CN111056897A - Yellow oil inhibitor for caustic tower in methanol-to-olefin process - Google Patents

Yellow oil inhibitor for caustic tower in methanol-to-olefin process Download PDF

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CN111056897A
CN111056897A CN201811206984.3A CN201811206984A CN111056897A CN 111056897 A CN111056897 A CN 111056897A CN 201811206984 A CN201811206984 A CN 201811206984A CN 111056897 A CN111056897 A CN 111056897A
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parts
alkali
butter
butter inhibitor
inhibitor
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CN111056897B (en
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王洪涛
齐国祯
王莉
金永明
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China Petroleum and Chemical Corp
Sinopec Shanghai Research Institute of Petrochemical Technology
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China Petroleum and Chemical Corp
Sinopec Shanghai Research Institute of Petrochemical Technology
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
    • C07C1/20—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as heteroatoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/20—Use of additives, e.g. for stabilisation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2529/00—Catalysts comprising molecular sieves
    • C07C2529/82—Phosphates
    • C07C2529/84—Aluminophosphates containing other elements, e.g. metals, boron
    • C07C2529/85—Silicoaluminophosphates (SAPO compounds)
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P30/00—Technologies relating to oil refining and petrochemical industry
    • Y02P30/20—Technologies relating to oil refining and petrochemical industry using bio-feedstock
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P30/00—Technologies relating to oil refining and petrochemical industry
    • Y02P30/40—Ethylene production

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Abstract

The invention relates to a butter inhibitor for an alkaline washing tower in a methanol-to-olefin process, which mainly solves the problem of more butter in the alkaline washing tower in the prior art. The invention adopts a methanol-to-olefin process alkaline washing tower butter inhibitor, which comprises the following components in parts by weight: 5-40 parts of amine compounds, 1-20 parts of sulfate compounds, 1-20 parts of alcohol compounds, 1-20 parts of surfactants and 0.1-5 parts of corrosion inhibitors; the butter inhibitor is added into an alkaline tower of the methanol-to-olefin process to inhibit the generation of butter, and the technical scheme that the butter inhibitor is added into the alkaline tower of the methanol-to-olefin process in an amount of 20-200 ppm better solves the problems and can be used for inhibiting the butter in the alkaline tower of the methanol-to-olefin process.

Description

Yellow oil inhibitor for caustic tower in methanol-to-olefin process
Technical Field
The invention relates to a yellow oil inhibitor for an alkaline washing tower in a methanol-to-olefin process.
Background
Methanol-To-Olefin (MTO) refers To a technology for producing Methanol from natural gas or coal as a raw material through synthesis gas, and then the Methanol generates low-carbon olefins such as ethylene, propylene and the like under the action of a catalyst. The MTO technology develops a new process route for preparing chemical products from unconventional petroleum resources, and becomes a research focus for synthesizing olefin from the unconventional petroleum resources.
In an olefin recovery system of an MTO process technology, alkaline washing technology is mostly adopted at home and abroad to remove H in MTO product gas2S、CO2And the like. Under the strong alkaline environment, firstly, oxygen-containing compounds such as aldehyde, ketone and the like in the product gas can generate Aldol condensation reaction to generate a polymer; and secondly, unsaturated olefin in the product gas also undergoes free radical polymerization, and the polymers are condensed in alkali liquor to form yellow water type alkaline emulsion, namely butter, which is converted into high polymer by heating or oxidizing.
When the acid gas in the pyrolysis gas is removed by an alkali washing method, in order to improve the utilization rate of alkali liquor, multi-section alkali washing is adopted, for example, two-section or three-section alkali washing is mostly adopted in an ethylene device. If a large amount of butter is generated in the alkaline washing system, the tower pressure of the alkaline washing tower is directly increased, the alkaline washing efficiency is reduced, and the waste alkali discharge is increased, so that the COD (chemical oxygen demand) of downstream waste alkali treatment exceeds the standard, a large amount of alkaline liquor is consumed, and meanwhile, a large amount of butter is easy to polymerize and scale to block a distributor and a filler in the tower, so that the tower blockage phenomenon is caused, and the operation period of the alkaline washing tower is shortened. In addition, the discharge of waste alkali containing a large amount of butter brings difficulty to the operation of downstream processing facilities.
Research and analysis show that the product gas of the MTO device contains a small amount of oxygen-containing compounds which have strong activity and are easy to react and polymerize at high temperature, namely, under the action of NaOH, two molecules of oxygen-containing compounds such as aldehyde, ketone and the like with active hydrogen atoms on α -site carbon atoms are subjected to addition reaction to generate β -hydroxyl products, and then the products are further added to a polymer with certain molecular weight.
The production of the grease in the alkaline washing tower is generally reduced by optimizing the process conditions and adding measures such as a grease inhibitor. CN101348410A proposes a method for preparing a butter inhibitor by using a three-component mixture of an alcamine compound, a hydrazide compound and an alkylamine compound, which can inhibit the generation of butter in an alkaline washing tower of an ethylene plant to a certain extent. CN106467444A proposes a butter inhibitor prepared from an amine compound and an alcohol compound, which inhibits aldehyde ketone condensation and olefin cross-linking polymerization in a system to a certain extent.
The MTO reaction process is different from the traditional steam cracking ethylene process in essence, the product contains more oxygen-containing compounds, and the reason for generating butter is different. Meanwhile, the existing grease inhibitor of the MTO alkaline washing tower also has the problems of unstable use effect, large injection amount, high cost and the like.
The invention solves the problem in a targeted way.
Disclosure of Invention
The invention aims to solve the technical problem of more butter in the prior art, and provides a novel butter inhibitor for an alkaline washing tower in a methanol-to-olefin process and a method for inhibiting butter generation by using the same. The method is used for inhibiting the butter of the alkaline washing tower in the process of preparing the olefin from the methanol, and has the advantage of less butter generation amount.
In order to solve one of the problems, the technical scheme adopted by the invention is as follows: a yellow oil inhibitor for a caustic tower in a methanol-to-olefin process comprises the following components in parts by mass: 5-40 parts of amine compounds, 1-20 parts of sulfate compounds, 1-20 parts of alcohol compounds, 1-20 parts of surfactants and 0.1-5 parts of corrosion inhibitors.
Wherein the amine compound is one or a mixture of more of diethylenetriamine, triethylene tetramine and N, N-diethylhydroxylamine; the sulfate compounds are sodium sulfite, sodium bisulfite and sodium thiosulfate; the alcohol compounds are ethylene glycol, propylene glycol and butanediol; the surfactant is sodium dodecyl benzene sulfonate, sodium polyacrylate and alkylphenol polyoxyethylene; the corrosion inhibitor is sodium phosphate.
In the above technical solution, preferably, the amine compound is at least one of diethylenetriamine and N, N-diethylhydroxylamine; the sulfate compound is sodium thiosulfate; the alcohol compound is propylene glycol; the surfactant is alkylphenol polyoxyethylene.
In the above technical scheme, preferably, the butter inhibitor comprises the following components in parts by mass: 10-30 parts of amine compounds, 2-10 parts of sulfate compounds, 5-15 parts of alcohol compounds, 2-10 parts of surfactants and 0.5-3 parts of corrosion inhibitors.
In the above technical solution, more preferably, the amine compound is a mixture of diethylenetriamine and N, N-diethylhydroxylamine.
In the above technical solution, more preferably, the mass ratio of diethylenetriamine to N, N-diethylhydroxylamine is (0.5-10): 1.
in the technical scheme, preferably, the amine compound, the sulfate compound, the alcohol compound, the surfactant and the corrosion inhibitor are uniformly dispersed in deionized water to form a stable solution system, and the components are cooperatively used together to achieve an unexpected synergistic effect of inhibiting butter in an alkaline washing tower of a methanol-to-olefin device.
In order to solve the second problem, the invention adopts the following technical scheme: the butter inhibitor is added into an alkaline tower of the methanol-to-olefin process to inhibit the generation of butter, and the amount of the butter inhibitor added into the alkaline tower of the methanol-to-olefin process is 20-200 ppm.
In the above technical scheme, preferably, the butter inhibitor is continuously injected on a strong alkali, medium alkali and weak alkali circulating alkali line of the alkali washing tower.
In the above technical solution, preferably, the mass content of the aldehyde ketone in the product gas at the inlet of the caustic tower of the methanol-to-olefin separation unit is less than 300 ppm.
In the patent, Methanol To Olefin (MTO) is converted into a product gas containing ethylene and propylene at high selectivity based on a SAPO-34 molecular sieve catalyst and a catalyst continuous reaction-regeneration fluidization technology, and the product gas enters a product gas compressor after being cooled, subjected to catalyst fine powder removal and water removal. Generally, four-stage compression is adopted, an oxide water washing tower and a caustic washing tower are arranged at a third-stage compression outlet, and the operating conditions of the caustic washing tower are as follows: the temperature of the alkaline washing tower is about 42 ℃, and the pressure of the alkaline washing tower is about 1.3 MPaG. The product gas firstly enters an oxide water washing tower, and enters an alkali washing tower after entrained oxygen-containing compounds are removed, so that acidic substances and oxygen-containing compounds are further removed.
According to the method, the grease inhibitor is injected into the alkaline tower of the methanol-to-olefin process, the generation amount of grease in the alkaline tower is inhibited, amine compounds, sulfate compounds, alcohol compounds, surfactants, corrosion inhibitors and other different functional components in the grease inhibitor are adopted, all the components are in synergistic effect, the remarkable inhibition effect is achieved on the polymerization of oxides and the free radical polymerization in a targeted manner, the good dispersion solubilization effect is achieved on the generated grease, the problem that much grease exists in the alkaline tower of the MTO process is effectively solved, the mass content of polymers in the alkaline solution can be reduced to 0.14%, the pressure difference of the alkaline tower can reach 23kPa, and the good technical effect is achieved.
The present invention will be further illustrated by the following examples, but is not limited to these examples.
Detailed Description
Comparative example 1
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, no butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkaline liquor of the MTO alkaline washing system, the device is operated for 168 hours, sampling is carried out for analysis, the polymer content in the alkaline liquor is calculated, the polymer content in the alkaline liquor reaches 1.75%, and the pressure difference of the alkaline washing tower is increased to 51 kPa.
[ example 1 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 25 parts of diethylenetriamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol polyoxyethylene and 1 part of sodium phosphate, wherein the butter inhibitor is prepared by sequentially adding the butter inhibitor into 47 parts of deionized water in a stirring kettle, and stirring for 2 hours at 20 ℃. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.29 percent, and the pressure difference of the alkali washing tower is increased to 28 kPa.
[ example 2 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 25 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol polyoxyethylene and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle, and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the polymer content in the alkali liquor is calculated after sampling and analyzing. The polymer content in the alkali liquor reaches 0.46 percent, and the pressure difference of the alkali washing tower is increased to 32 kPa.
[ example 3 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 25 parts of triethylene tetramine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol polyoxyethylene and 1 part of sodium phosphate, wherein the butter inhibitor component is sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the polymer content in the alkali liquor is calculated after sampling and analyzing. The polymer content in the alkali liquor reaches 0.35 percent, and the pressure difference of the alkali washing tower is increased to 30 kPa.
[ example 4 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the polymer content in the alkali liquor is calculated after sampling and analyzing. The polymer content in the alkali liquor reaches 0.17%, and the pressure difference of the alkali washing tower is increased to 24 kPa.
[ example 5 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium sulfite, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol polyoxyethylene and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the polymer content in the alkali liquor is calculated after sampling and analyzing. The polymer content in the alkali liquor reaches 0.27%, and the pressure difference of the alkali washing tower is increased to 28 kPa.
[ example 6 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium bisulfite, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol polyoxyethylene and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.29 percent, and the pressure difference of the alkali washing tower is increased to 28 kPa.
[ example 7 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of ethylene glycol, 8 parts of alkylphenol polyoxyethylene and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.28 percent, and the pressure difference of the alkali washing tower is increased to 29 kPa.
[ example 8 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of butanediol, 8 parts of alkylphenol polyoxyethylene and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.29 percent, and the pressure difference of the alkali washing tower is increased to 29 kPa.
[ example 9 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of sodium dodecyl benzene sulfonate and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.30 percent, and the pressure difference of the alkali washing tower is increased to 29 kPa.
[ example 10 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 6 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of sodium polyacrylate and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.29 percent, and the pressure difference of the alkali washing tower is increased to 28 kPa.
[ example 11 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 4 parts of diethylenetriamine, 1 part of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.74 percent, and the pressure difference of the alkali washing tower is increased to 38 kPa.
[ example 12 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 8 parts of diethylenetriamine, 2 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.39%, and the pressure difference of the alkali washing tower is increased to 32 kPa.
[ example 13 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 24 parts of diethylenetriamine, 6 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.16%, and the pressure difference of the alkali washing tower is increased to 23 kPa.
[ example 14 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 32 parts of diethylenetriamine, 8 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.14 percent, and the pressure difference of the alkali washing tower is increased to 23 kPa.
[ example 15 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 1 part of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.54 percent, and the pressure difference of the alkali washing tower is increased to 35 kPa.
[ example 16 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 2 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.38%, and the pressure difference of the alkali washing tower is increased to 32 kPa.
[ example 17 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 10 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.16%, and the pressure difference of the alkali washing tower is increased to 24 kPa.
[ example 18 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 20 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.15%, and the pressure difference of the alkali washing tower is increased to 24 kPa.
[ example 19 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 1, 2-propylene glycol, 8 parts of alkylphenol polyoxyethylene and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.27%, and the pressure difference of the alkali washing tower is increased to 28 kPa.
[ example 20 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 5 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.19%, and the pressure difference of the alkali washing tower is increased to 26 kPa.
[ example 21 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 15 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.17%, and the pressure difference of the alkali washing tower is increased to 23 kPa.
[ example 22 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 20 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.16%, and the pressure difference of the alkali washing tower is increased to 23 kPa.
[ example 23 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 1 part of alkylphenol ethoxylate and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.30 percent, and the pressure difference of the alkali washing tower is increased to 29 kPa.
[ example 24 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 2 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.25%, and the pressure difference of the alkali washing tower is increased to 27 kPa.
[ example 25 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 10 parts of alkylphenol polyoxyethylene and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.17%, and the pressure difference of the alkali washing tower is increased to 23 kPa.
[ example 26 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 20 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.16%, and the pressure difference of the alkali washing tower is increased to 23 kPa.
[ example 27 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 0.1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.17%, and the pressure difference of the alkali washing tower is increased to 25 kPa.
[ example 28 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 0.5 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.17%, and the pressure difference of the alkali washing tower is increased to 25 kPa.
[ example 29 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 3 parts of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.16%, and the pressure difference of the alkali washing tower is increased to 24 kPa.
[ example 30 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 5 parts of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.16%, and the pressure difference of the alkali washing tower is increased to 24 kPa.
[ example 31 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 10 parts of diethylenetriamine, 15 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.22%, and the pressure difference of the alkali washing tower is increased to 26 kPa.
[ example 32 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 22.5 parts of diethylenetriamine, 2.5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.25%, and the pressure difference of the alkali washing tower is increased to 27 kPa.
[ example 33 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 5 parts of diethylenetriamine, 20 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.30 percent, and the pressure difference of the alkali washing tower is increased to 28 kPa.
TABLE 1
Figure BDA0001831478850000131
Figure BDA0001831478850000141
Figure BDA0001831478850000151
Figure BDA0001831478850000161
[ example 34 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 20ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.80 percent, and the pressure difference of the alkali washing tower is increased to 39 kPa.
[ example 35 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the added butter inhibitor product is 200ppm, the device is operated for 168 hours, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.13%, and the pressure difference of the alkali washing tower is increased to 23 kPa.
[ example 36 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 500h, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.19%, and the pressure difference of the alkali washing tower is increased to 27 kPa.
[ example 37 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 30ppm, and a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, wherein the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.11%, and the pressure difference of the alkali washing tower is increased to 23 kPa.
[ example 38 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 300ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.48 percent, and the pressure difference of the alkali washing tower is increased to 33 kPa.
[ example 39 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 20 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.13%, and the pressure difference of the alkali washing tower is increased to 23 kPa.
[ example 40 ]
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 90 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.32%, and the pressure difference of the alkali washing tower is increased to 30 kPa.
Comparative example 2
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol polyoxyethylene and 1 part of sodium phosphate, and the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 1.25%, and the pressure difference of the alkali washing tower is increased to 42 kPa.
Comparative example 3
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol polyoxyethylene and 1 part of sodium phosphate, wherein the butter inhibitor components are sequentially added into 47 parts of deionized water in a stirring kettle, and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.78%, and the pressure difference of the alkali washing tower is increased to 38 kPa.
Comparative example 4
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 8 parts of alkylphenol polyoxyethylene and 1 part of sodium phosphate, wherein the butter inhibitor is prepared by sequentially adding the butter inhibitor into 47 parts of deionized water in a stirring kettle, and stirring for 2 hours at 20 ℃. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.35 percent, and the pressure difference of the alkali washing tower is increased to 31 kPa.
Comparative example 5
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol and 1 part of sodium phosphate, wherein the butter inhibitor component is sequentially added into 47 parts of deionized water in a stirring kettle and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.38%, and the pressure difference of the alkali washing tower is increased to 32 kPa.
Comparative example 6
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass: 20 parts of diethylenetriamine, 5 parts of N, N-diethylhydroxylamine, 8 parts of sodium thiosulfate, 12 parts of 1, 2-propylene glycol and 8 parts of alkylphenol polyoxyethylene, wherein the butter inhibitor component is sequentially added into 47 parts of deionized water in a stirring kettle, and stirred for 2 hours at the temperature of 20 ℃ to obtain a butter inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.17%, and the pressure difference of the alkali washing tower is increased to 25 kPa.
Comparative example 7
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 300ppm, a special HK-1312 type butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkaline liquid of the alkaline washing tower, the mass content of the added butter inhibitor is 120ppm, the device is operated for 168 hours, sampling is carried out for analysis, the polymer content in the alkaline liquid is calculated, the polymer content in the alkaline liquid reaches 1.77%, and the pressure difference of the alkaline washing tower is increased to 52 kPa.
Comparative example 8
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 300ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass according to the composition of example 14 in CN 101591214A: 20 parts of monoethanolamine, 20 parts of N, N-diethylhydroxylamine, 10 parts of sodium thiosulfate and 50 parts of deionized water. Sequentially adding the components into a stirring kettle, and stirring for 2 hours at the temperature of 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 120ppm, the device is operated for 168 hours, sampling is carried out for analysis, the polymer content in the alkali liquor is calculated, the polymer content in the alkali liquor reaches 1.60 percent, the pressure difference of the alkali washing tower is increased to 50kPa, the alkali circulation volume of each section is reduced, and the long-period stable operation of the device is seriously influenced.
Comparative example 9
The mass content of acetaldehyde in product gas at the inlet of an alkaline washing tower of an MTO alkaline washing system is 300ppm, a butter inhibitor is injected into circulating strong alkali, medium alkali and weak alkali liquor of the alkaline washing tower, and the butter inhibitor comprises the following components in parts by mass according to the composition of example 1 in CN 106467444A: 40 parts of isopropyl hydroxylamine, 25 parts of isopropanol and 260 parts of deionized water. Sequentially adding the components into a stirring kettle, and stirring for 2 hours at the temperature of 20 ℃ to obtain the butter inhibitor. The mass content of the butter inhibitor is 120ppm, the device is operated for 168 hours, sampling is carried out for analysis, the polymer content in the alkali liquor is calculated, the polymer content in the alkali liquor reaches 0.61%, the pressure difference of the alkaline tower is increased to 37kPa, and the effect is lower than that of the embodiment of the invention.
Obviously, by adopting the method of the invention, the polymer content in the alkali liquor can be obviously reduced and the pressure difference of the alkali washing tower is stabilized by injecting the butter inhibitor into the alkali washing tower, thus having great technical advantages.

Claims (10)

1. A yellow oil inhibitor for a caustic tower in a methanol-to-olefin process comprises the following components in parts by mass: 5-40 parts of amine compounds, 1-20 parts of sulfate compounds, 1-20 parts of alcohol compounds, 1-20 parts of surfactants and 0.1-5 parts of corrosion inhibitors.
2. The yellow oil inhibitor for the alkaline tower in the process of preparing olefin from methanol according to claim 1, wherein the amine compound is one or a mixture of diethylenetriamine, triethylene tetramine and N, N-diethylhydroxylamine; the sulfate compounds are sodium sulfite, sodium bisulfite and sodium thiosulfate; the alcohol compounds are ethylene glycol, propylene glycol and butanediol; the surfactant is sodium dodecyl benzene sulfonate, sodium polyacrylate and alkylphenol polyoxyethylene; the corrosion inhibitor is sodium phosphate.
3. The methanol to olefin process caustic tower grease inhibitor according to claim 2, wherein the amine compound is at least one of diethylenetriamine and N, N-diethylhydroxylamine; the sulfate compound is sodium thiosulfate; the alcohol compound is propylene glycol; the surfactant is alkylphenol polyoxyethylene.
4. The yellow oil inhibitor for the caustic tower in the process of preparing olefin from methanol according to claim 1, which is characterized by comprising the following components in parts by mass: 10-30 parts of amine compounds, 2-10 parts of sulfate compounds, 5-15 parts of alcohol compounds, 2-10 parts of surfactants and 0.5-3 parts of corrosion inhibitors.
5. The methanol to olefin process caustic tower grease inhibitor according to claim 1, wherein the amine compound is a mixture of diethylenetriamine and N, N-diethylhydroxylamine.
6. The methanol-to-olefin process caustic tower grease inhibitor according to claim 5, wherein the mass part ratio of diethylenetriamine to N, N-diethylhydroxylamine is (0.5-10): 1.
7. the yellow oil inhibitor for the alkaline tower in the process of preparing olefin from methanol according to claim 1, wherein the amine compound, the sulfate compound, the alcohol compound, the surfactant and the corrosion inhibitor are uniformly dispersed in deionized water to form a stable solution system.
8. A method for inhibiting butter generation in a methanol-to-olefin process alkaline tower adopts any butter inhibitor in claims 1-7, and is characterized in that the butter inhibitor is added into the alkaline tower of the methanol-to-olefin process to inhibit butter generation, and the mass content of the butter inhibitor added into the alkaline tower of the methanol-to-olefin process is 20-200 ppm.
9. The method for inhibiting the formation of butter oil in a methanol to olefin process caustic tower of claim 8, wherein the butter inhibitor is continuously injected on a strong base, medium base and weak base circulating alkaline line of the caustic tower.
10. The method for inhibiting the formation of yellow oil in the caustic tower of the methanol to olefin process according to claim 8, wherein the mass content of aldehyde ketone in the product gas at the inlet of the caustic tower of the methanol to olefin separation unit is less than 300 ppm.
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Citations (5)

* Cited by examiner, † Cited by third party
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