Patent
Process for recovery of nickel and magnesium from a naturally occurring material
| العنوان: | Process for recovery of nickel and magnesium from a naturally occurring material |
|---|---|
| Patent Number: | 5,229,088 |
| تاريخ النشر: | July 20, 1993 |
| Appl. No: | 07/846,141 |
| Application Filed: | March 05, 1992 |
| مستخلص: | A process is disclosed for recovering nickel and magnesium from natural material by extracting them in the presence of a spent sulfur containing iron based hydroconversion catalyst, under oxidative conditions. |
| Inventors: | Ramirez de Agudelo, Maria M. (Caracas, VEX); Manrique, Milton (Caracas, VEX); Seaton, Carlos (Caracas, VEX); Hurtado, Juan (Caracas, VEX) |
| Assignees: | Intevep, S.A. (Caracas, VEX) |
| Claim: | What is claimed is |
| Claim: | 1. A process for recovering nickel and magnesium from a naturally occurring material, comprising the steps of |
| Claim: | (1) providing a spent iron based hydroconversion catalyst having a sulfur content of at least 10% by weight; |
| Claim: | (2) providing a naturally occurring material having a nickel content of at least 0.1% by weight and a magnesium content of at least 0.1% by weight; |
| Claim: | (3) admixing the catalyst and the material in a ratio of catalyst to material in a range of 1:2-8:1 by weight to form a mixture; |
| Claim: | (4) adding water in an amount sufficient to form a suspension of the mixture in water having a pH no greater than 4; |
| Claim: | (5) subjecting the suspension to an elevated temperature and an elevated pressure; and |
| Claim: | (6) injecting an oxidant into the suspension at a rate sufficient to maintain a substantially homogeneous distribution of catalyst, material, and oxidant in the suspension, whereby nickel and magnesium are extracted from the material into the solution. |
| Claim: | 2. A process according to claim 1, wherein the catalyst has an Fe content of 20-70% by weight. |
| Claim: | 3. A process according to claim 1, wherein the sulfur content is at least 15% by weight. |
| Claim: | 4. A process according to claim 1, further comprising the step of powdering the catalyst and the material to an average particle diameter of 200 microns or less. |
| Claim: | 5. A process according to claim 1, wherein the ratio of catalyst to material is in a range of 1:1-5:1. |
| Claim: | 6. A process according to claim 1, wherein the elevated temperature is in a range of 50.degree.-350.degree. C. and the elevated pressure is in a range of 200-600 psi. |
| Claim: | 7. A process according to claim 1, wherein the elevated temperature is in a range of 150.degree.-300.degree. C. and the elevated pressure is in a range of 300-500 psi. |
| Claim: | 8. A process according to claim 1, wherein the oxidant is selected from the group consisting of air, oxygen, and mixtures thereof. |
| Current U.S. Class: | 4231/505; 423/155 |
| Current International Class: | C22B 2300; C22B 2600 |
| Patent References Cited: | 3773891 November 1973 O'Neill 3804613 April 1974 Zundel et al. 3880981 April 1975 Gringarao et al. 4125588 November 1978 Hansen et al. 4410498 October 1983 Hatch et al. 4591426 May 1986 Krasuk et al. |
| Primary Examiner: | Langel, Wayne |
| Assistant Examiner: | Bos, Steven |
| Attorney, Agent or Firm: | Bachman & LaPointe |
| رقم الانضمام: | edspgr.05229088 |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |