficient is high during a kind of processing and fabricating-4-chlorophenoxyacetic acid preparation technology.
Background technology
2-first-4-chlorophenoxyacetic acid is few because of its consumption, cost is low is one of weedicide kind general in the world wide always, simultaneously to have in the water solubleness very little for 2-first-4-chlorophenoxyacetic acid, be soluble in the organic solvents such as ethanol, benzene, but its sodium salt, amine salt are then very easily water-soluble, also can be used as in addition plant-growth regulator, be used for preventing the fruit drop such as tomato, cotton, pineapple and form s.m.p fruit etc.
The following method of the normal employing of the at present preparation of 2-first-4-chlorophenoxyacetic acid: at first, under the condition below 30 degrees centigrade, it is for subsequent use to utilize the reaction of Mono Chloro Acetic Acid and sodium hydroxide to obtain sodium chloroacetate, reacts ortho-cresol and sodium hydroxide to such an extent that ortho-cresol sodium is for subsequent use.Then, sodium chloroacetate is added dropwise in the ortho-cresol sodium reacts, add the purified petroleum benzin solvent after reaction finishes, then pass into chlorine, get liquid 2-first-4-chlorophenoxyacetic acid, last precipitation gets solid 2-first-4-chlorophenoxyacetic acid finished product.But adopt aforesaid method to prepare 2-first-4-chlorophenoxyacetic acid, owing to used purified petroleum benzin and chlorine in the process, purified petroleum benzin exists may be carcinogenic, may cause the infringement of heredity gene, highly inflammable, the risk that stimulates eyes and skin, chlorine is the yellowish green toxic gas that the intense stimulus smell is arranged, thereby in preparation process, exist because the people is damaged for the working suit that fault causes, and the consequence of the series reaction of the operator that cause poisoning etc.Ortho-cresol sodium exists the generation of the waste situation that untimely recovery causes in the preparation process of 2-first-4-chlorophenoxyacetic acid in addition.
Summary of the invention
Technical problem to be solved by this invention provides a kind of 2-first-4-chlorophenoxyacetic acid preparation technology, has the high characteristics of safety coefficient.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of 2-first-4-chlorophenoxyacetic acid preparation technology, its innovative point is to comprise the following steps:
A. it is for subsequent use Mono Chloro Acetic Acid to be dissolved in the water, and both blending ratios are 1: 1;
B. place the condensation reaction still to allocate ortho-cresol and sodium hydroxide, the allotment ratio of guaranteeing both is 5: 1, and temperature of reaction is 55 ℃-65 ℃, and optimum reacting time is 0.4h-0.6h, finally obtains the ortho-cresol sodium water solution;
C. after above-mentioned b reaction finishes, drip the chloroacetic acid solution that a obtains, guarantee that the allotment ratio of chloroacetic acid solution and ortho-cresol sodium water solution is 1.05: 1, temperature of reaction is 110 ℃-130 ℃, optimum reacting time is 3.5h-4.5h, finally obtains 2-methyl phenoxy acetic acid sodium;
D. after above-mentioned c reaction finishes, add the chlorine bleach liquor, guarantee that 2-methyl phenoxy acetic acid sodium and chlorine bleach liquor's allotment ratio is 1: 6, temperature of reaction is 25 ℃-35 ℃, finally obtains 2-first-4-chlorophenoxyacetic acid sodium;
E. after above-mentioned d reaction finishes, 2-first-4-chlorophenoxyacetic acid sodium is transferred to from the condensation reaction still in the acid out still, add hydrochloric acid this moment, and the ratio of guaranteeing 2-first-4-chlorophenoxyacetic acid sodium and hydrochloric acid is 1: 1, finally obtains 2-first-4-chlorophenoxyacetic acid;
Further, the optimal reaction temperature of ortho-cresol and sodium hydroxide reaction is 60 ℃ among the step b, and optimum reacting time is 0.5h;
Further, the optimal reaction temperature of chloroacetic acid solution and ortho-cresol sodium water solution is 120 ℃ among the step c, and optimum reacting time is 4h;
Further, 2-methyl phenoxy acetic acid sodium and chlorine bleach liquor's optimum temps is 30 ℃ in the steps d;
Further, 2 first that obtain-4-chlorophenoxyacetic acid is liquid state among the step e;
Further, also increasing behind the described step e has baking operation, and the 2-first-4-chlorophenoxyacetic acid after the oven dry is through packing final acquisition finished product;
Further, have additional the ortho-cresol recovery process between described step c and the steps d, the frock of described ortho-cresol recovery process mainly comprises the enamel reaction still that links to each other with condensation reaction still pipeline and the enamel condenser that links to each other with the enamel reaction still air outlet;
Further, be provided with platinum-resistance thermometer in the described condensation reaction still, the default minimum temperature of described platinum-resistance thermometer is 90 ℃, and described platinum-resistance thermometer feedback end links to each other with follow-up enamel reaction still steam heating control end;
The invention has the advantages that: by above-mentioned improvement technique, replace in the traditional technology and utilize purified petroleum benzin and chlorine, thus the security when increase 2-first-4-chlorophenoxyacetic acid prepares.The ortho-cresol that is used in addition reaction, in the reaction later stage, by being arranged on the temperature in the platinum-resistance thermometer detection kettle in the condensation reaction still, when it is higher than default 90 ℃, the enamel reaction still heating kettle that control links to each other with the condensation reaction still, finally by the ortho-cresol that the enamel condenser acquisition that links to each other with enamel reaction still need be reclaimed, improve the utilization ratio of resource.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is a kind of 2-first of the present invention-4-chlorophenoxyacetic acid preparation technology's process flow sheet.
Fig. 2 is the structural representation of equipment component among a kind of 2-first of the present invention-4-chlorophenoxyacetic acid preparation technology.
Embodiment
Structural representation shown in Figure 2 mainly comprises condensation reaction still 1, enamel reaction still 2, enamel condenser 3, platinum-resistance thermometer 4.
A kind of 2-first of the present invention-4-chlorophenoxyacetic acid preparation technology mainly may further comprise the steps:
A. it is for subsequent use Mono Chloro Acetic Acid to be dissolved in the water, and both blending ratios are 1: 1.
B. place the condensation reaction still to allocate ortho-cresol and sodium hydroxide, the allotment ratio of guaranteeing both is 5: 1, and temperature of reaction is 55 ℃-65 ℃, and optimum reacting time is 0.4h-0.6h, finally obtains the ortho-cresol sodium water solution.
C. after above-mentioned b reaction finishes, drip the chloroacetic acid solution that a obtains, guarantee that the allotment ratio of chloroacetic acid solution and ortho-cresol sodium water solution is 1.05: 1, temperature of reaction is 110 ℃-130 ℃, optimum reacting time is 3.5h-4.5h, finally obtains 2-methyl phenoxy acetic acid sodium.
D. after above-mentioned c reaction finishes, add the chlorine bleach liquor, guarantee that 2-methyl phenoxy acetic acid sodium and chlorine bleach liquor's allotment ratio is 1: 6, temperature of reaction is 25 ℃-35 ℃, finally obtains 2-first-4-chlorophenoxyacetic acid sodium.
E. after above-mentioned d reaction finishes, 2-first-4-chlorophenoxyacetic acid sodium is transferred to from the condensation reaction still in the acid out still, add hydrochloric acid this moment, and the ratio of guaranteeing 2-first-4-chlorophenoxyacetic acid sodium and hydrochloric acid is 1: 1, finally obtains 2-first-4-chlorophenoxyacetic acid.
For obtaining the optimum response product, the optimal reaction temperature of ortho-cresol and sodium hydroxide reaction is 60 ℃ in step b, and optimum reacting time is 0.5h.
For obtaining the optimum response product, the optimal reaction temperature of chloroacetic acid solution and ortho-cresol sodium water solution is 120 ℃ in step c, and optimum reacting time is 4h.
For obtaining the optimum response product, 2-methyl phenoxy acetic acid sodium and chlorine bleach liquor's optimum temps is 30 ℃ in steps d.
For obtaining the optimum response product, 2 first that obtain-4-chlorophenoxyacetic acid is liquid state in step e.
For obtaining the optimum response product, also increasing behind described step e has baking operation, and 2 first after the oven dry-4-chlorophenoxyacetic acid is through packing final acquisition finished product.
For taking full advantage of resource, between step c and steps d, have additional the ortho-cresol recovery process, the frock of ortho-cresol recovery process mainly comprises the enamel reaction still 2 that links to each other with condensation reaction still 1 pipeline and the enamel condenser 3. that links to each other with enamel reaction still 2 air outlets is provided with platinum-resistance thermometer 4 in condensation reaction still 1, platinum-resistance thermometer 4 default minimum temperatures are 90 ℃, these platinum-resistance thermometer 4 feedback ends link to each other with follow-up enamel reaction still 2 steam heating control ends, thereby the temperature in the condensation reaction still surpasses 90 ℃ of control enamel reaction still steam heating, reclaims unnecessary ortho-cresol finally by the enamel condenser condenses.
Shown in the schema of Fig. 1,2-first-4-chlorophenoxyacetic acid is mainly through some row reactions such as ortho-cresol, sodium hydroxide and water condensation reaction, the inferior natridization reaction of clorox, the acid precipitation reaction of hydrochloric acid, finally the pH value of 2-first-4-chlorophenoxyacetic acid is 5 in the acid precipitation reaction of hydrochloric acid, thereby satisfies the production and application demand.
Claims (8)
1. 2-first-4-chlorophenoxyacetic acid preparation technology is characterized in that comprising the following steps:
A. it is for subsequent use Mono Chloro Acetic Acid to be dissolved in the water, and both blending ratios are 1: 1;
B. place the condensation reaction still to allocate ortho-cresol and sodium hydroxide, the allotment ratio of guaranteeing both is 5: 1, and temperature of reaction is 55 ℃-65 ℃, and optimum reacting time is 0.4h-0.6h, finally obtains the ortho-cresol sodium water solution;
C. after above-mentioned b reaction finishes, drip the chloroacetic acid solution that a obtains, guarantee that the allotment ratio of chloroacetic acid solution and ortho-cresol sodium water solution is 1.05: 1, temperature of reaction is 110 ℃-130 ℃, optimum reacting time is 3.5h-4.5h, finally obtains 2-methyl phenoxy acetic acid sodium;
D. after above-mentioned c reaction finishes, add the chlorine bleach liquor, guarantee that 2-methyl phenoxy acetic acid sodium and chlorine bleach liquor's allotment ratio is 1: 6, temperature of reaction is 25 ℃-35 ℃, finally obtains 2-first-4-chlorophenoxyacetic acid sodium;
E. after above-mentioned d reaction finishes, 2-first-4-chlorophenoxyacetic acid sodium is transferred to from the condensation reaction still in the acid out still, add hydrochloric acid this moment, and the ratio of guaranteeing 2-first-4-chlorophenoxyacetic acid sodium and hydrochloric acid is 1: 1, finally obtains 2-first-4-chlorophenoxyacetic acid.
2. a kind of 2-first according to claim 1-4-chlorophenoxyacetic acid preparation technology is characterized in that: the optimal reaction temperature of ortho-cresol and sodium hydroxide reaction is 60 ℃ among the step b, and optimum reacting time is 0.5h.
3. a kind of 2-first according to claim 1-4-chlorophenoxyacetic acid preparation technology, it is characterized in that: the optimal reaction temperature of chloroacetic acid solution and ortho-cresol sodium water solution is 120 ℃ among the step c, optimum reacting time is 4h.
4. a kind of 2-first according to claim 1-4-chlorophenoxyacetic acid preparation technology, it is characterized in that: 2 methyl phenoxy acetic acid sodium and chlorine bleach liquor's optimum temps is 30 ℃ in the steps d.
5. a kind of 2-first according to claim 1-4-chlorophenoxyacetic acid preparation technology, it is characterized in that: obtaining 2-first-4-chlorophenoxyacetic acid among the step e is liquid state.
6. a kind of 2-first according to claim 5-4-chlorophenoxyacetic acid preparation technology is characterized in that: also increasing behind the described step e has baking operation, and the 2-first-4-chlorophenoxyacetic acid after the oven dry is through packing final acquisition finished product.
7. a kind of 2-first according to claim 1-4-chlorophenoxyacetic acid preparation technology, it is characterized in that: have additional the ortho-cresol recovery process between described step c and the steps d, the frock of described ortho-cresol recovery process mainly comprises the enamel reaction still that links to each other with condensation reaction still pipeline and the enamel condenser that links to each other with the enamel reaction still air outlet.
8. a kind of 2-first according to claim 1-4-chlorophenoxyacetic acid preparation technology, it is characterized in that: be provided with platinum-resistance thermometer in the described condensation reaction still, the default minimum temperature of described platinum-resistance thermometer is 90 ℃, and described platinum-resistance thermometer feedback end links to each other with follow-up enamel reaction still steam heating control end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310220565.6A CN103351295B (en) | 2013-06-04 | 2013-06-04 | A kind of 2-first-4-chlorophenoxyacetic acid preparation technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310220565.6A CN103351295B (en) | 2013-06-04 | 2013-06-04 | A kind of 2-first-4-chlorophenoxyacetic acid preparation technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103351295A true CN103351295A (en) | 2013-10-16 |
| CN103351295B CN103351295B (en) | 2016-12-28 |
Family
ID=49307733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310220565.6A Active CN103351295B (en) | 2013-06-04 | 2013-06-04 | A kind of 2-first-4-chlorophenoxyacetic acid preparation technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103351295B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365975A (en) * | 2016-08-29 | 2017-02-01 | 张家强 | Method for synthesizing high-content 2-methyl-4-chloric acid and sodium salt |
| CN108530284A (en) * | 2018-04-08 | 2018-09-14 | 湘潭大学 | The preparation method of o-methyl-benzene fluoroacetic acid |
| CN113173844A (en) * | 2021-05-11 | 2021-07-27 | 宁夏格瑞精细化工有限公司 | Preparation method of 2-methyl-4-chlorophenoxyacetic acid |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CS226909B1 (en) * | 1981-08-21 | 1984-04-16 | Tuleja Juraj | Method of preparing 4-chloro-2-methylphenoxyalkanic acids |
| PL174569B1 (en) * | 1994-04-22 | 1998-08-31 | Inst Przemyslu Organiczego | Method of obtaining 2-methyl-4-chlorophenoxyacetic acid /mcpa/ |
| CN1618785A (en) * | 2003-11-20 | 2005-05-25 | 张沈昌 | Production technology of 2-methyl-4-chloro-sodium phenoxy acetate |
-
2013
- 2013-06-04 CN CN201310220565.6A patent/CN103351295B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CS226909B1 (en) * | 1981-08-21 | 1984-04-16 | Tuleja Juraj | Method of preparing 4-chloro-2-methylphenoxyalkanic acids |
| PL174569B1 (en) * | 1994-04-22 | 1998-08-31 | Inst Przemyslu Organiczego | Method of obtaining 2-methyl-4-chlorophenoxyacetic acid /mcpa/ |
| CN1618785A (en) * | 2003-11-20 | 2005-05-25 | 张沈昌 | Production technology of 2-methyl-4-chloro-sodium phenoxy acetate |
Non-Patent Citations (1)
| Title |
|---|
| 蒙炎生: "2甲4氯合成方法的改进", 《安徽化工》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365975A (en) * | 2016-08-29 | 2017-02-01 | 张家强 | Method for synthesizing high-content 2-methyl-4-chloric acid and sodium salt |
| CN108530284A (en) * | 2018-04-08 | 2018-09-14 | 湘潭大学 | The preparation method of o-methyl-benzene fluoroacetic acid |
| CN113173844A (en) * | 2021-05-11 | 2021-07-27 | 宁夏格瑞精细化工有限公司 | Preparation method of 2-methyl-4-chlorophenoxyacetic acid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103351295B (en) | 2016-12-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104448075B (en) | For the method preparing heat stability Kynoar | |
| CN103351295A (en) | 2-methyl-4-chlorophenoxyacetic acid preparation technology | |
| CN103539962A (en) | Method for preparing low-amine rubber anti-aging agent TMQ | |
| CN104649898B (en) | A kind of solvent method continuous carbonization produces beta naphthal, the method and device of coproduction 2,3 acid | |
| CN100534975C (en) | Method for producing 2,6-dichloro-4-trifluoromethylaniline | |
| CN104925968A (en) | Salt-tolerant and high-temperature-resistant antisludging agent and preparation method thereof | |
| CN112457198A (en) | Industrial production method of 2, 6-difluoroaniline | |
| CN102093253A (en) | Preparation method of benzoxylamine hydrochloride compounds | |
| CN102295561A (en) | Preparation method of 2-ethylhexyl (4-chloro-2-methylphenoxy)acetate | |
| CN103787918A (en) | Production technology for synthesizing bromoxynil | |
| CN105859563B (en) | A kind of production method of 2,5 dichloroaniline | |
| CN103205516A (en) | Method and device for desalting blast furnace gas | |
| CN104003905A (en) | Method for producing N-cyanoethylaniline and N,N-dicyanoethylaniline by adopting one-step cleaning process | |
| CN110668712A (en) | Method for improving quality of calcium hydroxide | |
| CN101798278A (en) | Method for preparing thiodipropionic acid | |
| CN104447402B (en) | The preparation method of m-trifluoromethyl benzene acetonitrile | |
| CN105837621B (en) | A kind of after-treatment device and method of phosphate flame retardant | |
| CN101863732B (en) | Synthesis method of end-group alkyne | |
| CN103012475B (en) | A kind of preparation method of glyphosate | |
| CN106977408A (en) | The preparation method of paramachinine leuco base | |
| CN105384964A (en) | Method for processing waste residues in high content rubber antioxidant TMQ production process | |
| CN105688896A (en) | Method for preparing palladium-carbon catalyst for producing nilox resin | |
| CN104072379B (en) | A kind of preparation method of 2,6 dichloro-4,4 5-trifluoromethylaniline | |
| CN103275163B (en) | The extracting method that tea saponin oozes out urged by a kind of tensio-active agent | |
| CN104926652B (en) | The preparation method of linalyl acetate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: 2-methyl-4-chlorophenoxyacetic acid preparation technology Effective date of registration: 20190430 Granted publication date: 20161228 Pledgee: CITIC financing Company Limited by Guarantee in Dongzhi County Pledgor: ANHUI XINGLONG CHEMICAL Co.,Ltd. Registration number: 2019340000231 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20200426 Granted publication date: 20161228 Pledgee: CITIC financing Company Limited by Guarantee in Dongzhi County Pledgor: ANHUI XINGLONG CHEMICAL Co.,Ltd. Registration number: 2019340000231 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: 2-methyl-4-chlorophenoxyacetic acid preparation technology Effective date of registration: 20200525 Granted publication date: 20161228 Pledgee: CITIC financing Company Limited by Guarantee in Dongzhi County Pledgor: ANHUI XINGLONG CHEMICAL Co.,Ltd. Registration number: Y2020980002445 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20211103 Granted publication date: 20161228 Pledgee: CITIC financing Company Limited by Guarantee in Dongzhi County Pledgor: ANHUI XINGLONG CHEMICAL Co.,Ltd. Registration number: Y2020980002445 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A preparation process of 2-methyl-4-chlorophenoxyacetic acid Effective date of registration: 20211110 Granted publication date: 20161228 Pledgee: CITIC financing Company Limited by Guarantee in Dongzhi County Pledgor: ANHUI XINGLONG CHEMICAL Co.,Ltd. Registration number: Y2021980012240 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220421 Granted publication date: 20161228 Pledgee: CITIC financing Company Limited by Guarantee in Dongzhi County Pledgor: ANHUI XINGLONG CHEMICAL Co.,Ltd. Registration number: Y2021980012240 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A preparation process of 2-methyl-4-chlorophenoxyacetic acid Effective date of registration: 20220427 Granted publication date: 20161228 Pledgee: CITIC financing Company Limited by Guarantee in Dongzhi County Pledgor: ANHUI XINGLONG CHEMICAL Co.,Ltd. Registration number: Y2022980004788 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230331 Granted publication date: 20161228 Pledgee: CITIC financing Company Limited by Guarantee in Dongzhi County Pledgor: ANHUI XINGLONG CHEMICAL Co.,Ltd. Registration number: Y2022980004788 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A preparation process of 2-methyl-4-chlorophenoxyacetic acid Effective date of registration: 20230412 Granted publication date: 20161228 Pledgee: CITIC financing Company Limited by Guarantee in Dongzhi County Pledgor: ANHUI XINGLONG CHEMICAL Co.,Ltd. Registration number: Y2023980037857 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20161228 Pledgee: CITIC financing Company Limited by Guarantee in Dongzhi County Pledgor: ANHUI XINGLONG CHEMICAL Co.,Ltd. Registration number: Y2023980037857 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |