Production of light olefins

Claim 2

The process of making light olefins containing 2 to 4 carbon atoms which comprises contacting a feedstock comprising one or more of methanol, ethanol, dimethyl ether, diethyl ether and mixtures thereof with a silicoaluminophosphate molecular sieve wherein the silicoaluminophosphate molecular sieve comprises a microporous crystalline silicoaluminophosphate whose unit empirical formula in the as-synthesized and anhydrous form is mR:(Si.sub.x Al.sub.y P.sub.z)O.sub.2 wherein "R" represents at least 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 x Al y P z )O 2 ; "x", "y" and "z" represent the mole fractions of silicon, aluminum and phosphorus respectively, present as tetrahedral units, said mole fractions being such that they are within the pentagonal compositional area defined by points A, B, C, D and E of the ternary diagram which is FIG. 1 of the drawings.

Claim 3

The process of making light olefins containing 2 to 4 carbon atoms which comprises contacting a feedstock comprising one or more of methanol, ethanol, dimethyl ether, diethyl ether and mixtures thereof with a silicoaluminophosphate molecular sieve wherein the silicoaluminophosphate molecular sieve comprises a microporous crystalline silicoaluminophosphate whose unit empirical formula in the as-synthesized and anhydrous form is mR:(Si.sub.x Al.sub.y P.sub.z)O.sub.2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" has a value of from zero to 0.3; "m" represents the moles of "R" present per mole of (Si x Al y P z )O 2 ; "x", "y" and "z" represent the mole fractions of silicon, aluminum and phosphorus, respectively, present as tetrahedral units, said mole fractions being such that they are within the pentagonal compositional area defined by points A, B, C, D and E of the ternary diagram which is FIG. 1 of the drawings, said silicoaluminophosphate having a characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in any one of Tables I, III, V, VIII, X, XIII, XVII, XX, XXII, XXIV, XXVI, XXVIII or XXX.

Claim 4

The process of making light olefins containing 2 to 4 carbon atoms which comprises contacting a feedstock comprising one or more of methanol, ethanol, dimethyl ether, diethyl ether and mixtures thereof with a silicoaluminophosphate molecular sieve wherein the silicoaluminophosphate molecular sieve comprises a microporous crystalline silicoaluminophosphate whose unit empirical formula in the as-synthesized and anhydrous form is mR:(Si.sub.x Al.sub.y P.sub.z)O.sub.2 wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" has a value of from zero to 0.3; "m" represents the moles of "R" present per mole of (Si x Al y P z )O 2 ; "x", "y" and "z" represent the mole fractions of silicon, aluminum and phosphorus, respectively, present as tetrahedral units, said mole fractions being such that they are within the pentagonal compositional area defined by points A, B, C, D and E of the ternary diagram which is FIG. 1 of the drawings, said silicoaluminophosphate having a characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in any one of Tables I, III, V, VIII, X, XIII, XVII, XX, XXII, XXIV, XXVI, XXVIII or XXX.

Claim 5

The process of claim 1 wherein the silicoaluminophosphate is characterized by adsorption of oxygen and negligible adsorption of isobutane.

Claim 6

The process of claim 1 wherein the silicoaluminophosphate is characterized by adsorption of Xenon and negligible adsorption of isobutane.

Claim 7

The process of claim 1 wherein the silicoaluminophosphate is characterized by adsorption of n-hexane and negligible adsorption of isobutane.

Claim 8

The process of claim 1 wherein the silicoaluminophosphate has mole fractions of silicon, aluminum and phosphorus within the pentagonal compositional area defined by points a, b, c, d and e of the ternary diagram which is FIG. 2 of the drawings.

Claim 9

The process of claims 1 or 6 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table I.

Claim 10

The process of claims 1 or 6 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table III.

Claim 11

The process of claims 1 or 6 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table V.

Claim 12

The process of claims 1 or 6 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table VIII.

Claim 13

The process of claims 1 or 6 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table X.

Claim 14

The process of claims 1 or 6 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table XIII.

Claim 15

The process of claims 1 or 6 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table XVII.

Claim 16

The process of claims 1 or 6 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table XX.

Claim 17

The process of claims 1 or 6 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table XXII.

Claim 18

The process of claims 1 or 6 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table XXIV.

Claim 19

The process of claims 1 or 6 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table XXVI.

Claim 20

The process of claims 1 or 6 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table XXVIII.

Claim 21

The process of claims 1 or 6 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table XXX.

Claim 22

The process of claim 1 or 6 wherein in the unit empirical formula mR:(Si.sub.x Al.sub.y P.sub.z)O.sub.2 "m" has a value of zero and the silicoaluminophosphate has an X-ray powder diffraction pattern as set forth in any one of Tables C, E, K, M, O, P, R, T, Y, AA and CC.

Claim 23

The process of claim 1 or 2 wherein said feedstock contains diluent.

Claim 24

The process of claim 21 wherein said diluent is water and comprises between about 1 and about 99 molar percent water.

Claim 25

The process of claim 1 or 2 wherein the feedstock is contacted with said silicoaluminophosphate at a temperature between about 200° and about 700° C.

Claim 26

The process of claim 23 wherein the feedstock is contacted with said silicoaluminophosphate at a temperature between about 250° and about 600° C.

Claim 27

The process of claim 1 or 2 wherein the process is conducted at a pressure between about 0.1 atmosphere and about 1000 atmospheres.

Claim 28

The process of claim 25 wherein the process is conducted at a pressure between about 0.1 atmosphere and about 100 atmospheres.

Claim 29

The process of claim 1 or 2 wherein said process is carried out in the vapor phase.

Claim 30

The process of claim 1 or 2 wherein said process is carried out in the liquid phase.

Claim 31

The process of claim 1 or 2 wherein the WHSV is between about 0.01 hr -1 and about 100 hr -1 .

Claim 32

The process of claim 29 wherein the WHSV is between about 0.1 hr -1 and about 40 hr -1 .

Claim 33

The process of claim 1 or 2 wherein the feedstock comprises methanol.

Claim 34

The process of claim 1 or 2 wherein the feedstock comprises methanol and dimethyl ether.

Claim 35

The process of claim 1 or 2 wherein the feedstock comprises ethanol.

Claim 36

The process of claim 1 or 2 wherein the feedstock comprises ethanol and diethyl ether.

Claim 37

The process of claim 1 or 2 wherein the feedstock consists essentially of methanol, dimethyl ether and water.

Claim 38

The process of claim 1 or 2 wherein the feedstock consists essentially of methanol and water.

Claim 39

The process of claim 1 or 2 wherein the feedstock consists essentially of ethanol and water.

Claim 40

The process of claim 1 or 2 wherein the feedstock consists essentially of dimethyl ether and water.

Claim 41

The process of claim 21 wherein the diluent is nitrogen.

Claim 42

The process of claim 21 wherein the diluent is a paraffin.

Claim 43

The process of claim 21 wherein the diluent is helium.

Claim 44

The process of claim 21 wherein the diluent is an aromatic compound.

Claim 45

The process of claim 1 wherein light olefins constitute at least about 25 molar percent of the hydrocarbon products.

Claim 46

The process of claim 43 wherein light olefin products constitute in excess of 50 molar percent of the hydrocarbon products.

Claim 47

The process of claim 2 wherein the silicoaluminophsphate has mole fractions of silicon, aluminum and phosphorus within the pentagonal compositional area defined by points a, b, c, d and e of the ternary diagram which is FIG. 2 of the drawings.

Claim 48

The process of claims 2 or 45 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table I.

Claim 49

The process of claims 2 or 45 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table III.

Claim 50

The process of claims 2 or 45 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table V.

Claim 51

The process of claims 2 or 45 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table VIII.

Claim 52

The process of claims 2 or 45 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table X.

Claim 53

The process of claims 2 or 45 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table XIII.

Claim 54

The process of claims 2 or 45 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table XVII.

Claim 55

The process of claims 2 or 45 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table XX.

Claim 56

The process of claims 2 or 45 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table XXII.

Claim 57

The process of claims 2 or 45 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table XXIV.

Claim 58

The process of claims 2 or 45 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table XXVI.

Claim 59

The process of claims 2 or 45 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table XXVIII.

Claim 60

The process of claims 2 or 45 wherein the silicoaluminophosphate has the characteristic X-ray powder diffraction pattern which contains at least the d-spacings set forth in Table XXX.