CN1019910C - Method for preventing acrylic acid production device from being corroded - Google Patents
Method for preventing acrylic acid production device from being corroded Download PDFInfo
- Publication number
- CN1019910C CN1019910C CN 90100180 CN90100180A CN1019910C CN 1019910 C CN1019910 C CN 1019910C CN 90100180 CN90100180 CN 90100180 CN 90100180 A CN90100180 A CN 90100180A CN 1019910 C CN1019910 C CN 1019910C
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- CN
- China
- Prior art keywords
- titanium
- equipment
- acrylic acid
- corrosion
- corroded
- 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.)
- Expired - Fee Related
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- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 12
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000010936 titanium Substances 0.000 claims abstract description 30
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 28
- 238000005260 corrosion Methods 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 22
- 230000007797 corrosion Effects 0.000 claims abstract description 21
- 239000010935 stainless steel Substances 0.000 claims abstract description 13
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 13
- 229910000975 Carbon steel Inorganic materials 0.000 claims abstract description 11
- 239000010962 carbon steel Substances 0.000 claims abstract description 11
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 27
- 150000001875 compounds Chemical group 0.000 claims description 6
- CYKMNKXPYXUVPR-UHFFFAOYSA-N [C].[Ti] Chemical compound [C].[Ti] CYKMNKXPYXUVPR-UHFFFAOYSA-N 0.000 claims description 2
- 239000002131 composite material Substances 0.000 abstract description 3
- 229910001200 Ferrotitanium Inorganic materials 0.000 abstract description 2
- 239000002904 solvent Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 230000003245 working effect Effects 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004191 allura red AC Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Physical Or Chemical Processes And Apparatus (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention provides a method for preventing an acrylic acid production device from being corroded. It is characterized in that the equipment contacting with corrosive media or parts thereof adopt titanium materials or composite structures of titanium, carbon steel, titanium and stainless steel. The device has strong corrosion resistance and is durable. The continuous operation time in the production is long, the equipment replacement cost and the material consumption are saved, the production stop loss is reduced, and the product quality is favorably ensured. Avoid the pollution and accident hidden trouble of the leakage and leakage to the environment caused by the corrosion of the equipment.
Description
The present invention relates to a kind of acrylic acid production device corroding method that prevents.
Acrylic acid production device by absorption tower [T-101], gas stripping column [T-102], extraction tower [T-103], solvent recovery tower [T-104], separated from solvent tower [T-105], cut light tower [T-106], take off heavies column [T-107], rectifying tower [T-108], acetic acid separated tower [T-109] and accessory interchanger, jar, pump, valve, pipeline etc. are formed separately.Working medium vinylformic acid and acetic acid in this device are strong corrosive media.Therefore our expectation prevents the method for this corrosion of equipment, prolongs the work-ing life of this device.Make the continuous operation of this device energy long period, save the equipment replacement expense and reduce the loss that stops production and cause.
In prior art, the equipment that method for production of acrylic acid (Japanese Patent No. 759459, the special public clear 49-24898 of notification number) adopts adopts stainless steel at corrosion location, and special stainless steel NASI44M is adopted at corrosion especially severe position.As separated from solvent tower [T-105] totally five ten layers of column plate.The 30 layers of column plate in bottom adopt NASI44M, and all the other 20 layers of column plates adopt Ultralow Carbon Stainless Steel SuS316L.This tower used only 296 days, the column plate seriously corroded.The hole diameter of sieve (perforated) plate φ 12mm of column plate has been corroded and has become the hole of φ 15mm.Column plate thickness corrodes attenuation by 3mm, and thickness only has 1.2mm.Interchanger E-1371 and for example, former employing special stainless steel NASI44M uses the damage that promptly is corroded in 2 years 07 months.Adopt common stainless steel 1Cr18Ni9, using promptly was corroded in one month penetrates.Since acrylic acid production device contact strong corrosive media, and existing technology equipment therefor is limit because of its erosion resistance the subject of knowledge and the object of knowledge, work-ing life is short, and the replacement cycle of equipment is short.The frequent replacing of equipment heightens manufacturing, replacing, the installation costs of equipment.Also make stopping production often, the loss that stops production increases.Because equipment corrosion easily causes evaporating, emitting, dripping or leaking of liquid or gas, contaminate environment, and the hidden danger that causes the accident.
The object of the present invention is to provide a kind of acrylic acid production device corroding method that prevents.Improve material and structure that this device adopts, prolong its work-ing life, reduce the stopping production loss that causes because of the equipment of changing corrosion damage, reduce equipment purchasing, installation, the required manpower and materials consumption of replacing.
The object of the present invention is achieved like this, and the position that the tower of vinylformic acid refining plant, jar, interchanger, pump, valve, pipeline etc. contact with vinylformic acid, acetic acid all adopts the titanium material to make.Can adopt pure titanium, also can adopt the composition board of titanium and stainless composition board or titanium and carbon steel to make.The one side titanium plate that composition board contacts with vinylformic acid or acetic acid, what one side did not contact vinylformic acid, acetic acid in addition is available stainless steel or carbon steel.Titanium has favorable mechanical performance and physicals, and machine-shaping property is also better, is convenient to make processing.The titanium material has the superior corrosion resistance energy, and erosion resistance is factor affecting such as heat-treated, moulding, welding not generally, have the ability that avoids spot corrosion and intergranular corrosion.Need use rare gas element such as argon shield during the welding of titanium material.The titanium material is low weight, though the price of titanium material own is more expensive, uses titanium material producing apparatus more similar than the facility investment of the same race of stainless material.
The present invention can prolong the work-ing life of this device owing to provide and prevent the acrylic acid production device corroding method, has reduced more exchange device number of times, economizes on the use of funds and makes, changes the manpower and materials consumption of erecting equipment.Prolonged the continuous operation time of this device.Reduced the loss that stops production and bring.Reduce production costs.Raise the efficiency.This device satisfies former processing requirement.Because the impurity of having avoided the slave unit internal corrosion to get off is sneaked in the product, helps guaranteeing the quality of product.
Accompanying drawing 1 is the composition diagram of acrylic acid production device.This device absorbs, captures vinylformic acid by absorption tower [T-101] water, after entering gas stripping column [T-102] and removing unabsorbed all gases, [T-103] carries out the extracting of vinylformic acid and acetic acid with solvent at extraction tower, takes out raffinate and therefrom reclaims solvent by solvent recovery tower [T-104].Extract enters separated from solvent tower [T-105] and carries out separated from solvent.Then at cut light tower [T-106] separating acetic acid, enter the refining vinylformic acid of rectifying tower [T-108] after heavies column [T-107] is removed heavy constituent and use taking off for polymerization.Acetic acid separated tower [T-109] is from the distillate acrylic acid of [T-106].
Accompanying drawing 2 is sectional views of an embodiment-interchanger main body of proposition according to the present invention.Be illustrated as a tubular heat exchange main body, be welded into the interchanger main body with tube sheet by case body [3], tubulation [8].Hand hole [2], [4], steam-in [7], thermometer mouth [9] are arranged on the heat exchanger shell [3].Upper and lower tube sheet adopts composite structure: the lower tubesheet of carbon steel [1] is compound with the following composition board [10] that the titanium material is manufactured.The upper tubesheet of carbon steel [5] is compound with the last composition board [6] that the titanium material is done.Tubulation [8] is made by the titanium material.All the other housings are manufactured by carbon steel.
Embodiment 1: the separated from solvent tower [T-105] in the acrylic acid production device adopts stainless steel to make seriously corroded in the use.Five layers of column plate of orlop are corrosion damage, and it is big that the sieve plate hole becomes, the attenuation of column plate thickness, the column plate big area that has perforation.Will the most following five layers of column plate and annex all change the titanium material into and make, use and do not see evidence of corrosion in 2 years.
Embodiment 2: the interchanger in the acrylic acid production device [E-1371] adopts stainless steel NASI44M to use and promptly damaged because of heavy corrosion in 2 years seven months.Use stainless steel 1Cr18Ni9 instead, use an i.e. corrosion in month to penetrate.Changed three interchanger in nine months altogether.Adopting the interchanger shown in the accompanying drawing 2, because of being steam between this Tube Sheet of Heat Exchanger, is corrosive medium in the pipe, and tubulation adopts the titanium material to make.Upper and lower tube sheet adopts composite structure.The carbon steel sheet thick by the thick titanium plate of 10mm and 40mm is composited.The one side of crevice corrosion medium is manufactured for the titanium material, and all the other housings etc. are manufactured by carbon steel.Argon arc welding under the protection of inert gas is adopted in the welding of titanium material.This interchanger used 2 years, did not see evidence of corrosion.Other interchanger [E-138], [E-129] also use instead with the interchanger of [E-1371] same material and structure respond well.Other interchanger are according to the different situations of its crevice corrosion medium, and the part parts can adopt the titanium carbon steel compound, also can adopt the compound or industrially pure titanium of titanium stainless steel.Also can be all to adopt industrially pure titanium to make.
The present invention prevents that the acrylic acid production device corroding method is applicable to vinylformic acid production, the work-ing life of prolongation equipment, save the equipment replacement expense, reduce the loss that stops production, and the impurity of having avoided the slave unit internal corrosion to get off sneaks in the product, helps to ensure quality product.This method also can be used for other organic chemical industry's processes of handling corrosive mediums, can also avoid since the evaporating, emitting, dripping or leaking of liquid or gas that equipment corrosion causes to the pollution and the accident potential of environment.
Claims (2)
1, a kind of acrylic acid production device corroding method that prevents is characterized in that equipment or its part parts that this production equipment contacts with vinylformic acid, acetic acid adopt the titanium material to make.
2, anti-corrosion method according to claim 1 is characterized in that adopting the industrially pure titanium material, also can adopt the compound or compound structure of titanium stainless steel of titanium carbon steel, and the one side of crevice corrosion medium is a titanium layer, and another side is carbon steel or stainless steel layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90100180 CN1019910C (en) | 1990-01-18 | 1990-01-18 | Method for preventing acrylic acid production device from being corroded |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90100180 CN1019910C (en) | 1990-01-18 | 1990-01-18 | Method for preventing acrylic acid production device from being corroded |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1046325A CN1046325A (en) | 1990-10-24 |
| CN1019910C true CN1019910C (en) | 1993-02-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90100180 Expired - Fee Related CN1019910C (en) | 1990-01-18 | 1990-01-18 | Method for preventing acrylic acid production device from being corroded |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1019910C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015072753A (en) * | 2013-10-02 | 2015-04-16 | トヨタ自動車株式会社 | Lithium ion secondary battery |
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1990
- 1990-01-18 CN CN 90100180 patent/CN1019910C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1046325A (en) | 1990-10-24 |
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Free format text: CORRECT: PATENTEE; FROM: DONGFANG CHEMICAL PLANT, BEIJING, THE EAST CHEMICAL PLANT,BEIJING TO: DONGFANG CHEMICAL FACTORY, BEIJING CHEMICAL INDUSTRY GROUP CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Patentee after: Dongfang Chemical Plant, Beijing Chemical Industry Group Co., Ltd. Patentee before: Dongfang Chemical Plant, Beijing |
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| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |