Gilsonite Usage

Gilsonite using as below application

1. Oil base drilling.

Oil based drilling fluids and advances in drilling fluid compositions are described in applicant’s co-pending application PCT CA2007/000646 filed April 18, 2007 and incorporated herein by reference. This co-pending application describes the chemistry of organoclays and primary emulsifiers for use in various applications including oil-based drilling fluids and various compositions wherein the viscosity of the compositions may be controlled.
By way of background and in the particular case of oil muds or oil-based drilling fluids, organophilic clays have been used in the past 50 years as a component of the drilling fluid to assist in creating drilling fluids having properties that enhance the drilling process. In particular, oil-based drilling fluids are used for cooling and lubrication, removal of cuttings and maintaining the well under pressure to control ingress of liquid and gas.
A typical oil-based drilling mud includes an oil component (the continuous phase), a water component (the dispersed phase) and an organophilic clay (hereinafter OC) which are mixed together to form a gel (also referred to as a drilling mud or oil mud). Emulsifiers, weight agents, fluid loss additives, salts and numerous other additives may be contained or dispersed into the mud. The ability of the drilling mud to maintain viscosity and emulsion stability generally determines the quality of the drilling mud.

2. Printing ink

ER resins are “engineered resins”; the term “ER resin” or “Gilsonite ER resin”, as used herein, means a purified fraction of uintaite. These fractions are substantially enriched in maltenes or asphaltenes relative to natural uintaite. Merely dissolving uintaite in a solvent in which it is soluble (i.e., a solvent that dissolves greater than about 90% of the uintaite) and filtering this solution does not produce a purified fraction of uintaite as defined herein. Such a simple filtration process does not substantially change the asphaltene to maltene ratio from that of natural uintaite.
Therefore it does not produce the asphaltene-enriched and maltene-enriched purified fraction of uintaite useful in this invention.
The term “maltene”, as used herein, refers to the fraction of uintaite that is dissolved when finely ground uintaite is contacted with 20 volumes of hot heptane at 80 solution is filtered through a 0.8 micron filter. Maltene-enriched fractions of uintaite, such as ER-140 and ER-115, have a weight ratio of maltenes to asphaltenes of greater than about 6; preferably greater than about 15; most preferably these resins are substantially free of asphaltenes, i.e., less than 2 wt. % asphaltenes. Moreover these resins are also substantially free of ash.
Maltene-enriched ER resins as defined herein have softening points below about 140 relative to natural uintaite; they have at least 50% fewer asphaltenes than natural uintaite, preferably at least 75% fewer, and more preferably at least 90% fewer. These maltene-enriched ER resins also have reduced mineral-derived insolubles, i.e., ash. These insolubles are below 0.1% by weight, preferably below 0.05%. The maltene-enriched fractions of uintaite useful in this invention comprise at least 60% maltenes, preferably at least 80% maltenes and most preferably at least 90% maltenes.
Maltene-enriched ER resins have lower softening points than those of natural uintaite. Solution viscosity, viscosity stability and melt viscosity are also substantially improved over available grades of natural uintaite. The less soluble, high melting, asphaltene-enriched fractions are also called ER resins.

3. Roofing felt

It may be well to preliminary discuss one of the ingredients which I employnamely, what is known as gilsonite or uintahite, a comparatively new hydrocarbon product, the nature of which is explained in an article by Locke, appearing in the Transactions of American Institute of Mining Engineers, Vol. 16, page 162. This article states, among other things, thatgilsonite possesses superior qualities as the principal ingredient in a roofing composition, and appreciating this fact I have in evolvingthe presentinvention aimed to produce a composition which will effectively utilize this substance. Used alon e gilsonitehas not proven satisfactory for roofing or paving purposes, being too brittle, and, moreover, not adapted for use as a base which can be tempered down to the proper consistency. I propose to combine gilsonite with asphaltum and a suitable oil in such a manner that the advantages of the gilsonite as an ingredient of a roofing composition can be had, the asphaltum supplying the deficiencies ap-‘ parent when the gilsonite is used alone, and I am thus’ enabled to procure a mixture that possesses elastic and pliable properties such. as desired in roofing-sheets and one which is at the same time durable andpossessed of the required commercial characteristics

4. Paint and coat

There are few prior art coating compositions which combine the highly desired characteristics of economy, low raw material cost and compatibility with most of the raw materials used in the paint, varnish and enamel in dustry, and at the same time are also highly resistant to acid and alkali materials, non-corrosive toward the surface upon which they are applied, weather-resistant and of high electrical insulating value. There is, however, one composition which possesses all of these properties. This composition is one containing gilsonite as a principal constituent. For example, a Gilsonite and drying oil composition possesses all of these desirable qualities to a considerable extent.
Gilsonite is one of the purest natural bituniens available and is used’in the manufacture of black varnishes, coach varnishes, black baking enamels, japaris, insulating compositions and water-proofing compositions. Two counties in the State of Utah are the sole source of commercial quantities of gilsonite in this country. Gilso’nite as mined in these counties varies in its properties from one deposit to another and its properties often vary. within a given deposit. In addition, many ofthe more accesssible deposits are being depleted. Consequently, theindustry is faced with the problem of providing a suitable replacement material for Gilsonite in such compositions.

5. Mix with asphalt

The use of bitumen (asphalt) compositions in preparing aggregate compositions (including, but not just limited to, bitumen and rock) useful as road paving material is complicated by at least three factors, each of which imposes a serious challenge to providing an acceptable product. First, the bitumen compositions must meet certain performance criteria or specifications in order to be considered useful for road paying.
For example, to ensure acceptable performance, state and federal agencies issue specifications for various bitumen applications including specifications for use as road pavement. Current Federal Highway Administration specifications require a bitumen (asphalt) product to meet defined parameters relating to properties such as viscosity, toughness, tenacity and ductility. Each of these parameters defines a critical feature of the bitumen composition, and compositions failing to meet one or more of these parameters will render that composition unacceptable for use as road pavement material. [0003] Conventional bitumen compositions frequently cannot meet all of the requirements of a particular specification simultaneously and, if these specifications are not met, damage to the resulting road can occur, including, but not necessarily limited to, permanent deformation, thermally induced cracking and flexural fatigue.
This damage greatly reduces the effective life of paved roads. [0004] In this regard, it has long been recognized that the properties of conventional bitumen compositions can be modified by the addition of other substances, such as polymers and asphaltites such as gilsonite. Gilsonite and other asphaltites are used as performance-enhancing agents forasphalt mixes.
Gilsonite-modified paving mixes achieve higher performance grades (PG) and incorporate into an asphalt blend with no need for high shear muling as in the case with some other modifiers. The use of SBS (styrene-butadiene- styrene) polymers may be partially or totally replaced by, or complemented bys the presence of gilsonite. Gilsonite-modified asphalts can have higher stability, reduced deformation, reduced temperature susceptibility and increased resistance to water stripping as compared to non-modified asphalts. A difficulty in using gilsonite as an asphalt modifier is that it is a solid, which is more difficultly handled and incorporated into a viscous bitumen.