JPS58199032A - Carbonaceous material formed into aqueous slurry - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Background of the Invention l. FIELD OF THE INVENTION The present invention relates to a carbonaceous material as an aqueous slurry, particularly an aqueous slurry of coal stabilized with an ammonium salt of a formaldehyde condensate of nanotalenesulfonic acid.

2. Description of the Prior Art The problem of transportation is one of the important issues when using granular carbonaceous materials such as coal. One of the transportation methods is
There is a method of making a water-based slurry. However, it is difficult to pump a water-based slurry of pulverized coal with a solid content of about 55 cm or more using a slurry pump. This means that the solid concentration is 5
This is because when the water reaches 0 or more, water and coal separate and coal particles accumulate in the divine part of the pump system. Due to this slurry dewatering phenomenon, the pump system becomes blocked and the flow stops.

On the other hand, there is a desire to reduce its water content in a coal water-based slurry since water has become a major factor in transportation and operating costs.

The smaller the amount of water transported, the larger the volume of coal moved, and the better the transport efficiency. Furthermore, water resources are also limited. Also, a significant amount of heat is required to evaporate water during the combustion of one coal. The lower the water content, the more efficient the coal combustion process becomes. Therefore, the use of an aqueous slurry of carbonaceous material with a higher solids content than previously possible is an extremely complex problem.

“unk U.S. Patent No. 4, issued August 4, 1981.
282. o In the specification of No. 06, 'added to the slurry'
In order to intensify the dispersion effect produced by the sludge and/or dispersant, it is possible to transport 71 min of coal particles in a matrix with a high content of coal particles with minimum porosity and maximum particle area. Coal water system column 53rd to 3rd
Although it is described in Column 1, Line 9, condensed 7-nonaphthalene sulfonic acid and its sodium ammonium salt (No. 30
Column 19th line and 20th line) are included.

SUMMARY OF THE INVENTION A slurry of a carbon-membered material having a low viscosity and improved pumpability is stabilized in an aqueous system in the presence of an ammonium salt of a naphthalene sulfonic acid formaldehyde condensate as a stabilizer. The ammonium salt of this condensate is present in a partial amount to reduce the viscosity of the aqueous slurry of carbonaceous minerals and improve its transport properties.

Detailed Description Ammonium salt of naphthalene sulfonic acid formaldehyde condensate (hereinafter referred to as ammonium tanakichi condensate for convenience)
is present in the slurry in part to lower the viscosity of the slurry and improve its pumpability. The concentration of the ammonium salt of the condensate to be added is within 10 mm, preferably from about 10 mm to about 5 mm, based on the total weight of the aqueous slurry of carbonaceous paulownia wood. ．． It is 0 diljt%. For example, a ratio of about 0.05 to about 0.5 based on the total weight of the slurry, ie, the total weight of solids and water, can be used. The amount of ammonium salt of the condensate can be easily determined by adding enough condensate to form a soft precipitate. The resulting slurry generally has a solids content of about 50 to about 80 F or more, with the balance being water. The ammonium salts of naphthalene sulfonic acid formaldehyde condensates have the advantages described below over the sodium salts or other metal salts of these condensates.

(a) The ammonium salt of the condensate does not produce ash or form slag during combustion of the slurry.

(b) The ammonium salt of compound 16 has improved performance as a slurry stabilizer.

<C) Solutions of ammonium salts of condensates are cheaper to produce than others. Furthermore, (d) the solution of the ammonium salt of the condensate has improved low temperature storage properties.

The ammonium salt of the condensate is added to the slurry at a convenient point in its manufacture.

The term "carbonaceous material" used in this specification and the appendix refers to solid granular carbonaceous fossil fuels, which are crushed until 80 or more particles pass through a 200-mesh mesh. The carbonaceous materials used and obtained include blue coal, anthracite, coke, oil coke, lignite, charcoal, peat, and mixtures thereof.These materials are crushed. The powder is then milled to obtain finely divided particles for use in a water-based slurry that can be fed to an I-MP.

Water used for slurry should be sourced from mines, wells, rivers, or lakes.
N or N can be harvested from available water sources such as desalinated seawater, which can adjust the electrochemical relationship at the interface with the poorly retained water in the condensed aqueous layer, and can be pulverized. In order to suppress corrosion 71 of equipment, piping, and furnaces as much as possible, the salt content must be reduced by 'tt.

The ammonium salt of nanotalenesulfonic acid-formaltehyde umbrella compound can be produced by total reaction of naphthalene, formaldehyde and sulfuric acid, and finally treatment with ammonium hydroxide. A method that may be used is described in U.S. Pat. No. 2.14' 1.
No. 569, Rebel et al., U.S. Pat. No. 8,193.575, July 6, 1965;
, 277.162.

Naphthalene sulfonic acid formaldehyde condensate is a condensation product with naphthalene sulfonic acid formaldehyde. This condensate is subjected to size exclusion chromatography (size exclusion chromatography) through a column with 1' pores sized to selectively separate the molecular volumes according to their size.
n chromatography). The acid phase solvent used in chromatography must be one that minimizes phase effects between the solute and the packing and between the solutes. The chromatogram shows the true molecular volume profile when the eluate is displayed on the detector's strip chart recorder display. The chromatogram of the sulfonic acid sample used in the examples is as follows:
U.S. Patent No. 3 to 4drian et al., May 4, 1976.
It is the same as that for the sodium salt of the naphthalene sulfonic acid formaldehyde condensate described in No. 6, No. 954,491. That is, the anionic substance generated from the sulfonic acid is a naphthalene formaldehyde sulfone having a minimum elution volume of about 61% to about 70% of the total elution volume and an equivalent weight loss of about 61% to about 70% of the total elution volume. It has the same profile as anionic substances produced from acid soda. The disclosures of US Pat. No. 3,954,491 regarding chromatography are incorporated herein by reference. This chromatographic method is carried out by Ilo, Rifton, New Chassis.
fJ'rrLan ba Roche Auditorium 1978
Minisyn 7 of the Northern Chassis Chromatography Group Subcommittee of the American Chemical Society, held on March 6, 2016.
Submitted to Dodium Dr, 1iaro l d E
de l s t e in's Aqueous Get
Pevmeation Chronatograp
hof Some Naphthalene 5ulf
onic Ac1d1+'ormalde,hyde
Con, densattts" (aqueous gel permeation chromatography of certain naphthalene sulfonic acid formaldehyde condensates).

Evaluation of Stabilizers for Aqueous Slurries of Carbonaceous Materials In the Examples below, a method for evaluating ammonium salts of naphthalene sulfonic acid formaldehyde condensates is used. In this method, the ability of ammonium salts of these condensates to uniformly disperse or suspend coal powder is determined by measuring viscosity.

Equipment used: 8 oz. paint cans; low shear mechanical mixer with double vanes; Helastoma complete set; viscometer; Reagents: water coal powder of known hardness; The passing Pintostone coal (American type), the coal type and particle size of the pond may be used instead.

Stabilizing agent method 1: A water slurry of coal powder is produced by the following method. The coal powder is added to the water while stirring with a two-blade low shear mechanical mixer. Scrape the sides of the container regularly while stirring. Stir the slurry for an additional 1 hr to ensure sufficient homogeneity. The percentage of solids in the slurry is determined by measuring the difference in weight.

2. Slurry sample 201k, 8 oz (approximately 250I)
Measure the viscosity of the aqueous slurry by weighing it into the cans to be injected. Add all of the specific condensate ammonium salt to each can while stirring vigorously. The concentration range of the condensate ammonium salt used is 0.10 to 1 g/20
It is set to 0.9. Seal each can to prevent water from evaporating.

3. Before opening the can and measuring the viscosity with a stormer viscometer, stir the valley slurry vigorously. Adjust the superposition so that the viscosity measurement value is as close to 30 seconds as possible, and
Find the exact weight that indicates a viscosity of 0 seconds. The measurement is repeated twice after each stirring. Measured values should not differ by more than 2 seconds. The measurement is carried out in a case where the slurry becomes viscous, and the average value of the two measurements is taken. Measurements on slurries containing a wide range of concentrations of condensate ammonium salts show that when the condensate ammonium salts no longer reduce the viscosity of the slurry and/or the coal settles out of the slurry, Let's continue.

4.Second and llf break unit (Krebs-u)
nit.

Convert to KU). The Krebs units are then converted to centipoise 111.

In order to fully understand the nature and advantages of the present invention,
Please refer to the examples below.

These examples are provided to illustrate the invention and are not to be considered limiting. All amounts, proportions, and percentages are by weight.

Example I A coal water slurry sample was prepared by adding 1 sample of the sodium salt of the condensate (4 sodium of naphthalene sulfonic acid formalin condensate) and 4 of the ammonium salt of the condensate (4 sodium of naphthalene sulfonic acid formalin condensate) as shown in the following table. Treated with a solution of ammonium salt) L7? . The coal water slurry was a slurry of 60 t% in Pittston coal powder total raw water. When the coal slurry sample is dried, the solid content is 59
．． He was taking 1% for his own benefit. The break in the table is 1 coal water slurry I
This is the weight of the additive solution used in J-200y. Treatment! 41! A sample of a coal slurry without water was used as a blank, and a sample treated with the sodium salt of the condensate was used as a comparison sample. The additive solution used in the comparative sample was a 34% solution of condensate (IJ).

The other two additive bath solutions -'t and - are 4O with a pH of 6.5.
42 of condensed ammonium salt bath solution and pt14.0
．． It was a tri-condensate ammonium salt solution. Next, the Busink sample, the comparative sample, and the slurry sample treated with the condensate ammonium salt were evaluated using the method described above, and the results described below were obtained.

- Blank -0.1
0 84% Tsumugi compound sodium, tx 0.0
00280.15
0.000480・20
0.000570.25
0.000710.35
0.000990.10 40'
% condensate ammonium salt o, o o o a aO
,150,00050 0,200,00067 0・25 0.0
008 Bo, 10 42. ．． 8% reduced product ammonium salt 0.000 B 50.15
0.000580.20
0.000700・25
0.00088
800 82 132 40008
00 28 98 128020
0 80 82 925175
29 76 766150
25 66 460125
81 68 500200
82 88 950175
80 7T 800125
1 67 480250 27
86 1033175 29
76 766150 80
72 633125 29
66 460 Although some specific embodiments have been described for the present research VC, changes and changes may be made within the full scope of the excluded claims.

These VC41: are not limited to these.

Patent applicant Diamond Jamrock Corporation (3 others)

Claims (1)

[Claims] 1. An ammonium salt of naphthalene sulfonic acid formaldehyde condensate sufficient to reduce viscosity and improve pumpability in an aqueous slurry carbon material composition comprising an aqueous carbonaceous material. A composition characterized in that it has an effective acid present therein. 2. The composition of claim 1, wherein the condensate is present at about 10% by weight or less. 3. The composition of claim 1, wherein said condensate is present in about 0.01 to about 5 times. 4. The composition according to claim 1, wherein the carbonaceous material is coal. 5. A method for pumping an aqueous slurry of a carbonaceous material composition in a pipe, characterized in that the composition according to claim 1 is present. 6. A patent characterized in that a method for discharging an aqueous slurry of a carbonaceous material composition in piping is characterized in that the composition according to any one of claims 2 to 4 is present. The method described in Scope No. 5.