Patent US4234995A successfully refreshed from Google Patents.
Patent EP0026071A1 successfully refreshed from Google Patents.
EP0026071A1
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Process for disproportionating monomethylamine using zeolitic catalyst to produce dimethylamine
Assignee: EIDP Inc
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Filing: 1980-09-10
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Granted: —
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Expires: 2000-09-10
Abstract
Abstract Proces for producing dimethylamine by passing monomethylamine over a crystalline aluminosilicate catalyst selected from… a) mordenite wherein the primary cation is Na, HNa having atleast2% Na, Mg, Ca, Sr or Ba… b) ferrierite wherein the primary metal cation is Na, K, Mg, Ca, Sr or Ba… c) clinoptilolite and… d) phillipsite,… at a temperature of 25-475 DEG C and a pressure of 7-7000 kPa, at a feed rate of 0.1-10 g of monomethylamine/g of catalyst per hour, at a monomethylamine conversion of 15-75%. Selectivity is normally in excess of 80%.
Inventors
- 👤 Frank Julian Weigert
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 19:55
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/64
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
107 words
A continuous process for disproportionating monomethylamine to produce dimethylamine and ammonia which process comprises contacting monomethylamine with a crystalline aluminosilicate catalyst as defined below, namely:- a) mordenite wherein the primary cation is Na, HNa having at least 2% Na by weight, Mg, Ca, Sr or Ba, b) ferrierite wherein the primary metal cation is Na, K, Mg, Ca, Sr or Ba, c) clinoptilolite or d) phillipsite, the contact being effected at a temperature of from 250 to 475°C, a pressure of from 1 to 1000 psi(7 to 7000 kPa), a feed rate of 0.1-10 g of monomethylamine/g of catalyst per hour and a monomethylamine conversion of 15-75%.
Claim 2
Dependent Claim
107 words
A continuous process for disproportionating monomethylamine to produce dimethylamine and ammonia which process comprises contacting monomethylamine with a crystalline aluminosilicate catalyst as defined below, namely:- a) mordenite wherein the primary cation is Na, HNa having at least 2% Na by weight, Mg, Ca, Sr or Ba, b) ferrierite wherein the primary metal cation is Na, K, Mg, Ca, Sr or Ba, c) clinoptilolite or d) phillipsite, the contact being effected at a temperature of from 250 to 475°C, a pressure of from 1 to 1000 psi(7 to 7000 kPa), a feed rate of 0.1-10 g of monomethylamine/g of catalyst per hour and a monomethylamine conversion of 15-75%.
Claim 3
Dependent Claim
30 words
A process as claimed in Claim 1 wherein the temperature is 350-400°C, the pressure is 70-3000 kPa and the feed rate is 0.5-2 g of monomethylamine/g of catalyst per hour.
Claim 4
Dependent Claim
15 words
A process as claimed in Claim 1 or Claim 2 wherein the monomethylamine is anhydrous.
Claim 5
Dependent Claim
17 words
A process as claimed in Claim 1 or Claim 2 wherein the monomethylamine is admixed with water.
Claim 6
Dependent Claim
14 words
A process as claimed in any preceding claim wherein the catalyst is sodium mordenite.
Claim 7
Dependent Claim
25 words
A process as claimed in any one of Claims 1 to 4 wherein the catalyst is hydrogen-sodium mordenite having at least 2% Na by weight.
Claim 8
Dependent Claim
18 words
A process as claimed in any one of Claims 1 to 4 wherein the catalyst is calcium mordenite.
Claim 9
Dependent Claim
18 words
A process as claimed in any one of Claims 1 to 4 wherein the catalyst is natural ferrierite.
Claim 10
Dependent Claim
26 words
A process as claimed in any one of Claims 1 to 4 wherein the catalyst is natural ferrierite which has been subjected to calcium ion exchange.
Claim 11
Dependent Claim
17 words
A process for disproportionating monomethylamine substantiallv as hereinbefore descrihed in any one of the foregoing specific Examples.
Claim 12
Dependent Claim
17 words
A process for disproportionating monomethylamine substantiallv as hereinbefore descrihed in any one of the foregoing specific Examples.
Claim 13
Dependent Claim
12 words
Dimethylamine whenever obtained by a process as claimed in any preceding claim.
References Cited (Backward Citations)
US1926691A
Cited
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