US4975224A — Process for encapsulation of oily liquid waste ma…

Claim 1

Independent Claim 124 words

A process for encapsulating lipophilic liquid waste into a solid matrix for storage or disposal, comprising: (a) preparing a dispersion in said waste of a selected lipophilic polyfunctional reactant capable of forming a solid condensation polymer with a selected hydrophilic polyfunctional reactant by interfacial condensation; (b) mixing said dispersion with an aqueous solution of stabilizing agent, to form a uniform oil-in-water emulsion; (c) admixing said emulsion with an aqueous solution of said selected hydrophilic polyfunctional reactant, whereby a liquid suspension of waste-containing microcapsules is formed; (d) agitating said suspension with a curable water-extendible liquid resin to form a water-in-resin emulsion containing said microcapsules; and (e) adding a catalyst to said water-in-resin emulsion to cure said resin and form a solid matrix containing said microcapsules.

Claim 2

Dependent Claim 124 words

A process for encapsulating lipophilic liquid waste into a solid matrix for storage or disposal, comprising: (a) preparing a dispersion in said waste of a selected lipophilic polyfunctional reactant capable of forming a solid condensation polymer with a selected hydrophilic polyfunctional reactant by interfacial condensation; (b) mixing said dispersion with an aqueous solution of stabilizing agent, to form a uniform oil-in-water emulsion; (c) admixing said emulsion with an aqueous solution of said selected hydrophilic polyfunctional reactant, whereby a liquid suspension of waste-containing microcapsules is formed; (d) agitating said suspension with a curable water-extendible liquid resin to form a water-in-resin emulsion containing said microcapsules; and (e) adding a catalyst to said water-in-resin emulsion to cure said resin and form a solid matrix containing said microcapsules.

Claim 3

Dependent Claim 31 words

A process according to claim 1, wherein said curable, water-extendible liquid resin is an unsaturated polyester, a vinyl ester resin, or a mixture thereof, and said catalyst is a free-radical initiator.

Claim 4

Dependent Claim 23 words

A process according to claim 2, wherein said lipophilic polyfunctional reactant is a polyacid chloride and said hydrophilic polyfunctional reactant is a polyamine.

Claim 5

Dependent Claim 15 words

A process according to claim 3, wherein said lipophilic liquid waste is a lubricating oil.

Claim 6

Dependent Claim 123 words

A process for preparing a solid wasteform containing immobilized waste oil, for disposal, comprising the steps of: (a) dispersing in the oil to be disposed of a first reagent comprising at least one acid chloride from the group consisting of terephthaloyl chloride and sebacoyl chloride; (b) emulsifying the oil dispersion produced in step (a) in water containing a stabilizing agent to form droplets; (c) mixing the emulsion produced by step (b) with an aqueous solution of a second reagent comprising a difunctional amine, to produce an aqueous suspension of encapsulated waste oil by interfacial condensation; (d) mixing said aqueous suspension of encapsulated waste oil with a curable, water-extendible polyester resin; and (e) curing the mixture produced by step (d) to a solid wasteform.

Claim 7

Dependent Claim 123 words

A process for preparing a solid wasteform containing immobilized waste oil, for disposal, comprising the steps of: (a) dispersing in the oil to be disposed of a first reagent comprising at least one acid chloride from the group consisting of terephthaloyl chloride and sebacoyl chloride; (b) emulsifying the oil dispersion produced in step (a) in water containing a stabilizing agent to form droplets; (c) mixing the emulsion produced by step (b) with an aqueous solution of a second reagent comprising a difunctional amine, to produce an aqueous suspension of encapsulated waste oil by interfacial condensation; (d) mixing said aqueous suspension of encapsulated waste oil with a curable, water-extendible polyester resin; and (e) curing the mixture produced by step (d) to a solid wasteform.

Claim 8

Dependent Claim 30 words

A process according to claim 5, wherein the ratio of amine functional groups from said second reagent to acid chloride functional groups from said first reagent is less than 1:1.

Claim 9

Dependent Claim 14 words

A process according to claim 5, wherein said first reagent further comprises trimesoyl chloride.

Claim 10

Dependent Claim 12 words

A process according to claim 7, wherein said second reagent is 1,6-hexanediamine.

Claim 11

Dependent Claim 16 words

A process according to claim 5, wherein said curable, water-extendible polyester resin is AROPOL WEP 661-P.*

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1993-12-03	1994-06-04	1994-12-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1997-12-03	1998-06-04	1998-12-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2001-12-03	2002-06-04	2002-12-04	$7700.00	Window Closed / Lapsed

Process for encapsulation of oily liquid waste materials

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