Method of treating flammable catalyst

A catalyst and hydrotreating technology, applied in physical/chemical process catalysts, catalyst protection, molecular sieve catalysts, etc., can solve problems such as excessive sulfur removal damage, catalytic activity or stability decline, and equipment pollution

Inactive Publication Date: 2003-03-05
CRI INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Furthermore, some of the prior art methods for off-site treatment of presulfided supported metal oxide catalysts suffer from excessive sulfur removal as the hydrocarbon feed begins to run in the hydroprocessing reactor
This leads to a decrease in catalytic activity or stability, and may contaminate downstream equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment I

[0077] This example illustrates the case where the catalyst is presulfided and then treated with an oxygenated hydrocarbon.

[0078] A. Sulfur impregnation

[0079] A commercially available hydrotreating catalyst was used with the following properties.

[0080] Table 1: Catalyst Properties

[0081] Nickel 3.0wt%

[0082] Molybdenum 13.0wt%

[0083] Phosphorus 3.5wt%

[0084] Carrier γ-Al 2 o 3

[0085] Specific surface, m 2 / g 162

[0086] Pore ​​volume, cc / g 0.47

[0087] Size 1 / 16" trefoil

[0088] 250 g of the above sample was dried at 371°C for 1 hr and cooled to ambient temperature under vacuum. Place the sample in a flask and add enough sulfur powder at 85°C to bring the sulfur content to about 10 wt%. The flask was slowly purged with nitrogen and placed in a heating mantle. The sulfur was allowed to coat the catalyst, and the flask was further heated to 120 °C for 30 min. During this time the flask w...

Embodiment II

[0145] This example illustrates an embodiment in which a presulfided or sulfided catalyst is coated with an oxygenated hydrocarbon.

[0146] A commercially available sulfurized hydrotreating catalyst with the following properties was used.

[0147] Table 6: Catalyst performance

[0148] Nickel 3.0wt%

[0149] Molybdenum 13.0wt%

[0150] Phosphorus 3.5wt%

[0151] Sulfur 8wt%

[0152] Carrier γ-Al 2 o 3

[0153] Size 1 / 16" trefoil

[0154] The oxygenated hydrocarbons listed in Table 7 were added to the sulfided catalyst in the amounts listed. Hydrocarbons are added at ambient temperature and allowed to adsorb into the catalyst pores. The treated catalyst can be allowed to adsorb the oxygenated hydrocarbon for a period of time so that the catalyst is not sticky and free flowing. According to Example I, Part C, the automatic heating ramp test was determined.

[0155] Table 7: Post-coating Oxygenated Hydrocarbon Amou...

Embodiment III

[0157] The presulfided catalyst prepared by similar example I method is used for hydrotreating process. 7 catalysts were used, (1 comparison). These catalysts are:

[0158] 1) COMP Catalysts - The commercial hydrotreating catalysts listed in Table 1 have been sulfided with hydrogen and hydrogen sulfide by commercial sulfidation methods, as described below.

[0159] 2) Catalyst A - Prepared as described in Illustrative Embodiment I, containing 100% stoichiometric sulfur, and using lard listed in Table 2.

[0160]3) Catalyst B - prepared as described in Illustrative Embodiment I, containing 100% stoichiometric sulfur, and using the vegetable residue listed in Table 2.

[0161] 4) Catalyst C - Prepared as described in Illustrative Embodiment I, containing 100% stoichiometric sulfur, and using coconut oil listed in Table 2.

[0162] 5) Catalyst D - prepared as described in Illustrative Embodiment I, containing 100% stoichiometric sulfur, and using the methyl esters listed in Ta...

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Abstract

A method used for manufacturing a catalyst used for hydrogenation treating and / or hydrogenation cracking a hydrocarbon flow or exhaust treating a thionic gas flow comprises heating a prevulcanized composition to 200-500 DEG C in the presence of hydrogen gas to form a sulfide of a metal, wherein said prevulcanized composition contains a prevulcanized catalyst loaded at a porous carrier and at least part of the catalyst is coated and / or infused by at least a containing oxygen hydrocarbon having at least 16 carbon atoms and an iodine value of not less than 60, with a condition that when said hydrocarbon is glycerin trifatty acid ester, the catalyst is not coated and / or infused by said hydrocarbon when or before it is prevulcanized, and when there is no hydrogen added existing in the catalyst coated and / or infused, said catalyst has undergone a heating treatment at not lower than 175 DEG C, with reduced self-heating characteristics of said catalyst.

Description

[0001] The present invention is a divisional application of the parent case whose application date is April 21, 1994, application number is 94192462.9 (PCT / US94 / 04394), and the title of the invention is "a method for treating a spontaneously combustible catalyst". technical field [0002] This invention relates to a method of treating pyrophoric catalysts and catalyst compositions obtained by such treatment. In one aspect, the invention relates to a process for the preparation of a catalyst which produces a catalyst composition with reduced self-heating properties. In another aspect, the present invention relates to hydrotreating and / or hydrocracking processes. Background technique [0003] A pyrophoric catalyst is any catalyst composition which has a tendency to self-heat or burn in the presence of air or oxygen at or below 200°C. In particular, many hydrocarbon processing catalysts, such as hydrotreating, hydrocracking, and tail gas treatment catalysts, which typically co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/24B01J23/40B01J23/74B01J23/85B01J27/043B01J27/047B01J27/19B01J29/16B01J31/02B01J33/00B01J37/00B01J37/02B01J37/12B01J37/20C10G49/02C10G49/08
CPCC10G49/02B01J37/0203B01J37/12B01J37/20B01J33/00B01J23/85B01J31/0201
Inventor J·D·西曼斯J·A·帕廷E·R·萨蒙特J·R·洛克迈耶
Owner CRI INT
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