Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A composite coal water slurry additive and its preparation process

A preparation process, technology of coal water slurry, applied in fuel additives, petroleum industry, liquid carbon-containing fuel, etc., can solve problems such as increased concentration of coal water slurry, poor slurry stability, easy to produce hard deposits, etc., to save heat energy , Improve product performance, shorten the effect of preparation time

Active Publication Date: 2020-08-28
邱慕涛
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the most widely used product in the market is naphthalenesulfonate condensate with various substituents, which is characterized by good dispersibility, strong viscosity reduction effect, good slurry fluidity, wide application range and compatibility with various dispersants Used in combination, but the stability of the slurry is poor and hard precipitation is easy to occur
Currently commercially available coal water slurry additives are mainly composed of naphthalene sulfonate condensate and sodium lignosulfonate in proportion, and a large amount of lignosulfonate and naphthalene sulfonate condensate are added in the preparation process sulfuric acid, resulting in high sulfate concentration in additives, resulting in increased concentration of coal water slurry, decreased stability and other issues

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A composite coal water slurry additive and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The preparation process of the present invention is as follows:

[0022] (1) Preparation of acid regulator: first place naphthalene and its homologues in a sulfonation reactor, heat up to 135~145°C, add concentrated sulfuric acid, and perform sulfonation reaction at 155~160°C for 2~3 h; Transfer to the hydrolysis and condensation reaction kettle, lower the temperature to 120~125 °C, and then pass in water at 70~90 °C for 0.5~1.0 h of hydrolysis reaction, slowly add formaldehyde, and condense at 100~105 °C for 4~5 hours, Add water to dilute to a solid content of 30.0% to obtain an acidic regulator.

[0023] (2) Preparation of composite coal water slurry additive: first put the pulping black liquor into a reaction kettle with good thermal insulation performance, add 150°C saturated steam to raise the temperature of the reaction system to 50~60°C, and then add step (1) Prepared acid regulator, adjust the pH to 10.5~11.5, then add hydrogen peroxide, and oxidize for 20~30 m...

Embodiment 1

[0032] 1. The raw material components used in this embodiment are as follows (unit: kilogram):

[0033] Methyl naphthalene: 77 kg

[0034] Concentrated sulfuric acid (98%): 66 kg

[0035] Formaldehyde (37%): 56 kg

[0036] Masson pine caustic soda pulping black liquor (solid content 50%): 310 kg

[0037] Saturated water vapor at 150°C: 77kg

[0038] Hydrogen peroxide (30%): 6 kg

[0039] Sodium sulfite: 23 kg

[0040] Water: 385 kg

[0041] 2. Preparation process steps and parameters:

[0042] (1) Preparation of acid regulator: first place 77 kg of methylnaphthalene in a sulfonation reactor, heat up to 135°C, add 66 kg of concentrated sulfuric acid with a content of 98%, and sulfonate at 155°C for 3.0 h; Transfer the reaction materials to the hydrolysis and condensation tank, lower the temperature to 120 °C, and then pass 15 kg of hot water at a temperature of 90 °C to carry out the hydrolysis reaction for 0.5 h, then slowly add 44 kg of formaldehyde solution with a sol...

Embodiment 2

[0045] 1. The raw material components used in this embodiment are as follows (unit: kilogram):

[0046] Naphthalene and its homologues (a mixture of naphthalene and methylnaphthalene, the mass ratio is 1:1): 76 kg

[0047] Concentrated sulfuric acid (98%): 70 kg

[0048] Formaldehyde (37%): 54 kg

[0049] Soda pulping black liquor (mixture of poplar and eucalyptus, mass ratio 1:3, solid content: 45%): 322 kg

[0050] Saturated water vapor at 150°C: 80kg

[0051] Hydrogen peroxide (30%): 4 kg

[0052] Sodium metabisulfite: 22 kg

[0053] Water: 372 kg

[0054] 2. Preparation process steps and parameters:

[0055] (1) Preparation of acid regulator: first place 76 kg of industrial naphthalene and methylnaphthalene in a sulfonation reactor, heat up to 140 °C, add 70 kg of concentrated sulfuric acid with a content of 98%, and sulfonate it at 160 °C 2.5 h; transfer the reaction materials to the hydrolysis and condensation reaction kettle, cool down to 125 °C, and then pass 18...

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of production of coal water slurry and water coke slurry and particularly relates to a composite coal water slurry additive and a preparation process thereof. The preparation process specifically comprises the following steps: a naphthalene sulfonate formaldehyde condensate intermediate is prepared and serves as an acidic modifier, then the acidic modifier is added in a pulping black liquor modifying process, formaldehyde is taken as a raw material for hydroxymethylation and condensation polymerization, a naphthalene sulfonate formaldehyde condensate contains a large amount of free formaldehyde, and free formaldehyde in the sulfonate formaldehyde condensate is used effectively. The process is improved by integrating characteristics that the naphthalene sulfonate formaldehyde condensate needs an alkaline modifier for neutralization and pulping black liquor modification needs the acidic modifier for regulating pH of a reaction system, chemicalraw materials are saved, content of sodium sulfate in the water coke slurry additive is reduced, the problems of increased viscosity, reduced stability and the like of the water coke slurry due to high content of sodium sulfate are solved, the production cost is reduced while performance of the coal water slurry additive product is improved, and the process has good economic benefits.

Description

technical field [0001] The invention belongs to the technical field of production of coal-water slurry and water-coke slurry, and in particular relates to a composite coal-water slurry additive and a preparation process thereof. Background technique [0002] Coal-water slurry is a low-pollution, high-efficiency, pipeline-transportable oil-substituting coal-based fluid fuel obtained by physical processing of about 65% coal, 34% water and 1% additive. It has changed the traditional coal The combustion method shows a huge advantage in environmental protection and energy saving. Since the coal water slurry is a solid-liquid two-phase dispersion system, a small amount of additives should be added to prevent precipitation, so that the coal water slurry can achieve the purpose of shear thinning on the one hand, and on the other hand, prevent coal powder particles from agglomerating . [0003] At present, the most widely used product in the market is naphthalenesulfonate condensat...

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 Patents(China)
IPC IPC(8): C10L1/24
CPCC10L1/24C10L10/18
Inventor 邱慕涛
Owner 邱慕涛
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com