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Heterogeneous catalysts/process based on supported/grafted transition metal hydrides for ammonia formation from nitrogen and hydrogen

A transition metal, hydride technology, applied in the field of ammonia preparation, can solve problems such as difficult practical application

Inactive Publication Date: 2019-05-24
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is difficult for practical application due to its complexity

Method used

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  • Heterogeneous catalysts/process based on supported/grafted transition metal hydrides for ammonia formation from nitrogen and hydrogen
  • Heterogeneous catalysts/process based on supported/grafted transition metal hydrides for ammonia formation from nitrogen and hydrogen
  • Heterogeneous catalysts/process based on supported/grafted transition metal hydrides for ammonia formation from nitrogen and hydrogen

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[0086] 1. Preparation of Metal Hydride Materials

[0087]In one embodiment, a method of preparing the metal hydride materials of the invention is described. The first step of the process consists in obtaining a solution containing a hydrocarbon salt comprising a hydrocarbon anion (R - ) and metal cations. hydrocarbon anion (R - ) may be an alkyl or substituted alkyl, including any of the aforementioned alkyl or substituted alkyl. The cations may be lithium ions, sodium ions, potassium ions, magnesium ions, zinc ions, and the like. Non-limiting examples of hydrocarbon salts include alkyllithium, alkylmagnesium halide, dialkylmagnesium, alkylzinc halide, dialkylzinc, etc., which can be purchased from commercial sources or prepared under anhydrous conditions by methods known in the art. Prepared below. In one non-limiting example, the hydrocarbon anion (R - ) is neopentyl lithium prepared by reacting neopentyl chloride and chopped Li metal wires in hexane. In step 2 of the...

Embodiment 1

[0109] (neopentyl lithium (LiCH 2 CMe 3 ) preparation)

[0110]Neopentyllithium was prepared according to Davidson et al. (Organomet. Chem. 1973, 57, 269) by reacting neopentyl chloride (10 g) and chopped Li wire (3 g, 1% Na) in hexane to give 5g to 6g neopentyllithium (70% to 80% yield).

Embodiment 2

[0112] (tetraneopentyl peptide, TiNp 4 or [Ti(CH 2 CMe 3 ) 4 ] preparation)

[0113] According to Clark et al., J.Am.Chem.Soc., 1978, 100, 6774 and McCullough et al., J.Am.Chem.Soc., 1985, 107, 5987, to a solution of neopentyllithium in pentane (50 mL 0.65M solution, 32.5 mmol) Ti(OEt) 4 (1.5 mL, 7.3 mmol) in pentane (20 mL). The reaction mixture was stirred at -78°C for 1.5 hours and then at room temperature for 6 hours. The solvent was then removed to give a brown solid which sublimed over 10 hours (55°C, 10 -3 , to obtain the product.

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Abstract

Disclosed is a catalyst and process for producing ammonia (NH3). The process includes contacting a gaseous feed mixture comprising nitrogen (N2) and hydrogen (H2) with a metal hydride material under reaction conditions sufficient to produce a product stream comprising NH3.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims the benefit of priority from US Provisional Patent Application No. 62 / 376015, filed August 17, 2016, which is hereby incorporated by reference in its entirety. Background technique [0003] A. Technical field [0004] The present invention generally relates to the preparation of ammonia (NH 3 )Methods. More specifically, the method includes preparing the NH-containing 3 The reaction conditions of the product stream are made to contain nitrogen (N 2 ) and hydrogen (H 2 ) is contacted with the metal hydride material. [0005] B. Relevant technical description [0006] Any form of nitrogen fixation is required for the production of many industrially important chemicals. Direct artificial nitrogen fixation to ammonia can be challenging because the triple bond of dinitrogen is not easily reduced by activation. Commercial production of ammonia includes the Haber-Bosch process. The process uses ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/04B01J31/12C01B3/00C01B6/02
CPCB01J31/121C01B3/042C01B3/34Y02P20/52B01J31/1625B01J2231/62B01J2531/46B01J2531/48B01J2531/49B01J2531/58B01J2531/64B01J2531/66C01C1/0411B01J21/08Y02E60/32Y02E60/36
Inventor 珍·玛丽·巴塞珍妮特·查克卡玛达迪蒂·莫汉达斯巴拉穆鲁根·维德贾亚库马尔哈利德·巴希利玛诺贾·萨曼塔拉耶
Owner SABIC GLOBAL TECH BV
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