27-02-2020 дата публикации
Номер: US20200063042A1
Принадлежит:
Methods are provided for using a molecular sieve catalyst for dewaxing formed using a synthesis mixture comprising a morphology modifier. The catalyst may be used, for example, for production of a lubricant base stock. For example, ZSM-48 crystals formed using the morphology modifier (and/or formulated catalysts made using such crystals) can have an increased activity and/or can provide an improved yield during catalytic dewaxing of lubricant base stocks. 2. The method of claim 1 , wherein in step a) a composition comprising a source of hydroxide ions claim 1 , a structure directing agent Q claim 1 , a source of a trivalent element Y claim 1 , a source of a pentavalent element Z claim 1 , a source of halide ions W claim 1 , a source of alkali metal ions M claim 1 , or a source of alkali earth metal cations M or any combination thereof is combined into the synthesis mixture.3. The method of claim 1 , wherein the catalyst has an alpha value of at least 125.4. The method of claim 1 , wherein the catalyst has been calcined.5. The method of claim 1 , wherein the catalyst further comprises a hydrogenation metal comprising Pt claim 1 , Pd claim 1 , Ni claim 1 , W claim 1 , Co claim 1 , Mo claim 1 , or a combination thereof claim 1 , the amount of hydrogenation metal being 0.1 wt % to 20 wt %.6. The method of claim 1 , wherein the catalyst further comprises a binder claim 1 , a surface area of the binder in the bound catalyst being 150 m/g or less.7. The method of claim 1 , wherein the effective dewaxing conditions comprise a temperature of from 200 to 450° C. claim 1 , a hydrogen partial pressure of from 1.8 MPag to 34.6 MPag (250 psig to 5000 psig) claim 1 , and a hydrogen treat gas rate of from 35.6 m/m(200 SCF/B) to 1781 m/m(10 claim 1 ,000 scf/B).8. The method of claim 1 , wherein the structure directing agent Q comprises diquat-5 claim 1 , diquat-6 claim 1 , or a combination thereof.9. The method of claim 1 , wherein the molar ratio L:X in the synthesis mixture is in ...
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