CN111056897B - 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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CN111056897B
CN111056897B CN201811206984.3A CN201811206984A CN111056897B CN 111056897 B CN111056897 B CN 111056897B CN 201811206984 A CN201811206984 A CN 201811206984A CN 111056897 B CN111056897 B CN 111056897B
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butter
alkali
inhibitor
butter inhibitor
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CN111056897A (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 technical scheme that the butter inhibitor is added into the alkaline tower of the methanol-to-olefin process to inhibit the generation of butter is adopted, and the amount of the butter inhibitor added into the alkaline tower of the methanol-to-olefin process is 20-200 ppm, so that the problems are solved well, and the method can be used for inhibiting the butter in the alkaline tower of the methanol-to-olefin process.

Description

Yellow oil inhibitor for caustic wash tower in process of preparing olefin from methanol
Technical Field
The invention relates to a yellow oil inhibitor for an alkaline washing tower in a process for preparing olefin from methanol.
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 olefins 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 gas 2 S、CO 2 And 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 the alkali liquor, a plurality of sections of alkali washing are adopted, for example, two-section or three-section alkali washing is mostly adopted by 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 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 alkali 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. The oxygen-containing compounds have strong activity at high temperature and are very easy to react and polymerize, i.e. the oxygen-containing compounds such as aldehyde and ketone with active hydrogen atoms on the alpha carbon atoms of two molecules react under the action of NaOH to generate beta-hydroxyl products, and then the products are further added to polymers with certain molecular weight.
The production of the alkaline washing tower butter is generally reduced by optimizing the process conditions and adding measures such as butter inhibitor. CN101348410A proposes a three-component mixture of alcamines, hydrazides and alkylamines to prepare a butter inhibitor, which can inhibit the generation of butter in the caustic washing tower of an ethylene plant to some extent. CN106467444A proposes a butter inhibitor prepared from amine compounds and alcohol compounds, which inhibits the aldehyde-ketone condensation and olefin cross-linking polymerization in the system to a certain extent.
The MTO reaction process is different from the traditional ethylene steam cracking process in nature, 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 manner.
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 to 40 parts of amine compound, 1 to 20 parts of sulfate compound, 1 to 20 parts of alcohol compound, 1 to 20 parts of surfactant and 0.1 to 5 parts of corrosion inhibitor.
Wherein the amine compound is one or a mixture of more of diethylenetriamine, triethylene tetramine and N, N-diethyl hydroxylamine; 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 to 30 portions of amine compound, 2 to 10 portions of sulfate compound, 5 to 15 portions of alcohol compound, 2 to 10 portions of surfactant and 0.5 to 3 portions of corrosion inhibitor.
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 part 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 used cooperatively to inhibit butter in an alkaline washing tower of a methanol-to-olefin device, so that an unexpected synergistic effect is achieved.
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 technical scheme, preferably, the mass content of the aldehyde ketone in the product gas at the inlet of the alkaline tower of the methanol-to-olefin separation unit is less than 300ppm.
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, entrained oxygen-containing compounds are removed, and then the product gas enters an alkaline washing tower, 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 play a synergistic role, the grease inhibitor has a remarkable inhibiting effect on the polymerization of oxides and the free radical polymerization in a targeted manner, the grease inhibitor has a good dispersing and solubilizing effect on the generated grease, the problem that much grease is contained in the alkaline tower of the MTO process is effectively solved, the mass content of polymers in the alkaline liquid can be reduced to 0.14%, the pressure difference of the alkaline tower can reach 23kPa, and a 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 51kPa.
[ 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, and the butter inhibitor 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 0.29 percent, and the pressure difference of the alkali washing tower is increased to 28kPa.
[ 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, 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, the sample is taken for analysis, and the polymer content in the alkali liquor is calculated. The polymer content in the alkali liquor reaches 0.46 percent, and the pressure difference of the alkali washing tower is increased to 32kPa.
[ 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, 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 30kPa.
[ 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, the butter inhibitor component is sequentially added into 47 parts of deionized water in a stirring kettle, and the mixture is 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, 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 24kPa.
[ example 5 ] A method for producing a polycarbonate
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, 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 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, 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 28kPa.
[ 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 28kPa.
[ 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, and the butter inhibitor 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 a 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 29kPa.
[ 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 29kPa.
[ example 9 ]
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, 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 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 a 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 29kPa.
[ example 10 ] A method for producing a polycarbonate
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 a 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 28kPa.
[ example 11 ] A method for producing a polycarbonate
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, the butter inhibitor component is sequentially added into 47 parts of deionized water in a stirring kettle, and the mixture is 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 38kPa.
[ example 12 ] A method for producing a polycarbonate
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 32kPa.
[ example 13 ]
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, 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: 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, the butter inhibitor component is sequentially added into 47 parts of deionized water in a stirring kettle, and the mixture is 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 23kPa.
[ example 14 ] A method for producing a polycarbonate
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, 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: 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%, and the pressure difference of the alkali washing tower is increased to 23kPa.
[ example 15 ]
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, 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, 1 part of sodium thiosulfate, 12 parts of 1, 2-propylene glycol, 8 parts of alkylphenol ethoxylates and 1 part of sodium phosphate, the butter inhibitor component is sequentially added into 47 parts of deionized water in a stirring kettle, and the mixture is 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 a 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 35kPa.
[ example 16 ] A method for producing a polycarbonate
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, 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, 2 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 a 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 32kPa.
[ 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 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 0.16%, and the pressure difference of the alkali washing tower is increased to 24kPa.
[ 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 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 0.15%, and the pressure difference of the alkali washing tower is increased to 24kPa.
[ example 19 ]
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, 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, 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 0.27%, and the pressure difference of the alkali washing tower is increased to 28kPa.
[ 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 a 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 26kPa.
[ 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 a 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 23kPa.
[ 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 a 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 23kPa.
[ 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 polyoxyethylene and 1 part of sodium phosphate, the components of the grease inhibitor are sequentially added into 47 parts of deionized water in a stirring kettle, and the mixture is stirred for 2 hours at the temperature of 20 ℃ to obtain a grease inhibitor product. The mass content of the butter inhibitor product is 120ppm, the device is operated for 168 hours, and a 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 29kPa.
[ example 24 ] A method for producing a polycarbonate
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 a 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 27kPa.
[ 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, the components of the grease inhibitor are sequentially added into 47 parts of deionized water in a stirring kettle, and the mixture is stirred for 2 hours at the temperature of 20 ℃ to obtain a grease 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 23kPa.
[ 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, the butter inhibitor component is sequentially added into 47 parts of deionized water in a stirring kettle, and the mixture is 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 23kPa.
[ 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 25kPa.
[ example 28 ] to
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, the butter inhibitor component is sequentially added into 47 parts of deionized water in a stirring kettle, and the mixture is 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 25kPa.
[ 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 24kPa.
[ example 30 ] to provide
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, 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 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 24kPa.
[ 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, the butter inhibitor component is sequentially added into 47 parts of deionized water in a stirring kettle, and the mixture is 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 26kPa.
[ 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 27kPa.
[ 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, the butter inhibitor component is sequentially added into 47 parts of deionized water in a stirring kettle, and the mixture is 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 28kPa.
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, and a 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 39kPa.
[ 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 butter inhibitor product is 200ppm, the device is operated for 168 hours, and a 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 23kPa.
[ example 36 ]
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 100ppm, 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 500 hours, and the polymer content in the alkali liquor is calculated after sampling and analyzing. The polymer content in the alkali liquor reaches 0.19%, and the pressure difference of the alkali washing tower is increased to 27kPa.
[ 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 23kPa.
[ example 38 ]
The mass content of acetaldehyde in product gas at an inlet of an alkaline washing tower of an MTO alkaline washing system is 300ppm, 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 0.48 percent, and the pressure difference of the alkali washing tower is increased to 33kPa.
[ 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 23kPa.
[ 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 30kPa.
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 42kPa.
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 38kPa.
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 a 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 31kPa.
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, and 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 32kPa.
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 a 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 25kPa.
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 butter inhibitor for HK-1312 type ethylene is injected into circulating strong alkali, medium alkali and weak alkaline liquids of the alkaline washing tower, the mass content of the butter inhibitor is 120ppm, the device is operated for 168 hours, a sample is taken 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 52kPa.
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 (9)

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 compound, 1-20 parts of sulfate compound, 1-20 parts of alcohol compound, 1-20 parts of surfactant and 0.1-5 parts of corrosion inhibitor;
the amine compound is a mixture of diethylenetriamine and N, N-diethylhydroxylamine; the alcohol compounds are ethylene glycol, propylene glycol and butanediol; the surfactant is alkylphenol ethoxylates; the corrosion inhibitor is sodium phosphate.
2. The inhibitor for yellow oil in alkaline tower in process of preparing olefin from methanol as claimed in claim 1, wherein the sulfate compound is sodium sulfite, sodium bisulfite or sodium thiosulfate.
3. The methanol to olefin process caustic tower grease inhibitor as claimed in claim 2, wherein said sulfate based compound is sodium thiosulfate; the alcohol compound is propylene glycol.
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 compound, 2-10 parts of sulfate compound, 5-15 parts of alcohol compound, 2-10 parts of surfactant and 0.5-3 parts of corrosion inhibitor.
5. The methanol-to-olefin process caustic tower grease inhibitor according to claim 4, wherein the mass part ratio of diethylenetriamine to N, N-diethylhydroxylamine is (0.5 to 10): 1.
6. 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.
7. A method for inhibiting butter generation in a methanol-to-olefin process alkaline tower adopts any butter inhibitor in claims 1-6, 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.
8. The method for inhibiting the formation of butter oil in a caustic tower of a methanol to olefin process according to claim 7, wherein the butter inhibitor is continuously injected on a strong base, medium base and weak base circulating alkali line of the caustic tower.
9. The method for inhibiting the formation of yellow oil in the caustic tower of the methanol to olefin process according to claim 7, 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 300ppm.
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CN101838553A (en) * 2010-04-07 2010-09-22 浙江杭化科技有限公司 Butter inhibitor for ethylene unit alkaline washing tower
CN105884566A (en) * 2014-12-01 2016-08-24 中石化洛阳工程有限公司 Butter inhibitor for MTO (methanol to olefins) device alkaline washing towers and preparation method thereof
CN104876783A (en) * 2015-04-08 2015-09-02 宜兴市中大凯化工有限公司 Grease inhibiter for alkaline tower of ethylene unit
CN106467446B (en) * 2015-08-20 2019-06-11 中国石油化工股份有限公司 Butter inhibitor
KR102515201B1 (en) * 2016-03-18 2023-03-29 비엘 테크놀러지스 인크. Methods and compositions for preventing fouling in a caustic column

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