Production process of compound metal deactivator
A technology of metal passivation agent and production process, applied in the direction of metal material coating process, etc., can solve the problems of deterioration, low passivation efficiency of metal passivator, increase of hydrogen and coke yield, etc.
Pending Publication Date: 2022-07-22
洛阳市华工实业有限公司
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Problems solved by technology
The heavy metals in crude oil (such as nickel, vanadium, iron, sodium, etc.) are almost all concentrated in the residue fraction, and as the residue is brought into the catalytic device, they are continuously deposited on the catalyst during the reaction process, causing catalyst poisoning and deactivation And make selectivity worse, make the productive rate of hydrogen and coke increase, gasoline and light oil yield decrease, can threaten the safe, smooth operation of catalytic device when serious; The passivation efficiency of existing metal passivation agent is low , how to improve the conversion efficiency of the metal passivator and prolong the life of the catalyst has become a difficult technical problem for a long time
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[0017] Below in conjunction with embodiment and specific embodiment, the present invention is described in further detail:
[0018] The process for preparing metal passivator one is as follows: distilled water: 46%-52%, phosphoric acid: 2.1%-3.5%, sodium hydroxide: 0.3%-0.8%, antimony trioxide: 15%-28%, Hydrogen peroxide: 16.5%-31%, monoethanolamine: 5-8%, the sum of the above components is 100%;
[0019] Add distilled water into the reaction kettle, start steam heating and start stirring, and add phosphoric acid and sodium hydroxide under stirring; after adding the above materials, add antimony trioxide while heating up. After all the antimony is added, close the feeding port and turn on the reflux switch; when the temperature in the reaction kettle rises to 90-95 °C, start to drip hydrogen peroxide, control the dripping speed, and the dripping speed is not more than 200Kg / h, pay attention to observe the reaction kettle There should be no pressure inside; the height of the f...
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The invention relates to a production process of a compound metal deactivator, which comprises the following steps of: 1, preparing a metal deactivator I; 2, preparing a metal deactivator II; and 3, mixing the metal deactivator I and the metal deactivator II according to the content of heavy metals in crude oil. Pollution of heavy metal ions such as nickel, vanadium, iron, sodium and the like in feed to the cracking catalyst, namely influence on activity and selectivity of the catalyst, can be inhibited, hydrogen generation is reduced, coke generation is reduced, the gasoline yield is increased, the processing capacity of the device and the proportion of residual oil doped in raw oil are increased, the conversion rate is increased, and the production cost is reduced. The service life of the catalyst is prolonged.
Description
technical field [0001] The invention relates to the technical field of crude oil catalytic cracking, in particular to a production process of a compound metal passivator. Background technique [0002] Catalytic cracking of heavy oil is one of the main process technologies for lightening heavy oil. With the continuous advancement of catalytic cracking technology, the feedstock for catalytic cracking is also becoming heavier, and has developed from wax oil to blended residual oil or full residual oil feed. Heavy metals (such as nickel, vanadium, iron, sodium, etc.) in crude oil are almost all concentrated in the residual oil fraction. As the residual oil is brought into the catalytic device, they are continuously deposited on the catalyst during the reaction process, causing catalyst poisoning and deactivation. And the selectivity is deteriorated, the yield of hydrogen and coke is increased, the yield of gasoline and light oil is decreased, and in severe cases, it will threat...
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IPC IPC(8): C23C22/08C23C22/58
CPCC23C22/08C23C22/58
Inventor 郑晓伟李群星贾新强
Owner 洛阳市华工实业有限公司