Wax hydroisomerization process using two zeolite catalysts

Wax hydroisomerization process using two zeolite catalysts

Patent ratio = 3O:l to 70:1, ing agent. Preparation e.g., zeolite H-ZSM-5) treated with Mar. 5, 1996; Appl. a silylat- of caprolactone T. M...

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Patent ratio = 3O:l to 70:1, ing agent.

Preparation

e.g., zeolite

H-ZSM-5)

treated

with

Mar.

5, 1996;

Appl.

a silylat-

of caprolactone

T. Myauchi; Mitsubishi Jpn. Kokai 1994

H. Kurata Gas Chemical Tokkyo Koho

Caprolactone hydrogen halogenated CF,CHFCI).

is prepared by the reaction of cyclohexanone peroxide in the presence of a zeolite treated compound (e.g., zeolite H-ZSM-5 treated

Manufacture nium salts none

Co. 96,59,649,

of hydrogen peroxide of sulfonic acid-substituted

Aug.

29,

with with a with

from alkylammoanthrahydroqui-

CL. Rodriguez; J.G. Zajacek Arco Chemical Technology L. P. Eur. Pat. Appl. 709,339, May 1, 1996; U.S. Appl. Sept. 28, 1994 Alkylammonium salts of sulfonic acid-substituted anthrahydroquinone are reacted with molecular oxygen to form hydrogen peroxide, which is contacted with an ethylenically unsaturated substrate in the presence of a titanium silicalite catalyst to form an oxidation product, and the anthraquinone is hydrogenated to regenerate the anthrahydroquinone. The alkylammonium salts have the advantage of being highly soluble in polar protic media such as water and lower alcohols.

Wax hydroisomerization alysts

process

R.C. Dougherty; D.N. Mazzone Mobil Oil Corp. PCT Int. Appl. 96,07,715, Mar.

using

two

zeolite

cat-

Appl.

Sept.

8, 1994

Petroleum waxes are converted to high viscosity index lubricants by a synergistic process that employs two catalysts. The viscosity index and yield are greater for the product of the integrated double catalyst process than they are for the product of either of the catalysts alone. The wax feed, which may be pretreated by mild hydrocracking, is first subjected to isomerization in the presence of hydrogen over a low-acidity zeolite isomerization catalyst, which effects a preferential isomerization of the paraffin components in the feed to less waxy high viscosity index isoparaffins. The catalyst is preferably a noble metal containing zeolite-6 that contains boron as a framework component of the zeolite to give a low alpha value, typically below 20. The product of the isomerization process is then contacted with a shape-selective catalyst to reduce the pour point further. Preferably zeolite ZSM-22, ZSM-23, or ZSM-35 is used. The shape-selective catalyst preferably contains noble metals such as Pd or pt.

SEPARATION Adsorptive S. Kulprathipanja UOP Inc. U.S. 5,495,061,

PROCESSES

separation

of pxylene

R. Bertocchio

Improved

Feb.

27, 1996;

zeolite

Appl.

Oct.

11, 1994

of chlorofluoromethane-contaminated using zeolite 13X molecular

disieves

membrane

G.J. Bratton; K.D. Buck; N.T. De Villiers PCT Int. Appl. 96,09,110, Mar. 28, 1996; U.K. Pat. Appl. Sept. 20, 1994 A process for the treatment of zeolite membranes to improve their adsorption performance comprises contacting the membranes with a silicic acid or a mixture of silicic acids, preferably of composition Si,Q,(OH), where n, p, and r can vary from n = 1, p = 0, and r = 4, In the case of a monosilicic acid, through to n = 8-12, p = 12-20, and r = 8-12, in the case of medium molecular weight silicic acids, and through to n = 20-32, p = 36-60, and r = 8-20, in the case of higher molecular weight polymers.

Removal

of large

molecules

Q.H.G. Kuehl Mobil Oil Corp. PCT Int. Appl. 96,10,537,

Apr.

from

a fluid

11, 1996;

US.

Appl.

Oct.

3, 1994

A process for the removal of large molecules from waste or process streams uses an M41S material as an adsorbent, for example, zeolite MCM 41. The process is useful for the removal of trace amounts of polynuclear aromatics from complex hydrocarbon mixtures in the vapor phase, such as reformate.

of tetrafluoromethane

H. Oono; T. Nakajo; T. Ooi Showa Denko K.K. Jpn. Kokai Tokkyo Koho 96,81,399, Mar. 26, 1996; Appl. Sept. 8, 1994 Tetrafluoromethane containing trifluoromethane is purified by treating it with zeolite adsorbents having pore sizes of 3.5-l 1 A.

DETERGENTS Manufacture ing enzyme

of laundering

detergent

H. Tanimoto; H. Yamaboshi; T. Myahara Kao Corp. Jpn. Kokai Tokkyo Koho 96,41,491, Feb. 1994

granules

13, 1996;

contain-

Appl.

Aug.

2,

Laundry detergent granules containing enzyme, having good storage stability, solubility, and detergency, are manufactured in a dry pelletization process by extruding a crystalline aluminosilicate and enzyme mixture containing water-soluble organic binders. The detergent granules contain 5-80% of the aluminosilicate, which is uniformly dispersed.

Bleach bleach

The cost of separating pxylene from other xylene isomers and C, aromatics by adsorption on zeolitic molecular sieves is reduced by the use of certain relatively high boiling desorbents, including 1,4-diisopropylbenzene. Preferably the adsorbent is an X zeolite containing barium or both barium and potassium ions at exchangeable cationic sites. The pxylene components are selectively adsorbed onto the adsorbent. The nonadsorbed feed is then removed from the adsorbent, and the pxylene is recovered by desorption. Any C, aromatic hydrocarbons and the other xylene isomers in the raffinate can be separated from the desorbent by fractionation of the raffinate, and the desorbent can be recycled to the process.

Purification fluoromethane

E/f Atochem S.A. Eur. Pat. Appl. 703,206, Mar. 27, 1996; Fr. Appl. Sept. 26, 1994 Difluoromethane is freed from chlorofluoromethane contaminants by passing the unpurified gas over a zeolite 13X molecular sieve at 260°C. The spent zeolite 13X is regenerated by treatment with aqueous Na,CO, or K&O, solutions, followed by heating under an inert gas or under vacuum.

Purification 14, 1996;

report

compositions comprising catalysts and ammonium salts

metal-containing

R.T. Hartshorn; A.L. Main: G.M.A. Baillely Procter and Gamble Co. PCT Int. Appl. 96,06,155, Feb. 29, 1996; U.S. Appl. Aug. 24, 1994 Bleaching compositions useful for laundering fabrics use O.l30% ammonium salt to reduce bleach catalyst-induced fabric damage, for example, fading and strength reduction. A typical granular detergent contained C,2-,4 alkylsulfate 6 g, C2-,s alkyl ethoxylate 12 g, zeolite A 40 g, tetraacetyl ethylene diamine 4.5 g, ammonium acetate 5 g, and Mn catalyst 350 ppm.

Antioxidant-containing

detergent

powder

compositions

P.W. Appel; I.M. Clark; H. Euser et al. Unilever P/c.; Unilever N.V. PCT Int. Appl. 96,06,151, Feb. 29, 1996; U.K. Pat. Appl. 1994 A particulate detergent composition with improved contains >5% of a C8-20 primary alcohol sulfate and/or

Zeolites

18:301-305,

1997

Aug.

24,

stability 28% of

303