CN105695018A - Additive for liquefied gas mercaptan removal and application method thereof - Google Patents
Additive for liquefied gas mercaptan removal and application method thereof Download PDFInfo
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- CN105695018A CN105695018A CN201610186271.XA CN201610186271A CN105695018A CN 105695018 A CN105695018 A CN 105695018A CN 201610186271 A CN201610186271 A CN 201610186271A CN 105695018 A CN105695018 A CN 105695018A
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- metal phthalocyanine
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/12—Liquefied petroleum gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/28—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of the platinum group metals, iron group metals or copper
- B01J31/30—Halides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
- B01J2531/20—Complexes comprising metals of Group II (IIA or IIB) as the central metal
- B01J2531/26—Zinc
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
- B01J2531/80—Complexes comprising metals of Group VIII as the central metal
- B01J2531/84—Metals of the iron group
- B01J2531/842—Iron
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
- B01J2531/80—Complexes comprising metals of Group VIII as the central metal
- B01J2531/84—Metals of the iron group
- B01J2531/845—Cobalt
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
- B01J2531/80—Complexes comprising metals of Group VIII as the central metal
- B01J2531/84—Metals of the iron group
- B01J2531/847—Nickel
Abstract
The invention discloses an additive for liquefied gas mercaptan removal and an application method thereof. The additive is composed of 2-15% of solubilizer, 1-5% of cosolvent, 0.01-0.1% of catalyst, 0.001-0.01% of oxygen carrying agent and the balance of softened water. The product has the advantages of high mercaptan removal rate, no environmental pollution and low addition amount, enhances the liquefied gas quality, reduces the caustic sludge discharge amount, and is simple to operate.
Description
Technical field
The present invention relates to a kind of liquid gas sweetening additive, belong to petrochemical industry。
Background technology
Expansion along with petrochemical industry oil refining production capacity, refining & chemical industry integration has become the important profit model of oil, natural gas deep processing, process external high-sulfur, the ratio of crude oil with poor quality is increasing year by year, and the liquefied gas medium sulphide content content that plant catalytic device produces is also in continuous rising。Sulfide generally has hydrogen sulfide, mercaptan etc., not only frowziness and corrosivity, and the sulfur dioxide produced after burning can form acid rain, contaminated environment。
At present, the refining main employing Merox extracting-liquid phase catalytic oxidation of the petroleum refinery fluidized QI prostration mercaptan of China。In extraction tower, the mercaptan in liquefied gas and aqueous slkali (sulfonated phthalocyanine cobalt alkali liquor) react generation sodium mercaptides and transfer to alkali mutually in；Alkali liquor after separating with liquefied gas enters oxidation regeneration tower, and under air effect, the sodium mercaptides in alkali liquor is oxidized to disulphide, it is achieved the elimination of mercaptan, and alkali liquor, catalyst regeneration, recycle simultaneously。But Merox method there is also significantly shortcoming: 1. mercaptan is faintly acid, and owing to can not form hydrogen bond, the dissolubility in water is less, it is likely to elimination when being in that alkali liquor short-time contact not thorough, causes that liquefied gas sulfur content exceeds standard；2. to be oxidized to the speed of disulphide slower for sodium mercaptides, not oxidized sodium mercaptides is accumulated repeatedly in blood circulation, alkali liquor efficiency can be made to be substantially reduced, be equivalent to add charging mercaptans content, such vicious cycle causes removal of mercaptans effect bad, causing that alkali liquor is changed frequently, alkaline residue discharge capacity is big, has not only increased cost but also contaminated environment。
Application number is CN01115579.5 light oil or petroleum gas sweetening sulphur compound preparation and removing process thereof, use inorganic strong alkali sodium hydroxide, organic amine or hydramine, catalyst, water mix preparation for liquefied gas, demercaptaning for gasoline, the concentration of sodium hydroxide is preferably above more than 35%, the easy crystallization of mercaptides that reaction generates, system pressure drop is big；It is slow that sodium mercaptides is oxidized to disulphide speed, causes that in blood circulation, alkali number reduces, and alkali liquor is changed frequently；It is also easy to during high-concentration alkali liquor oxidation regeneration caustic embrittlement, causes equipment corrosion。
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of efficient liquid gas sweetening additive。According to the similar principle mixed, add that molecular structure and mercaptan is close in the catalyst and water solublity much larger than the cosolvent of mercaptan, improve mercaptan dissolubility in alkali liquor, be simultaneously introduced oxygen carrier and be greatly improved the alkali liquor dissolubility to oxygen, increase sodium mercaptides and be converted into the conversion ratio of disulphide。
To achieve these goals, the present invention is realized by below scheme:
A kind of liquid gas sweetening additive, is made up of following component, and the mass ratio of each component is as follows:
Described solubilizing agent is inorganic strong alkali compounds。
Described inorganic strong alkali compounds is selected from sodium hydroxide, potassium hydroxide, Lithium hydrate, sodium carbonate, potassium carbonate, one or more in lithium carbonate。
The purpose of solubilizing agent is exactly the sodium mercaptides that mercaptan becomes being dissolved in water, and liquefied gas is water insoluble, thus realizing the separation of liquefied gas and mercaptan, because mercaptan is lewis acid, there is faintly acid, and these several materials all have strong basicity, be more beneficial for mercaptan and generate sodium mercaptides。Alkalescence is more strong, and the tendency generating sodium mercaptides is more big。
Described cosolvent is organic amine or alcamines or multicomponent alcoholics compound。
Described cosolvent is selected from: 1,2-propane diamine, ethanolamine, diethanolamine, N methyldiethanol amine, diisopropanolamine (DIPA), one or more in ethylene glycol, propylene glycol, glycerol。
Cosolvent mainly includes amine cosolvent and co-solvent, and these cosolvents all have the nonpolar alkyl chain with mercaptan analog structure and polar portion, and according to the similar principle that mixes, these cosolvents can dissolve each other with mercaptan。But the dissolubility that these cosolvents are in water to be far longer than mercaptan, therefore adding appropriate cosolvent can increase mercaptan dissolubility in alkali liquor。
Described catalyst is metal phthalocyanine class。
Described catalyst is selected from poly-metal phthalocyanine, sulfonated metal phthalocyanine, carboxylation metal phthalocyanine, one or more in multinuclear sulfonated metal phthalocyanine, multinuclear carboxylation metal phthalocyanine。
One or more in metal chosen from Fe in described metal phthalocyanine, nickel, magnesium, cobalt, zinc。
One or more in triiodide ruthenium, tribromide ruthenium, ruthenium trichloride, acetic acid ruthenium, ruthenocene, ruthenium hydrochloride potassium, carbonyl ruthenic chloride, ruthenium hydrochloride ammonium of described oxygen carrier。
Owing to ruthenium metal itself has certain oxytropism, its ruthenium compound can effective activation alkene, alkynes, it is achieved corresponding functional group conversions, and can realize the conversion of multiple functional group in the presence of oxygen。This patent is exactly that the oxidation system auxiliary phthalocyanine catalyst utilizing ruthenium compound and oxygen composition is to realize the sodium mercaptides conversion to thioether。This saying of oxygen carrier is a kind of protective measure to this patent, is really a kind of high-efficiency desulfurization catalyst, and it can improve the utilization rate to oxygen。
The application process of a kind of liquid gas sweetening additive, it is after 10～20% sodium hydroxide solutions that this additive is dissolved in mass fraction, injects desulfurizer, and the mass fraction of this additive is 5%～20%。
The main technique of existing liquid gas sweetening has Merox method, but Merox method there is also significantly shortcoming: 1. mercaptan is faintly acid, and owing to can not form hydrogen bond, the dissolubility in water is less, it is likely to elimination when being in that alkali liquor short-time contact not thorough, causes that liquefied gas sulfur content exceeds standard；2. to be oxidized to the speed of disulphide slower for sodium mercaptides, not oxidized sodium mercaptides is accumulated repeatedly in blood circulation, alkali liquor efficiency can be made to be substantially reduced, be equivalent to add charging mercaptans content, such vicious cycle causes removal of mercaptans effect bad, causing that alkali liquor is changed frequently, alkaline residue discharge capacity is big, has not only increased cost but also contaminated environment。
This patent adds cosolvent, increases mercaptan dissolubility in alkali liquor, promotes the mercaptan in liquefied gas to be dissolved in water as much as possible, reduces sulfur content in liquefied gas。It is react generation disulphide by sodium mercaptides and the dissolved oxygen in alkali liquor that sodium mercaptides is oxidized to disulphide, and the oxygen carrier added in this patent decreases the problem that the sodium mercaptides oxidation caused owing to dissolved oxygen content is low is not thoroughly repeatedly accumulated in blood circulation。
In sum, the present invention has the advantage that technique is simple, extrusion rate is high compared with existing desulfuration of liquefied gas catalyst, uses auxiliary agent of the present invention, and the content of the mercaptan sulfur compound in liquefied petroleum gas can be made to drop to below 10ppm；Catalyst of the present invention is corrosion-free to equipment；After using catalyst of the present invention, alkaline residue discharge capacity significantly reduces, and has both reduced cost, again environmental protection treatment pressure。
Detailed description of the invention
Embodiment 1
Preparation proportioning: sodium hydroxide 10%, ethylene glycol 5%, sulfonated phthalocyanine cobalt 0.02%, ruthenium trichloride 0.006%, surplus is industrial soft water。
Preparation method: add the industrial soft water of said ratio amount in a kettle., adds the sodium hydroxide of said ratio amount, ethylene glycol, sulfonated phthalocyanine cobalt, ruthenium trichloride so that it is fully dissolve under agitation。
The catalyst prepared is joined in the ratio of 10% in the sodium hydrate aqueous solution of 20%, inject reaction unit。
Before adding agent, when the average total sulfur content of liquefied gas is 252mg/Nm3Time, fine gas mean content of sulfur is 7.4mg/Nm3, alkali liquor period of a permutation is 20d；After adding agent, the average total sulfur content of liquefied gas is 64.8mg/Nm3Time, fine gas mean content of sulfur is 4.5mg/Nm3, alkali liquor period of a permutation is 90d。
Embodiment 2
Preparation proportioning: potassium hydroxide 15%, propylene glycol 4%, binuclear cluster complexes 0.03%, ruthenium trichloride 0.008%, surplus is industrial soft water。
Preparation method: add the industrial soft water of said ratio amount in a kettle., adds the potassium hydroxide of said ratio amount, propylene glycol, binuclear cluster complexes, ruthenium trichloride so that it is fully dissolve under agitation。
The catalyst prepared is joined in the ratio of 12% in the sodium hydrate aqueous solution of 15%, inject reaction unit。
Before adding agent, when the average total sulfur content of liquefied gas is 289mg/Nm3Time, fine gas mean content of sulfur is 17.2mg/Nm3, alkali liquor period of a permutation is 17d；After adding agent, the average total sulfur content of liquefied gas is 51.4mg/Nm3Time, fine gas mean content of sulfur is 3.7mg/Nm3, alkali liquor period of a permutation is 81d。
Embodiment 3
Preparation proportioning: Lithium hydrate 15%, propylene glycol 4.6%, sulfonated phthalocyanine ferrum 0.06%, tribromide ruthenium 0.007%, surplus is industrial soft water。
Preparation method: add the industrial soft water of said ratio amount in a kettle., adds the Lithium hydrate of said ratio amount, propylene glycol, sulfonated phthalocyanine ferrum, tribromide ruthenium so that it is fully dissolve under agitation。
The catalyst prepared is joined in the ratio of 15% in the sodium hydrate aqueous solution of 17%, inject reaction unit。
Before adding agent, when the average total sulfur content of liquefied gas is 295mg/Nm3Time, fine gas mean content of sulfur is 18.5mg/Nm3, alkali liquor period of a permutation is 15d；After adding agent, the average total sulfur content of liquefied gas is 67.2mg/Nm3Time, fine gas mean content of sulfur is 4.3mg/Nm3, alkali liquor period of a permutation is 70d。
Embodiment 4
Preparation proportioning: potassium hydroxide 10%, sodium carbonate 3%, propylene glycol 3%, 1,2-propane diamine 2%, binuclear cluster complexes 0.03%, triiodide ruthenium 0.009%, surplus is industrial soft water。
Preparation method: add the industrial soft water of said ratio amount in a kettle., adds the potassium hydroxide of said ratio amount, sodium carbonate, propylene glycol, 1,2-propane diamine, binuclear cluster complexes, triiodide ruthenium so that it is fully dissolve under agitation。
The catalyst prepared is joined in the ratio of 14% in the sodium hydrate aqueous solution of 25%, inject reaction unit。
Before adding agent, when the average total sulfur content of liquefied gas is 242mg/Nm3Time, fine gas mean content of sulfur is 10.6mg/Nm3, alkali liquor period of a permutation is 20d；After adding agent, the average total sulfur content of liquefied gas is 90.2mg/Nm3Time, fine gas mean content of sulfur is 2.7mg/Nm3, alkali liquor period of a permutation is 83d。
Embodiment 5
Preparation proportioning: potassium hydroxide 10%, lithium carbonate 5%, diethanolamine 2.5%, triethanolamine 2.5%, sulfonation phthalocyanine phthalocyanine zinc 0.05%, ruthenium trichloride 0.007%, ruthenocene 0.003%, surplus is industrial soft water。
Preparation method: add the industrial soft water of said ratio amount in a kettle., adds the potassium hydroxide of said ratio amount, lithium carbonate, diethanolamine, triethanolamine, sulfonation phthalocyanine phthalocyanine zinc, ruthenium trichloride, ruthenocene so that it is fully dissolve under agitation。
The catalyst prepared is joined in the ratio of 10% in the sodium hydrate aqueous solution of 25%, inject reaction unit。
Before adding agent, when the average total sulfur content of liquefied gas is 237mg/Nm3Time, fine gas mean content of sulfur is 9.7mg/Nm3, alkali liquor period of a permutation is 19d；After adding agent, the average total sulfur content of liquefied gas is 95mg/Nm3Time, fine gas mean content of sulfur is 3.6mg/Nm3, alkali liquor period of a permutation is 69d。
Embodiment 6
Preparation proportioning: potassium hydroxide 12%, potassium carbonate 2%, propylene glycol 3%, ethylene glycol 2%, double-core sulfonated phthalocyanine nickel 0.04%, ruthenium trichloride 0.003%, ruthenium hydrochloride potassium 0.004%, surplus is industrial soft water。
Preparation method: add the industrial soft water of said ratio amount in a kettle., adds the potassium hydroxide of said ratio amount, potassium carbonate, propylene glycol, ethylene glycol, double-core sulfonated phthalocyanine nickel, ruthenium trichloride, ruthenium hydrochloride potassium so that it is fully dissolve under agitation。
The catalyst prepared is joined in the ratio of 15% in the sodium hydrate aqueous solution of 20%, inject reaction unit。
Before adding agent, when the average total sulfur content of liquefied gas is 235mg/Nm3Time, fine gas mean content of sulfur is 12.4mg/Nm3, alkali liquor period of a permutation is 20d；After adding agent, the average total sulfur content of liquefied gas is 82.8mg/Nm3Time, fine gas mean content of sulfur is 5.7mg/Nm3, alkali liquor period of a permutation is 79d。
Embodiment 7
Preparation proportioning: Lithium hydrate 10%, potassium carbonate 4%, propylene glycol 2%, glycerol 2%, double-core sulfonation phthalocyanine phthalocyanine zinc 0.03%, ruthenium trichloride 0.008%, surplus is industrial soft water。
Preparation method: add the industrial soft water of said ratio amount in a kettle., adds the Lithium hydrate of said ratio amount, potassium carbonate, propylene glycol, glycerol, double-core sulfonation phthalocyanine phthalocyanine zinc, ruthenium trichloride so that it is fully dissolve under agitation。
The catalyst prepared is joined in the ratio of 13% in the sodium hydrate aqueous solution of 20%, inject reaction unit。
Before adding agent, when the average total sulfur content of liquefied gas is 265mg/Nm3Time, fine gas mean content of sulfur is 6.7mg/Nm3, alkali liquor period of a permutation is 21d；After adding agent, the average total sulfur content of liquefied gas is 83mg/Nm3Time, fine gas mean content of sulfur is 3.1mg/Nm3, alkali liquor period of a permutation is 92d。
Embodiment 8
Preparation proportioning: sodium hydroxide 9%, potassium carbonate 4%, ethylene glycol 2%, ethanolamine 2%, binuclear cluster complexes 0.04%, acetic acid ruthenium 0.004%, triiodide ruthenium 0.004%, surplus is industrial soft water。
Preparation method: add the industrial soft water of said ratio amount in a kettle., adds the sodium hydroxide of said ratio amount, potassium carbonate, ethylene glycol, ethanolamine, binuclear cluster complexes, acetic acid ruthenium, triiodide ruthenium so that it is fully dissolve under agitation。
The catalyst prepared is joined in the ratio of 15% in the sodium hydrate aqueous solution of 25%, inject reaction unit。
Before adding agent, when the average total sulfur content of liquefied gas is 248mg/Nm3Time, fine gas mean content of sulfur is 7.5mg/Nm3, alkali liquor period of a permutation is 21d；After adding agent, the average total sulfur content of liquefied gas is 72mg/Nm3Time, fine gas mean content of sulfur is 4.3mg/Nm3, alkali liquor period of a permutation is 93d。
Embodiment 9
Preparation proportioning: potassium hydroxide 5%, sodium hydroxide 5%, diisopropanolamine (DIPA) 4%, poly-sulfonated phthalocyanine cobalt 0.04%, tribromide ruthenium 0.008%, surplus is industrial soft water。
Preparation method: add the industrial soft water of said ratio amount in a kettle., adds the potassium hydroxide of said ratio amount, sodium hydroxide, diisopropanolamine (DIPA), poly-sulfonated phthalocyanine cobalt, tribromide ruthenium so that it is fully dissolve under agitation。
The catalyst prepared is joined in the ratio of 13% in the sodium hydrate aqueous solution of 20%, inject reaction unit。
Before adding agent, when the average total sulfur content of liquefied gas is 246mg/Nm3Time, fine gas mean content of sulfur is 6.7mg/Nm3, alkali liquor period of a permutation is 20d；After adding agent, the average total sulfur content of liquefied gas is 54mg/Nm3Time, fine gas mean content of sulfur is 3.2mg/Nm3, alkali liquor period of a permutation is 87d。
Embodiment 10
Preparation proportioning: potassium carbonate 5%, lithium carbonate 7%, glycerol 2%, N methyldiethanol amine 3%, poly-sulfonation phthalocyanine phthalocyanine zinc 0.04%, carbonyl ruthenic chloride 0.008%, surplus is industrial soft water。
Preparation method: add the industrial soft water of said ratio amount in a kettle., adds the potassium carbonate of said ratio amount, lithium carbonate, glycerol, N methyldiethanol amine, poly-sulfonation phthalocyanine phthalocyanine zinc, carbonyl ruthenic chloride so that it is fully dissolve under agitation。
The catalyst prepared is joined in the ratio of 15% in the sodium hydrate aqueous solution of 25%, inject reaction unit。
Before adding agent, when the average total sulfur content of liquefied gas is 208mg/Nm3Time, fine gas mean content of sulfur is 12.2mg/Nm3, alkali liquor period of a permutation is 15d；After adding agent, the average total sulfur content of liquefied gas is 89mg/Nm3Time, fine gas mean content of sulfur is 5.3mg/Nm3, alkali liquor period of a permutation is 68d。
Claims (10)
1. a liquid gas sweetening additive, it is characterised in that be made up of following component, and the mass ratio of each component is as follows:
2. liquid gas sweetening additive as claimed in claim 1, it is characterised in that: described solubilizing agent is inorganic strong alkali compounds。
3. liquid gas sweetening additive as claimed in claim 2, it is characterised in that: described inorganic strong alkali compounds is selected from sodium hydroxide, potassium hydroxide, Lithium hydrate, sodium carbonate, potassium carbonate, one or more in lithium carbonate。
4. liquid gas sweetening additive as claimed in claim 1, it is characterised in that: described cosolvent is organic amine or alcamines or multicomponent alcoholics compound。
5. liquid gas sweetening additive as claimed in claim 4, it is characterised in that: described cosolvent is selected from: 1,2-propane diamine, ethanolamine, diethanolamine, N methyldiethanol amine, diisopropanolamine (DIPA), one or more in ethylene glycol, propylene glycol, glycerol。
6. liquid gas sweetening additive as claimed in claim 1, it is characterised in that: described catalyst is metal phthalocyanine class。
7. liquid gas sweetening additive as claimed in claim 6, it is characterised in that: described catalyst is selected from poly-metal phthalocyanine, sulfonated metal phthalocyanine, carboxylation metal phthalocyanine, one or more in multinuclear sulfonated metal phthalocyanine, multinuclear carboxylation metal phthalocyanine。
8. liquid gas sweetening additive as claimed in claim 1, it is characterised in that: one or more in triiodide ruthenium, tribromide ruthenium, ruthenium trichloride, acetic acid ruthenium, ruthenocene, ruthenium hydrochloride potassium, carbonyl ruthenic chloride, ruthenium hydrochloride ammonium of described oxygen carrier。
9. liquid gas sweetening additive as claimed in claim 7, it is characterised in that: one or more in metal chosen from Fe in described metal phthalocyanine, nickel, magnesium, cobalt, zinc。
10. the application process of a liquid gas sweetening additive, it is characterised in that: after this additive is dissolved in mass fraction 10～20% sodium hydroxide solution, inject desulfurizer, and the mass fraction of this additive is 5%～20%。
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Cited By (6)
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| CN106635130A (en) * | 2016-12-05 | 2017-05-10 | 江苏汉光实业股份有限公司 | High-cleanness agent for removing mercaptan in gasoline and preparation method of high-cleanness agent |
| CN112708489A (en) * | 2021-01-13 | 2021-04-27 | 中国石油大学(北京) | Process for desulfurizing liquefied gas |
| CN112708488A (en) * | 2021-01-13 | 2021-04-27 | 中国石油大学(北京) | Liquefied petroleum gas sweetening composite solvent and preparation method and application thereof |
| CN112760146A (en) * | 2021-01-13 | 2021-05-07 | 中国石油大学(北京) | Auxiliary agent for improving regeneration performance of liquefied gas sweetening extractant and application thereof |
| CN112760148A (en) * | 2021-01-13 | 2021-05-07 | 中国石油大学(北京) | Liquefied petroleum gas sweetening composite solvent and preparation method and application thereof |
| CN112760147A (en) * | 2021-01-13 | 2021-05-07 | 中国石油大学(北京) | Extraction agent for liquefied gas sweetening alcohol and carbonyl sulfide and preparation method and application thereof |
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| CN112760147A (en) * | 2021-01-13 | 2021-05-07 | 中国石油大学(北京) | Extraction agent for liquefied gas sweetening alcohol and carbonyl sulfide and preparation method and application thereof |
| CN112760147B (en) * | 2021-01-13 | 2022-01-25 | 中国石油大学(北京) | Extraction agent for liquefied gas sweetening alcohol and carbonyl sulfide and preparation method and application thereof |
| CN112760146B (en) * | 2021-01-13 | 2022-01-25 | 中国石油大学(北京) | Auxiliary agent for improving regeneration performance of liquefied gas sweetening extractant and application thereof |
| CN112708488B (en) * | 2021-01-13 | 2022-01-25 | 中国石油大学(北京) | Liquefied petroleum gas sweetening composite solvent and preparation method and application thereof |
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| CN105695018B (en) | 2019-02-15 |
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