Mercapto-triazole gas pipeline drag reducer and preparation method thereof

A technology of mercaptotriazoles and gas pipelines, applied in pipeline systems, chemical instruments and methods, gas fuels, etc., can solve problems such as limited drag reduction effects, achieve low equipment requirements, obvious drag reduction effects, and realize large-scale The effect of industrial production

Inactive Publication Date: 2015-05-20
PETROCHINA CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although this patent proposes a drag reduction method and some drag reducer substances in the gas pipeline, the drag reduction effect of these substances is limited, and they are not ideal drag reducers.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1. This example is a test method in a laboratory. Specifically, measure 100g of carbon disulfide, drop it into a mixture of 25g of hydrazine hydrate and 50g of ethanol under stirring, reflux at 100°C for 8h, then cool in an ice-water bath for 4h, and filter with suction, and add the filtered product to the solution of 2-chloroethanol In ethanol solution, react at room temperature for 24 hours, reflux at 100°C for 12 hours, adjust the pH to 5 with dilute hydrochloric acid, filter and dry with suction, recrystallize from absolute ethanol to obtain 197g of 1,3-dithiosemicarbazide. Dissolve 1,3-dithiosemicarbazide in glacial acetic acid solvent, heat up to make it boil, add 200g of aromatic aldehyde, heat and keep boiling for 8 hours, cool to room temperature, wash the filtered product with absolute ethanol 5 times, vacuum Dry to obtain 311g of bisthiosemicarbazone. Dissolve bisthiosemicarbazide in toluene or xylene solution containing 300g of aromatic ester, sti...

Embodiment 2

[0028] Embodiment 2. This example is a test method in a laboratory. Specifically, measure 100g of carbon disulfide, drop it into a mixture of 30g of hydrazine hydrate and 60g of ethanol under stirring, reflux at 100°C for 7h, then cool in an ice-water bath for 2h, and filter with suction, and add the filtered product to the solution of 2-chloroethanol In ethanol solution, react at room temperature for 24 hours, reflux at 100°C for 11 hours, adjust the pH to 3 with dilute hydrochloric acid, filter and dry with suction, recrystallize from absolute ethanol to obtain 213g of 1,3-dithiosemicarbazide. Dissolve 1,3-dithiosemicarbazide in glacial acetic acid solvent, heat up to make it boil, add 220g of aromatic aldehyde, heat and keep boiling for 8 hours, cool to room temperature, wash the filtered product with absolute ethanol three times, vacuum Dry to obtain 342g of bisthiosemicarbazone. Dissolve bisthiosemicarbazide in toluene or xylene solution containing 350g of aromatic ester,...

Embodiment 3

[0029]Embodiment 3. This example is a test method in a laboratory. Specifically, measure 100g of carbon disulfide, drop it into a mixture of 28g of hydrazine hydrate and 55g of ethanol under stirring, reflux at 100°C for 8h, then cool in an ice-water bath for 3h, and filter with suction, add the product of the suction filtration to the solution of 2-chloroethanol In ethanol solution, react at room temperature for 20 hours, reflux at 100°C for 12 hours, adjust the pH to 4 with dilute hydrochloric acid, filter and dry with suction, recrystallize from absolute ethanol to obtain 204 g of 1,3-dithiosemicarbazide. Dissolve 1,3-dithiosemicarbazide in glacial acetic acid solvent, heat up to make it boil, add 200g of aromatic aldehyde, heat and keep boiling for 8 hours, cool to room temperature, wash the filtered product with absolute ethanol 5 times, vacuum Dry to obtain 319g of bisthiosemicarbazone. Dissolve bisthiosemicarbazone in toluene or xylene solution containing 320g of aromat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

Provided are a mercaptotriazole drag reducer for a transmission pipeline and a preparation method therefor. The mercaptotriazole drag reducer for a transmission pipeline is prepared by the following steps: producing 1,3-diaminothiourea from hydrazine hydrate and carbon disulfide at a mass ratio of 3:1-4:1 under the action of a catalyst I, performing a condensation reaction from 1,3-diaminothiourea and an aromatic aldehyde at a mass ratio of 1:1-1:1.5 to produce bis (thiosemicarbazone), and producing a mercaptotriazole compound from the bis (thiosemicarbazone) and an aromatic ester at a mass ratio of 1:1-1:3 under the action of a catalyst II, dissolving the mercaptotriazole compound in acetone, adding a phosphoric acid or phosphate therein, and fully mixing same to obtain the targeted product. The present invention has a direct raw material source, a simple operation, mild reaction conditions, and can be injected on-line by atomization.

Description

technical field [0001] The invention relates to a drag reducing agent for gas pipelines, especially a class of mercaptotriazole gas pipeline drag reducing agent for drag reduction of long-distance natural gas pipelines and a preparation method thereof. Involves general methods of organic chemistry, organic macromolecular compounds and pipeline system technology. Background technique [0002] The utilization of natural gas energy is one of the important development directions at home and abroad. Due to the global requirements for sustainable economic development and the call for "clean energy", the demand for natural gas is increasing day by day. [0003] At present, the main transportation mode of natural gas is pipeline transportation. Gas pipelines in the modern sense have a history of nearly 120 years. As the gas flows through the pipe, the roughness causes friction which in turn creates a gas vortex, causing energy loss and thus pressure loss in the pipe. For natural...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/00C08K3/32C08G73/00C07D249/12F17D1/02C09D7/80
CPCC07D249/12C08G73/00C08K3/32F17D1/02C08L79/00C07D249/04C08K5/378C09D7/80C08K2003/329C09K3/00C10L3/003C10L2230/14C10L2270/10
Inventor 李国平张志恒艾慕阳刘广文常维纯郭海峰徐海红刘诚李绍玉
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap