Grease inhibitor composition for methanol-to-olefin alkaline washing tower and method for inhibiting generation of grease

Abstract

The invention relates to the technical field of petrochemical engineering, and discloses a grease inhibitor composition for a methanol-to-olefin alkaline washing tower and a method for inhibiting generation of grease. The inhibitor composition comprises an alcohol amine compound, sulfite, a surfactant and a solvent, the alcohol amine compound is selected from one or more of ethanolamine, diethanolamine and triethanolamine, and the sulfite is sodium sulfite. The grease inhibitor can inhibit the generation amount of grease in the alkaline washing tower, has a good dispersion effect on the generated grease, reduces equipment corrosion, can reduce the mass content of polymers in alkali liquor, can reduce the pressure difference of the alkaline washing tower, and achieves a good technical effect.

Description

Technical field

[0001] The present invention relates to the technical field of petrochemical industry, in particular to a methanol-to-olefin alkali scrubber butter inhibitor composition and a method for inhibiting butter formation.Background technique

[0002] Methanol-To-Olefin (Methanol-To-Olefin, abbreviated as MTO) refers to the production of methanol from natural gas or coal through synthesis gas, and then the methanol generates ethylene, propylene and other low-carbon olefins under the action of a catalyst. Its products have been proven to be fully applicable Used in the production of polyolefins and other products. The MTO technology has opened up a new process route for the production of chemical products from unconventional petroleum resources, and has become the focus of research on the synthesis of olefins from unconventional petroleum resources.

[0003] In the olefin recovery system of the MTO process technology, alkaline washing processes are mostly used at home and abroad to re...

Examples

Embodiment 1

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

[0038]The product gas flow rate b at the inlet of the caustic scrubber of the MTO caustic scrubber system is 80t / h, and the mass content c of acetaldehyde in the product gas is 100ppm. The butter inhibitor is injected into the caustic scrubber circulating strong alkali, medium alkali, and weak lye. Butter The formula of the inhibitor in terms of 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 stirred tank, and after stirring at 25°C for 2 hours, the butter inhibitor was obtained.

[0039]According to the expression Q=A(b×c) of the injection quantity Q of the butter inhibitor composition, adjust the value of A so that the filling...

Embodiment 2

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

[0043]The product gas flow rate b at the inlet of the caustic scrubber of the MTO caustic scrubber system is 80t / h, and the mass content c of acetaldehyde in the product gas is 100ppm. The butter inhibitor is injected into the caustic scrubber circulating strong alkali, medium alkali, and weak lye. Butter The formula in parts by mass of the inhibitor 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 dodecylbenzene sulfonate, and 60 parts by weight of deionized water Copies. Add deionized water, sodium sulfite, ethanolamine, diethanolamine, triethanolamine, and sodium dodecylbenzene sulfonate to the stirred tank in sequence, and stir at 25°C for 2 hours to obtain the yellow oil inhibitor with a pH of 11.

[0044]According to...

Embodiment 3

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

[0048]The product gas flow rate b at the inlet of the caustic scrubber of the MTO caustic scrubber system is 80t / h, and the mass content c of acetaldehyde in the product gas is 100ppm. The butter inhibitor is injected into the caustic scrubber circulating strong alkali, medium alkali, and weak lye. Butter The formula in parts by mass of the inhibitor 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 dodecylbenzene sulfonate, and 50 parts by weight of deionized water Copies. Add deionized water, sodium sulfite, ethanolamine, diethanolamine, triethanolamine, and sodium dodecylbenzene sulfonate to the stirred tank in sequence, and stir at 25°C for 2 hours to obtain the butter inhibitor with a pH of 12.8.

[0049]According to the...

Technical field

[0001] The present invention relates to the technical field of petrochemical industry, in particular to a methanol-to-olefin alkali scrubber butter inhibitor composition and a method for inhibiting butter formation.Background technique

[0002] Methanol-To-Olefin (Methanol-To-Olefin, abbreviated as MTO) refers to the production of methanol from natural gas or coal through synthesis gas, and then the methanol generates ethylene, propylene and other low-carbon olefins under the action of a catalyst. Its products have been proven to be fully applicable Used in the production of polyolefins and other products. The MTO technology has opened up a new process route for the production of chemical products from unconventional petroleum resources, and has become the focus of research on the synthesis of olefins from unconventional petroleum resources.

[0003] In the olefin recovery system of the MTO process technology, alkaline washing processes are mostly used at home and abroad to re...

Examples

Embodiment 1

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

[0038]The product gas flow rate b at the inlet of the caustic scrubber of the MTO caustic scrubber system is 80t / h, and the mass content c of acetaldehyde in the product gas is 100ppm. The butter inhibitor is injected into the caustic scrubber circulating strong alkali, medium alkali, and weak lye. Butter The formula of the inhibitor in terms of 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 stirred tank, and after stirring at 25°C for 2 hours, the butter inhibitor was obtained.

[0039]According to the expression Q=A(b×c) of the injection quantity Q of the butter inhibitor composition, adjust the value of A so that the filling...

Embodiment 2

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

[0043]The product gas flow rate b at the inlet of the caustic scrubber of the MTO caustic scrubber system is 80t / h, and the mass content c of acetaldehyde in the product gas is 100ppm. The butter inhibitor is injected into the caustic scrubber circulating strong alkali, medium alkali, and weak lye. Butter The formula in parts by mass of the inhibitor 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 dodecylbenzene sulfonate, and 60 parts by weight of deionized water Copies. Add deionized water, sodium sulfite, ethanolamine, diethanolamine, triethanolamine, and sodium dodecylbenzene sulfonate to the stirred tank in sequence, and stir at 25°C for 2 hours to obtain the yellow oil inhibitor with a pH of 11.

[0044]According to...

Embodiment 3

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

[0048]The product gas flow rate b at the inlet of the caustic scrubber of the MTO caustic scrubber system is 80t / h, and the mass content c of acetaldehyde in the product gas is 100ppm. The butter inhibitor is injected into the caustic scrubber circulating strong alkali, medium alkali, and weak lye. Butter The formula in parts by mass of the inhibitor 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 dodecylbenzene sulfonate, and 50 parts by weight of deionized water Copies. Add deionized water, sodium sulfite, ethanolamine, diethanolamine, triethanolamine, and sodium dodecylbenzene sulfonate to the stirred tank in sequence, and stir at 25°C for 2 hours to obtain the butter inhibitor with a pH of 12.8.

[0049]According to the...