Process of presulfuration of hydrocarbon processing catalyst and catalyst produced by the process
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United States of America Patent
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Dec 8, 1992
Grant Date -
N/A
app pub date -
Oct 17, 1991
filing date -
Apr 19, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
For the sulfuration a new or regenerated catalyst, containing a support with a base of at least one metal oxide or a metalloid, and at least one active metal, the catalyst is impregnated in the absence of hydrogen with an aqueous ammonium sulfide solution at a temperature between 0.degree. and 50.degree., in the presence of at least one sulfur additive selected in the group consisting of thiodazoles, thio acids, thio amides, thiocyanates, thio esters, thiophenols, thiosemicarbazides, thioureas, mercapto alcohols of formula ##STR1## where n and m are whole numbers, R.sub.1, R.sub.2, R.sub.3, R.sub.4, identical or different, are atoms of hydrogen or alkyl, aryl, aralkyl, alkylaryl organic radicals, thiols of formula R.sub.1 --SH where R is an organic radical, thio ethers of formula R.sub.1 --S--R.sub.2 where R.sub.1 and R.sub.2 are defined as above and the organic disulfides of formula R.sub.1 --S--S--R.sub.2 where R.sub.1 and R.sub.2 are defined as above.
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