The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 05, 1994
Filed:
Oct. 25, 1990
Liwen Wei, Somerville, NJ (US);
Catherine L Coyle, Mendham, NJ (US);
Thomas R Halbert, Baton Rouge, LA (US);
Edward I Stiefel, Bridgewater, NJ (US);
Exxon Research and Engineering Company, Florham Park, NJ (US);
Abstract
A method for preparing molybdenum and sulfur containing compounds of the general formula X.sub.2 Mo.sub.2 S.sub.12.yH.sub.2 O, where X is a cation selected from the group consisting of Na.sup.+, K.sup.+, R.sub.4 N.sup.+, R.sub.3 NH.sup.+, R.sub.2 NH.sub.2.sup.+, RNH.sub.3.sup.+, NH.sub.4.sup.+, R.sub.4 P.sup.+, R.sub.4 As.sup.+,(R.sub.3 P).sub.2 N.sup.+, R is a C.sub.1 -C.sub.30 alkyl, C.sub.6 -C.sub.30 aryl, C.sub.7 -C.sub.30 aralkyl or C.sub.2 -C.sub.30 alkoxyalkyl group and mixtures thereof, and y is from 0 to 2. The method comprises preparing a sulfide solution that contains from about 9 wt. % to about 13 wt. % sulfide sulfur; contacting the solution with elemental sulfur and a hydroxide; adding a molybdenum compound for a time and at a temperature sufficient to form a reaction mixture and a precipitate; separating the precipitate; and contacting the remaining reaction mixture with additional sulfide solution to form (NH.sub.4 ).sub.2 Mo.sub.2 S.sub.12.yH.sub.2 O. When compounds containing cations other than NH.sub.4.sup.+ are to be produced, the (NH.sub.4).sub.2 Mo.sub.2 S.sub.12.yH.sub.2 O is contacted with a cation exchange compound containing a desired substitute cation selected from above and an anion selected from the group consisting of Cl.sup.-, Br.sup.-, F.sup.-, I.sup.-, BF.sub.4.sup.-, PF.sub.6.sup.-, OH.sup.-, BR.sub.4.sup.- where R is a C.sub.1 -C.sub.30 alkyl, C.sub.6 -C.sub.30 aryl, C.sub.7 -C.sub.30 aralkyl or C.sub.2 -C.sub.30 alkoxyalkyl group, and mixtures thereof, in the presence of a solvent and for a time and at a temperature sufficient to form X.sub.2 Mo.sub.2 S.sub.12.yH.sub.2 O, where X is other than NH.sub.4.sup.+.