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Methanol-to-olefin alkaline scrubber butter inhibitor composition and method for inhibiting butter formation

A composition and inhibitor technology, used in ethylene production, hydrocarbons, chemical instruments and methods, etc., can solve the problems of unsatisfactory butter dispersion effect and unstable inhibitory effect, and achieve reduced equipment corrosion, good dispersion, The effect of reducing the differential pressure

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

[0009] The purpose of the present invention is to overcome the unsatisfactory inhibitory effect of butter inhibitors in the prior art and the unsatisfactory defect of the butter dispersion effect that has been generated, to provide a methanol-to-olefins alkali-washing tower butter inhibitor composition and inhibitors The butter production method, the butter inhibitor can inhibit the production of butter in the alkali washing tower, has a good dispersion effect on the produced butter, reduces equipment corrosion, can also reduce the polymer mass content in the lye, and can reduce the alkali The pressure difference of the washing tower has achieved good technical results

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This example is intended to illustrate the inhibitor composition of the present invention and the method of inhibiting the production of butter.

[0038]The product gas flow rate b at the inlet of the alkaline washing tower of the MTO alkaline washing system is 80 t / h, and the mass content c of acetaldehyde in the product gas is 100 ppm. In the inhibitor, the formula in parts by mass is: 30 parts by weight of ethanolamine, 2 parts by weight of sodium sulfite, 5 parts by weight of sodium polyacrylate, and 80 parts by weight of deionized water. Deionized water, sodium sulfite, ethanolamine and sodium polyacrylate were sequentially added to the stirring tank, and the butter inhibitor was obtained after stirring at 25° C. for 2 hours.

[0039] According to the expression Q=A(b×c) of the injection amount Q of the butter inhibitor composition, adjust the value of A so that the injection amount of the butter inhibitor is 80kg / h, the device is operated for 150h, the samples are...

Embodiment 2

[0042] This example is intended to illustrate the inhibitor composition of the present invention and the method of inhibiting the production of butter.

[0043] The product gas flow rate b at the inlet of the alkaline washing tower of the MTO alkaline washing system is 80 t / h, and the mass content c of acetaldehyde in the product gas is 100 ppm. In the inhibitor, the formula in parts by mass is: 10 parts by weight of ethanolamine, 10 parts by weight of diethanolamine, 10 parts by weight of triethanolamine, 3 parts by weight of sodium sulfite, 7 parts by weight of sodium dodecylbenzenesulfonate, 60 parts by weight of deionized water share. Deionized water, sodium sulfite, ethanolamine, diethanolamine, triethanolamine and sodium dodecylbenzenesulfonate were added to the stirring tank in sequence, and after stirring at 25° C. for 2 hours, the butter inhibitor was obtained with a pH value of 11.

[0044] According to the expression Q=A(b×c) of the injection amount Q of the butter...

Embodiment 3

[0047] This example is intended to illustrate the inhibitor composition of the present invention and the method of inhibiting the production of butter.

[0048] The product gas flow rate b at the inlet of the alkaline washing tower of the MTO alkaline washing system is 80 t / h, and the mass content c of acetaldehyde in the product gas is 100 ppm. In the inhibitor, the formula in parts by mass is: 20 parts by weight of ethanolamine, 6 parts by weight of diethanolamine, 4 parts by weight of triethanolamine, 1 part by weight of sodium sulfite, 19 parts by weight of sodium dodecylbenzenesulfonate, 50 parts by weight of deionized water share. Add deionized water, sodium sulfite, ethanolamine, diethanolamine, triethanolamine and sodium dodecylbenzenesulfonate to the stirring tank in sequence, and after stirring at 25° C. for 2 hours, the butter inhibitor was obtained, with a pH value of 12.8.

[0049] According to the expression Q=A(b×c) of the injection amount Q of the butter inhib...

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PUM

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Abstract

The invention relates to the technical field of petrochemical industry, and discloses a methanol-to-olefin alkali-washing tower butter inhibitor composition and a method for inhibiting the production of butter. Wherein, the inhibitor composition comprises an alcoholamine compound, a sulfite, a surfactant and a solvent, wherein the alcoholamine compound is selected from one or more of ethanolamine, diethanolamine and triethanolamine, so The sulfite is sodium sulfite. The use of the butter inhibitor can inhibit the production of butter in the alkaline washing tower, has a good dispersion effect on the formed butter, reduces equipment corrosion, can also reduce the mass content of polymers in the alkaline solution, and can reduce the pressure of the alkaline washing tower. Poor, and achieved better technical results.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a methanol-to-olefin alkali-washing tower butter inhibitor composition and a method for inhibiting the generation of butter. Background technique [0002] 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 generates low-carbon olefins such as ethylene and propylene under the action of a catalyst. 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 washing process is mostly used at home and abroad to remove H in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C7/00C07C7/20C07C11/04C07C11/06
CPCC07C7/00C07C7/20C07C11/04C07C11/06Y02P30/40
Inventor 王洪涛齐国祯李晓红王莉
Owner CHINA PETROLEUM & CHEM CORP
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