Claims
- 1. In a catalyst which is useful for preparation of alkanolamines represented by the general formula (II) ##STR5## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each independently represent a hydrogen atom, a methyl group or an ethyl group,
- by reaction of an alkylene oxide represented by the general formula (I) ##STR6## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are the same as in the general formula (II),
- with ammonia in a liquid phase; the improvement comprising an inorganic solid catalyst comprising rare earth element selected from the group consisting of lanthanum, yttrium, and mixtures thereof, supported on an inorganic heat-resisting carrier, said catalyst having an average particle size of at least 0.3 mm and in which the volume of pores having a pore size of 10 nm to 10 .mu.m is 0.2 to 1 cm.sup.3 /g.
- 2. The catalyst useful for preparation of alkanolamines according to claim 1, wherein the inorganic heat-resisting carrier is an inorganic ion exchanger.
- 3. The catalyst useful for preparation of alkanolamines according to claim 2, wherein the inorganic ion exchanger is a layered silicate salt.
- 4. A process for preparation of the catalyst useful for preparation of alkanolamines according to claim 1, which comprises mixing a catalyst raw material comprising a rare earth element selected from the group consisting of lanthanum, yttrium, and mixtures thereof, supported on an inorganic heat-resisting carrier compound with 20 to 200% by weight thereof of a pore-forming agent; molding the mixture so as to have an average particle size of 0.3 mm or more; and high temperature treating the molding to combustion removing the pore-forming agent, and thereby forming pores such that the volume of pores having a pore size of 10 nm to 10 .mu.m is 0.2 to 1 cm.sup.3 /g.
- 5. The catalyst according to claim 1, wherein the rare earth element is supported in an amount of from 0.5 to 50% by weight of the carrier.
- 6. The catalyst according to claim 1 wherein the catalyst further comprises an element selected from the group consisting of Groups IVB, VIB, VIIIB, VIII, III and IVA of the periodic table at an atomic ratio, with respect to the rare earth element, of 0 to 10.
- 7. The catalyst of claim 1 wherein the inorganic heat-resisting carrier is montmorillonite.
- 8. A catalyst according to claim 1 wherein the inorganic heat resisting carrier is silicon containing crystalline aluminum phosphate.
- 9. A catalyst according to claim 1 wherein the inorganic heat resisting carrier is a crystalline phosphate.
- 10. A catalyst according to claim 1 wherein the inorganic heat resisting carrier is a zeolite crystalline aluminosilicate.
Priority Claims (2)
Number |
Date |
Country |
Kind |
5-295992 |
Nov 1993 |
JPX |
|
5-295993 |
Nov 1993 |
JPX |
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Parent Case Info
This application is a division of application Ser. No. 08/333,329, filed Nov. 2, 1994, now U.S. Pat. No. 5,599,999, issued Feb. 4, 1997.
US Referenced Citations (6)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0250168 |
Dec 1987 |
EPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
333329 |
Nov 1994 |
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