CN101591559A - Each material high precision, capacity dehydration method in a kind of petrochemical process - Google Patents
Each material high precision, capacity dehydration method in a kind of petrochemical process Download PDFInfo
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- CN101591559A CN101591559A CNA2008101136361A CN200810113636A CN101591559A CN 101591559 A CN101591559 A CN 101591559A CN A2008101136361 A CNA2008101136361 A CN A2008101136361A CN 200810113636 A CN200810113636 A CN 200810113636A CN 101591559 A CN101591559 A CN 101591559A
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- dewatering agent
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- dewatering
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Abstract
The invention provides each material high precision, capacity dehydration method in a kind of petrochemical process.The dewatering agent that the inventive method is used is selected from crosslinked salt polyacrylate, vinyl alcohol-acrylate segmented copolymer, sex change PVA, polyvinyl alcohol, polyacrylamide, starch grafted acrylate, starch and acrylic acid acrylamide and along one or both mixture in tetrapolymer, cellulose graft acrylate, the starch-grafted vinyl cyanide saponification hydrolyzates such as acid anhydrides.Dewatering provided by the invention, the water absorbent rate height has reduced the dehydration cost.
Description
Technical field
The present invention relates to various material high precisions, capacity dehydration method in a kind of petrochemical process, belong to petrochemical complex material purification techniques.
Background technology
Moisture in the crude oil and settling often make troubles for processing refining, and settling can stop up, wearing and tearing even etching apparatus, and are to cause that distillation produces the major cause of liquid flooding (distillation tower dashes oil) during the having of moisture content.And the moisture content in the petroleum products is light then cause diffusing, the backfire of advancing of flame, and is heavy then interrupt burning fully and cause flame-out; As for settling is to cause burner nozzle to stop up, and causes one of nozzle and sensing unit abrasive reason, and because incendiary is undesired causes calorific loss and reduce thermo-efficiency greatly.
The existence of water roughly has three kinds of forms in the petroleum products: 1. suspension, and moisture content is suspended in the oil with the water droplet form, is more common in the bigger mink cell focus of viscosity and proportion, in residual fuel oil, existence is also arranged in the crude oil; 2. emulsification shape, moisture content is dispersed in the oil with superfine microballon, separation difficulty; 3. dissolved form, moisture content is dissolved in the oil, the water-content atomic (as the minor amount of water that exists in the aviation fuel) that general this form exists, but to remove then also more difficult.
Moisture content in the petroleum products shows as deleterious impurity: 1. etching apparatus part; To absorb heat during 2. owing to the water evaporation, therefore will reduce the thermal value of oil product; 3. worsen the especially combustion processes of light-end products of oil product, and can bring the dissolved salt in the being contained in water into cylinder and cause carbon deposit, increase cylinder wear, in the heavy oil product if there is excessive moisture content to exist easier causing to stop working; 4. under the cold condition, easily freeze and obstruction burning line and strainer, obstruction and even interruption are to the fuel feeding of engine; 5. quicken the oxidation and the gel of oil product.
Therefore, removing of water is a problem that demand side is right in the petroleum products.
The method that is used for hydro carbons and oil dehydrating in history has multiple, can be divided into solvent absorption, solid absorption method, directly method of cooling and chemical reaction method etc., and wherein solvent absorption and solid absorption method are commonplace.The solid absorption method is applicable to the dehydration of small-flow gas or liquid.And solid dewatering agent relatively more commonly used at present mainly contains molecular sieve, aluminum oxide, solid caustic soda.
At present, the maximum dewatering agent of industrial use is aluminum oxide, solid caustic soda (NaOH) and molecular sieve.Molecular sieve is used mainly that kind has 3A, 4A, 5A, 13X and is the modified product of matrix with above-mentioned.The water-intake rate of molecular sieve generally can reach the 20-26% of own wt, and the water-intake rate of activated alumina generally can reach the 15-17% of own wt, and solid caustic soda (NaOH) water-intake rate also can only reach about 15% of own wt, and maximum shortcoming is easy deliquescence.
The shortcoming of aluminum oxide, solid caustic soda (NaOH) and this three classes water-retaining agent of molecular sieve is that water absorbent rate is not high.When in case foreign matter contents such as water in the production equipment raw material and sulphur change greatly, make dehydration capacity such as solid caustic soda, aluminum oxide, molecular sieve reach capacity very soon, thereby need often switch drying chamber, emptying suction tower, nitrogen replacement, the operating process of nitrogen temperature regenerated, thereby cause recirculated water, nitrogen, electricity etc. consumptions to increase, increased the device operation cost.
Super absorbent resin is a kind of superpolymer with certain crosslinking degree, and the water of big hundreds of times of specific absorption own wt forms gel soon, and this gel still can maintain moisture and not separate out under certain pressure.It is water insoluble, also be insoluble to organic solvent and oil, and the advantage that possesses macromolecular material, compare with traditional water-absorbing material and to have bigger advantage: compare with sponge, cotton, Mierocrystalline cellulose, silica gel, the water regain of super absorbent resin is big, water-retentivity is strong, and has the favorable biological degradability energy.Super absorbent resin is a kind of macromolecular material, peculiar water absorbing properties and water retention capacity are arranged, and suction can reach tens times and even several thousand times of own wt, and can generate gel in the several seconds, and water-retentivity is strong, be heated, also be difficult for dehydration under the pressurized conditions, light, heat, the good stability of soda acid has the favorable biological degradability energy, possesses the advantage of macromolecular material simultaneously again.
The superior performance of super strength water absorbent, purposes are very extensive, no matter are farming, woods, gardening, petroleum chemistry chemical industry, commodity chemical industry, or building material industry, health care, communications and transportation etc. have penetrated into every field all using.The research of China is started late, and abroad compares, and gap is bigger.Particularly applied research is not also well carried out, and does not form throughput as yet, is the extraordinary products of a kind of market outlook.
Though hydroscopic high-molecular resin has stronger water-absorbent, not appearing in the newspapers is used for petrochemical process and is used for all kinds of materials such as oil product and dewaters.
Summary of the invention
The purpose of this invention is to provide in a kind of petrochemical process various material high precisions, capacity dehydration method.In the dewatering provided by the invention, the water-retaining agent of use is selected from crosslinked salt polyacrylate, vinyl alcohol-acrylate segmented copolymer, sex change PVA, polyvinyl alcohol, polyacrylamide, starch grafted acrylate, starch and acrylic acid acrylamide and along one or both mixture in tetrapolymer, cellulose graft acrylate, the starch-grafted vinyl cyanide saponification hydrolyzates such as acid anhydrides.
Method of the present invention, preferred dehydration reaction temperature is 10 ℃～50 ℃, and pressure is 0.1MPa～5.0Mpa, and the volume space velocity by the dewatering agent bed is 0.5～20h
-1
For C
5Above hydrocarbon material dehydration, more preferably the dehydration reaction temperature is 20-30 ℃, and pressure is 0.1MPa, and the volume space velocity by the dewatering agent bed is 2.0h
-1
For C
5Following hydrocarbon material dehydration, more preferably the dehydration reaction temperature is 20-30 ℃, and pressure is 0.7-1.3MPa, and the volume space velocity by the dewatering agent bed is 2.0h
-1
Method of the present invention is specially adapted to liquid hydrocarbon C3, C4, Sweet natural gas, splitting gas, nitrogen, fuel gas, petroleum naphtha, the high precision of boat coal, capacity dehydration.
Dewatering provided by the invention, dehydration rate be greater than 90%, the water absorbent rate height, and regeneration condition gentleness, regeneration temperature are not higher than 180 ℃.Compared with prior art, reduce the water-retaining agent regeneration times, reduced the water-retaining agent regeneration cost.Structures shape character, there is a large amount of hydrophilic radicals on the water-retaining agent molecular chain, to such an extent as to water-retaining agent not only absorbs water, and hydrophilic organic material had the certain absorption ability, but oil product (non-hydroaropic substance) such as adsorbs hydrocarbons not, therefore, water-retaining agent is removed hydrophilic organics hydrophilicity or remove the aqueous solution of hydrophilic organics hydrophilicity from oil from oil, can improve the quality of oil like this.Water-retaining agent also has thermostability than higher, the stability in storage height, and characteristics that can not desulfurization, and also intensity and stability after the water-retaining agent suction do not reduce, and is applicable to the dehydration of full scale plant material.
Embodiment:
In order to illustrate further the present invention, provide the following example.
Embodiment 1
Experimental procedure is as follows: the evaluation test of test dewatering agent is carried out in the pressurization evaluating apparatus, the reactor diameter 13mm of pressurization evaluating apparatus, and granularity is the 40-60 order, Intake Quantity is 10ml.Test conditions: air speed is 2.0h
-1Temperature is 20 ℃; Pressure is 1.0Mpa.Allow the reactor of liquefied petroleum gas (LPG) by the evaluating apparatus that pressurizes, to the liquefied petroleum gas (LPG) water using analysis instrument detecting of import and export.Experimental raw is a catalytic cracking liquefied petroleum gas (LPG) after the alkali cleaning, moisture 2000ppm.
Dewatering agent is selected crosslinked salt polyacrylate for use, moves 20 days (be equivalent to dewater multiplying power 2 times), and the outlet water-content is less than 200ppm, and dehydration rate is greater than 90%.
Embodiment 2
Experimental procedure is as follows: the evaluation test of test dewatering agent is carried out in the pressurization evaluating apparatus, the reactor diameter 13mm of pressurization evaluating apparatus, and granularity is the 40-60 order, Intake Quantity is 10ml.Test conditions: air speed is 2.0h
-1Temperature is 21 ℃; Pressure is 1.0Mpa.Allow the reactor of liquefied petroleum gas (LPG) by the evaluating apparatus that pressurizes, to the liquefied petroleum gas (LPG) water using analysis instrument detecting of import and export.Experimental raw is a catalytic cracking liquefied petroleum gas (LPG) after the alkali cleaning, moisture 2000ppm.
Dewatering agent is selected vinyl alcohol-acrylate segmented copolymer for use, moves 20 days (be equivalent to dewater multiplying power 2 times), and the outlet water-content is less than 200ppm, and dehydration rate is greater than 90%.
Embodiment 3
Experimental procedure is as follows: the evaluation test of test dewatering agent is carried out in the pressurization evaluating apparatus, the reactor diameter 13mm of pressurization evaluating apparatus, and granularity is the 40-60 order, Intake Quantity is 10ml.Test conditions: air speed is 2.0h
-1Temperature is 22 ℃; Pressure is 1.0Mpa.Allow the reactor of liquefied petroleum gas (LPG) by the evaluating apparatus that pressurizes, to the liquefied petroleum gas (LPG) water using analysis instrument detecting of import and export.Experimental raw is a catalytic cracking liquefied petroleum gas (LPG) after the alkali cleaning, moisture 2000ppm.
Dewatering agent is selected the cellulose graft acrylate for use, moves 20 days (be equivalent to dewater multiplying power 2 times), and the outlet water-content is less than 200ppm, and dehydration rate is greater than 90%.
Embodiment 4
Experimental procedure is as follows: the evaluation test of test dewatering agent is carried out in the pressurization evaluating apparatus, the reactor diameter 13mm of pressurization evaluating apparatus, and granularity is the 40-60 order, Intake Quantity is 10ml.Test conditions: air speed is 2.0h
-1Temperature is 23 ℃; Pressure is 1.0Mpa.Allow the reactor of liquefied petroleum gas (LPG) by the evaluating apparatus that pressurizes, to the liquefied petroleum gas (LPG) water using analysis instrument detecting of import and export.Experimental raw is a catalytic cracking liquefied petroleum gas (LPG) after the alkali cleaning, moisture 2000ppm.
Dewatering agent is selected polyvinyl alcohol for use, moves 20 days (be equivalent to dewater multiplying power 2 times), and the outlet water-content is less than 200ppm, and dehydration rate is greater than 90%.
Embodiment 5
Experimental procedure is as follows: the evaluation test of test dewatering agent is carried out in the pressurization evaluating apparatus, the reactor diameter 13mm of pressurization evaluating apparatus, and granularity is the 40-60 order, Intake Quantity is 10ml.Test conditions: air speed is 2.0h
-1Temperature is 24 ℃; Pressure is 1.0Mpa.Allow the reactor of liquefied petroleum gas (LPG) by the evaluating apparatus that pressurizes, to the liquefied petroleum gas (LPG) water using analysis instrument detecting of import and export.Experimental raw is a catalytic cracking liquefied petroleum gas (LPG) after the alkali cleaning, moisture 2000ppm.
Dewatering agent is selected polyacrylamide for use, moves 20 days (be equivalent to dewater multiplying power 2 times), and the outlet water-content is less than 200ppm, and dehydration rate is greater than 90%.
Embodiment 6
Experimental procedure is as follows: the evaluation test of test dewatering agent is carried out in the pressurization evaluating apparatus, the reactor diameter 13mm of pressurization evaluating apparatus, and granularity is the 40-60 order, Intake Quantity is 10ml.Test conditions: air speed is 2.0h
-1Temperature is 25 ℃; Pressure is 1.0Mpa.Allow the reactor of liquefied petroleum gas (LPG) by the evaluating apparatus that pressurizes, to the liquefied petroleum gas (LPG) water using analysis instrument detecting of import and export.Experimental raw is a catalytic cracking liquefied petroleum gas (LPG) after the alkali cleaning, moisture 2000ppm.
Dewatering agent is selected sex change PVA for use, moves 20 days (be equivalent to dewater multiplying power 2 times), and the outlet water-content is less than 200ppm, and dehydration rate is greater than 90%.
Embodiment 7
Experimental procedure is as follows: the evaluation test of test dewatering agent is carried out in the pressurization evaluating apparatus, the reactor diameter 13mm of pressurization evaluating apparatus, and granularity is the 40-60 order, Intake Quantity is 10ml.Test conditions: air speed is 2.0h
-1Temperature is 25 ℃; Pressure is 1.0Mpa.Allow the reactor of liquefied petroleum gas (LPG) by the evaluating apparatus that pressurizes, to the liquefied petroleum gas (LPG) water using analysis instrument detecting of import and export.Experimental raw is a catalytic cracking liquefied petroleum gas (LPG) after the alkali cleaning, moisture 2000ppm.
Dewatering agent is selected starch and acrylic acid acrylamide for use and along tetrapolymers such as acid anhydrides, move 20 days (be equivalent to dewater multiplying power 2 times), exports water-content less than 200ppm, and dehydration rate is greater than 90%.
Embodiment 8
Experimental procedure is as follows: the evaluation test of test dewatering agent is carried out in the pressurization evaluating apparatus, the reactor diameter 13mm of pressurization evaluating apparatus, and granularity is the 40-60 order, Intake Quantity is 10ml.Test conditions: air speed is 2.0h
-1Temperature is 25 ℃; Pressure is 1.0Mpa.Allow the reactor of liquefied petroleum gas (LPG) by the evaluating apparatus that pressurizes, to the liquefied petroleum gas (LPG) water using analysis instrument detecting of import and export.Experimental raw is a catalytic cracking liquefied petroleum gas (LPG) after the alkali cleaning, moisture 2000ppm.
Dewatering agent is selected polyvinyl alcohol and polyacrylamide amine mixt for use, moves 20 days (be equivalent to dewater multiplying power 2 times), and the outlet water-content is less than 200ppm, and dehydration rate is greater than 90%.
Regeneration tests: with 180 ℃ of nitrogen purgings of above-mentioned dewatering agent 4 hours, regenerate after 10 times, dehydrating effect still is that original state is more than 99%.
The above embodiment only for the purpose of description, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1, be used for the superpower dewatering agent of each material dewatering in a kind of petrochemical process, it is characterized in that: described dewatering agent is selected from crosslinked salt polyacrylate, vinyl alcohol-acrylate segmented copolymer, sex change PVA, polyvinyl alcohol, polyacrylamide, starch grafted acrylate, starch and acrylic acid acrylamide and along one or both mixture in tetrapolymer, cellulose graft acrylate, the starch-grafted vinyl cyanide saponification hydrolyzates such as acid anhydrides.
2, the described superpower dewatering agent of claim 1 application in each material dewatering in petrochemical process.
3, the application of superpower dewatering agent according to claim 1 in liquid hydrocarbon C3, C4, Sweet natural gas, splitting gas, nitrogen, fuel gas, petroleum naphtha, boat coal dewatering.
4, each material high precision, capacity dehydration method in a kind of petrochemical process comprise the steps:
Material after desulfurization dewaters by the dehydration reactor that dewatering agent is housed;
Wherein, the dewatering agent of use is selected from crosslinked salt polyacrylate, vinyl alcohol-acrylate segmented copolymer, sex change PVA, polyvinyl alcohol, polyacrylamide, starch grafted acrylate, starch and acrylic acid acrylamide and along one or both mixture in tetrapolymer, cellulose graft acrylate, the starch-grafted vinyl cyanide saponification hydrolyzates such as acid anhydrides.
5, method according to claim 4 is characterized in that, the temperature of reaction of described dehydration reactor is 10 ℃～50 ℃, and pressure is 0.1MPa～5.0Mpa.
6, the method for stating according to claim 5 is characterized in that: for C
5Above hydrocarbon material, temperature of reaction is 20-30 ℃, pressure is 0.1MPa; For C
5Following hydrocarbon material, temperature of reaction is 20-30 ℃, pressure is 0.7-1.3MPa.
7, method according to claim 4 is characterized in that: described material is 0.5～20h by the volume space velocity of the dewatering agent bed of dehydration reactor
-1
8, method according to claim 7 is characterized in that: described material is 2.0h by the volume space velocity of the dewatering agent bed of dehydration reactor
-1
9, according to the described method of each claim among the claim 4-8, it is characterized in that: for C
5Above hydrocarbon material, temperature of reaction is 20-30 ℃, pressure is 0.1MPa; For C
5Following hydrocarbon material water, temperature of reaction is 20-30 ℃, pressure is 0.7-1.3MPa; Material is 2.0h by the volume space velocity of the dewatering agent bed of dehydration reactor
-1
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103087073A (en) * | 2011-10-28 | 2013-05-08 | 中国石油化工股份有限公司 | Preparation method of polyolefin resin nucleating agent |
| CN104645723A (en) * | 2015-02-12 | 2015-05-27 | 太原理工大学 | Method for removing water of fine particle coal |
| CN104707449A (en) * | 2015-03-12 | 2015-06-17 | 福建三农化学农药有限责任公司 | Dehydration method and dehydration device of cracked gas in production of hexafluoropropylene |
| CN109097094A (en) * | 2018-06-29 | 2018-12-28 | 长江大学 | A kind of preparation method of nanometer of copolymer crude oil demulsifier |
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| CN1702157A (en) * | 2005-05-02 | 2005-11-30 | 北京三聚环保新材料有限公司 | Method for refining catalytic liquefied petroleum gas |
| CN101077984A (en) * | 2007-07-25 | 2007-11-28 | 中国石油大学(北京) | Deep desulfurization method for liquefied petroleum gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1702157A (en) * | 2005-05-02 | 2005-11-30 | 北京三聚环保新材料有限公司 | Method for refining catalytic liquefied petroleum gas |
| CN101077984A (en) * | 2007-07-25 | 2007-11-28 | 中国石油大学(北京) | Deep desulfurization method for liquefied petroleum gas |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103087073A (en) * | 2011-10-28 | 2013-05-08 | 中国石油化工股份有限公司 | Preparation method of polyolefin resin nucleating agent |
| CN103087073B (en) * | 2011-10-28 | 2015-04-01 | 中国石油化工股份有限公司 | Preparation method of polyolefin resin nucleating agent |
| CN104645723A (en) * | 2015-02-12 | 2015-05-27 | 太原理工大学 | Method for removing water of fine particle coal |
| CN104707449A (en) * | 2015-03-12 | 2015-06-17 | 福建三农化学农药有限责任公司 | Dehydration method and dehydration device of cracked gas in production of hexafluoropropylene |
| CN109097094A (en) * | 2018-06-29 | 2018-12-28 | 长江大学 | A kind of preparation method of nanometer of copolymer crude oil demulsifier |
| CN109097094B (en) * | 2018-06-29 | 2021-04-30 | 长江大学 | Preparation method of nano copolymer crude oil demulsifier |
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Application publication date: 20091202 |