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Composite silicon-free defoamer

A defoamer and composite technology, which is applied in petrochemical products and composite silicon-free defoamers, can solve the problems of shortening the running time of the device and catalyst deactivation

Active Publication Date: 2011-11-16
CANGZHOU XINCHANG CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, silicon will be deposited on the refined catalyst, resulting in catalyst deactivation and shortening the operating time of the unit

Method used

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  • Composite silicon-free defoamer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: Weigh raw materials according to the following ratio: 20Kg of lauryl alcohol, 35Kg of polyoxyethylene polyoxypropylene glyceryl ether, 15Kg of ethoxypropoxylate of phenol derivatives, 30Kg of isooctyl alcohol, the polyoxyethylene polyoxypropylene The relative molecular weight of oxypropylene glyceryl ether is greater than 15,000. Add the above-mentioned raw materials into a reaction vessel with a heating device, heat and stir at 70° C. for 3 hours, and stir evenly to form the composite silicon-free defoamer.

Embodiment 2

[0018] Example 2: Weigh raw materials according to the following proportions: 30Kg of lauryl alcohol, 30Kg of polyoxyethylene polyoxypropylene glyceryl ether, 15Kg of ethoxypropoxylate of phenol derivatives, and 25Kg of isooctyl alcohol. The relative molecular weight of the polyoxyethylene polyoxypropylene glyceryl ether is greater than 15,000. Add the above-mentioned raw materials into a reaction vessel with a heating device, heat and stir at 70° C. for 3 hours, and stir evenly to form the composite silicon-free defoamer.

Embodiment 3

[0019] Example 3: raw materials were weighed according to the following proportions: 35Kg of lauryl alcohol, 45Kg of polyoxyethylene polyoxypropylene glyceryl ether, 5Kg of phenol derivative ethoxypropoxylate, and 15Kg of isooctyl alcohol. The relative molecular weight of the polyoxyethylene polyoxypropylene glyceryl ether is greater than 15,000. Add the above-mentioned raw materials into a reaction vessel with a heating device, heat and stir at 70° C. for 3 hours, and stir evenly to form the composite silicon-free defoamer.

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Abstract

The invention relates to a composite silicon-free defoamer for solving the problem of a foam layer in a coke tower. The technical scheme of the composite silicon-free defoamer is that the defoamer is prepared from the following materials in parts by weight: 20-50 parts of lauryl alcohol, 10-50 parts of polyoxyethylene polyoxypropylene glycerol ether, 5-20 parts of phenol derivative ethoxy propoxylate and 10-30 parts of isooctanol. The invention is free of silicon, nontoxic and harmless, excellent in heat resistance, and is not decomposed when heated to 500 DEG C and is suitable for defoaming at high temperature. The defoaming effect of silicon-free defoamer is equivalent to that of low-silicon defoamers, and better than high-silicon defoamers; and the defoamed ratio can reach 90% or more when the added quantity exceeds 50 gamma / g. The site trial shows that the product has excellent defoaming effect, and satisfies the requirements of safe operation of devices without any undesirable effects for the product quality and catalysts of a downstream unit through inspection.

Description

technical field [0001] The invention relates to a petrochemical product, in particular to a composite non-silicon defoamer used for digesting a foam layer in a coke tower of delayed coking, and belongs to the technical field of petrochemical industry. Background technique [0002] Delayed coking is a heavy oil processing technology. The heavy oil is heated and cracked and converted in the coke tower to obtain gas, gasoline, diesel oil, coker wax oil and coke. During the conversion of heavy oil products in the coke tower, a large amount of foam will be generated, forming a foam layer. As the coke bed rises, the foam layer will easily carry a large amount of coke powder into the bottom of the fractionation tower, resulting in the bottom of the fractionation tower and The furnace tube of the heating furnace is coked, which reduces the operating cycle of the device. Due to the existence of the foam layer, the coke generation period of the coke drum will be reduced, and the util...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/00B01D19/04C09K23/00
Inventor 李斐刘公召
Owner CANGZHOU XINCHANG CHEM CORP
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