Alkylation/transalkylation in presence of crystalline aluminosilicate catalyst
AssigneeMobil Oil Corporation
InventorsWerner O. Haag, David H. Olson
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Abstract
A process is provided for alkylation or transalkylation of aromatic hydrocarbons by contacting same with an alkylating or transalkylating agent in a reaction zone maintained under alkylation/transalkylation effective conditions and in the presence of a catalyst comprising a crystalline aluminosilicate zeolite characterized by a unique X-ray diffraction pattern, said catalyst under said conditions being capable of affording a high and selective yield of desired alkylaromatic product while maintaining excellent aging properties.
Claims36
A process for effecting alkylation of an aromatic hydrocarbon charge selected from the group consisting of aromatic hydrocarbons and aromatic hydrocarbons containing a non-polar substituent which comprises contacting said hydrocarbon charge with an alkylating agent under conditions effective for accomplishing said alkylation including a reactor inlet temperature between about 100.degree. F and about 1200.degree. F, a reactor pressure between atmospheric and about 3000 psig, employing a mole ratio of hydrocarbon charge to alkylating agent in the approximate range of 1:3 to 20:1 and a weight hourly space velocity between about 0.5 and 1000 in the presence of a catalyst comprising a crystalline aluminosilicate zeolite, or a product of heating said zeolite to a temperature of from about 500.degree. F to about 1500.degree. F, characterized by the X-ray diffraction pattern of Table 1 and a formula, expressed in terms of mole ratios of oxides in the anhydrous state, as follows:
- (0.3-2.5)R.sub.2 O:(0-0.8)M.sub.2 O:Al.sub.2 O.sub.3 :
- >
- 8SiO.sub.2
- wherein R is an organic nitrogen-containing cation derived from ethylenediamine or pyrrolidine and M is an alkali metal cation, said zeolite being further characterized, after calcination at 600.degree. C, by exhibiting a sorption ratio of n-hexane/2-methylpentane of less than 10 at 90.degree. C.
A process for effecting transalkylation of an aromatic hydrocarbon charge selected from the group consisting of aromatic hydrocarbons and aromatic hydrocarbons containing a non-polar substituent which comprises contacting said hydrocarbon charge with a transalkylating agent under conditions effective for accomplishing said transalkylation including a reactor inlet temperature between about 650.degree. F and about 1100.degree. F, a reactor pressure between atmospheric and about 3000 psig, employing a mole ratio of hydrocarbon charge to transalkylating agent in the approximate range of 1:3 to 20:1 and a weight hourly space velocity between about 0.5 and 1000 in the presence of a catalyst comprising a crystalline aluminosilicate zeolite, or a product of heating said zeolite to a temperature of from about 500.degree. F to about 1500.degree. F, characterized by the X-ray diffraction pattern of Table 1 and a formula, expressed in terms of mole ratios of oxides in the anhydrous state, as follows:
- (0.3-2.5)R.sub.2 O:(0-0.8)M.sub.2 O:Al.sub.2 O.sub.3 :
- >
- 8SiO.sub.2
- wherein R is an organic nitrogen-containing cation derived from ethylenediamine or pyrrolidine and M is an alkali metal cation, said zeolite being further characterized, after calcination at 600.degree. C, by exhibiting a sorption ratio of n-hexane/2-methylpentane of less than 10 at 90.degree. C.
A process for effecting alkylation of an aromatic hydrocarbon charge selected from the group consisting of aromatic hydrocarbons and aromatic hydrocarbons containing a non-polar substituent which comprises contacting said hydrocarbon charge with an alkylating agent under conditions effective for accomplishing said alkylation including a reactor inlet temperature between about 100.degree. F and about 1200.degree. F, a reactor pressure between atmospheric and about 3000 psig, employing a mole ratio of hydrocarbon charge to alkylating agent in the approximate range of 1:3 to 20:1 and a weight hourly space velocity between about 0.5 and 1000 in the presence of a catalyst comprising a crystalline aluminosilicate zeolite, or a product of heating said zeolite to a temperature of from about 500.degree. F to about 1500.degree. F, characterized by the X-ray diffraction pattern of Table 2 and a formula, expressed in terms of mole ratios of oxides in the anhydrous state, as follows:
- (0.3-2.5)R.sub.2 O:(0-0.8)M.sub.2 O:Al.sub.2 O.sub.3 :
- >
- 8SiO.sub.2
- wherein R is an organic nitrogen-containing cation derived from a 2-(hydroxyalkyl) trialkylammonium compound and M is an alkali metal cation, said zeolite being further characterized, after calcination at 600.degree. C, by exhibiting a sorption ratio of n-hexane/2-methylpentane of less than 10 at 90.degree. C.
A process for effecting transalkylation of an aromatic hydrocarbon charge selected from the group consisting of aromatic hydrocarbons and aromatic hydrocarbons containing a non-polar substituent which comprises contacting said hydrocarbon charge with a transalkylating agent under conditions effective for accomplishing said transalkylation including a reactor inlet temperature between about 650.degree. F and about 1100.degree. F, a reactor pressure between atmospheric and about 3000 psig, employing a mole ratio of hydrocarbon charge to transalkylating agent in the approximate range of 1:3 to 20:1 and a weight hourly space velocity between about 0.5 and 1000 in the presence of a catalyst comprising a crystalline aluminosilicate zeolite, or a product of heating said zeolite to a temperature of from about 500.degree. F to about 1500.degree. F, characterized by the X-ray diffraction pattern of Table 2 and a formula, expressed in terms of mole ratios of oxides in the anhydrous state, as follows:
- (0.3-2.5)R.sub.2 O:(0-0.8)M.sub.2 O:Al.sub.2 O.sub.3 :
- >
- 8SiO.sub.2
- wherein R is an organic nitrogen-containing cation derived from a 2-(hydroxyalkyl) trialkylammonium compound and M is an alkali metal cation, said zeolite being further characterized, after calcination at 600.degree. C, by exhibiting a sorption ratio of n-hexane/2-methylpentane of less than 10 at 90.degree. C.
Dependencies are inferred from the claim text.