CN103265728B - Preparation method of cobalt decanoate adhesion promoter with high performance and low cobalt content - Google Patents

Abstract

The invention discloses a preparation method of a cobalt decanoate adhesion promoter with high performance and low cobalt content. The preparation method comprises the following steps of: preparing a cobalt solution and a sodium hydroxide solution; adding water to a reaction kettle, adding stronger ammonia water to the water, so that the pH value of the water reaches 9.5, then adding an antioxidant, stirring, respectively and simultaneously adding the cobalt solution and the sodium hydroxide solution to the reaction kettle, and appropriately adjusting the flow velocity of charging according to the change of a pH meter, so that the pH value is always maintained at 9.2-9.5; pumping reaction liquid into a pressure filter to be washed till the pH value of washing liquid reaches 7; dehydrating an inorganic cobalt salt for two times, then carrying out a double-decomposition reaction between the inorganic cobalt salt and a weak organic acid in butyl acetate, and steaming out all butyl acetate; and adding hexamethylene-1,6-bis(thiosulphate) sodium salt dehydrate and a high-performance rubber dispersant, uniformly dispersing and pelleting to obtain the cobalt decanoate adhesion promoter with high performance and low cobalt content.

Description

The preparation method of a kind of high-performance, low cobalt content capric acid cobalt adhesionpromoter

Technical field

The invention belongs to field of material engineering technology, be specifically related to the preparation method of high-performance, low cobalt content capric acid cobalt adhesionpromoter.

Background technology

Along with developing rapidly of China's motorway, the swift and violent increase of auto output, to increase considerably the demand of radial, the demand of the indispensable raw material-organic cobalt salt adhesion promotion agent to production radial is increasing so, more and more higher to specification of quality.For now, no matter be that domestic also external produced organic cobalt salt adhesion promotion agent is all the products that adopt cobalt to obtain from different organic acid reactions, belong to organic acid cobalt mixture, the content of cobalt is different by the product standard of the different trades mark, but in the time of the formulating of recipe of rubber item, the usage quantity of different organic cobalt salt adhesion promotion agents is to calculate with cobalt contents, the pure cobalt amount of namely occupying in every hundred umber rubber.Because organic cobalt adhesionpromoter action principle in application process is: organic cobalt salt adhesion promotion agent adds and is distributed to equably in whole system in mixing process, now just physical property is disperseed, in the time that rubber vulcanizes, there is replacement(metathesis)reaction with the coating surface of metallic surface at a certain temperature in organic cobalt salt adhesion promotion agent, generate the cobalt ion of free radical, between cobalt ion catalysis rubber and metal and sulphur, form stable chemical bond, reach the strong binding between rubber and metal, not only guarantee that tire has the performance of running at high speed, but also the work-ing life of prolongation tire.And cobalt is a kind of non-ferrous metal in organic cobalt salt adhesion promotion agent, it is again the little kind in non-ferrous metal, the not enough kiloton of cobalt that the whole nation produces from raw ore, most of dependence from external import cobalt ore, so the price of cobalt is all the time in high-end price, from cobalt salt adhesion promotion agent product, its cost accounts for 80% of total raw material price.Along with market competition is growing more intense under situation, cobalt salt adhesion promotion agent will become how much levels to increase on consumption, but price can proportionally not rise, therefore research and development are extremely necessary for cobalt new raw material or novel process.

Summary of the invention

Technical problem to be solved by this invention is to provide the preparation method of a kind of high-performance, low levels capric acid cobalt adhesionpromoter, the method adopts green environmental protection technique to produce comprehensively, make every physical and chemical indexes of product all reach company standard requirement, use properties is better than like product.

For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:

A preparation method for high-performance, low cobalt content capric acid cobalt adhesionpromoter, the method comprises the steps:

(1) inorganic solubility cobalt salt is dissolved in to water, configuration cobalt concentration reaches the cobalt liquor of 30～45g/L, the sodium hydroxide solution that configuration concentration is 40～50g/L, and above-mentioned two kinds of solution are for subsequent use after filtering respectively;

(2) in reactor, add water, add again strong aqua that the pH value of water is reached more than 9.5, then add antioxidant, open and stir, cobalt liquor and the sodium hydroxide solution of step (1) preparation are heated to respectively after 85 ± 5 DEG C, then add in aforesaid reaction vessel with the flow velocity of 15～16L/h and 17～18L/h respectively simultaneously, change and suitably adjust reinforced flow velocity according to pH meter, make pH value maintain all the time 9.2～9.5, until cobalt liquor adds completely;

(3) reaction solution step (2) being obtained is squeezed into pressure filter and is washed, until the pH value of washing lotion reaches 7;

(4) will dewater for the first time through step (3) inorganic cobalt salt after treatment, its water content is reached below 50%;

(5) adopt rotary flash drying system to dewater for the second time the inorganic cobalt salt after dehydration for the first time;

(6) the inorganic cobalt salt through twice dehydration is carried out to replacement(metathesis)reaction with weak organic acid in butylacetate, temperature of reaction slowly rose to 126 ± 2 DEG C by room temperature in 5～11 hours, then at this temperature, continued insulation reaction 1 hour; Wherein, described organic acid is any several combination in neodecanoic acid, PIVALIC ACID CRUDE (25), propionic acid and acetic acid, screening formulation is the combination of neodecanoic acid, PIVALIC ACID CRUDE (25) and propionic acid, or the combination of neodecanoic acid, PIVALIC ACID CRUDE (25) and acetic acid, optimum quality per-cent is: neodecanoic acid: PIVALIC ACID CRUDE (25): propionic acid or acetic acid=47～57:23～28:15～30;

(7) step (6) insulation reaction, after 1 hour, continued to be warming up to 140 DEG C in 1～2 hour, steamed whole butylacetates;

(8) in the reaction system obtaining to step (7), add hexa-methylene-1, the two Sulfothiorine dihydrates of 6-and high-performance rubber dispersion agent carry out granulation after being uniformly dispersed, and obtain high-performance, low cobalt content capric acid cobalt adhesionpromoter.

In step (1), described inorganic solubility cobalt salt is rose vitriol, cobalt chloride or Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES.

In step (2), described antioxidant is oxammonium hydrochloride, and the molar weight of antioxidant is 1～1.05:32 with the molar weight of cobalt element ratio.

In step (2), agitation condition is 50～60rpm; Reactor does not need heating.

In step (4), described dehydration is for the first time pressurization filter-press dehydration.

In step (5), adopt rotary flash drying system time of dewatering to be for the second time no more than 5 seconds, easily oxidized divalent cobalt ion, in moment dehydration, hightails oxidized environment, avoids the generation of trivalent cobalt.

In step (6), described temperature of reaction slowly rises to 126 ± 2 DEG C by room temperature and carries out as follows: temperature of reaction below 100 DEG C time, heats up with the speed of 20～30 DEG C/h; Temperature of reaction, in the time of 100～126 ± 2 DEG C, heats up with the speed of 5～10 DEG C/h.

In step (6), inorganic cobalt salt reacts with weak organic acid, and its reacting material ratio is followed routine techniques.

In step (7), butylacetate is as a kind of organic solvent, and its boiling point is 126.5 DEG C, and in the time that temperature reaches 130 DEG C, existing 90% solvent steams, but will steam as much as possible all solvents, and still needing to continue heating direct to 140 DEG C can.

In step (8), described hexa-methylene-1 adding, the two Sulfothiorine dihydrates of 6-(being called for short HTS) and high-performance composite dispersing agent, be white powder, and fineness is more than 200 orders, not containing free-water.Described high-performance composite dispersing agent is that Jiangsu Ka Ou Chemical Co., Ltd. produces, and product grade is AT-C, its major ingredient inside and outside lubricant agent, promoting agent, oxidation inhibitor, metal soap mixture.

In step (8), hexa-methylene-1, the quality that adds of the two Sulfothiorine dihydrates of 6-is 13～15% of finished product high-performance, low cobalt content capric acid cobalt adhesionpromoter total mass; The quality that adds of high-performance rubber dispersion agent is 5～7% of finished product high-performance, low cobalt content capric acid cobalt adhesionpromoter total mass.

Beneficial effect: the cobalt hydroxide powder that the inventive method utilizes special process to produce, because it has higher reactive behavior, therefore the outlet temperature that the organic acid weak with acidity reacts does not need at high temperature to carry out, therefore can select lower boiling organic solvent, so, shorten the production cycle, reduce again energy resource; Again because cobaltous hydroxide is higher than the cobalt contents of basic carbonate cobalt powder, charging capacity is few, and in the time carrying out neutralization reaction with weak organic acid without a large amount of carbon dioxide generating, also just can not be fast because of heat-up rate in reaction process, rise by pot and blocking pipeline causes security incident generation.

The present invention's organic solvent used is butylacetate, and its boiling point is 126.5 DEG C, as thinner, because it belongs to non-polar organic solvent, can with generate that organic cobalt is fine to mix; As band aqua, because its boiling point only has 126.5 DEG C, easily form azeotrope with water and be evaporated, reduce resultant, accelerate positive reaction speed, be conducive to reaction and carry out.

The present invention adopts hexa-methylene-1, the two Sulfothiorine dihydrates of 6-(being called for short HTS) and high-performance composite dispersing agent fully mix under high-temperature condition with high-performance, low cobalt content, Compositional type capric acid cobalt adhesionpromoter, thereby the cobalt contents of the capric acid cobalt adhesionpromoter of the standard of use has declined 4 percentage points, taking capric acid cobalt standard value 20.5% as example, product per ton uses pure cobalt amount to reduce 40 kilograms, and quotation is 200 yuan on every kg of pure cobalt existing network, the raw materials cost of capric acid cobalt 23 so per ton will reduce 8000 yuan.Greatly reduce manufacturing cost, greatly reduce again cobalt resource utilization.

High-performance, low levels capric acid cobalt adhesionpromoter that the present invention manufactures, this product should have performance except having former cobalt salt adhesion promotion agent series product, outstanding advantage is to greatly reduce cobalt consumption simultaneously, still can make between rubber and metal resistance to peel off with erosion resistance better, especially under different aging conditions (as NaCl and FeCl3 salt is aging, steam aging, aerobic and without oxygen aging), the conservation rate of most of physicals than for pure cobalt salt adhesion promotion agent better effects if.

Embodiment:

According to following embodiment, the present invention may be better understood.But, those skilled in the art will readily understand, the described concrete material proportion of embodiment, processing condition and result thereof be only for the present invention is described, and should also can not limit the present invention described in detail in claims.

Embodiment 1:

A preparation method for high-performance, low cobalt content capric acid cobalt adhesionpromoter, the method comprises the steps:

(1) 85KG rose vitriol (is contained to cobalt amount by 17KG, folding molar weight is 288.5mol) be dissolved in water, configuration cobalt concentration reaches the cobalt liquor 425L of 40g/L, the sodium hydroxide solution 510L that configuration concentration is 45g/L, and above-mentioned two kinds of solution are for subsequent use after filtering respectively;

(2) in reactor, add 200L water and 10L25～28% strong aqua that the pH value of water is reached more than 9.5, then adding 1.26L massfraction is 50% the antioxidant oxammonium hydrochloride aqueous solution, open and stir 55rpm, cobalt liquor and the sodium hydroxide solution of step (1) preparation are heated to respectively after 85 ± 5 DEG C, add in aforesaid reaction vessel with the flow velocity of 15～16L/h and 17～18L/h respectively more simultaneously, change and suitably adjust reinforced flow velocity according to pH meter, make pH value maintain all the time 9.2～9.5, until cobalt liquor adds completely;

(3) reaction solution step (2) being obtained is squeezed into pressure filter and is washed, until the pH value of washing lotion reaches 7;

(4) will dewater for the first time (pressurization filter-press dehydration) through step (3) inorganic cobalt salt after treatment, its water content is reached below 50%;

(5) adopt rotary flash drying system to dewater for the second time the inorganic cobalt salt after dehydration for the first time, the time is no more than 5 seconds;

(6) by through the inorganic cobalt salt of twice dehydration (in pure cobalt amount 16.5KG, mole number is 280.0mol) in butylacetate, carry out replacement(metathesis)reaction with 30.6KG neodecanoic acid, 17.7KG PIVALIC ACID CRUDE (25) and 15.7KG propionic acid, speed with 20 DEG C/h heats up, in the time that temperature reaches 100 DEG C, starting point water refluxes, heat-up rate is reduced to 5 DEG C/h simultaneously, and temperature of reaction rises to 126 DEG C, continues insulation reaction 1 hour;

(7) step (6) insulation reaction, after 1 hour, stops point water and refluxes, and starts to steam solvent, continues to be warming up to 140 DEG C in 1～2 hour, steams organic solvent butylacetate;

(8) in the reaction system obtaining to step (7), add 15KG hexa-methylene-1, the two Sulfothiorine dihydrates of 6-and 5KG high-performance composite dispersing agent, after being uniformly dispersed, carry out granulation, obtain 100KG high-performance, low cobalt content capric acid cobalt adhesionpromoter, its physicochemical property parameter is in table 1.

Embodiment 2:

Step (1) is identical with example 1 to step (5);

(6) by through the inorganic cobalt salt of twice dehydration (in pure cobalt amount 16.5KG, mole number is 280.0mol) in butylacetate, carry out replacement(metathesis)reaction with 36.8KG neodecanoic acid, 15.2KG PIVALIC ACID CRUDE (25) and 12KG acetic acid, speed with 20 DEG C/h heats up, in the time that temperature reaches 100 DEG C, starting point water refluxes, heat-up rate is reduced to 5 DEG C/h simultaneously, and temperature of reaction rises to 126 DEG C, continues insulation reaction 1 hour;

Step (7) is identical with example 1 to step (8);

Its physicochemical property parameter is in table 1.

Embodiment 3:

Step (1) is identical with example 1 to step (7);

(8) in the reaction system obtaining to step (7), add 13KG hexa-methylene-1, the two Sulfothiorine dihydrates of 6-and 7KG high-performance composite dispersing agent, after being uniformly dispersed, carry out granulation, obtain common 100KG high-performance, low cobalt content capric acid cobalt adhesionpromoter, its physicochemical property parameter is in table 1.

Its physicochemical property parameter is in table 1.

Comparative example 1:

This comparative example adopts the disclosed existing method of Chinese patent 200910025533.4.

100KG rose vitriol is dissolved in to water, and configuration cobalt concentration reaches the cobalt liquor of 30g/L, then the sodium hydroxide solution that configuration concentration is 200g/L respectively and the concentration sodium carbonate solution that is 150g/L, and above-mentioned three kinds of solution are for subsequent use after filtering respectively;

Cobalt liquor is heated to 85 ± 5 DEG C, under 60rpm agitation condition, slowly adding temperature is the sodium hydroxide solution of 40～50 DEG C, in the time that the pH of reaction solution value is 7, under 40rpm agitation condition, more slowly to add temperature be the sodium carbonate solution of 40～50 DEG C, in the time that the pH of reaction solution value is 9.5, stop adding sodium carbonate solution, holding temperature, at 50～60 DEG C, continues to be stirred to pH value and does not change;

Reaction solution is left standstill, get precipitation water rinse, until the pH value of rinsing liquid reaches 7;

The inorganic cobalt salt of precipitation good rinsing is dewatered for the first time through press filtration, its water content is reached below 50%;

By the inorganic cobalt salt of precipitation after dehydration for the first time, adopt rotary flash drying system to dewater for the second time;

By the inorganic cobalt salt of precipitation (39KG) through twice dehydration, pure cobalt is 20.5KG, in industrial naptha environment, react with acetic acid (13KG), PIVALIC ACID CRUDE (25) (25KG) and neodecanoic acid (42KG), in the time that temperature of reaction is below 100 DEG C, speed with 15 DEG C/h heats up, when temperature of reaction is during at 100～140 DEG C, heat up with the speed of 10 DEG C/h; When temperature of reaction is during at 140～160 DEG C, control the heating-up time at 5 hours, in the time that temperature reaches 160 DEG C, reaction finishes;

After reaction finishes, carry out granulation, obtain capric acid cobalt adhesionpromoter product, its physicochemical property parameter is in table 1.

Illustrate: above-mentioned 4 examples are raw materials used is all same producer.

The physicochemical property parameter of the product that table 1: embodiment 1, embodiment 2, embodiment 3 and comparative example 1 make respectively

Project	Comparative example 1	Embodiment 1	Embodiment 2	Embodiment 3
					Outward appearance	Bluish voilet is granular	Bluish voilet is granular	Bluish voilet is granular	Bluish voilet is granular
Cobalt mass percent, %	20.5	16.5	16.5	16.5
					Softening temperature, DEG C	92	90	90	90
Weight loss on heating (105 DEG C, 2h), %	0.2	0.3	0.3	0.3
					Density, g/cm 3	1.2	1.1	1.1	1.1
Infrared spectra (reference standard collection of illustrative plates)	Comparable	Comparable	Comparable	Comparable

Embodiment 5: the application test of product.

Two products that embodiment 1 and comparative example 1 are obtained are made respectively the belt sizing material of full steel wire heavy load radial tire, and in formula system, all raw material consumptions are all consistent, survey glue bond and weathering test thereof.

Testing method is (H extraction method).The results are shown in Table 2.

Table 2

Note: steam aging condition: 100 DEG C × 72h; Thermal ageing condition: 100 DEG C × 72h; Salt solution aging condition: 20% salt solution × 4d.

Claims (7)

1. a preparation method for high-performance, low cobalt content capric acid cobalt adhesionpromoter, is characterized in that, the method is only made up of following steps:

(1) inorganic solubility cobalt salt is dissolved in to water, configuration cobalt concentration reaches the cobalt liquor of 30～45g/L, the sodium hydroxide solution that configuration concentration is 40～50g/L, and above-mentioned two kinds of solution are for subsequent use after filtering respectively;

(2) in reactor, add water, add again strong aqua to make the pH value of water reach 9.5, then add antioxidant, open and stir, cobalt liquor and the sodium hydroxide solution of step (1) preparation are heated to respectively after 85 ± 5 DEG C, then add in aforesaid reaction vessel with the flow velocity of 15～16L/h and 17～18L/h respectively simultaneously, change and suitably adjust reinforced flow velocity according to pH meter, make pH value maintain all the time 9.2～9.5, until cobalt liquor adds completely;

(3) reaction solution step (2) being obtained is squeezed into pressure filter and is washed, until the pH value of washing lotion reaches 7;

(4) will dewater for the first time through step (3) inorganic cobalt salt after treatment, its water content is reached below 50%;

(5) adopt rotary flash drying system to dewater for the second time the inorganic cobalt salt after dehydration for the first time;

(6) the inorganic cobalt salt through twice dehydration is carried out to replacement(metathesis)reaction with weak organic acid in butylacetate, temperature of reaction slowly rose to 126 ± 2 DEG C by room temperature in 5～11 hours, then at this temperature, continued insulation reaction 1 hour; Wherein, described organic acid is the combination of neodecanoic acid, PIVALIC ACID CRUDE (25) and propionic acid, or the combination of neodecanoic acid, PIVALIC ACID CRUDE (25) and acetic acid, and mass ratio is: neodecanoic acid: PIVALIC ACID CRUDE (25): propionic acid or acetic acid=47～57:23～28:15～30;

(7) step (6) insulation reaction, after 1 hour, continued to be warming up to 140 DEG C in 1～2 hour, steamed organic solvent butylacetate;

(8) in the reaction system obtaining to step (7), add hexa-methylene-1, the two Sulfothiorine dihydrates of 6-and high-performance composite dispersing agent carry out granulation after being uniformly dispersed, and obtain high-performance, low cobalt content capric acid cobalt adhesionpromoter.

2. the preparation method of high-performance according to claim 1, low cobalt content capric acid cobalt adhesionpromoter, is characterized in that, in step (1), described inorganic solubility cobalt salt is rose vitriol, cobalt chloride or Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES.

3. the preparation method of high-performance according to claim 1, low cobalt content capric acid cobalt adhesionpromoter, it is characterized in that, in step (2), described antioxidant is oxammonium hydrochloride, and the molar weight of antioxidant is 1～1.05:32 with the molar weight of cobalt element ratio.

4. the preparation method of high-performance according to claim 1, low cobalt content capric acid cobalt adhesionpromoter, is characterized in that, in step (4), described dehydration is for the first time pressurization filter-press dehydration.

5. the preparation method of high-performance according to claim 1, low cobalt content capric acid cobalt adhesionpromoter, is characterized in that, in step (5), the time that adopts rotary flash drying system to dewater is for the second time no more than 5 seconds.

6. the preparation method of high-performance according to claim 1, low cobalt content capric acid cobalt adhesionpromoter, it is characterized in that, in step (6), described temperature of reaction slowly rises to 126 ± 2 DEG C by room temperature and carries out as follows: temperature of reaction below 100 DEG C time, heats up with the speed of 20～30 DEG C/h; Temperature of reaction more than 100 DEG C time, heats up with the speed of 5～10 DEG C/h.

7. the preparation method of high-performance according to claim 1, low cobalt content capric acid cobalt adhesionpromoter, it is characterized in that, in step (8), hexa-methylene-1, the quality that adds of the two Sulfothiorine dihydrates of 6-is 13～15% of finished product high-performance, low cobalt content capric acid cobalt adhesionpromoter total mass; The quality that adds of high-performance composite dispersing agent is 5～7% of finished product high-performance, low cobalt content capric acid cobalt adhesionpromoter total mass.