Catalyst composite for dehydrogenation of hydrocarbons and its preparation method

A technology for dehydrogenation catalysts and composites, which can be used in catalyst activation/preparation, hydrocarbons, hydrocarbons, etc., and can solve problems such as undocumented alkali metal combined uses

A technology for dehydrogenation catalysts and composites, which can be used in catalyst activation/preparation, hydrocarbons, hydrocarbons, etc., and can solve problems such as undocumented alkali metal combined uses

CN104105546BInactive Publication Date: 2016-10-19RELIANCE INDUSTRIES LIMITED
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  • Catalyst composite for dehydrogenation of hydrocarbons and its preparation method
  • Catalyst composite for dehydrogenation of hydrocarbons and its preparation method
  • Catalyst composite for dehydrogenation of hydrocarbons and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0122] Preparation of Catalyst Support

[0123]Inert alpha alumina nuclei with an average diameter of 1.2 mm were used as cores. The particles were grown by coating activated alumina powder and binder in a rotating pan to an average diameter of 1.8 mm. The material is then hydrated to gain strength and dried. This is followed by heating at 850°C in the presence of air. Activated alumina, once heated to 850°C, produces a mixture of delta and theta alumina phases (Reference: Industrial Alumina Chemicals, C. Mishra, ACS Monograph, 1986).

Embodiment 2

[0125] Preparation of Catalyst Compounds for Catalysts

[0126] Using a two-step process to impregnate the spherical coated alumina support prepared in Example 1, by employing the incipient wetness technique, catalyst composites were prepared with the following mixture:

[0127] Table 1:

[0128]

[0129] In the first impregnation step, use LiNO 3 solution, impregnating the carrier by wet impregnation, after which the impregnated carrier was dried and calcined at 640°C / 4h. The second impregnation is performed with a salt solution of Pt, Sn, Ir and Na. The precursor used is H 2 PtCl 6 , SnCl 2 , IrCl 3 , NaCl, HCl and TMA. The re-impregnated support was dried again, calcined, and then subjected to a controlled dehalogenation step to reduce its chlorine content to 0.20% by weight.

[0130] Measurement data:

[0131] 1. The influence of the presence of iridium on the bromine value

[0132] The bromine numbers of the catalysts prepared according to Examples 1 and 2 ...

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Abstract

The present invention provides dehydrogenation catalyst composites capable of providing dehydrogenated hydrocarbon products characterized by a Bromine Number of at least 19 for the hydrocarbons. The catalyst composites of the present invention comprise nanoscale composites containing a Group VIII component, a Group IVA component and a sulfur-containing capping agent, an alkali metal component, a halogen component and having an alpha alumina core and comprising a mixture of gamma and delta alumina outer carrier.

Description

technical field [0001] The present invention relates to catalysts for use in processes for the production of linear alkylbenzenes. More specifically, the present invention relates to novel catalyst composites and methods for their preparation. The present invention also relates to a process for the preparation of unsaturated hydrocarbons, ie monoolefins, from saturated hydrocarbons, ie paraffins, by dehydrogenation. Background technique [0002] The dehydrogenation of saturated hydrocarbons or paraffins, especially C2-C20 paraffins, is an important petrochemical process, from which many useful unsaturated hydrocarbons can be produced. These unsaturated hydrocarbons are ethylenic monomers such as ethylene, propylene, butene, butadiene, styrene, and straight-chain monoolefins with C6-C20 carbon atoms, which are widely used in various plastics, synthetic rubber, and detergents, etc. in production. Additionally, the dehydrogenation of naphthenes and paraffins is the most impo...

Claims

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Application Information

Patent Timeline
19 Oct 2016
Publication
CN104105546B
IPC
B01J37/02; B01J37/18; B01J21/04; B01J23/58; B01J23/62; B01J35/00; B01J35/02; B01J35/08; B01J35/10; C07C5/333
CPC
B01J37/16; B01J37/0205; B01J21/04; B01J23/42; B01J23/468; B01J23/626; B01J35/0013; B01J35/002
Inventors
沙拉德·瓦苏德罗·兰德; 维拉·V·S·B·S·R·M·卡特拉沃拉帕里