Preventive tool and method thereof

 

(57) Abstract:

Use: to help prevent sticking and primerzanie materials at low negative temperatures in construction, mining, metallurgical, coal and other industries. Prophylactic with anticorrosive effect contains liquid oil sludge with a nominal viscosity at 50C not more than 1.50 and a liquid product of the pyrolysis of solid fuels with a nominal viscosity at 50C not more than 1.30 with corrosion inhibitor with hexamethylenetetramine. The product contains (in wt.%) 85-90 oil sludge, 10-15 liquid products of pyrolysis of solid fuels and hexamethylenetetramine - not more than 0.1. Prophylactic prepared in one stage by mixing at a temperature not exceeding 180C With subsequent isothermal aging. The technical result is the enhancement of technological and operational properties of preventative measures, reducing the cost of the product due to improper use of the products and the change in production technology. 2 S. p. f-crystals, 1 table.

The invention relates to new methods of prevention, which can be used to help prevent sticking and Presh industry in conditions of low negative temperatures.

Known prophylactic agent to prevent sticking and primerzanie materials using tar and low-molecular-weight polyethylene dissolved in kerosene, gas oil fractions of secondary processes (patent RF N 2132350, CL 09 3/18, publ. 27.06.1999).

The disadvantages of the known preventive means may include the use of the target product is a low molecular weight polyethylene.

Get known prophylactic agent in two stages. In the first stage serves 0.8-2.0% solution of low molecular weight polyethylene heated to 80-90oC kerosene, gas oil fractions of secondary processes of thermal cracking with limits boiling 195-270oC. In the second stage mix estimated quantities of this solution with tar subsequent stirring of the mixture for 5-10 minutes at a temperature of 80-90oC and isothermal aging within 30-90 minutes

The disadvantages of the method to obtain preventive means may include the additional step process due to the need for prior preparation of a solution of low molecular weight polyethylene in kerosene-gas oil fraction.

Known preventive remedy for significant others is of esov thermal cracking (RF patent N 2111228, CL 09 3/22, publ. 20.05.1998).

Known prophylactic receive in a single stage without the use of the target product is a low molecular weight polyethylene by mixing calculated amounts of tar and kerosene-gas oil fraction secondary processes within the boiling 195-270oC under stirring for 5-10 min at 80-90oC and isothermal exposure for 60-90 min at the same temperature.

The disadvantages of the known preventive means and methods for their preparation include the following.

First, the stratification in connection with the use of products with sharply different values of the temperature of solidification (for the first component - kerosene-gas oil fraction -45oC, and for the second component - tar +20oC) and sharply different values of the viscosity (at 50oC: for kerosene-gas oil fraction is not more than 1.33, and for tar - 45). Therefore, these preventive tools stratified during storage, transport, use, and maintenance, resulting in lower quality prevention with their application, especially at low temperatures.

Secondly, kerosene, gas oil fractions are used for production is but their resources are limited.

Thirdly, when using kerosene, gas oil fractions and tars derived from sulfur crudes, these products do not protect against corrosion surfaces of transportation equipment. Therefore, the separator film prophylactic agent in this case is not effective because of loose corrosion products absorb known preventive measure.

Closest to the proposed invention is a prophylactic agent containing kerosene and autoconstraint thresholds Movil applied for corrosion protection of parts and cars, and how to obtain it (and.with. USSR N 1414855, CL 09 3/18, publ. 07.08.1988).

Receive prophylactic agent by simple mixing of kerosene (K) and autokonservado Movil (AK).

The disadvantages of this method include the use as a core component of kerosene (K) is the target product of the refining of limited resources and produces anti-corrosive component autokonservado Movil (AK).

Kerosene (K) used for the production of polymeric materials, for example, for the production of PVC, rubber sheet, races the sideboard Movil (AK), you must have 6 target ingredients: ceresin, petroleum butter, VAT residue rectification of cyclohexanone, alkylenediamines and phenol-formaldehyde resin and organic solvent, which significantly complicates its manufacture, and, as a consequence, the production of known preventive measure.

An object of the invention is the enhancement of technological and operational properties of prophylactic agents to prevent sticking and primerzanie and cost reduction through the use of inappropriate products and changes in production technology.

The problem is solved prophylactic agent-based product of oil refining and anti-corrosive component, in which the quality of the product refining use liquid oil sludge (NSH) with a nominal viscosity at 50oC not more than 1.50, and as an anticorrosive component - product of the pyrolysis of solid fuels (PP) with a nominal viscosity at 50oC not more than 1.30 and corrosion inhibitor hexamethylenetetramine (it has been) at a ratio of, respectively, wt.%: 85-90: 10-15: not more than 0.1.

In the present invention use liquid oil sludge with a nominal viscosity at 50oC not more than 1.50 - waste n the 20oC not more than 0.88, with a pour point not higher than - 45oC, similar to the azeotropic mixture of aliphatic, naphthenic and aromatic compounds liquid product of the pyrolysis of solid fuels.

In the present invention as anti-corrosive component instead of multicomponent autokonservado Movil (AK) use component-based liquid product of the pyrolysis of solid fuels (PP) and corrosion inhibitor - hexamethylenetetramine (it has been).

In the proposed preventive tool use liquid product of the pyrolysis of solid fuels with a nominal viscosity at 50oC not more than 1.30 - waste, is not found qualified industrial use. The liquid product of pyrolysis is an azeotropic mixture with density at 20oC not more than 1.06 and a pour point not higher than - 10oC the following composition, wt.%:

Paraffin-olefin compounds 12-14

Monocyclic aromatic compounds - 5-8

Polycyclic aromatic compounds - 30 - 40

Neutral oxygen compounds - 40-50

Carboxylic acid - 1-2

all these compounds stably distributed in the azeotropic mixture Allam refining and liquid pyrolysis product is used in the ratio of the components, respectively, wt.%: 85-90: 10-15.

When the number of liquid petroleum sludge is reduced anti-corrosive effect and its reduction leads to an increase of the temperature of solidification preventive measure.

The liquid product of the pyrolysis of solid fuels interacts with hexamethylenetetramine added in quantities of not more than 0.1 wt.%.

The increase of its concentration more than 0.1 wt.% impractical because does not improve the prophylactic properties.

When the interaction of the liquid product of the pyrolysis of solid fuels with hexamethylenetetramine, which is the donor and methylene amine groups are formed oligomers of type alkylphthalimide and alkylphenolic resins, which causes corrosion preventive properties of the tool.

Close values of viscosity and pour point, the similarity of the chemical composition of components used for liquid petroleum sludge and liquid pyrolysis product, provide pressline ready prophylactic means that, as a consequence, increases its technological and operational properties.

The use of utilisable products nizamlamaga funds by mixing at a temperature not exceeding 180oC and subsequent isothermal soaking liquid oil sludge with a nominal viscosity at 50oC not more than 1.50 and anti-corrosive component is a liquid product of the pyrolysis of solid fuels with a nominal viscosity at 50oC not more than 1.30 and corrosion inhibitor of hexamethylenetetramine in the following ratio, respectively, wt.%: 85-90:10-15: not more than 0.1.

Prophylactic receive in a single phase by mixing all three components at the process temperature of not more than 180oC, because at higher temperatures the decomposition. Time isothermal exposure is determined by the cessation of gassing.

The process in one stage using natural multicomponent mixtures instead of the artificial preparation of this mixture, as autoconstraint Movil, greatly simplifies the process without reducing the utilitarian properties of the proposed drug.

Example. In a reactor equipped with a stirrer and a steam-jacketed load 89.9 kg of liquid oil sludge (NSH) with density 0.8750 at 20oC and conditional viscosity of 1.45 with under 50oC. At 100 2oC and atmospheric pressure are introduced with stirring 10 kg Zhidkov 0.1 kg of hexamethylenetetramine (it has been). Then for 30 min with stirring to give isothermal aging at 100 2oC.

Sticking and freezing define as well as well-known preventive means.with. USSR N 1414855, CL 09 3/18, publ. 07. 08. 1988). The results are given in the table. As can be seen from the table, when the content of the corrosion inhibitor it has been in the amount of 0.1 wt.% and the ratio NSH:PP, respectively, wt.%, 89.90:10.00, sticking and freezing significantly reduced. The achieved effect is higher than the introduction of 10 times more autokonservado Movil (AK) and the use of kerosene (K) is the target product of limited resources.

New prophylactic agent can be used at low temperatures in various industries to help prevent sticking and primerzanie, in particular, for processing the working surfaces of vehicles for transportation of bulk cargo: sand, coal, iron ore concentrate, crushed rock and other bulk materials, for loading and unloading which currently require significant additional time and energy costs in connection with the freezing BP> 1. Prophylactic with anticorrosive effect to help prevent sticking and primerzanie materials, containing petroleum products and anti-corrosive component, characterized in that the quality of the product refining use liquid oil sludge with a nominal viscosity at 50C not more than 1.50, and as an anticorrosive component is a liquid product of the pyrolysis of solid fuels with a nominal viscosity at 50C not more than 1.30 on with and corrosion inhibitor - hexamethylenetetramine in the following ratio, wt.%:

Oil sludge - 85 - 90

The liquid product of the pyrolysis of solid fuels - 10 - 15

Hexamethylenetetramine is Not more than 0.1

2. A method of obtaining a prophylactic agent-based petrochemicals and anti-corrosive component by mixing, characterized in that the mixing is carried out at a temperature not exceeding 180C With subsequent isothermal aging, the quality of the product refining use liquid oil sludge with a nominal viscosity at 50C not more than 1.50, and as an anticorrosive component is a liquid product of the pyrolysis of solid fuels with a nominal viscosity at 50C not more than 1.30 on with and inhibit pyrolysis of solid fuels - 10 - 15

Hexamethylenetetramine is Not more than 0.1.

 

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6 cl, 2 tbl, 4 ex

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