CN113528208A - Natural gas sulfur-free odorizing agent - Google Patents
Natural gas sulfur-free odorizing agent Download PDFInfo
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- CN113528208A CN113528208A CN202110818460.5A CN202110818460A CN113528208A CN 113528208 A CN113528208 A CN 113528208A CN 202110818460 A CN202110818460 A CN 202110818460A CN 113528208 A CN113528208 A CN 113528208A
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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
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/103—Sulfur containing contaminants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
Abstract
The invention belongs to the technical field of odorants, in particular to a natural gas sulfur-free odorant, which aims at solving the problems that the existing sulfur-free odorant has single component and is insufficient as warning odor, the anti-oxidation and anti-corrosion performance is poor, the natural gas cannot be induced to burn in the aspect of use, the volatilization performance of liquid is insufficient in the aspect of odor warning, and a good warning effect cannot be achieved, and the following scheme is proposed, wherein the natural gas sulfur-free odorant comprises the following raw materials in percentage by weight: 20-23% of methyl acrylate, 28-31% of ethyl acrylate, 2-5% of 3-ethyl-2-methylpyrazine, 10-13% of n-butyl acetate, 10-13% of isopropyl tri-10-13%, a hydrocarbon mixture and the balance of ozone; the hydrocarbon mixture includes any two of methane, ethane, propane, and butane. The invention improves the oxidation and corrosion resistance of the odorant, improves the volatility and the combustion-supporting performance, and can play a good warning effect.
Description
Technical Field
The invention relates to the technical field of odorizing agents, in particular to a natural gas sulfur-free odorizing agent.
Background
The sulfur-free odorizing agent is a substance which has the same function as the conventional odorizing agent, can play a warning role, has strong mixing capability with natural gas, is in a gaseous state in a gas pipeline, has more prominent warning smell compared with the conventional odorizing agent, does not corrode the natural gas pipeline and equipment, and does not harm human bodies and the environment during combustion, is colorless transparent liquid with strong pungent smell, and is a mixture consisting of C4H6O2 (methyl acrylate), C5H8O2 (ethyl acrylate) and C7H10N2 (3-ethyl-2 methylpyrazine), and the mass fractions of the components are 37.4%, 60.0% and 2.5% respectively. The sulfur-free odorizing agent has the relative molecular mass of 95.543, the boiling point of 80 ℃ under normal pressure, the melting point of-80 ℃, the spontaneous combustion temperature of 395 ℃ and the explosion limit of 1.6-23.0 percent, is insoluble in water and can be dissolved in ethanol and ether. The sulfur-free odorant contains no sulfur.
The existing sulfur-free odorant has single component and is insufficient as warning smell, the antioxidant and anticorrosive performance is poor, the natural gas combustion cannot be induced in the aspect of use, the volatilization performance of liquid is insufficient as odor warning, and the good warning volatilization effect cannot be achieved.
Disclosure of Invention
The invention aims to solve the defects that the existing sulfur-free odorant has single component and is insufficient as warning odor, the antioxidant and anticorrosive performance is poor, the natural gas cannot be catalyzed to burn in use, the liquid has insufficient volatility and cannot play a good warning effect in odor warning.
In order to achieve the purpose, the invention adopts the following technical scheme:
the natural gas sulfur-free odorizing agent comprises the following raw materials in percentage by weight: 20-23% of methyl acrylate, 28-31% of ethyl acrylate, 2-5% of 3-ethyl-2-methylpyrazine, 10-13% of n-butyl acetate, 10-13% of isopropyl tri-10%, 12-14% of a hydrocarbon mixture and the balance of ozone;
the hydrocarbon mixture includes any two of methane, ethane, propane, and butane.
Preferably, the composition comprises the following raw materials in percentage by weight: 22-23% of methyl acrylate, 29-30% of ethyl acrylate, 3-ethyl-2-methylpyrazine, 11-13% of n-butyl acetate, 11-13% of isopropyl tri-11, 13-14% of hydrocarbon mixture and the balance of ozone.
Preferably, the composition comprises the following raw materials in percentage by weight: 23% of methyl acrylate, 30% of ethyl acrylate, 4% of 3-ethyl-2-methylpyrazine, 12% of n-butyl acetate, 12% of isopropyl tri-12%, 14% of a hydrocarbon mixture and 5% of ozone.
Preferably, the preparation method of the hydrocarbon mixture comprises the following steps:
firstly, preparing any two of methane, ethane, propane and butane, and filling the two into a mixer for mixing;
secondly, setting the mixing temperature at 30-35 ℃, and stirring for 20-30min under the condition of 300-;
thirdly, a hydrocarbon mixture is obtained and collected.
Preferably, the preparation method comprises the following steps:
s1: firstly, taking methyl acrylate, ethyl acrylate and 3-ethyl-2-methylpyrazine as basic raw materials, mixing and collecting;
s2: mixing n-butyl acetate and isopropyl tri-acetate as antioxidant preservative, and collecting;
s3: mixing the hydrocarbon mixture and ozone into a gas mixture and collecting the gas mixture;
s4: mixing the base material with an antioxidant preservative to obtain a mixed liquid;
s5: introducing the gas mixture into the mixed liquid through a pipeline, and continuously stirring;
s6: the sulfur-free odorant is prepared.
Preferably, in S1, methyl acrylate, ethyl acrylate and 3-ethyl-2-methylpyrazine are mixed, the mixing temperature is set to be 35-40 ℃, and stirring is carried out for 25-30min under the condition of 200-260 r/min.
Preferably, in S2, n-butyl acetate and isopropyl are mixed together, the mixing temperature is set to be 35-40 ℃, and stirring is carried out for 15-20min under the condition of 200-260 r/min.
Preferably, in S3, the hydrocarbon mixture is mixed with ozone, the mixing temperature is set to be 30-35 ℃, and the mixture is stirred for 10-15min under the condition of 300-360 r/min.
Preferably, in S4, the base material prepared by mixing methyl acrylate, ethyl acrylate and 3-ethyl-2-methylpyrazine is mixed with the antioxidant preservative prepared by mixing n-butyl acetate and isopropyl tri-butyl acetate, the mixing temperature is set to be 35-40 ℃, and the mixture is stirred for 20-25min under the condition of 300-360r/min, so as to obtain the mixed liquid.
Preferably, in S5, the gas mixture prepared by mixing the hydrocarbon mixture and the ozone is finally introduced into the mixed liquid by means of pipeline aeration, the mixing temperature is set to be 30-35 ℃, and the mixture is stirred for 20-25min under the condition of 300-360 r/min.
Compared with the prior art, the invention has the advantages that:
according to the scheme, n-butyl acetate and isopropyl acetate are added in the original odorizing agent, so that the odorizing agent has good oxidation and corrosion resistance, can improve the oxidation and corrosion resistance of the odorizing agent by mixing, reduces the corrosion degree of a natural gas pipeline, is flammable and is convenient to burn and use;
the hydrocarbon mixture is added in the original odorizing agent, so that the odor taste of the odorizing agent can be improved, the gas volatilization effect is better than that of liquid, and the early warning performance is improved;
this scheme has increased ozone in original odorant, can play combustion-supporting effect when the natural gas uses the burning on the one hand, and on the other hand ozone is coloured gas, can direct observation when the natural gas leakage appears, further improves the early warning effect.
The invention improves the oxidation and corrosion resistance of the odorant, improves the volatility and the combustion-supporting performance, and can play a good warning effect.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Example one
The natural gas sulfur-free odorizing agent comprises the following raw materials in percentage by weight: 22% of methyl acrylate, 28% of ethyl acrylate, 2% of 3-ethyl-2-methylpyrazine, 14% of n-butyl acetate, 14% of isopropyl tri-14%, 16% of a hydrocarbon mixture and 6% of ozone;
the hydrocarbon mixture comprises methane and ethane.
In a specific implementation scenario, the hydrocarbon mixture is prepared in a manner that includes the following steps:
firstly, preparing methane and ethane, and filling the methane and the ethane into a mixer for mixing;
secondly, setting the mixing temperature to be 30 ℃, and stirring for 20min under the condition of 300 r/min;
thirdly, a hydrocarbon mixture is obtained and collected.
Preferably, the preparation method comprises the following steps:
s1: firstly, taking methyl acrylate, ethyl acrylate and 3-ethyl-2-methylpyrazine as basic raw materials, mixing and collecting;
s2: mixing n-butyl acetate and isopropyl tri-acetate as antioxidant preservative, and collecting;
s3: mixing the hydrocarbon mixture and ozone into a gas mixture and collecting the gas mixture;
s4: mixing the base material with an antioxidant preservative to obtain a mixed liquid;
s5: introducing the gas mixture into the mixed liquid through a pipeline, and continuously stirring;
s6: the sulfur-free odorant is prepared.
In a specific implementation scenario, in S1, methyl acrylate, ethyl acrylate, and 3-ethyl-2-methylpyrazine are mixed, the mixing temperature is set to 35 ℃, and stirring is performed at 200r/min for 25 min.
In a specific implementation scenario, in S2, n-butyl acetate and isopropyl acetate are mixed, the mixing temperature is set to 35 ℃, and stirring is performed at 200r/min for 15 min.
In a specific implementation scenario, in S3, the hydrocarbon mixture is mixed with ozone, the mixing temperature is set at 30 ℃, and the mixture is stirred for 10min at 3000 r/min.
In a specific implementation scenario, in S4, a base material prepared by mixing methyl acrylate, ethyl acrylate, and 3-ethyl-2-methylpyrazine is mixed with an antioxidant preservative prepared by mixing n-butyl acetate and isopropyl acetate, the mixing temperature is set to 35 ℃, and the mixture is stirred for 20min at 300r/min, so as to obtain a mixed liquid.
In a specific implementation scenario, in S5, the gas mixture prepared by mixing the hydrocarbon mixture and ozone is finally introduced into the mixed liquid by way of pipeline ventilation, the mixing temperature is set at 30 ℃, and the mixture is stirred for 20min at 300 r/min.
Example two
The natural gas sulfur-free odorizing agent comprises the following raw materials in percentage by weight: 24% of methyl acrylate, 32% of ethyl acrylate, 6% of 3-ethyl-2-methylpyrazine, 12% of n-butyl acetate, 12% of isopropyl tri-12%, 12% of a hydrocarbon mixture and 2% of ozone;
the hydrocarbon mixture includes propane and butane.
In a specific implementation scenario, the hydrocarbon mixture is prepared in a manner that includes the following steps:
firstly, preparing propane and butane, and filling the propane and the butane into a mixer for mixing;
secondly, setting the mixing temperature to be 33 ℃, and stirring for 25min under the condition of 340 r/min;
thirdly, a hydrocarbon mixture is obtained and collected.
Preferably, the preparation method comprises the following steps:
s1: firstly, taking methyl acrylate, ethyl acrylate and 3-ethyl-2-methylpyrazine as basic raw materials, mixing and collecting;
s2: mixing n-butyl acetate and isopropyl tri-acetate as antioxidant preservative, and collecting;
s3: mixing the hydrocarbon mixture and ozone into a gas mixture and collecting the gas mixture;
s4: mixing the base material with an antioxidant preservative to obtain a mixed liquid;
s5: introducing the gas mixture into the mixed liquid through a pipeline, and continuously stirring;
s6: the sulfur-free odorant is prepared.
In a specific implementation scenario, in S1, methyl acrylate, ethyl acrylate, and 3-ethyl-2-methylpyrazine are mixed, the mixing temperature is set at 33 ℃, and stirring is performed at 220r/min for 28 min.
In a specific implementation scenario, in S2, n-butyl acetate and isopropyl acetate are mixed, the mixing temperature is set to 38 ℃, and stirring is performed at 220r/min for 18 min.
In a specific implementation scenario, in S3, the hydrocarbon mixture is mixed with ozone, the mixing temperature is set at 33 ℃, and the mixture is stirred for 12min at 340 r/min.
In a specific implementation scenario, in S4, a base material prepared by mixing methyl acrylate, ethyl acrylate, and 3-ethyl-2-methylpyrazine is mixed with an antioxidant preservative prepared by mixing n-butyl acetate and isopropyl acetate, the mixing temperature is set to 38 ℃, and the mixture is stirred for 22min at 340r/min, so as to obtain a mixed liquid.
In a specific implementation scenario, in S5, the gas mixture prepared by mixing the hydrocarbon mixture and ozone is finally introduced into the mixed liquid by way of pipeline ventilation, the mixing temperature is set at 33 ℃, and the mixture is stirred for 22min at 340 r/min.
EXAMPLE III
The natural gas sulfur-free odorizing agent comprises the following raw materials in percentage by weight: comprises the following raw materials in percentage by weight: 23% of methyl acrylate, 30% of ethyl acrylate, 4% of 3-ethyl-2-methylpyrazine, 12% of n-butyl acetate, 12% of isopropyl tri-12%, 16% of a hydrocarbon mixture and 3% of ozone;
the hydrocarbon mixture comprises methane and propane.
In a specific implementation scenario, the hydrocarbon mixture is prepared in a manner that includes the following steps:
firstly, preparing methane and propane, and filling the methane and the propane into a mixer for mixing;
secondly, setting the mixing temperature to be 35 ℃, and stirring for 30min under the condition of 60 r/min;
thirdly, a hydrocarbon mixture is obtained and collected.
Preferably, the preparation method comprises the following steps:
s1: firstly, taking methyl acrylate, ethyl acrylate and 3-ethyl-2-methylpyrazine as basic raw materials, mixing and collecting;
s2: mixing n-butyl acetate and isopropyl tri-acetate as antioxidant preservative, and collecting;
s3: mixing the hydrocarbon mixture and ozone into a gas mixture and collecting the gas mixture;
s4: mixing the base material with an antioxidant preservative to obtain a mixed liquid;
s5: introducing the gas mixture into the mixed liquid through a pipeline, and continuously stirring;
s6: the sulfur-free odorant is prepared.
In a specific implementation scenario, in S1, methyl acrylate, ethyl acrylate, and 3-ethyl-2-methylpyrazine are mixed, the mixing temperature is set to 40 ℃, and stirring is performed at 260r/min for 30 min.
In a specific implementation scenario, in S2, n-butyl acetate and isopropyl acetate are mixed, the mixing temperature is set to 40 ℃, and stirring is performed at 260r/min for 20 min.
In a specific implementation scenario, in S3, the hydrocarbon mixture is mixed with ozone, the mixing temperature is set at 35 ℃, and the mixture is stirred for 15min at 360 r/min.
In a specific implementation scenario, in S4, a base material prepared by mixing methyl acrylate, ethyl acrylate, and 3-ethyl-2-methylpyrazine is mixed with an antioxidant preservative prepared by mixing n-butyl acetate and isopropyl acetate, the mixing temperature is set to 40 ℃, and the mixture is stirred for 25min at 360r/min to obtain a mixed liquid.
In a specific implementation scenario, in S5, the gas mixture prepared by mixing the hydrocarbon mixture and ozone is finally introduced into the mixed liquid by way of pipeline ventilation, the mixing temperature is set to 35 ℃, and the mixture is stirred for 25min at 360 r/min.
Comparative example 1
A natural gas sulfur-free odorizing agent in this comparative example, which differs from example 1 only in that: comprises the following raw materials in percentage by weight: 32% of methyl acrylate, 38% of ethyl acrylate, 10% of 3-ethyl-2-methylpyrazine, 16% of a hydrocarbon mixture and 6% of ozone.
Comparative example No. two
A natural gas sulfur-free odorizing agent in this comparative example, which differs from example 2 only in that: comprises the following raw materials in percentage by weight: 27% of methyl acrylate, 39% of ethyl acrylate, 6% of 3-ethyl-2-methylpyrazine, 16% of n-butyl acetate, 16% of isopropyl tri-16% and 2% of ozone.
Comparative example No. three
A natural gas sulfur-free odorizing agent in this comparative example, which differs from example 3 only in that: comprises the following raw materials in percentage by weight: comprises the following raw materials in percentage by weight: 25% of methyl acrylate, 31% of ethyl acrylate, 4% of 3-ethyl-2-methylpyrazine, 12% of n-butyl acetate, 12% of isopropyl tri-12% and 16% of a hydrocarbon mixture.
Test examples
The prepared natural gas sulfur-free odorizing agent is used as a test sample in examples 1-3 and comparative examples 1-3, and the odor performance, the oxidation resistance and the combustion-supporting performance in a natural gas combustion chamber are detected;
detecting odor by adopting an odor detector;
adopting an anti-oxidation detector to compare and detect the oxidation and anti-oxidation performance of the odorizing agent in the natural gas pipeline;
observing the combustion of the natural gas added with the odorous agent, detecting the combustion exhaust gas, and judging the combustion-supporting performance:
the above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The natural gas sulfur-free odorizing agent is characterized by comprising the following raw materials in percentage by weight: 20-23% of methyl acrylate, 28-31% of ethyl acrylate, 2-5% of 3-ethyl-2-methylpyrazine, 10-13% of n-butyl acetate, 10-13% of isopropyl tri-10%, 12-14% of a hydrocarbon mixture and the balance of ozone;
the hydrocarbon mixture includes any two of methane, ethane, propane, and butane.
2. The natural gas sulfur-free odorizing agent according to claim 1, which comprises the following raw materials in percentage by weight: 22-23% of methyl acrylate, 29-30% of ethyl acrylate, 3-ethyl-2-methylpyrazine, 11-13% of n-butyl acetate, 11-13% of isopropyl tri-11, 13-14% of hydrocarbon mixture and the balance of ozone.
3. The natural gas sulfur-free odorizing agent according to claim 1, which comprises the following raw materials in percentage by weight: 23% of methyl acrylate, 30% of ethyl acrylate, 4% of 3-ethyl-2-methylpyrazine, 12% of n-butyl acetate, 12% of isopropyl tri-12%, 14% of a hydrocarbon mixture and 5% of ozone.
4. The natural gas sulfur-free odorizing agent according to claim 1, wherein the hydrocarbon mixture is prepared by the following steps:
firstly, preparing any two of methane, ethane, propane and butane, and filling the two into a mixer for mixing;
secondly, setting the mixing temperature at 30-35 ℃, and stirring for 20-30min under the condition of 300-;
thirdly, a hydrocarbon mixture is obtained and collected.
5. The natural gas sulfur-free odorizing agent according to claim 1, which is prepared in a manner comprising the steps of:
s1: firstly, taking methyl acrylate, ethyl acrylate and 3-ethyl-2-methylpyrazine as basic raw materials, mixing and collecting;
s2: mixing n-butyl acetate and isopropyl tri-acetate as antioxidant preservative, and collecting;
s3: mixing the hydrocarbon mixture and ozone into a gas mixture and collecting the gas mixture;
s4: mixing the base material with an antioxidant preservative to obtain a mixed liquid;
s5: introducing the gas mixture into the mixed liquid through a pipeline, and continuously stirring;
s6: the sulfur-free odorant is prepared.
6. The natural gas sulfur-free odorizing agent as claimed in claim 5, wherein in the step S1, methyl acrylate, ethyl acrylate and 3-ethyl-2-methylpyrazine are mixed, the mixing temperature is set to be 35-40 ℃, and the mixture is stirred for 25-30min under the condition of 200-260 r/min.
7. The natural gas sulfur-free odorizing agent as claimed in claim 5, wherein in the step S2, n-butyl acetate and isopropyl are mixed, the mixing temperature is set to be 35-40 ℃, and the mixture is stirred for 15-20min under the condition of 200-260 r/min.
8. The natural gas sulfur-free odorizing agent as claimed in claim 5, wherein in the step S3, the hydrocarbon mixture is mixed with ozone, the mixing temperature is set to be 30-35 ℃, and the mixture is stirred for 10-15min under the condition of 300-360 r/min.
9. The natural gas sulfur-free odorant according to claim 5, wherein in S4, a base material prepared by mixing methyl acrylate, ethyl acrylate and 3-ethyl-2-methylpyrazine is mixed with an antioxidant preservative prepared by mixing n-butyl acetate and isopropyl acetate, the mixing temperature is set to 35-40 ℃, and the mixture is stirred for 20-25min at 360r/min of 300-.
10. The natural gas sulfur-free odorizing agent according to claim 5, wherein in the step S5, the gas mixture prepared by mixing the hydrocarbon mixture and the ozone is finally introduced into the mixed liquid by means of pipeline ventilation, the mixing temperature is set to be 30-35 ℃, and the mixture is stirred for 20-25min under the condition of 360r/min and 300-.
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| CN202110818460.5A CN113528208A (en) | 2021-07-20 | 2021-07-20 | Natural gas sulfur-free odorizing agent |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113956904A (en) * | 2021-11-25 | 2022-01-21 | 沈阳光正工业有限公司 | Sulfur-free odor additive for combustible gas and preparation method thereof |
| CN115057764A (en) * | 2022-06-30 | 2022-09-16 | 辽宁厚安科技有限公司 | Polymerization inhibitor for sulfur-free odorizing agent |
| CN115125046A (en) * | 2022-06-23 | 2022-09-30 | 辽宁厚安科技有限公司 | Sulfur-free odorizing agent for natural gas |
| CN115340848A (en) * | 2022-07-27 | 2022-11-15 | 湖北瑞能华辉能源管理有限公司 | Hydrocarbon refrigerant with warning effect and application thereof |
-
2021
- 2021-07-20 CN CN202110818460.5A patent/CN113528208A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113956904A (en) * | 2021-11-25 | 2022-01-21 | 沈阳光正工业有限公司 | Sulfur-free odor additive for combustible gas and preparation method thereof |
| CN115125046A (en) * | 2022-06-23 | 2022-09-30 | 辽宁厚安科技有限公司 | Sulfur-free odorizing agent for natural gas |
| CN115057764A (en) * | 2022-06-30 | 2022-09-16 | 辽宁厚安科技有限公司 | Polymerization inhibitor for sulfur-free odorizing agent |
| CN115340848A (en) * | 2022-07-27 | 2022-11-15 | 湖北瑞能华辉能源管理有限公司 | Hydrocarbon refrigerant with warning effect and application thereof |
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