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US 2019/0100685 A1Published application
Paraffin inhibition by solubilized calixarenes
AssigneeSi Group, Inc.
InventorRobert CABLE
Life of this patent
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Abstract
This invention relates to compositions and a process for stabilizing or improving the solubility of a phenolic resin containing a mixture of linear phenolic resins and calixarenes in a hydrocarbon solvent. This invention also relates to a paraffin-containing fluid composition comprising this stabilized (solubilized) calixarene resin. The invention also relates to methods for dispersing paraffin crystals, inhibiting paraffin crystal deposition, or treating a well or vessel to reduce the deposition of paraffin crystals, with a resin composition containing this stabilized (solubilized) calixarene resin.
Claims25
A method for dispersing paraffin crystals or inhibiting paraffin crystal deposition in a paraffin-containing fluid, comprising:
- adding to a paraffin-containing fluid, an effective amount of a resin at least partially soluble in the paraffin-containing fluid, wherein the resin comprises one or more modified calixarene compounds, each modified calixarene compound comprising 4-20 units of formula (I′) and/or formula (II):
- wherein:
- each X is independently the same or different moiety, each moiety having a structure of
- each R1 is independently a H, C1 to C30 alkyl, phenyl, or arylalkyl;
- each R2 is independently a H, C1 to C20 branched or unbranched alkyl which may optionally be substituted with one or more glycidyl ether units of the formula
- C2 to C10 alkenyl, or C5 to C10 aryl;
- each L is independently selected from the group consisting of —CH2—, —C(O)—, —CH(R3)—, —(CH2)n—O—(CH2)n—, —C(R3)2—, and —S—;
- each R3 is independently a C1-C6 alkyl;
- each m is independently an integer from 0 to 10;
- each n is independently an integer from 1 to 2;
- each q is independently an integer from 1 to 100;
- each A1 represents a direct covalent bond to an adjacent unit of formula (I′) or formula (II) such that there is one L group between adjacent units, whereby the total units in the calixarene compound form a ring;
- and
- wherein units of formula (I′) make up from about 35% to 100% of the overall units present in the calixarene compound,
- wherein the resin disperses the paraffin in the paraffin-containing fluid and/or inhibits the deposition of the paraffin crystals.
12 more elements
A method for treating a well or vessel surface to reduce the deposition of paraffin crystals on the well or vessel surface, comprising:
- treating the well or vessel surface with a resin composition comprising an effective amount of a resin comprising one or more modified calixarene compounds, each modified calixarene compound comprising 4-20 units of formula (I′) and/or formula (II):
- wherein:
- each X is independently the same or different moiety, each moiety having a structure of
- each R1 is independently a H, C1 to C30 alkyl, phenyl, or arylalkyl;
- each R2 is independently a H, C1 to C20 branched or unbranched alkyl which may optionally be substituted with one or more glycidyl ether units of the formula
- C2 to C10 alkenyl, or C5 to C10 aryl;
- each L is independently selected from the group consisting of —CH2—, —C(O)—, —CH(R3)—, —(CH2)n—O—(CH2)n—, —C(R3)2—, and —S—;
- each R3 is independently a C1-C6 alkyl;
- each m is independently an integer from 0 to 10;
- each n is independently an integer from 1 to 2;
- each q is independently an integer from 1 to 100;
- each A1 represents a direct covalent bond to an adjacent unit of formula (I′) or formula (II) such that there is one L group between adjacent units, whereby the total units in the calixarene compound form a ring;
- and
- wherein units of formula (I′) make up from about 35% to 100% of the overall units present in the calixarene compound,
- wherein the treatment reduces the deposition of paraffin crystals on the well or vessel surface.
12 more elements
A paraffin-containing fluid composition comprising:
- a) a paraffin-containing fluid;
- and
- b) a resin at least partially soluble in the paraffin-containing fluid, for dispersing the paraffin in the fluid composition and/or inhibiting the deposition of the paraffin crystals, the resin comprising one or more modified calixarene compounds, each modified calixarene compound comprising 4-20 units of formula (I′) and/or formula (II):
- wherein:
- each X is independently the same or different moiety, each moiety having a structure of
- each R1 is independently a H, C1 to C30 alkyl, phenyl, or arylalkyl;
- each R2 is independently a H, C1 to C20 branched or unbranched alkyl which may optionally be substituted with one or more glycidyl ether units of the formula
- C2 to C10 alkenyl, or C5 to C10 aryl;
- each L is independently selected from the group consisting of —CH2—, —C(O)—, —CH(R3)—, —(CH2)n—O—(CH2)n—, —C(R3)2—, and —S—;
- each R3 is independently a C1-C6 alkyl;
- each m is independently an integer from 0 to 10;
- each n is independently an integer from 1 to 2;
- each q is independently an integer from 1 to 100;
- each A1 represents a direct covalent bond to an adjacent unit of formula (I′) or formula (II) such that there is one L group between adjacent units, whereby the total units in the calixarene compound form a ring;
- and
- wherein units of formula (I′) make up from about 35% to 100% of the overall units present in the calixarene compound.
13 more elements
Dependencies are inferred from the claim text.