Systems and methods are provided for modifying the composition of the conversion catalyst in a reactor for oxygenate conversion during conversion of an oxygenate feed to allow for adjustment of the slate of conversion products. The modification of the conversion catalyst can be performed by introducing a substantial portion (relative to the amount of catalyst inventory in the reaction system) of make-up catalyst having a distinct composition relative to the conversion catalyst in the reaction system. Introducing the distinct composition of make-up catalyst can modify the composition of the conversion catalyst in the reactor to allow for changes in the resulting product slate. By introducing the distinct catalyst composition, the conversion catalyst in the reactor can correspond to a different composition of catalyst than the overall average catalyst composition within the catalyst inventory in the reaction system.

A feed mixture comprising at least one C.sub.3 olefin and/or at least one C.sub.4 olefin may be contacted with a zeolite catalyst under oligomerization reaction conditions to form a product mixture comprising a plurality of olefin oligomers comprising C.sub.12 and/or C.sub.16 olefin oligomers having an average branching index, as measured by gas chromatography, of about 2.2 or less, such as about 1.3 to about 2.0. The olefin oligomers may be contacted with a syngas mixture comprising carbon monoxide and hydrogen in the presence of a hydroformylation catalyst to form a hydroformylation reaction product, which may be subsequently reduced to form a plurality of branched alcohols. The branched alcohols, in turn, may be converted into an amphiphilic compound, such as a plurality of branched alcohol sulfates.

A feed mixture comprising at least one C.sub.3 olefin and/or at least one C.sub.4 olefin may be contacted with a zeolite catalyst under oligomerization reaction conditions to form a product mixture comprising a plurality of olefin oligomers. The zeolite catalyst, optionally with one or more further modifications, may be selected for operability at high WHSV values that may produce at least C.sub.12 olefins in the product mixture having an average branching index of about 2.2 or less. Under suitable conditions, C.sub.10-C.sub.13 olefins may comprise at least about 25% of the product mixture, M based on total olefin oligomers. Percentage conversion of the at least one C.sub.3 olefin and/or at least one C.sub.4 olefin may impact the average branching index of at least C.sub.12 olefin oligomers and selectivity for C.sub.10-C.sub.13 olefin oligomers. An amount of C.sub.4 olefin in the feed mixture may produce a targeted selectivity for at least C.sub.1 olefins.

A feed mixture comprising at least one C.sub.3 olefin and/or at least one C.sub.4 olefin may be contacted with a zeolite catalyst under oligomerization reaction conditions to form a product mixture comprising a plurality of olefin oligomers comprising C.sub.12 olefin oligomers having an average branching index, as measured by gas chromatography, of about 2.2 or less, such as about 1.3 to about 2.0. The olefin oligomers may be contacted with a syngas mixture comprising carbon monoxide and hydrogen in the presence of a hydroformylation catalyst to form a hydroformylation reaction product, which may be subsequently reduced to form a plurality of branched alcohols. The branched alcohols, in turn, may be converted into an amphiphilic compound, such as a plurality of branched alcohol sulfates.

A composition of branched fatty acids or esters thereof and the processes for preparing such compositions and to a process of producing a composition of branched C10-C24 fatty acids or esters thereof with a high portion, at least 70% by weight, of mono and polybranched C10-C24 fatty acids or esters thereof.

A method for preparing aromatic hydrocarbons with carbon dioxide hydrogenation, comprising: directly converting a mixed gas consisting of carbon dioxide and hydrogen with the catalysis of a composite catalyst under reaction conditions of a temperature of 250-450 C., a pressure of 0.01-10.0 MPa, a feedstock gas hourly space velocity of 500-50000 mL/(h.Math.g.sub.cat) and a H.sub.2/CO.sub.2 molar ratio of 0.5-8.0, to produce aromatic hydrocarbons. The composite catalyst is a mixture of a first component and a second component. The first component is an iron-based catalyst for making low-carbon olefin via carbon dioxide hydrogenation, and the second component is at least one of metal modified or non-modified molecular sieves which are mainly used for olefin aromatization. In the method, CO.sub.2 conversion per pass may be above 33%, the hydrocarbon product selectivity may be controlled to be above 80%, the methane content is lower than 8%, C.sub.5+ hydrocarbon content is higher than 65% and the proportion of the aromatic hydrocarbons in C.sub.5+ hydrocarbons may be above 63%.

A new crystalline molecular sieve designated SSZ-95 is disclosed. In general, SSZ-95 is synthesized from a reaction mixture suitable for synthesizing MTT-type molecular sieves and maintaining the mixture under crystallization conditions sufficient to form product. The product molecular sieve is subjected to a pre-calcination step, and ion-exchange to remove extra-framework cations, and a post-calcination step. The molecular sieve has a MTT-type framework and a H-D exchangeable acid site density of 0 to 50% relative to molecular sieve SSZ-32.

The present disclosure is directed to a high-silica form of zeolite SSZ-32x, its synthesis in fluoride media using dipropylamine as a structure directing agent, and its use in catalytic processes.

A new crystalline aluminosilicate zeolite comprising a MTT framework has been synthesized that has been designated UZM-53. This zeolite is represented by the empirical formula:
M.sup.+.sub.mR.sub.rAl.sub.1-xE.sub.xSi.sub.yO.sub.z
where M represents sodium, potassium or a combination of sodium and potassium cations, R is the organic structure directing agent or agents derived from reactants R1 and R2 where R1 is diisopropanolamine and R2 is a chelating diamine, and E is an element selected from the group consisting of gallium, iron, boron and mixtures thereof. Catalysts made from UZM-53 have utility in various hydrocarbon conversion reactions such as oligomerization.

The present invention provides a catalyst composition for use in a catalytic cracking process, said catalyst composition comprises 3.5 to 15.5% of pentasil zeolite, 9 to 40% of ultra-stable Y (USY) or rare earth exchanged USY (REUSY) zeolite, 3.5 to 15% of large pore active matrix based bottom up gradation component and 0.3 to 3% of a metal trap component, the percentage being based on weight of the catalyst composition. The present invention also provides a process for preparing the said catalyst composition and a catalytic cracking process comprising contacting the said catalyst composition with a feedstock.