US4003825A
Expired / Lapsed
US
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Synthetic amorphous silicas of predetermined pore distribution, method of producing same and process of using same
Assignee: Mobil Oil AS
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Filing: 1975-12-08
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Granted: 1977-01-18
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Expires: 1995-12-08
Abstract
Abstract Novel amorphous siliceous materials having shape-selective sorption properties are prepared by a novel process of (1) hydrolyzing an organosilicon compound of the formula R[Si]X3 alone or in the presence of one or more compounds either of the formula R'nMYm, wherein R and R' are non-hydrolyzable organic groups, X is a hydrolyzable group, Y is the same as X or oxygen, [Si] is silicon or -Si(R)2-O-Si<, M is metal or non-metal, including silicon, of any group of the Periodic Table other than IA, IIA, VIIA or O, m is a number over 0 and up to 8 and n is 0 or a number less than 8, or an inorganic compound consisting of an anionic portion made up of M and Y and a cationic portion of either hydrogen, alkali or alkaline earth metal or ammonium; (2) effecting condensation polymerization of the hydrolyzed product; and (3) calcining the resulting polymerized product to convert all the R and R' groups to hydroxy or hydrogen. Pore size distribution of the final composition is primarily controlled by appropriate selection of the R group of the R[Si]X3 precursor. The amorphous synthetic solids of this invention are useful in such conversion processes as shape-selective cracking, hydrocracking, hydrogenation-dehydrogenation, oxidation, and methanation processes. They are also useful as sorbents and catalyst supports.
Inventors
- 👤 Thomas O. Mitchell
- 👤 Darrell D. Whitehurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:54
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G45/06; C10G45/08; B; B01; B01J; B01J21/00; B01J21/06; B01J21/08; B01J37/00; B01J37/08; B01J37/082; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/38; C07; C07C; C07C2521/00; C07C2521/02; C07C2521/06; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/44; C07C2523/70; C07C2523/74; C07C2523/75; C07C2523/755; C07C2531/00; C07C2531/02; C07C2531/06
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
179 words
A shape-selective-cracking process wherein hydrocarbon feedstock is subjected to cracking conditions in the presence of a solid containing, at least in part, a synthetic amorphous solid having shape selective properties prepared by the steps of (1) hydrolzying, (2) polymerizing at up to 20° C in the presence of water a silane having the formula R(Si)X 3 , wherein R is a nonhydrolyzable organic group, X is a hydrolyzable group and (Si) is selected from the group consisting of -Si< and -Si(R) 2 -O-Si<, and (3) calcining the polymerizing product said silane being admixed with a second compound, R' n MY m , wherein R' is selected from the group consisting of the same groups as R, Y is selected from the group consisting of the same groups as X and oxygen, M is at least one member selected from the group consisting of Groups IIIA, IVA, IVB, VA, VB, VIB, VIIB and VIII of the Periodic Table, m is any number greater than 0 and up to 8 and n is from 0 to any number less than 8.
Claim 2
Dependent Claim
179 words
A shape-selective-cracking process wherein hydrocarbon feedstock is subjected to cracking conditions in the presence of a solid containing, at least in part, a synthetic amorphous solid having shape selective properties prepared by the steps of (1) hydrolzying, (2) polymerizing at up to 20° C in the presence of water a silane having the formula R(Si)X 3 , wherein R is a nonhydrolyzable organic group, X is a hydrolyzable group and (Si) is selected from the group consisting of -Si< and -Si(R) 2 -O-Si<, and (3) calcining the polymerizing product said silane being admixed with a second compound, R' n MY m , wherein R' is selected from the group consisting of the same groups as R, Y is selected from the group consisting of the same groups as X and oxygen, M is at least one member selected from the group consisting of Groups IIIA, IVA, IVB, VA, VB, VIB, VIIB and VIII of the Periodic Table, m is any number greater than 0 and up to 8 and n is from 0 to any number less than 8.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein R is selected from the group consisting of alkyl, cycloalkyl, aryl, alkenyl, cycloalkenyl and the said groups hydroxy-substituted, halogen-substituted and amino-substituted.
Claim 4
Dependent Claim
32 words
The process of claim 1 wherein X is selected from the group consisting of halogen and alkoxy of from 1 to 10 carbon atoms, alkali metaloxy, alkaline earth metaloxy, carboxy and amino.
Claim 5
Dependent Claim
9 words
The process of claim 3 wherein X is chlorine.
Claim 6
Dependent Claim
35 words
The process of claim 4 wherein R(Si)X 3 is selected from the group consisting of phenyl trichlorosilane, (C 6 H 5 ) 3 Si-O-SiCl 3 , methyl trichlorosilane, ethyl trichlorosilane, dodecyl trichlorosilane and mixtures thereof.
Claim 7
Dependent Claim
24 words
The process of claim 1 wherein the calcination step is carried out in a stepwise heating up to a temperature up to 600° C.
Claim 8
Dependent Claim
25 words
The process of claim 1 wherein M is selected from the group consisting of aluminum, phosphorus, nickel, cobalt, vanadium, titanium, platinum, palladium, tin and boron.
Claim 9
Dependent Claim
9 words
The process of claim 7 wherein M is aluminum.
Claim 10
Dependent Claim
20 words
The process of claim 7 wherein the second compound is an aluminum alkoxide of from 1 to 10 carbon atoms.
Claim 11
Dependent Claim
12 words
The process of claim 7 wherein the second compound is aluminum chloride.
Claim 12
Dependent Claim
17 words
The process of claim 1 wherein M is a member of Group VIII of the Periodic Table.
Claim 13
Dependent Claim
25 words
The process of claim 11 wherein there is present in the final calcined product a member selected from the group consisting of platinum and palladium.
Claim 14
Dependent Claim
27 words
The process of claim 7 wherein there is present in the final calcined product aluminum and a member selected from the group consisting of cobalt and nickel.
Claim 15
Dependent Claim
43 words
The process of claim 7 wherein there is present in the hydrolysis and polymerization steps an inorganic compound consisting of an anion of M and Y and a cation selected from the group consisting of hydrogen, alkali metal, alkaline earth metal and ammonium.
Claim 16
Dependent Claim
26 words
The process of claim 14 wherein the said compound is selected from the group consisting of boric acid, sodium ethyl chloroplatinate, chloroplatinic acid and sodium aluminate.
Claim 17
Dependent Claim
38 words
The process of claim 1 wherein silanes selected from the group consisting of SiX 4 , R 2 (Si)X 2 and R 3 (Si)X are also present, the concentration of R(Si)X 3 being at least 33% by weight.
Claim 18
Dependent Claim
9 words
The process of claim 3 wherein X is halogen.
Claim 19
Dependent Claim
9 words
The process of claim 3 wherein X is alkoxy.
Claim 20
Dependent Claim
9 words
The process of claim 18 wherein X is methoxy.
Claim 21
Dependent Claim
20 words
The process of claim 19 wherein the silane is selected from the group consisting of phenyl trimethoxysilane and ethylenediaminopropyl trimethoxysilane.
Claim 22
Dependent Claim
19 words
The process of claim 7 wherein M is selected from the group consisting of aluminum, boron, phosphorus and tin.
Claim 23
Dependent Claim
24 words
The process of claim 1 wherein the steps of hydrolyzing and polymerizing are carried out in the presence of water and an organic solvent.
Claim 24
Dependent Claim
12 words
The process of claim 22 wherein the organic solvent is an alcohol.
Claim 25
Dependent Claim
10 words
The process of claim 23 wherein the alcohol is methanol.
Claim 26
Dependent Claim
23 words
The process of claim 1 wherein the steps of hydrolyzing and polymerizing are carried out in the presence of water and a base.
Claim 27
Dependent Claim
18 words
The process of claim 25 wherein the base is selected from the group consisting of pyridine and triethylamine.
Claim 28
Dependent Claim
17 words
The process of claim 1 wherein said hydrocarbon feedstock is comprised of a mixture of paraffin isomers.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |