RU2225568C1 - Method of condensed material preparation for transportation thereof - Google Patents

Abstract

FIELD: solid and high-viscous material transportation. SUBSTANCE: method for material preparation involves forming low-melting liquid mixtures by solvents and separating mixture into initial components by usage of well-known techniques. Substances forming eutectic mixture together with transportable material with ratio close to that of liquid mixture are used as solvents. EFFECT: increased economy during material transportation. 2 ex

Description

 The invention relates to the transport of condensed (solid and highly viscous liquid) substances and can be used in preparing them for transportation by the formation of low melting liquid mixtures.

 To improve the transportation of highly viscous substances at low temperatures, solvents are introduced into them - solvents that lower their melting point.

 A known method of hydrotransport in pipelines of high viscosity oils, which consists in pretreating part of the oil with ozone, followed by dispersion of ozonized oil in a stream of water with a slightly alkaline reaction (Method of pipeline transport of high viscosity oils. Pat. 2105923 Ru, F 17 D 1/16 / Emkov A.A. , Gumerov A.G., Karamyshev V.G. Application 95108636/06, application.26.05.95, publ. 02.27.98).

 The disadvantage of this method is the need for ozone production.

 A known method of lowering the pour point of high-paraffin oils is that the pour point of high-paraffin oils is reduced by introducing water as a depressant (Method for reducing the pour point of high-paraffin oils. Pat. 2042876 Ru, F 17 D 1/16 / Uskov N. N., Ostashchenko B.A., Bezgachev E.L., Pobery A.Yu. Application 5036662/04, application 08.04.92, publ. 08.27.95).

 The disadvantage of this method is a slight decrease in the pour point of the mixture.

 The present invention provides a new method for preparing for transporting condensed materials with a high pour point.

 The technical result of the invention is the efficiency of transportation of substances.

 The technical result is achieved in that a decrease in the crystallization (melting) temperature of the transported substance is carried out by introducing solvents, which are substances that form a eutectic mixture with the transported substance in a ratio close in composition to this mixture. The solvents are water, alcohol, acetone and other known solvents, and further separation of the mixture into the starting components is carried out by known methods.

 The novelty of the proposed method compared to the known ones consists in the formation of a transported substance with a specially selected solvent of a eutectic or near-eutectic mixture having a low melting point.

 Examples of the method.

 Example 1 specific performance.

1. A transported liquid substance, for example diethylene glycol, having a melting point of -7.2 ^° C, is dissolved in water to form a eutectic (melting point -68 ^° C, water content of 31 wt.%, Diethylene glycol content of 69 wt.%) Or a near-eutectic composition .

2. The eutectic mixture is loaded into tanks for transportation or transported through pipelines at low temperatures up to -68 ^o C.

 3. At the place of receipt (consumption) of the substance, the transported substance and the solvent are separated by known methods - distillation, extraction, etc.

 Example 2 specific performance.

1. The transported solid, for example phosphoric acid, having a melting point of 42 ^{° C.} , is dissolved in water to form a eutectic composition (melting point -85 ^{° C.} , water content of 37.5 wt.%, Phosphoric acid content of 62.5 wt.% )

2. The eutectic mixture is loaded into containers or transported through pipelines at temperatures up to -80 ^o C.

 3. At the place of receipt (consumption), water is distilled off to obtain solid phosphoric acid.

 In a similar way, mixtures of two or more substances can be transported.

The claimed method of transportation has significant advantages compared with the known:
1. Allows you to transport and carry out loading and unloading operations with the necessary substances in a liquid state at low temperatures.

 2. Allows you to prevent changing the volume of the transported mixture of substances at temperatures until they crystallize (melting).

 3. Allows you to use pipelines to transport substances, that is, to carry out the process continuously.

 As a solvent, water, alcohol, acetone and other solvents may be used; inorganic and organic substances and their mixtures can be used as dissolved.

Claims (1)

A method of preparing for transportation of condensed substances, including reducing the crystallization (melting) temperature of the transported substance by introducing solvents, characterized in that the solvents used are substances that form a eutectic mixture with the transported substance in a ratio similar in composition to this mixture, and further separation of the mixture the starting components are carried out by known methods.