Production of light olefins

Patent · Tue Jun 30 04:00:00 EDT 1987

OSTI ID:6181842

Kaiser, S W

This patent describes the process for making light olefins containing 2 to 4 carbon atoms which comprise contacting a feedstock comprising one or more aliphatic hetero compounds with a silicoaluminophosphate molecular sieve in the presence of a diluent. The silicoaluminophosphate molecular sieve comprises a microporous crystalline silicoaluminophosphate whose unit empirical formula is in the as-synthesized and anhydrous form. ''R'' represents at lease one organic templating agent present in the intracrystalline pore system; ''m'' has a value of from 0.02 to 0.3; ''m'' represents the moles of ''R'' present per mole of (Si/sub x/Al/sub y/P/sub z/)O/sub 2/; ''x'', ''y'' and ''z'' represent the mole fractions of silicon, aluminum and phosphorus respectively, present as tetrahedral unit. The mole fractions are within the pentagonal compositional are defined by points A, B, C, D and E of the ternary diagram at effective process conditions to produce light olefins. The improvement correlates the diluent to the silicoaluminophosphate. The average kinetic diameter of the diluent molecules is greater than the average pore size of the silicoaluminophosphate molecular sieve.

• Assignee: Union Carbide Corp., Danbury, CT
• Patent Number(s): US 4677242
• OSTI ID: 6181842
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORBENTS
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM PHOSPHATES
CARBON
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CRYSTAL STRUCTURE
ELEMENTS
HYDROCARBONS
KINETICS
MOLECULAR SIEVES
NONMETALS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
QUANTITY RATIO
REACTION KINETICS
SILICON COMPOUNDS
SILICON PHOSPHATES
SYNTHESIS