Method for inhibiting generation of grease

A butter and butter inhibitor technology, applied in organic chemical methods, chemical instruments and methods, and hydrocarbon purification/separation, etc., can solve the problems of cumbersome operation, instability, and poor pertinence.

Active Publication Date: 2017-03-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that in the existing method for inhibiting the production of butter, the pertinence to the alkali washing tower of the methanol-to-olefins plant is not strong, the inhibitor is not effective and unstable, the operation is cumbersome, and the cost is high.

Method used

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  • Method for inhibiting generation of grease
  • Method for inhibiting generation of grease

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Dissolve 40 g of isopropyl hydroxylamine and 25 g of isopropanol in 260 g of deionized water, stir evenly, and filter. The filtrate is the butter inhibitor, called HYI-1.

[0020] The above-mentioned HYI-1 inhibitor is applied to the simulated caustic scrubber of a methanol-to-olefin plant. The feed composition of the caustic scrubber is 41.1% ethylene, 40.2% propylene, and C 4 11.2%, acetaldehyde 0.05%, butanone 0.03%, C 5 + Hydrocarbon 5.58%, CO 2 0.02%, temperature 45°C, sodium hydroxide concentration 10%. Using a piston pump, the inhibitor was continuously added to the circulating alkaline solution and then into the caustic washing tower, and the addition amount was 40 ppm (relative to the feed of the caustic washing tower). After 30 days of continuous operation of the device, no tower blockage was seen, and the weight of butter in the lye was calculated. And compared with the amount of butter produced when no butter inhibitor was added, the inhibition rate was calcula...

Embodiment 2

[0024] The butter inhibitor HYI-1 was prepared according to the method of Example 1, and the added amount of the butter inhibitor was changed to 100 ppm. The same method was used to evaluate its inhibitory effect on butter production according to the method of Example 1. See Table 1 for details.

Embodiment 3

[0026] The butter inhibitor HYI-1 was prepared according to the method in Example 1, and the added amount of the butter inhibitor was changed to 200 ppm. Similarly, the method of Example 1 was used to evaluate its inhibitory effect on the formation of butter. See Table 1 for details.

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Abstract

The invention relates to a method for inhibiting generation of grease, which solves the technical problems of poor grease inhibition effect, tower blockage due to instability, tedious operation and high cost in the previous caustic wash towers. The method solves the problems by employing a following technical scheme: 1) a grease inhibitor (I) is employed by comprising the following components in parts by weight: 0.5-10 parts of aminated compounds and 0-5 parts of alcohols compounds; and b) the inhibitor (I) and alkali lye (II) are subjected to on-line continuous injection through an alkali lye injection line of the caustic wash tower into the caustic wash tower (1). The method can be used for inhibiting massive generation of grease in the industrial apparatus caustic wash tower such as petroleum ethylene, ethylene produced by ethanol, alkene produced by methanol, vinyl acetate, dichloroethylene and epoxypropane, as well as tower blockage.

Description

Technical field [0001] The invention relates to a method for inhibiting the formation of butter. Background technique [0002] Among the low-carbon olefins, ethylene and propylene are important organic chemical raw materials, and the demand is increasing year by year. The traditional route to obtain ethylene and propylene is naphtha cracking. This route relies on petroleum. In the short term, petroleum has the problems of rising prices and unstable supply, and long-term resource storage is limited. Therefore, in recent years, as the most promising process to replace naphtha to olefins, coal or natural gas has received great attention through methanol to ethylene, propylene and other low-carbon olefin technologies (methanol to olefins, MTO or MTP). Whether in the traditional naphtha cracking route or in the emerging methanol-to-olefin technology, in order to obtain the target product meeting the purity requirements or to recycle some unreacted materials, the materials flowing out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07B63/04C07C7/20C07C11/04C07C11/06
Inventor 姜丽燕田文卿李继文王川
Owner CHINA PETROLEUM & CHEM CORP
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