Pressure difference stabilizer composition of methanol to olefin alkali washing tower and method for reducing pressure difference of alkali washing tower

A stabilizer and composition technology, applied in the directions of hydrocarbons, carbon compound catalysts, chemical instruments and methods, etc., can solve the problem that the inhibitory effect of butter is unstable, the pressure difference of alkali washing tower is difficult to stabilize, and the mass content of polymer is reduced. and other problems, to achieve the effect of solving the pressure difference increase, reducing equipment corrosion, and reducing the polymer quality content

Active Publication Date: 2022-07-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the existing problems in the prior art that the pressure difference of the alkali washing tower is difficult to stabilize, the inhibitory effect of the butter inhibitor is unstable, and the dispersion effect of the produced butter is not ideal, and to provide a methanol-to-olefin alkali washing A tower pressure difference stabilizer composition and a method for reducing the pressure difference of an alkali-washing tower, the use of the pressure-drop stabilizer can reduce the pressure difference of the alkali-washing tower, and can inhibit the production of butter in the alkali-washing tower, which has a positive effect on the produced butter Good dispersing effect, reducing equipment corrosion, and can also reduce the polymer mass content in the lye, and achieved good technical results

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This example is intended to illustrate the differential pressure stabilizer composition of the present invention and the method for stabilizing the differential pressure.

[0033] The mass content of acetaldehyde in the inlet product gas of the alkaline washing tower of the MTO alkaline washing system is 100 ppm, and a pressure difference stabilizer is injected into the circulating strong alkali, medium alkali and weak alkali liquid of the alkaline washing tower. The formula is as follows: 50 parts by weight of isopropylamine, 0.1 part by weight of sodium thiosulfate, 0.2 part by weight of fatty alcohol polyoxyethylene ether, and 10 parts by weight of deionized water. Deionized water, isopropylamine, sodium thiosulfate and aliphatic alcohol polyoxyethylene ether were successively added to the stirring tank, and the pressure difference stabilizer was obtained after stirring at 25° C. for 2 hours.

[0034]The filling amount of the pressure difference stabilizer accounts f...

Embodiment 2

[0037] This example is intended to illustrate the differential pressure stabilizer composition of the present invention and the method for stabilizing the differential pressure.

[0038] The mass content of acetaldehyde in the inlet product gas of the alkaline washing tower of the MTO alkaline washing system is 100 ppm, and a pressure difference stabilizer is injected into the circulating strong alkali, medium alkali and weak alkali liquid of the alkaline washing tower. The formula is as follows: 10 parts by weight of isopropylamine, 10 parts by weight of diisopropylamine, 2 parts by weight of sodium thiosulfate, 8 parts by weight of fatty alcohol polyoxyethylene ether, and 70 parts by weight of deionized water. Add deionized water, isopropylamine, diisopropylamine, sodium thiosulfate and aliphatic alcohol polyoxyethylene ether to the stirring tank in sequence, and after stirring at 25°C for 2 hours, a differential pressure stabilizer with a pH value of 12 is obtained.

[0039...

Embodiment 3

[0042] This example is intended to illustrate the differential pressure stabilizer composition of the present invention and the method for stabilizing the differential pressure.

[0043] The mass content of acetaldehyde in the inlet product gas of the alkaline washing tower of the MTO alkaline washing system is 100 ppm, and a pressure difference stabilizer is injected into the circulating strong alkali, medium alkali and weak alkali liquid of the alkaline washing tower. The formula is as follows: 18 parts by weight of isopropylamine, 2 parts by weight of diisopropylamine, 6 parts by weight of sodium thiosulfate, 1 part by weight of fatty alcohol polyoxyethylene ether, and 73 parts by weight of deionized water. Add deionized water, isopropylamine, diisopropylamine, sodium thiosulfate and aliphatic alcohol polyoxyethylene ether to the stirred tank in sequence, and after stirring at 25° C. for 2 hours, a differential pressure stabilizer with a pH value of 13.5 is obtained.

[004...

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Abstract

The invention relates to the field of petrochemical industry, and discloses a pressure difference stabilizer composition of an alkali washing tower for methanol to olefins and a method for reducing the pressure difference of the alkali washing tower. The pressure difference stabilizer composition comprises aliphatic amine compounds, thiosulfate, surfactant and solvent, wherein the aliphatic amine compound is selected from isopropylamine and / or diisopropylamine, and the thiosulfate is selected from isopropylamine and / or diisopropylamine. For sodium thiosulfate. The pressure difference stabilizer can reduce the pressure difference of the alkaline washing tower, and can inhibit the production of butter in the alkaline washing tower. The quality content has achieved good technical results.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a pressure difference stabilizer composition of an alkali washing tower for methanol to olefins and a method for reducing the pressure difference of the alkali washing tower. Background technique [0002] Methanol to olefins (Methanol-To-Olefin, MTO for short) refers to the production of methanol from natural gas or coal as raw material through synthesis gas, and then methanol is used as a catalyst to generate low-carbon olefins such as ethylene and propylene. Its products have been proved to be fully applicable. In the production of polyolefins and other products. MTO technology has opened up a new process route for producing chemical products from unconventional petroleum resources, and has become the research focus of olefin synthesis from unconventional petroleum resources. [0003] In the olefin recovery system of the MTO process technology, the alkaline wash...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/20C07C11/04C07C11/06C07C7/20
CPCC07C1/20C07C7/20C07C2529/85C07C11/04C07C11/06Y02P30/40
Inventor 王洪涛齐国祯王莉郑毅骏
Owner CHINA PETROLEUM & CHEM CORP
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