US4629588A — Method for refining glyceride oils using amorphou…

Claim 1

Independent Claim 116 words

A process for the removal of trace contaminants, which are phospholipids and associated metal ions, from glyceride oils by adsorbing said trace contaminants onto amorphous silica to yield glyceride oils having 15.0 ppm or less of phosphorus present as phospholipids, comprising: (a) selecting a glyceride oil with a phosphorus content in excess of about 1.0 ppm, (b) selecting an adsorbent consisting of an amorphous silica which has an effective average pore diameter of greater than 60 Angstroms, (c) contacting the glyceride oil of step (a) and the adsorbent of step (b), (d) allowing said trace contaminants to be adsorbed onto said adsorbent, and (e) separating the resulting phospholipid- and metal ion-depleted glyceride oil from the adsorbent.

Claim 2

Dependent Claim 116 words

A process for the removal of trace contaminants, which are phospholipids and associated metal ions, from glyceride oils by adsorbing said trace contaminants onto amorphous silica to yield glyceride oils having 15.0 ppm or less of phosphorus present as phospholipids, comprising: (a) selecting a glyceride oil with a phosphorus content in excess of about 1.0 ppm, (b) selecting an adsorbent consisting of an amorphous silica which has an effective average pore diameter of greater than 60 Angstroms, (c) contacting the glyceride oil of step (a) and the adsorbent of step (b), (d) allowing said trace contaminants to be adsorbed onto said adsorbent, and (e) separating the resulting phospholipid- and metal ion-depleted glyceride oil from the adsorbent.

Claim 3

Dependent Claim 23 words

The process of claim 1 in which said glyceride oil is degummed oil comprising about up to about 200 parts per million phosphorus.

Claim 4

Dependent Claim 13 words

The process of claim 1 in which said glyceride oil is soybean oil.

Claim 5

Dependent Claim 18 words

The process of claim 1 in which said average pore diameter is between 60 and about 5000 Angstroms.

Claim 6

Dependent Claim 29 words

The process of claim 1 in which at least 50% of the pore volume of said amorphous silica is contained in pores of at least 60 Angstroms in diameter.

Claim 7

Dependent Claim 33 words

The process of claim 1 in which said amorphous silica is utilized in such a manner as to create an artificial pore network of interparticle voids having diameters of greater than 60 Angstroms.

Claim 8

Dependent Claim 13 words

The process of claim 6 in which said amorphous silica is fumed silica.

Claim 9

Dependent Claim 26 words

The process of claim 1 in which said amorphous silica is selected from the group consisting of silica gels, precipitated silicas, dialytic silicas, and fumed silicas.

Claim 10

Dependent Claim 13 words

The process of claim 8 in which said silica gel is a hydrogel.

Claim 11

Dependent Claim 20 words

The process of claim 8 in which the water content of said amorphous silica is greater than 30% by weight.

Claim 12

Dependent Claim 23 words

The process of claim 1 in which said amorphous silica has a surface area of up to about 1200 square meters per gram.

Claim 13

Dependent Claim 16 words

The process of claim 1 in which said amorphous silica comprises minor amounts of inorganic constituents.

Claim 14

Dependent Claim 47 words

An improved process for the refining of glyceride oil, which process comprises the steps of degumming, phospholipid removal, bleaching and deodorizing, the improvement comprising removing phospholipids by contacting said glyceride oil with amorphous silica having an effective average pore diameter of about 60 to about 5000 Angstroms.

Claim 15

Dependent Claim 47 words

An improved process for the refining of glyceride oil, which process comprises the steps of degumming, phospholipid removal, bleaching and deodorizing, the improvement comprising removing phospholipids by contacting said glyceride oil with amorphous silica having an effective average pore diameter of about 60 to about 5000 Angstroms.

Claim 16

Dependent Claim 14 words

The improved process of claim 13 in which said glyceride oil is soybean oil.

Claim 17

Dependent Claim 30 words

The improved process of claim 13 in which at least 50% of the pore volume of said amorphous silica is contained in pores of at least 60 Angstroms in diameter.

Claim 18

Dependent Claim 27 words

The improved process of claim 13 in which said amorphous silica is selected from the group consisting of silica gels, precipitated silicas, dialytic silicas and fumed silicas.

Claim 19

Dependent Claim 20 words

The improved process of claim 13 which the water content of said amorphous silica is greater than 30% by weight.

Claim 20

Dependent Claim 47 words

A sequential treatment process for decreasing the phospholipid content of and decolorizing glyceride oils, comprising first treating said glyceride oil by contacting with amorphous silica having an effective average pore diameter of about 60 to 5000 Angstroms and next treating the phospholipid-depleted glyceride oil with bleaching earth.

Claim 21

Dependent Claim 47 words

A sequential treatment process for decreasing the phospholipid content of and decolorizing glyceride oils, comprising first treating said glyceride oil by contacting with amorphous silica having an effective average pore diameter of about 60 to 5000 Angstroms and next treating the phospholipid-depleted glyceride oil with bleaching earth.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1989-12-15	1990-06-16	1990-12-16	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1993-12-15	1994-06-16	1994-12-16	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1997-12-15	1998-06-16	1998-12-16	$7700.00	Window Closed / Lapsed

Method for refining glyceride oils using amorphous silica

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