US4795482A — Process for eliminating organic odors and composi…

Claim 1

Independent Claim 135 words

Process for removing odors from an environment attributable to an organic molecular species which comprises contacting and adsorbing at a temperature of from -25° C. to 100° C. the molecules of the organic molecular species with a crystalline siliceous molecular sieve adsorbent which has been at least partially activated, in which at least about 90 percent of the framework tetrahedral oxide units are SiO 2 tetrahedra, which has pore diameters of at least 5.5 Angstroms and has a capacity for adsorbed water of not greater than 10 weight percent when measured at 25° C. and at a water vapor pressure of 4.6 torr, said contacting and adsorbing of the organic molecular species being to such a degree that residual concentrations thereof over the adsorbent are below the detection threshold of the human sense of smell.

Claim 2

Dependent Claim 135 words

Process for removing odors from an environment attributable to an organic molecular species which comprises contacting and adsorbing at a temperature of from -25° C. to 100° C. the molecules of the organic molecular species with a crystalline siliceous molecular sieve adsorbent which has been at least partially activated, in which at least about 90 percent of the framework tetrahedral oxide units are SiO 2 tetrahedra, which has pore diameters of at least 5.5 Angstroms and has a capacity for adsorbed water of not greater than 10 weight percent when measured at 25° C. and at a water vapor pressure of 4.6 torr, said contacting and adsorbing of the organic molecular species being to such a degree that residual concentrations thereof over the adsorbent are below the detection threshold of the human sense of smell.

Claim 3

Dependent Claim 23 words

Process according to claim 1 wherein the siliceous molecular sieve has a capacity for adsorbed water of not greater than 6 weight percent.

Claim 4

Dependent Claim 14 words

Process according to claim 2 wherein the siliceous molecular sieve is a silica polymorph.

Claim 5

Dependent Claim 27 words

Process according to claim 1 wherein the siliceous molecular sieve is an aluminosilicate having a framework SiO 2 /Al 2 O 2 molar ratio greater than 35.

Claim 6

Dependent Claim 23 words

Process according to claim 4 wherein the aluminosilicate has a SiO 2 /Al 2 O 3 molar ratio of from 200 to 500.

Claim 7

Dependent Claim 35 words

Process according to claim 1 wherein the siliceous molecular sieve comprises a mixture of a silica polymorph and an aluminosilicate having a framework SiO 2 /Al 2 O 3 ratio of from 200 to 500.

Claim 8

Dependent Claim 35 words

Process according to claim 1 where the odor-causing organic compound has a vapor pressure at 23° C. of greater than 1 mm. Hg and which when added to liquid water lowers the surface tension thereof.

Claim 9

Dependent Claim 23 words

Process according to claim 1 wherein the crystalline siliceous molecular sieve contains less than 0.2 weight percent alkali metal on an anhydrous basis.

Claim 10

Dependent Claim 150 words

Process for removing an odor from an environment attributable to an aliphatic acid or aldehyde containing a single --COOH or --CHO group and containing less than 12 carbon atoms which comprises contacting and adsorbing at a temperature of from -25° C. to 100° C. said aliphatic acid or aldehyde with a crystalline siliceous molecular sieve which has been at least partially activated, in which at least about 90 percent of the framework tetrahedral oxide units are SiO 2 tetrahedra, which has pore diameters of at least 5.5 Angstroms and has a capacity for adsorbed water of not greater than 10 weight percent when measured at 25° C. and at a water vapor pressure of 4.6 torr, said contacting and adsorbing of the said aliphatic acid or aldehyde being to such a degree that residual concentrations thereof over the adsorbent are below the detection threshold of the human sense of smell.

Claim 11

Dependent Claim 150 words

Process for removing an odor from an environment attributable to an aliphatic acid or aldehyde containing a single --COOH or --CHO group and containing less than 12 carbon atoms which comprises contacting and adsorbing at a temperature of from -25° C. to 100° C. said aliphatic acid or aldehyde with a crystalline siliceous molecular sieve which has been at least partially activated, in which at least about 90 percent of the framework tetrahedral oxide units are SiO 2 tetrahedra, which has pore diameters of at least 5.5 Angstroms and has a capacity for adsorbed water of not greater than 10 weight percent when measured at 25° C. and at a water vapor pressure of 4.6 torr, said contacting and adsorbing of the said aliphatic acid or aldehyde being to such a degree that residual concentrations thereof over the adsorbent are below the detection threshold of the human sense of smell.

Claim 12

Dependent Claim 12 words

Process according to claim 9 wherein the organic compound is isovaleric acid.

Claim 13

Dependent Claim 12 words

Process according to claim 9 wherein the organic compound is butyric acid.

Claim 14

Dependent Claim 144 words

Process for removing an odor from an environment attributable to an organic sulfur-containing compound in which the valence of the sulfur atom is less than 6 which comprises contacting and adsorbing at a temperature of from -25° C. to 100° C. said organic sulfur-containing compound with a crystalline siliceous molecular sieve which has been at least partially activated, in which at least about 90 percent of the framework tetrahedral oxide units are SiO 2 tetrahedra, which has pore diameters of at least 5.5 Angstroms and has a capacity for adsorbed water of not greater than 10 weight percent when measured at 25° C. and at a water vapor pressure of 4.6 torr, said contacting and adsorbing of the said sulfur-containing compound being to such a degree that residual concentrations thereof over the adsorbent are below the detection threshold of the human sense of smell.

Claim 15

Dependent Claim 144 words

Process for removing an odor from an environment attributable to an organic sulfur-containing compound in which the valence of the sulfur atom is less than 6 which comprises contacting and adsorbing at a temperature of from -25° C. to 100° C. said organic sulfur-containing compound with a crystalline siliceous molecular sieve which has been at least partially activated, in which at least about 90 percent of the framework tetrahedral oxide units are SiO 2 tetrahedra, which has pore diameters of at least 5.5 Angstroms and has a capacity for adsorbed water of not greater than 10 weight percent when measured at 25° C. and at a water vapor pressure of 4.6 torr, said contacting and adsorbing of the said sulfur-containing compound being to such a degree that residual concentrations thereof over the adsorbent are below the detection threshold of the human sense of smell.

Claim 16

Dependent Claim 43 words

Process according to claim 12 wherein the organic compound has the general formula R--S--H wherein R represents an alkyl or alkenyl group containing from 1 to 8 carbon atoms or a phenyl or substituted phenyl group containing from 6 to 9 carbon atoms.

Claim 17

Dependent Claim 140 words

Process for removing an odor environment attributable to an organic nitrogen-containing compound in which the valence of the nitrogen atom is 3 which comprises contacting and adsorbing at a temperature of from -25° C. to 100° C. said organic nitrogen-containing compound with a crystalline siliceous molecular sieve which has been at least partially activated, in which at least about 90 percent of the framework tetrahedral oxide units are SiO 2 tetrahedra, which has pore diameters of at least 5.5 Angstroms and has a capacity for adsorbed water of not greater than 10 weight percent when measured at 25° C. and at a water vapor pressure of 4.6 torr, said contacting and adsorbing of the said nitrogen-containing compound being to such a degree that residual concentrations thereof over the adsorbent are below the detection threshold of the human sense of smell.

Claim 18

Dependent Claim 140 words

Process for removing an odor environment attributable to an organic nitrogen-containing compound in which the valence of the nitrogen atom is 3 which comprises contacting and adsorbing at a temperature of from -25° C. to 100° C. said organic nitrogen-containing compound with a crystalline siliceous molecular sieve which has been at least partially activated, in which at least about 90 percent of the framework tetrahedral oxide units are SiO 2 tetrahedra, which has pore diameters of at least 5.5 Angstroms and has a capacity for adsorbed water of not greater than 10 weight percent when measured at 25° C. and at a water vapor pressure of 4.6 torr, said contacting and adsorbing of the said nitrogen-containing compound being to such a degree that residual concentrations thereof over the adsorbent are below the detection threshold of the human sense of smell.

Claim 19

Dependent Claim 37 words

Process according to claim 14 wherein the nitrogen-containing compound has the general formula R 2 NR' wherein R is hydrogen or R' and R' is an alkyl or alkenyl group having from 1 to 6 carbon atoms.

Claim 20

Dependent Claim 11 words

Process according to claim 15 wherein the nitrogen-containing compound is triethylamine.

Claim 21

Dependent Claim 15 words

Process according to claim 14 wherein the nitrogen-containing compound is pyrrole or a substituted pyrrole.

Claim 22

Dependent Claim 11 words

Process according to claim 14 wherein the nitrogen-containing compound is 3-methylindole.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1992-01-03	1992-07-04	1993-01-03	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1996-01-03	1996-07-04	1997-01-03	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2000-01-03	2000-07-04	2001-01-03	$7700.00	Window Closed / Lapsed

Process for eliminating organic odors and compositions for use therein

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