Catalytic-cracking metal passivator

A metal deactivator and catalytic cracking technology, which is applied in catalytic cracking, catalyst protection, cracking, etc., can solve the problems of catalyst poison deactivation selectivity, increase of hydrogen and coke yield, and decrease of light oil yield. Low toxicity, low freezing point, and low viscosity
CN102974403AInactive Publication Date: 2013-03-20江苏汉光实业股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
江苏汉光实业股份有限公司
Publication Date
2013-03-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a catalytic-cracking metal passivator which is composed of the following components in parts by weight: 7-9 parts of organic acid, 22-27 parts of triethylamine, 140-160 parts of hydrogen peroxide, 135-160 parts of antimony trioxide, 30-40 parts of ammonium bicarbonate and 160-180 parts of water. According to a formula disclosed by the invention, the ammonium bicarbonate is used and is decomposed along with continuous temperature rise to generate gas, so that a reaction surface area is enlarged to make the antimony trioxide react fully and completely. The catalytic-cracking metal passivator disclosed by the invention is high in antimony content, and the pentavalent antimony passivator is low in viscosity, low in solidifying point, high in thermal decomposition temperature and good in stability, has an obvious effect on pollutant metallic nickel on a passivation catalyst in a catalytic cracking process, and has the antimony hanging rate far more than that of organic antimony and trivalent antimony passivators; and in addition, raw materials used according to the invention are low in toxicity and are free from harm to a human body, secondary pollution to the environment and adverse influences to products and subsequent processing of the products.
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Description

technical field

[0001] The invention relates to a catalytic cracking metal passivator. Background technique

[0002] In the process of catalytic cracking, especially in the process of catalytic cracking with heavy oil as raw material, heavy metals contained in raw oil, such as nickel, vanadium, copper, iron and other heavy metals, will deposit on the surface of the catalyst, causing catalyst poisoning, deactivation and selectivity. As a result, the yield of light oil decreased, and the yield of hydrogen and coke increased. For the metal pollution of catalytic cracking catalysts, in addition to demetallization pretreatment of raw materials and selection of catalysts with strong metal resistance, the industry can also improve the properties of catalysts by increasing the replacement rate of catalysts, and use passivators to inhibit The poisonous effect of the metal in the raw material on the catalyst. Among them, the use of passivating agent is the simplest and most effectiv...

Claims

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