CN204644234U - A kind of n-butyl acrylate drain oil recovery equipment - Google Patents
A kind of n-butyl acrylate drain oil recovery equipment Download PDFInfo
- Publication number
- CN204644234U CN204644234U CN201520233289.1U CN201520233289U CN204644234U CN 204644234 U CN204644234 U CN 204644234U CN 201520233289 U CN201520233289 U CN 201520233289U CN 204644234 U CN204644234 U CN 204644234U
- Authority
- CN
- China
- Prior art keywords
- unit
- light
- still
- condenser
- ether
- 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
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses a kind of n-butyl acrylate drain oil recovery equipment, comprise depolymerization, esterification, thick steaming, neutralize, take off light, the de-de-ether unit weighing and take off light gained light constituent, the utility model n-butyl acrylate drain oil recovery equipment by de-ether process is carried out to the light constituent obtained in de-light industry sequence and recovery in esterification unit, removing the moisture in light constituent simultaneously, avoiding the too high levels because applying mechanically n-butyl ether in light constituent and the technological deficiency causing product purity to decline.
Description
Technical field
The utility model relates to acrylate waste oil and reclaims field, is specifically related to a kind of n-butyl acrylate drain oil recovery equipment.
Background technology
N-butyl acrylate is colourless liquid, water insoluble, miscible in ethanol, ether.N-butyl acrylate is mainly used as organic synthesis
intermediate, tackiness agent, emulsifying agent.N-butyl acrylate has harm to health, by sucking, eating, percutaneous absorbtion.Its steam or mist have hormesis to eyes, mucous membrane and respiratory tract.Poisoning manifestations has burning sensation, coughs, pants, laryngitis, breathe hard, have a headache, nausea and vomiting.N-butyl acrylate waste oil component is n-butyl acrylate, vinylformic acid, propyl carbinol, water and butoxy n-butyl acrylate, and the composition of vinylformic acid waste oil is acrylic acid dimer, water, vinylformic acid.Therefore, the recovery of industry acrylate generally comprises depolymerization, esterification, de-light, de-heavy four steps, in the light constituent of the gained after de-light process, main component is propyl carbinol, water, in order to realize making full use of of propyl carbinol material, adopting and applying mechanically to esterification and must process means in prior art.But also containing a small amount of n-butyl ether in light constituent, n-butyl ether is that in depolymerization operation, bimolecular propyl carbinol dewaters generation under acid conditions, the light constituent propyl carbinol boiling point 117.7 DEG C removed in de-light industry sequence, the boiling point of n-butyl ether is 142 DEG C, the boiling point of product n-butyl acrylate is 145 DEG C, at reduced pressure conditions, n-butyl ether and n-butyl acrylate are not easily separated, if continuous seepage does not carry out de-ether process to the light constituent that de-light industry sequence produces, but directly apply mechanically to esterification, along with de-component gently applies mechanically increasing of number of times, the continuous cumulative rises of n-butyl ether content in product n-butyl acrylate can be caused, the final purity affecting n-butyl acrylate.
Utility model content
The purpose of this utility model is the defect overcoming prior art, provides one to be exclusively used in vinylformic acid waste oil and n-butyl acrylate waste oil for reactant, produces the n-butyl acrylate drain oil recovery equipment of the positive butyl ester of high-purity propylene acid.
For achieving the above object, technical scheme of the present invention is a kind of n-butyl acrylate drain oil recovery equipment, it is characterized in that, comprises depolymerization unit, esterification unit, slightly steams unit, neutralisation unit, de-light unit, de-heavy unit; Described de-light constituent between light unit and esterification unit is applied mechanically on loop and is provided with de-ether unit.
Preferred technical scheme is, described depolymerization unit comprises the depolymerization still, depolymerization condenser, the depolymerization quantizer that connect successively; Described esterification unit comprises esterifying kettle, the top vapor outlet port of esterifying kettle is communicated with esterification quantizer with esterification condensator successively by pipeline, the reaction solution discharge port of esterifying kettle is connected with the thick steaming tower opening for feed slightly steaming unit, and the thick steam steaming tower distillates mouth and mixed liquid bath and communicate with thick evaporation condenser and thick steaming by pipeline successively; Described neutralisation unit comprise with slightly steam mix liquid bath communicate in and still, in be communicated with the discharge port of the still de-light still with de-light unit, the top of de-light still is provided with light constituent and distillates mouth, the light constituent of de-light still distillates mouth and is communicated with de-condenser light, the bottom discharge port of de-light still is communicated with the finished product still of de-heavy unit, the top of described finished product still is provided with finished product vapor outlet port, and described finished product vapor outlet port is connected with finished pot by de-heavy condenser.
In order to reduce recovery light constituent in the content of n-butyl ether, preferred technical scheme is, described de-ether unit comprises de-ether still, the opening for feed of described de-ether still is communicated with the discharge port of de-condenser light, first discharge port of de-ether still is communicated with the first de-ether condenser, second discharge port of de-ether still is communicated with the second de-ether condenser, and the second de-ether condenser is communicated with esterifying kettle by storage tank.
Apply mechanically to realize material, preferred technical scheme is, described thick steaming tower is communicated with depolymerization still respectively by raffinate pipeline with the bottom raffinate discharge port of finished product still.
In order to as far as possible reduce vinylformic acid polymerization reaction take place in rectifying, preferred technical scheme is, described depolymerization unit, slightly steams in unit, de-light unit, de-heavy unit and is respectively arranged with that stopper is molten joins groove; The depolymerization stopper of described depolymerization unit is molten joins groove and forms material loop by the bottom discharge port of pipeline and depolymerization condenser and top opening for feed; The thick steaming stopper of described thick steaming unit is molten joins groove and forms material loop by the bottom discharge port of pipeline and thick evaporation condenser and top opening for feed; The de-light stopper of described de-light unit is molten joins groove and forms material loop by the bottom discharge port of pipeline and de-condenser light and top opening for feed; The molten groove of joining of the de-heavy stopper of described de-heavy unit forms material loop by pipeline and the bottom discharge port and top opening for feed taking off heavy condenser.
Advantage of the present utility model and beneficial effect are:
The utility model n-butyl acrylate waste oil recovery process by de-ether process is carried out to the light constituent obtained in de-light industry sequence and recovery in esterification step, remove the moisture in light constituent simultaneously, avoid the too high levels because applying mechanically n-butyl ether in light constituent and the not easily separated technological deficiency causing the finished product purity to decline, reduce the water entering esterifying kettle simultaneously as far as possible, ensure that propyl carbinol and acrylic acid reversible esterification are carried out to the direction generating n-butyl acrylate, detect product n-butyl acrylate purity is not less than 99%.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model n-butyl acrylate drain oil recovery equipment.
In figure: 1, depolymerization unit; 1-1, depolymerization still; 1-2, depolymerization condenser; 1-3, depolymerization quantizer; 1-4, depolymerization stopper is molten joins groove; 2, esterification unit; 2-1, esterifying kettle; 2-2, esterification condensator; 2-3, esterification quantizer; 2-4, return tank; 3, slightly unit is steamed; 3-1, slightly steam tower; 3-2, thick evaporation condenser; 3-3, thick steaming mix liquid bath; 3-4, thick steam that stopper is molten joins groove; 4, neutralisation unit; 4-1, in and still; 5, de-light unit; 5-1, de-light still; 5-2, de-condenser light; 5-3, de-light stopper is molten joins groove; 6, de-heavy unit; 6-1, finished product still; 6-2, de-heavy condenser; 6-3, de-heavy stopper is molten joins groove; 7, de-ether unit; 7-1, de-ether still; 7-2, the first de-ether condenser; 7-3, the second de-ether condenser.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is further described.Following examples only for clearly the technical solution of the utility model being described, and can not limit protection domain of the present utility model with this.
The n-butyl acrylate drain oil recovery equipment of embodiment, comprises depolymerization unit 1, esterification unit 2, thick steaming unit 3, neutralisation unit 4, de-light unit 5, de-heavy unit 6, depolymerization unit 1 comprises the depolymerization still 1-1, depolymerization condenser 1-2, the depolymerization quantizer 1-3 that connect successively, esterification unit 2 comprises esterifying kettle 2-1, the top vapor outlet port of esterifying kettle 2-1 is communicated with esterification quantizer 2-3 with esterification condensator 2-2 successively by pipeline, the reaction solution discharge port of esterifying kettle 2-1 is connected with the thick steaming tower 3-1 opening for feed slightly steaming unit 3, and the thick steam steaming tower 3-1 distillates mouth and mixed liquid bath 3-3 and communicate with thick evaporation condenser 3-2 and thick steaming by pipeline successively, neutralisation unit 4 comprise with slightly steam mix liquid bath communicate in and still 4-1, in be communicated with the discharge port of the still 4-1 de-light still 5-1 with de-light unit 5, the top of de-light still 5-1 is provided with light constituent and distillates mouth, the light constituent of de-light still 5-1 distillates mouth and is communicated with de-condenser light 5-2, the bottom discharge port of de-light still 5-1 is communicated with the finished product still 6-1 of de-heavy unit 6, the top of finished product still 6-1 is provided with finished product vapor outlet port, finished product vapor outlet port is connected with finished pot by de-heavy condenser 6-2, retrieving arrangement also comprises de-ether unit, the opening for feed of de-ether unit is connected with de-condenser light, light constituent recovery after de-ether is in esterification unit.
De-ether unit 7 comprises de-ether still 7-1, the opening for feed of de-ether still 7-1 is communicated with the discharge port of de-condenser light 5-2, first discharge port of de-ether still 7-1 is communicated with the first de-ether condenser 7-2, second discharge port of de-ether still 7-1 is communicated with the second de-ether condenser 7-3, and the second de-ether condenser 7-3 is communicated with esterifying kettle 2-1 by storage tank.
Thick steaming tower 3-1 is communicated with depolymerization still 1-1 respectively by raffinate pipeline with the bottom raffinate discharge port of finished product still 6-1.
The organic phase discharge port of esterification quantizer 2-3 is communicated with esterifying kettle 2-1 by return tank 2-4.
Depolymerization unit 1, thick steaming in unit 3, de-light unit 5, de-heavy unit 6 are respectively arranged with that stopper is molten joins groove; The depolymerization stopper of depolymerization unit 1 is molten joins groove 1-4 and forms material loop by the bottom discharge port of pipeline and depolymerization condenser 1-2 and top opening for feed; The thick steaming stopper of thick steaming unit 3 is molten joins groove 3-4 and forms material loop by the bottom discharge port of pipeline and thick evaporation condenser 3-2 and top opening for feed; The de-light stopper of de-light unit 5 is molten joins groove 5-3 and forms material loop by the bottom discharge port of pipeline and de-condenser light 5-2 and top opening for feed; The molten groove 6-3 that joins of the de-heavy stopper of de-heavy unit 6 forms material loop by pipeline and the bottom discharge port and top opening for feed taking off heavy condenser 6-2.
De-ether unit also comprises that de-ether stopper is molten joins groove, and de-ether stopper is molten joins groove and take off the bottom discharge port of ether condenser by pipeline and second and top opening for feed forms material loop.
The raw material of n-butyl acrylate waste oil recovery process is n-butyl acrylate waste oil and vinylformic acid waste oil, the component of n-butyl acrylate excessive fuel consumption is n-butyl acrylate 51.6%, vinylformic acid 5.59%, propyl carbinol 1.14%, water 1.11% and butoxy n-butyl acrylate 40.56%, also containing a small amount of 3-butoxy n-butyl propionate, the component of vinylformic acid waste oil is acrylic acid dimer 38.52%, water 5.8%, vinylformic acid 55.68%
S1: depolymerization, n-butyl acrylate waste oil, vinylformic acid waste oil, esterified acid catalyst and propyl carbinol are added depolymerization unit, intensification reaches 210 DEG C, depolymerization acrylic acid dimer, esterification and inevitably side reaction are carried out in insulation, n-butyl acrylate in depolymerization still, propyl carbinol, vinylformic acid and water mixed vapour distillate, mixed vapour, through condensation, stratification, obtains organic phase depolymerization batch mixing; In depolymerization still, raffinate is concentrated and is proceeded to waste collection still, and still internal jacket leads to steam insulation, then delivers to incinerator burning with jacket pipe insulation.
The main reaction of depolymerization operation is the depolymerization of a part acrylic acid dimer is that two molecule vinylformic acid, vinylformic acid and propyl carbinol esterification generate n-butyl acrylate, 3-butoxy n-butyl propionate ether bond rupture generates n-butyl acrylate and propyl carbinol, and side reaction is that two molecule propyl carbinol dehydrations generate a part n-butyl ether;
S2: esterification, organic phase depolymerization batch mixing, propyl carbinol, vinylformic acid, esterified acid catalyst, stopper are pumped in esterifying kettle, be warming up to 120 DEG C, esterification is carried out at negative pressure-0.063MPa, obtain esterification liquid, in esterifying kettle, the mixed vapour of propyl carbinol and water is through condensation, stratification, reclaims propyl carbinol recovery in esterification step;
In esterification step, main reaction is that propyl carbinol and acroleic acid esterification generate n-butyl acrylate, and side reaction is that n-butyl acrylate and water addition reaction generate the positive butyl ester of 2 hydroxy propanoic acid;
S3: slightly steam, esterification liquid is warming up to 140 DEG C at reduced pressure conditions, under negative pressure-0.0975MPa, insulation is thick steams, and the thick gained mixed vapour that steams reclaims slightly steam n-butyl acrylate mixed solution and slightly steam raffinate through condenser through condensation, and the thick raffinate recovery that steams is in depolymerization operation;
S4: neutralization, by liquid caustic soda with thick steam n-butyl acrylate mixed solution, lower 45 DEG C of normal pressure carries out that neutralization reaction removing is thick steams tosic acid in n-butyl acrylate mixed solution and vinylformic acid, and reaction terminates rear stratification, obtains water layer and organic layer;
Neutralization reaction products therefrom is sodium acrylate and paratoluenesulfonic acid sodium salt, is dissolved in water layer and is separated.
S5: de-light, S4 gained organic phase, at 125 DEG C, removes light constituent propyl carbinol, water, the n-butyl ether of three-phase azeotropic in negative pressure-0.0975MPa rectifying, must take off light rear batch mixing, light constituent is through condensation, layering, and organic phase recovery is to esterif iotacation step;
Containing unreacted propyl carbinol and by product n-butyl ether in esterifying liquid; Propyl carbinol, water, n-butyl ether can form ternary azeotropic, azeotropic point 90.6 DEG C; Propyl carbinol and water can form binary azeotropic, azeotropic point 93 DEG C; N-butyl ether and and water can form binary azeotropic, azeotropic point 94.1 DEG C; Propyl carbinol, n-butyl ether can form binary azeotropic, azeotropic point 117.6 DEG C.
S6: de-heavy, de-gently rear batch mixing is de-heavy through intensification rectification under vacuum, distillates steam through condensation, backflow, obtains n-butyl acrylate finished product and take off to weigh raffinate, and de-heavy raffinate recovery is in depolymerization operation;
S7: de-ether, pumps into de-ether still by finished product ethanol, recovery ethanol, benzene (water entrainer), stopper and n-butyl acrylate light constituent.Jacket steam heating makes de-ether temperature in the kettle progressively be raised to 80 DEG C, and steam in early stage (mainly ethanol, benzene, water, two (just) butyl ether) is by rectifying after the first de-ether condenser condenses; Later stage steam (mainly BA, propyl carbinol, two (just) butyl ether, water) is collected by the second de-ether condenser, layering, recovery after upper oil phase rectifying cooling.
Depolymerization, thick steaming, de-light, de-weight average adopt condenser condenses; Add the depolymerization inhibitor solution that organic phase depolymerization batch mixing and stopper mix on depolymerization condenser top in depolymehzation step, the solubility of depolymerization inhibitor solution is 1400ppm, stopper used is thiodiphenylamine and N, N-copper dibutyldithiocarbamate, the weight of thiodiphenylamine accounts for 70 ~ 80% of stopper gross weight; Add the thick steaming inhibitor solution that slightly steaming n-butyl acrylate mixed solution and stopper mix on thick evaporation condenser top in thick steaming step, the solubility of thick steaming inhibitor solution is 1200ppm, stopper used is thiodiphenylamine and N, N-copper dibutyldithiocarbamate, the weight of thiodiphenylamine accounts for 60 ~ 75% of stopper gross weight; Add the de-light inhibitor solution that de-gently rear batch mixing and stopper mix during de-fox trot is rapid on de-condenser light top, the solubility of de-light inhibitor solution is 1000ppm, and stopper used is thiodiphenylamine; Add the de-heavy inhibitor solution that n-butyl acrylate finished product mixes with stopper in de-heavy step on de-heavy condenser top, the solubility taking off light inhibitor solution is 700ppm, and stopper used is MEHQ.The concentration of stopper is determined according to acrylic acid content in institute's condensing steam.
Containing n-butyl acrylate and micro-propyl carbinol, stopper and other impurity in embodiment gained finished product, vinylformic acid finished product purity is 99.41%; And not adopting the n-butyl acrylate recovery process of de-ether process after more than 5 times light constituent recoveries, the purity of final finished is all less than 98%.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (5)
1. a n-butyl acrylate drain oil recovery equipment, is characterized in that, comprises depolymerization unit, esterification unit, slightly steams unit, neutralisation unit, de-light unit, de-heavy unit; Described de-light constituent between light unit and esterification unit is applied mechanically on loop and is provided with de-ether unit.
2. n-butyl acrylate drain oil recovery equipment according to claim 1, is characterized in that, described depolymerization unit comprises the depolymerization still, depolymerization condenser, the depolymerization quantizer that connect successively; Described esterification unit comprises esterifying kettle, the top vapor outlet port of esterifying kettle is communicated with esterification quantizer with esterification condensator successively by pipeline, the reaction solution discharge port of esterifying kettle is connected with the thick steaming tower opening for feed slightly steaming unit, and the thick steam steaming tower distillates mouth and mixed liquid bath and communicate with thick evaporation condenser and thick steaming by pipeline successively; Described neutralisation unit comprise with slightly steam mix liquid bath communicate in and still, in be communicated with the discharge port of the still de-light still with de-light unit, the top of de-light still is provided with light constituent and distillates mouth, the light constituent of de-light still distillates mouth and is communicated with de-condenser light, the bottom discharge port of de-light still is communicated with the finished product still of de-heavy unit, the top of described finished product still is provided with finished product vapor outlet port, and described finished product vapor outlet port is connected with finished pot by de-heavy condenser.
3. n-butyl acrylate drain oil recovery equipment according to claim 2, it is characterized in that, described de-ether unit comprises de-ether still, the opening for feed of described de-ether still is communicated with the discharge port of de-condenser light, first discharge port of de-ether still is communicated with the first de-ether condenser, second discharge port of de-ether still is communicated with the second de-ether condenser, and the second de-ether condenser is communicated with esterifying kettle by storage tank.
4. n-butyl acrylate drain oil recovery equipment according to claim 1, is characterized in that, described thick steaming tower is communicated with depolymerization still respectively by raffinate pipeline with the bottom raffinate discharge port of finished product still.
5. n-butyl acrylate drain oil recovery equipment according to claim 2, is characterized in that, described depolymerization unit, slightly steams in unit, de-light unit, de-heavy unit and is respectively arranged with that stopper is molten joins groove; The depolymerization stopper of described depolymerization unit is molten joins groove and forms material loop by the bottom discharge port of pipeline and depolymerization condenser and top opening for feed; The thick steaming stopper of described thick steaming unit is molten joins groove and forms material loop by the bottom discharge port of pipeline and thick evaporation condenser and top opening for feed; The de-light stopper of described de-light unit is molten joins groove and forms material loop by the bottom discharge port of pipeline and de-condenser light and top opening for feed; The molten groove of joining of the de-heavy stopper of described de-heavy unit forms material loop by pipeline and the bottom discharge port and top opening for feed taking off heavy condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520233289.1U CN204644234U (en) | 2015-04-17 | 2015-04-17 | A kind of n-butyl acrylate drain oil recovery equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520233289.1U CN204644234U (en) | 2015-04-17 | 2015-04-17 | A kind of n-butyl acrylate drain oil recovery equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204644234U true CN204644234U (en) | 2015-09-16 |
Family
ID=54096996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520233289.1U Active CN204644234U (en) | 2015-04-17 | 2015-04-17 | A kind of n-butyl acrylate drain oil recovery equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204644234U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104844456A (en) * | 2015-04-17 | 2015-08-19 | 江苏新东风化工科技有限公司 | n-butylacrylate waste oil recovery process and n-butylacrylate waste oil recovery apparatus |
| CN113121348A (en) * | 2021-03-15 | 2021-07-16 | 江苏新东风化工科技有限公司 | Deetherizing process for producing n-butyl acrylate |
-
2015
- 2015-04-17 CN CN201520233289.1U patent/CN204644234U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104844456A (en) * | 2015-04-17 | 2015-08-19 | 江苏新东风化工科技有限公司 | n-butylacrylate waste oil recovery process and n-butylacrylate waste oil recovery apparatus |
| CN113121348A (en) * | 2021-03-15 | 2021-07-16 | 江苏新东风化工科技有限公司 | Deetherizing process for producing n-butyl acrylate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104844456A (en) | n-butylacrylate waste oil recovery process and n-butylacrylate waste oil recovery apparatus | |
| CN103044257B (en) | Terylene waste material produces alcoholysis method and the apparatus system of dioctyl terephthalate | |
| CN103736384A (en) | Treatment process of glyphosate hydrolyzing tail gas | |
| CN103827072A (en) | Method for recovering acetic acid | |
| CN105111079A (en) | Method and device for separating acetic acid sec-butyl ester and sec-butyl alcohol | |
| CN204644234U (en) | A kind of n-butyl acrylate drain oil recovery equipment | |
| CN110862301B (en) | Sec-butyl alcohol refining method and device | |
| CN104557511A (en) | Method for recovering acrylic acid from acrylic acid water | |
| CN108530295A (en) | A kind of technique of the acrylic acid N-butyl from waste oil | |
| CN108484406A (en) | A kind of Isooctyl acrylate monomer waste oil recovery process | |
| CN205528530U (en) | Apparatus for producing of two different butyl esters of 1, 2 - cyclohexane dioctyl phthalate | |
| CN109516901A (en) | A kind of synthetic method of 2,2 '-dichloroether | |
| CN106892798A (en) | Process for preparing dichloropropanol | |
| CN106518620B (en) | A kind of method and device preparing sec-butyl alcohol | |
| CN104072365A (en) | Preparation method of dioctyl terephthalate (DOTP) | |
| CN102992930B (en) | Recovery process and separation device of toluene solvent in production process of alpha-acetyl-gamma butyrolactone | |
| CN203007176U (en) | Alcoholysis device system for preparing dioctyl terephthalate from Dacron wastes | |
| CN103102369B (en) | A kind of production method of diethyl ethylphosphate | |
| CN201686638U (en) | Aluminium triethyl recovery device | |
| CN107986962A (en) | A kind of method that acetoacetic ester is recycled in the bottoms from acetoacetic ester | |
| CN208071616U (en) | Cyclic phosphonic acid anhydrides recycle preparation facilities | |
| CN103772329B (en) | Method for simultaneous extraction and recovery of furfural and acetic acid from furfural stripping steam condensate | |
| CN101723832A (en) | Method for compounding allyl amyl glycolate | |
| CN105237354B (en) | The recoverying and utilizing method of glycerin chlorination raffinate | |
| CN208532644U (en) | A kind of 1,2- pentanediol process units |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 223002 the southern side of Li Wan Road, the northern side of Yan Du road and the west side of Huaian Road, Hongze Salt Chemical Development Zone, Huaian, Jiangsu. Patentee after: The new east wind Chemical Industry Science Co., Ltd in Jiangsu Address before: 223002 the southern side of Li Wan Road, the northern side of yantiu road and the west side of Huaian Road, Jiangsu salt chemical development zone. Patentee before: The new east wind Chemical Industry Science Co., Ltd in Jiangsu |
|
| CP02 | Change in the address of a patent holder |