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Preparation process of bimetallic passivator

A preparation process and passivator technology, applied in catalyst protection, physical/chemical process catalysts, cracking, etc., can solve problems such as hazards and safety issues of metal passivators, and achieve risk reduction, high antimony hanging rate, use of flexible effects

Inactive Publication Date: 2020-02-28
宿迁明江化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the chemical properties of hydrogen peroxide, there are safety problems in the process of preparing metal passivators, and workers exposed to hydrogen peroxide will also cause harm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Preparation of single antimony passivator:

[0025] 1. Pump 2000kg of lactic acid (oxalic acid, citric acid, tartaric acid, malic acid) into the kettle.

[0026] 2. 1000kg of ethanolamine (triethanolamine, triethylamine, diethanolamine) is pumped into the head tank, and added dropwise while cooling and stirring.

[0027] 3. After the dropwise addition, stir for 5 minutes, open the manhole cover and put 1000kg of antimony trioxide into the kettle.

[0028] 4. After casting, raise the temperature to 110°C. During the heating process, keep the reactor closed, open the condenser valve and the cooling water valve, condense and reflux, and keep warm for 2.5 hours. Sampling and observation shows that the reaction liquid is reddish-brown and transparent. The reaction is completed, and the temperature is lowered to Below 50°C.

[0029] 5. Pump 500kg of deionized water into the kettle to obtain the finished product of monoantimony passivator.

[0030] Preparation of single cer...

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PUM

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Abstract

The invention discloses a preparation process of a bimetallic passivator, and belongs to the technical field of petrochemical engineering. The preparation process comprises the following three steps in sequence: preparation of a single antimony passivator, preparation of a single cerium passivator and preparation of a composite passivator, wherein an organic acid and an organic amine are reacted at a certain ratio to further form a chelate with antimony trioxide and cerium carbonate, and a water-soluble passivator product is formed. Compared with a traditional passivator process, hydrogen peroxide is not used as a raw material, so that the risk in the production process is reduced, and harm caused by contact of workers with hydrogen peroxide is avoided. Compared with the prior art, the process has the advantages that the antimony trioxide structure is reserved, antimony pentoxide is formed without hydrogen peroxide oxidation, compared with antimony pentoxide, the content of antimony inantimony trioxide molecules is higher, and when unit mass of antimony oxide is deposited on a catalyst, the content of antimony on the surface of the catalyst is higher, and the antimony hanging rateis higher.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a preparation process of a double metal passivator. Background technique [0002] With the continuous development of catalytic cracking (FCC) technology and driven by the benefit factors of residual oil processing, the blending rate of residual oil in catalytic cracking (FCC) units has been continuously increased, and some units have achieved full residual oil feed. The heavy and inferior quality of raw materials has also brought many problems that affect the economic operation of the device, among which metal pollution, especially heavy metal pollution, is one of the more prominent problems. [0003] At present, the contaminating metals of FCC catalysts that have been found mainly include nickel, vanadium, iron, copper, sodium, calcium, magnesium, potassium and lead, etc., and the most common contaminating metals include nickel, vanadium, iron and sodi...

Claims

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Application Information

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IPC IPC(8): B01J33/00C10G11/02
CPCB01J33/00C10G11/02
Inventor 石肖
Owner 宿迁明江化工股份有限公司
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