Increasing octane number of light naphtha using a germanium-zeolite catalyst

A catalyst, octane number technology, applied in reformed naphtha, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problem of catalyst not being tolerant to sulfur and so on

Inactive Publication Date: 2012-08-15
SAUDI BASIC IND CORP SA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Catalytic reforming can increase octane by converting some paraffins and naphthenes to aromatics, but platinum reforming catalysts are generally not sulfur tolerant

Method used

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  • Increasing octane number of light naphtha using a germanium-zeolite catalyst
  • Increasing octane number of light naphtha using a germanium-zeolite catalyst
  • Increasing octane number of light naphtha using a germanium-zeolite catalyst

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Embodiment Construction

[0013] Zeolite is a crystalline hydrated aluminosilicate whose crystal framework can also contain other elements besides aluminum and silicon. The term "zeolite" includes not only aluminosilicates, but also substances in which aluminum is substituted by other trivalent elements, and substances in which silicon is substituted by other tetravalent elements. Generally speaking, zeolite is TO 4 Tetrahedral structure, they form a three-dimensional network by sharing oxygen atoms, where T represents a tetravalent element (such as silicon) and a trivalent element (such as aluminum). Zeolites are known catalysts for isomerization, toluene disproportionation, transalkylation, hydrogenation, and alkane oligomerization and aromatization. Some zeolite catalysts, especially those containing Group VIII deposited metals, are prone to sulfur poisoning.

[0014] The germanium zeolite (Ge-zeolite) catalyst on which noble metals are deposited is alkali-exchanged using alkali metals or alkaline ear...

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Abstract

This invention relates to a process for the increasing the octane number of a naphtha hydrocarbon feed having a predominantly paraffin content with a germanium -containing zeolite catalyst. The catalyst is a non-acidic germanium zeolite on which a noble metal, such as platinum, has been deposited. The zeolite structure may be of MTW, MWW, MEL, TON, MRE, FER, MFI, BEA, MOR, LTL or MTT. The zeolite is made non-acidic by being base-exchanged with an alkali metal or alkaline earth metal, such as cesium, potassium, sodium, rubidium, barium, calcium., magnesium and mixtures thereof, to reduce acidity. The catalyst is sulfur tolerant. The hydrocarbon feed may contain sulfur up to 1000 ppm. The present invention could be applicable to a feedstream which is predominantly naphthenes and paraffins.

Description

Technical field [0001] The present invention relates to a method for increasing the octane number of a naphtha hydrocarbon feed mainly containing paraffinic hydrocarbons using alkali-exchanged zeolite, which has germanium in the crystal framework of the zeolite, and deposits noble metals on the zeolite, For example, Pt / CsGeZSM-5. Background technique [0002] Naphtha is a mixture mainly containing linear, branched and cyclic aliphatic hydrocarbons. Light naphtha has 5 to 9 carbon atoms per molecule, and heavy naphtha has 7 to 9 carbon atoms per molecule. . Generally, light naphtha contains cycloalkanes (such as cyclohexane and methylcyclopentane) and linear and branched paraffins (such as hexane and pentane). Light naphtha usually contains 60% to 99% by weight of paraffins and naphthenes. Light naphtha can be characterized as having a molecular weight range of 70-150g / mol and a specific gravity range of 0.6-0.9g / cm 3 , Petroleum fractions with a boiling point range of 50-320°F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C5/13
CPCB01J29/047B01J29/44B01J2229/20C10G35/065C10G35/085C10G2300/4018C10G2300/1044C10G2300/1081C10G2300/1096C10G2300/202C10G2300/305C07C5/13C07C5/41B01J20/18B01J23/44
Inventor 斯科特·史蒂文森保罗·E·埃利斯迈克·迈尔达斯廷·法梅尔阿拉·汉马梅多夫斯科特·米切尔
Owner SAUDI BASIC IND CORP SA
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