CN107400228B - Equipment system for producing polyester polyol and working method thereof - Google Patents
Equipment system for producing polyester polyol and working method thereof Download PDFInfo
- Publication number
- CN107400228B CN107400228B CN201710601361.5A CN201710601361A CN107400228B CN 107400228 B CN107400228 B CN 107400228B CN 201710601361 A CN201710601361 A CN 201710601361A CN 107400228 B CN107400228 B CN 107400228B
- Authority
- CN
- China
- Prior art keywords
- adipic acid
- nitrogen
- kettle
- batching kettle
- batching
- 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
- 229920005906 polyester polyol Polymers 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 14
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims abstract description 100
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 75
- 239000001361 adipic acid Substances 0.000 claims abstract description 53
- 235000011037 adipic acid Nutrition 0.000 claims abstract description 50
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 38
- 238000006243 chemical reaction Methods 0.000 claims abstract description 35
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- AVNFTTFOKCOKRE-UHFFFAOYSA-N [N].C(CCCCC(=O)O)(=O)O Chemical compound [N].C(CCCCC(=O)O)(=O)O AVNFTTFOKCOKRE-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 11
- 238000003860 storage Methods 0.000 claims abstract description 10
- 238000004806 packaging method and process Methods 0.000 claims abstract description 7
- 239000000428 dust Substances 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 238000005303 weighing Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 4
- 238000010926 purge Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 230000003139 buffering effect Effects 0.000 abstract 2
- 239000004814 polyurethane Substances 0.000 description 5
- 229920002635 polyurethane Polymers 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- -1 small molecule polyols Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
- C08G63/785—Preparation processes characterised by the apparatus used
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/88—Post-polymerisation treatment
- C08G63/90—Purification; Drying
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyesters Or Polycarbonates (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
An equipment system for producing polyester polyol and a working method thereof comprise a nitrogen circulation system, a screw conveyor, a batching kettle, a reaction kettle and a finished product storage tank which are connected in sequence, wherein the batching kettle is also connected with an alcohol metering tank and a vacuum system; the nitrogen circulation system comprises an adipic acid nitrogen system, an adipic acid finished product gas delivery system, a three-way valve, a buffering bin and a nitrogen fine filter which are sequentially connected, wherein the nitrogen fine filter is further connected with the adipic acid nitrogen system, the adipic acid finished product gas delivery system and the three-way valve are both connected with an adipic acid packaging system, and a bag-type dust remover is arranged in the buffering bin. The invention has the characteristics of safety, applicability and the like, has good popularization and practical value, and can generate good economic benefit after wide popularization and application.
Description
Technical Field
The invention relates to the field of polyester polyol production, in particular to an equipment system for producing polyester polyol and a working method thereof.
Background
Polyester polyols are typically formed by condensing organic dicarboxylic acids with small molecule polyols. Because the molecule contains more polar groups such as ester groups, amino groups and the like, the cohesive strength and the adhesive force are strong, and the adhesive has higher strength and wear resistance. Aliphatic (multi-finger adipic acid polyester) polyester diols are commonly used in the production of cast polyurethane elastomers, thermoplastic polyurethane elastomers, microcellular polyurethane soles, PU leather resins, polyurethane adhesives, polyurethane inks, color pastes, textile coatings, and the like.
At home and abroad in the polyurethane sole stock solution industry, adipic acid is always hoisted by crane and manually added in the process of proportioning in the production process of polyester polyol. The intermittent feeding mode has the defects of large labor capacity, low efficiency, more dust, serious equipment corrosion, more potential safety hazards and the like, and meanwhile, a large amount of sundries, air and the like are brought into the reaction kettle due to the addition of manual kettle cover opening, so that the product quality is reduced to a certain extent.
Disclosure of Invention
The invention aims to provide an equipment system for producing polyester polyol and a working method thereof, which aim to solve the technical problem that the existing production technology is easy to cause product pollution; and solves the technical problems of difficult control and poor operation environment in the prior production technology.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an equipment system for producing polyester polyol, characterized in that: the device comprises a nitrogen circulation system, a screw conveyer, a batching kettle, a reaction kettle and a finished product storage tank which are connected in sequence, wherein the batching kettle is also connected with an alcohol metering tank and a vacuum system;
the nitrogen circulation system comprises an adipic acid nitrogen system, an adipic acid finished product gas delivery system, a three-way valve, a buffer bin and a nitrogen fine filter which are sequentially connected, wherein the nitrogen fine filter is further connected with the adipic acid nitrogen system.
Further preferably, the adipic acid product gas delivery system and the three-way valve are both connected with an adipic acid packaging system.
Further, a bag-type dust remover is arranged in the buffer bin.
Further, the adipic acid nitrogen system comprises a nitrogen supplementing device and an adipic acid production device.
Further, a material pump for pumping the mixed liquid in the batching kettle to the reaction kettle for reaction is arranged between the batching kettle and the reaction kettle.
Further, the temperature in the batching kettle is 102-110 ℃, and the internal pressure is 95-101Kpa.
Further, a relay fan is arranged in the nitrogen fine filter.
In addition, the pressure difference in the buffer bin is 1-3Kpa, and a weighing device is arranged on the buffer bin.
More preferably, the batching kettle is provided with a batching kettle weighing system.
A method of operating an equipment system for producing polyester polyols, comprising the steps of:
step one, setting a reaction kettle: the preparation process setting is carried out on the reaction kettle 4-6 hours in advance;
step two, adding alcohol into a batching kettle: metering alcohol according to a formula, adding the alcohol into a batching kettle, and stirring the alcohol by using a pneumatic batching kettle;
step three, adding adipic acid into a batching kettle: reversing the three-way valve to ensure that the adipic acid finished gas delivery system turns to a buffer bin, and enabling adipic acid and nitrogen to enter the buffer bin, wherein the adipic acid is delivered by a screw conveyor and then added into a corresponding batching kettle, a vacuum system is started to control the pressure in the kettle in the adding process, and the nitrogen returns to an adipic acid nitrogen system after passing through the buffer bin and cleaning the adipic acid in a pipeline and then being treated by a nitrogen fine filter;
step four, starting a material pumping pump: the mixed materials in the batching kettle are pumped into the corresponding reaction kettle to react, and the finished product is conveyed to a finished product storage tank after the reaction is finished, so that the equipment system for producing the polyester polyol is finished.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
the invention is directly connected with the adipic acid product production line, does not need forklift transportation and travelling crane material preparation links, reduces labor intensity, reduces production cost, improves production efficiency and effectively improves operation environment. The invention realizes the seamless butt joint of adipic acid production and polyester polyol production in the production process of polyester polyol with zero dust and zero pollution, and reduces the hidden trouble of safety and environmental protection to the minimum. According to the invention, raw adipic acid is sent to the reaction kettle of a production workshop from an adipic acid finished product gas delivery system in the production process of polyester polyol, the whole process is zero-contact, zero-leakage and accurate in control (accurate control of a weighing module), and the product quality is effectively improved. The invention is initiated in the international and domestic industries, has great significance, and can bring great social and economic benefits to the country.
The invention has the characteristics of safety, applicability and the like, has good popularization and practical value, and can generate good economic benefit after wide popularization and application.
Drawings
FIG. 1 is a schematic diagram of the structure of an equipment system for producing a polyester polyol according to the present invention.
Reference numerals: 1-adipic acid nitrogen system; 2-adipic acid finished product gas delivery system; 3-three-way valve; 4-buffering bin; 5-screw conveyor; 6-a batching kettle; 7-a reaction kettle; 8-a finished product storage tank; a 9-alcohol metering tank; 10-a vacuum system; 11-nitrogen fine filter; a 12-adipic acid packaging system.
Detailed Description
The present invention will be further described below in order to make the technical means, innovative features, achieved objects and effects achieved by the present invention easy to understand.
The examples described herein are specific embodiments of the present invention, which are intended to illustrate the inventive concept, are intended to be illustrative and exemplary, and should not be construed as limiting the invention to the embodiments and scope of the invention. In addition to the embodiments described herein, those skilled in the art can adopt other obvious solutions based on the disclosure of the claims and specification of the present application, including those adopting any obvious substitutions and modifications to the embodiments described herein.
An equipment system for producing polyester polyol is shown in fig. 1, and comprises a nitrogen circulation system, a screw conveyor 5, a batching kettle 6, a reaction kettle 7 and a finished product storage tank 8 which are sequentially connected, wherein the batching kettle 6 is further connected with an alcohol metering tank 9 and a vacuum system 10, the nitrogen circulation system comprises an adipic acid nitrogen system 1, an adipic acid finished product gas delivery system 2, a three-way valve 3, a buffer bin 4 and a nitrogen fine filter 11 which are sequentially connected, and the nitrogen fine filter 11 is further connected with the adipic acid nitrogen system 1. A cloth bag dust remover is arranged in the buffer bin 4. The adipic acid finished product pneumatic conveying system 2 and the three-way valve 3 are connected with the adipic acid packaging system 12. Adipic acid nitrogen system 1 includes a nitrogen make-up unit and an adipic acid production unit. A material pump for pumping the mixed solution in the batching kettle 6 into the reaction kettle 7 for reaction is arranged between the batching kettle 6 and the reaction kettle 7, the temperature in the batching kettle 6 is 102-110 ℃, the internal pressure is 95-101Kpa, a relay fan is arranged in the nitrogen fine filter 11, the pressure difference in the buffer bin 4 is 1-3Kpa, a weighing device is arranged on the relay fan, and a batching kettle weighing system is arranged on the batching kettle 6.
A method of operating an equipment system for producing polyester polyols, comprising the steps of:
step one, setting a reaction kettle 7: 4-6 hours in advance, setting a batching program for the reaction kettle 7;
step two, adding alcohol into a batching kettle 6: metering alcohol according to a formula, adding the alcohol into a batching kettle 6, and after the stirring function of the batching kettle 6 is started, setting and starting an adipic acid adding program according to the condition of a reaction kettle;
step three, adding adipic acid into a batching kettle 6: reversing the three-way valve 3 to enable the adipic acid finished gas conveying system 2 to turn to the buffer bin 4, enabling adipic acid and nitrogen to enter the buffer bin 4, conveying the adipic acid through the screw conveyor 5 and then adding the adipic acid into the corresponding batching kettle 6, starting the vacuum system 10 to control the pressure in the kettle in the adding process, enabling the nitrogen to pass through the buffer bin 4 and clear the adipic acid in a pipeline, and returning the adipic acid and nitrogen system 1 after being treated through the nitrogen fine filter 11;
step four, starting a material pumping pump: the mixture in the batching kettle 6 is pumped into a corresponding reaction kettle 7 for reaction, and according to the display of a weighing system of the batching kettle 6, when the required adipic acid weight reaches the requirement, a three-way valve is switched to an adipic acid packaging line, nitrogen enters a batching kettle conveying system for purging at the moment, adipic acid zero buffer storage in the pipeline is realized through nitrogen purging, and the adipic acid zero buffer storage in the pipeline is conveyed to a finished product storage tank 8 after the reaction in the reaction kettle 7 is finished, so that the equipment system for producing polyester polyol is finished.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (1)
1. The working method of an equipment system for producing polyester polyol is characterized in that the equipment system comprises a nitrogen circulation system, a screw conveyer (5), a batching kettle (6), a reaction kettle (7) and a finished product storage tank (8) which are sequentially connected, wherein the batching kettle (6) is also connected with an alcohol metering tank (9) and a vacuum system (10), and adipic acid adding program setting and starting are carried out according to the condition of the reaction kettle after the stirring function of the batching kettle (6) is started;
the nitrogen circulation system comprises an adipic acid nitrogen system (1), an adipic acid finished product gas delivery system (2), a three-way valve (3), a buffer bin (4) and a nitrogen fine filter (11) which are sequentially connected, wherein the nitrogen fine filter (11) is also connected with the adipic acid nitrogen system (1); the adipic acid finished product pneumatic conveying system (2) and the three-way valve (3) are connected with the adipic acid packaging system (12); a cloth bag dust remover is arranged in the buffer bin (4); the adipic acid nitrogen system (1) comprises a nitrogen supplementing device and an adipic acid production device; a material pump for pumping the mixed liquid in the batching kettle (6) into the reaction kettle (7) for reaction is arranged between the batching kettle (6) and the reaction kettle (7); the temperature in the batching kettle (6) is 102-110 ℃, and the internal pressure is 95-101Kpa; a relay fan is arranged in the nitrogen fine filter (11); the pressure difference in the buffer bin (4) is 1-3Kpa, and a weighing device is arranged on the buffer bin; a batching kettle weighing system is arranged on the batching kettle (6);
the working method of the equipment system comprises the following steps:
step one, a reaction kettle (7) is arranged: 4-6 hours in advance, carrying out batching program setting on the reaction kettle (7);
step two, adding alcohol into a batching kettle (6): metering alcohol according to a formula, adding the alcohol into a batching kettle (6), and after starting the stirring function of the batching kettle (6), setting and starting an adipic acid adding program according to the condition of a reaction kettle;
step three, adding adipic acid into a batching kettle (6): reversing the three-way valve (3) to enable the adipic acid finished product gas delivery system (2) to turn to the buffer bin (4), enabling adipic acid and nitrogen to enter the buffer bin (4), conveying the adipic acid through the screw conveyor (5) and then adding the adipic acid into the corresponding batching kettle (6), starting the vacuum system (10) to control the pressure in the kettle in the adding process, and returning the adipic acid to the adipic acid nitrogen system (1) after the nitrogen passes through the buffer bin (4) and cleans the adipic acid in the pipeline and then is processed through the nitrogen fine filter (11);
step four, starting a material pumping pump: the mixture in the batching kettle (6) is pumped into a corresponding reaction kettle (7) for reaction, a weighing system of the batching kettle (6) shows that when the required adipic acid weight reaches the requirement, a three-way valve (3) commutates an adipic acid packaging system (12), nitrogen enters a batching kettle conveying system for purging at the moment, the pipeline is purged by the nitrogen to realize zero buffer of adipic acid in the pipeline, the reaction in the reaction kettle (7) is completed and then conveyed to a finished product storage tank (8), and accordingly, the equipment system for producing the polyester polyol is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710601361.5A CN107400228B (en) | 2017-07-21 | 2017-07-21 | Equipment system for producing polyester polyol and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710601361.5A CN107400228B (en) | 2017-07-21 | 2017-07-21 | Equipment system for producing polyester polyol and working method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107400228A CN107400228A (en) | 2017-11-28 |
| CN107400228B true CN107400228B (en) | 2023-05-16 |
Family
ID=60401088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710601361.5A Active CN107400228B (en) | 2017-07-21 | 2017-07-21 | Equipment system for producing polyester polyol and working method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107400228B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109078598A (en) * | 2018-09-18 | 2018-12-25 | 重庆华峰化工有限公司 | Polyester polyol synthesis system and synthetic method |
| CN112646104A (en) * | 2020-12-30 | 2021-04-13 | 南通紫琅生物医药科技有限公司 | Preparation process of polyurethane resin |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE831772C (en) * | 1952-11-18 | 1952-02-18 | Bayer Ag | Process for the production of high molecular weight crosslinked plastics |
| JP2004051729A (en) * | 2002-07-18 | 2004-02-19 | Asahi Kasei Chemicals Corp | Process for producing shaped product of glycolic acid copolymer |
| JP4223245B2 (en) * | 2002-08-07 | 2009-02-12 | ユニチカ株式会社 | Biodegradable polyester resin composition, method for producing the same, and foam and molded product obtained therefrom |
| TWI255821B (en) * | 2003-01-22 | 2006-06-01 | Asahi Kasei Chemicals Corp | Polytrimethylene terephthalate resin and method for production thereof |
| KR20080105217A (en) * | 2007-05-30 | 2008-12-04 | 이창열 | Using black soybean bio-active skin of powder for the little crystal bio-active of anthocyanin powder manufacturing and equipment |
| KR100888882B1 (en) * | 2008-09-23 | 2009-03-17 | 김창현 | Process for producing poly trimethylene terephthalate |
| CN202687388U (en) * | 2012-07-18 | 2013-01-23 | 中国天辰工程有限公司 | Conveying system for industrial solid adipic acid |
| CN102775583A (en) * | 2012-08-02 | 2012-11-14 | 烟台万华超纤股份有限公司 | Hydrolysis-resistant polyester polyol and preparation process thereof |
| CN103694458B (en) * | 2013-12-11 | 2016-06-01 | 高鼎精细化工(昆山)有限公司 | A kind of biological poly ester polyol and its preparation method and application |
| CN203683736U (en) * | 2014-01-22 | 2014-07-02 | 淮安锦纶化纤有限公司 | Fusing and melting system capable of continuously conducting feeding |
| CN106633018B (en) * | 2016-12-30 | 2019-06-11 | 上海聚友化工有限公司 | Polyester polyol continuous production processes and device |
| CN206337204U (en) * | 2016-12-30 | 2017-07-18 | 上海聚友化工有限公司 | A kind of PEPA continuous production device |
| CN106674495A (en) * | 2017-02-20 | 2017-05-17 | 浙江罗星实业有限公司 | Production technology of polyester polyol and production system for polyester polyol |
| CN106823793A (en) * | 2017-04-01 | 2017-06-13 | 平顶山市普恩科技有限公司 | A kind of removing means and removal methods of adipic acid nitrogen oxide in tail gas |
| CN207091330U (en) * | 2017-07-21 | 2018-03-13 | 重庆华峰化工有限公司 | A kind of change system for producing PEPA |
-
2017
- 2017-07-21 CN CN201710601361.5A patent/CN107400228B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107400228A (en) | 2017-11-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107400228B (en) | Equipment system for producing polyester polyol and working method thereof | |
| CN205201850U (en) | Loading attachment is used in masterbatch production | |
| CN204726725U (en) | The bilateral automatic blanking bagging apparatus of a kind of amargosite | |
| CN105969298A (en) | Production process for acid silicone sealant | |
| CN103230756B (en) | A kind of continuous producing method of mill base and automatic assembly line | |
| CN204638057U (en) | A kind of priming paint process units | |
| CN109626305A (en) | Rust remover canning equipment | |
| CN102675608A (en) | Method for preparing material special for polybutylene terephthalate (PBT) optical fiber loose tubes | |
| CN106637990A (en) | Impregnation formula and preparation method | |
| CN108312354B (en) | Construction process for gypsum mortar mixing and spraying construction | |
| CN207091330U (en) | A kind of change system for producing PEPA | |
| CN103721623A (en) | Automatic adding system for liquid additives and application method | |
| CN104369282A (en) | Large-scale efficient automatic batching system | |
| CN202029310U (en) | Color paste adding device for high-pressure foaming machine | |
| CN204656397U (en) | A kind of device of normal temperature synthesis polycarboxylate water-reducer powder | |
| CN113818890A (en) | Double-slurry storage, pulping and conveying integrated system in tunnel for shield construction and using method | |
| CN211190058U (en) | Real mineral varnish base material feeding unit | |
| CN207838777U (en) | Spandex prepolymer homogeneous agitating device | |
| CN204149356U (en) | A kind of extensive efficient automatic batching system | |
| CN208308407U (en) | Polyether polyhydroxy tertiary amine cement grinding aid filling apparatus | |
| CN208229900U (en) | A kind of mixing polyurethane agitating device circulating production system | |
| CN206045939U (en) | A kind of flexible paint process units | |
| CN102582056A (en) | Production line of neutral and acidic stick bands | |
| CN101885953B (en) | Acid-resisting rubber reinforcing and metal binding agent and preparation method thereof | |
| CN203876071U (en) | Automatic liquid feeding control system of plastic mixing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231220 Address after: 200120 3rd floor, building 16, 2555 xiupu Road, Pudong New Area, Shanghai Patentee after: Huafeng Group Shanghai Engineering Co.,Ltd. Patentee after: CHONGQING HUAFON CHEMICAL CO.,LTD. Address before: 408000 Huafeng Industrial Park, Baitao Chemical Park, Fuling District, Chongqing Patentee before: CHONGQING HUAFON CHEMICAL CO.,LTD. |
|
| TR01 | Transfer of patent right |