CN105540600A - Production process of kaolin for low quartz content catalytic cracking catalyst - Google Patents
Production process of kaolin for low quartz content catalytic cracking catalyst Download PDFInfo
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Abstract
The invention relates to the technical field of a catalytic cracking catalyst, in particular to a production process of kaolin for a low quartz content catalytic cracking catalyst. The process comprises the following steps: step 1, dispersing kaolin raw ore; step 2, grading; step 3, settling; step 4, press filtering dehydrating and the method can further comprise: step 5, drying and step 6, grinding and can further comprises a step A of bleaching between the step 3 and the step 4. According to the production process of kaolin for the low quartz content catalytic cracking catalyst, the quartz content is controlled to be below 3.6%, and the quartz content can be controlled to be below 1.5%. The reason for the generation of low quartz content of kaolin for the low quartz content catalytic cracking catalyst is a synergic action of step 1, dispersing the kaolin raw ore, step 2, grading and step 3, settling.
Description
Technical field
The present invention relates to catalytic cracking catalyst technical field of kaolin, be specifically related to a kind of catalytic cracking catalyst production technology of low quartz content.
Background technology
Worldwide, oil has become most important and topmost energy sources in human being's production, life, and the refining of oil is one of important technology of petroleum application, and catalytic cracking (FCC) technology is then the dominant technology of refining of petroleum processing.In FCC technique, high performance catalyzer is the important means improving refining efficiency and benefit.
Since 20 century 70s, taken kaolin as the refining catalytic cracking catalyst that major ingredient makes, become the bulk catalyst of China and foreign countries' oil refining, petrochemical industry, kaolin reaches 30% ~ 50% as the deal that a kind of carrier is shared wherein.In modern technologies, in order to reduce costs, need to reduce molecular sieve consumption, increasing kaolin consumption, the deal that therefore kaolin is shared in the catalyst also has the trend increased, and it is also proposed higher requirement to kaolinic quality.
Quartz content is the kaolinic important indicator of catalytic cracking catalyst, and in kaolin, quartz content is lower, more has lifting to the quality of catalytic cracking catalyst.
But, in prior art, quartz content in the kaolin of catalytic cracking catalyst is generally more than 3.6%, and adopt quartz content be more than 3.6% the catalytic cracking catalyst prepared of kaolin, its activity, stability, preventing from heavy metal performance, slag oil cracking performance, gasoline selective energy and abrasion resistance, regenerability are all poor.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, a kind of catalytic cracking catalyst production technology of low quartz content is provided.
To achieve these goals, the present invention adopts following technical scheme:
There is provided a kind of catalytic cracking catalyst production technology of low quartz content, it comprises the following steps:
Step one, dispersed kaolin raw ore: kaolin raw ore and dispersant are evenly carried out dispersion step, the ore pulp of obtained dispersion, and the pH value and the proportion that control the ore pulp of dispersion;
Step 2, classification: utilize the ore pulp of whizzer to the dispersion that step one obtains to carry out classification, obtain the ore pulp after classification;
Step 3, sedimentation: the ore pulp after classification is put into settling bowl and carries out sedimentation, and environmentally temperature control settlement time, obtain settled slurry;
Step 4, filter-press dehydration: the settled slurry that step 3 is obtained carries out filter-press dehydration, obtained filter cake, and control the moisture content of filter cake, i.e. the catalytic cracking catalyst kaolin of obtained low quartz content.
In technique scheme, after described step 4 filter-press dehydration step, also comprise step 5, dry: the filter cake that step 4 is obtained carries out drying, and controls certain moisture content, i.e. the catalytic cracking catalyst kaolin of obtained low quartz content.
In technique scheme, after described step 5 drying step, also comprise step 6, pulverize: dried for step 5 filter cake is pulverized, be i.e. the catalytic cracking catalyst kaolin of obtained low quartz content.
In technique scheme, between described step 3 precipitation step and step 4 filter-press dehydration step, also comprise steps A, bleaching: the settled slurry utilizing SYNTHETIC OPTICAL WHITNER obtained to step 3 is bleached, the slurry of obtained bleaching, and control the pH value of slurry of bleaching, and the content of ferric oxide in the slurry controlling bleaching.
In technique scheme, in described step one dispersed kaolin raw ore step, described dispersion agent by weight ratio be the water glass of 40 ~ 60:1 ~ 3:0.5 ~ 1.5, caustic soda and Sodium hexametaphosphate 99 form;
The proportion of described water glass is 38 ~ 45;
In described step one dispersed kaolin raw ore step, the pH value controlling the ore pulp of dispersion is 7.5 ~ 8.5; The proportion controlling the ore pulp of dispersion is 1.13 ~ 1.15.
In technique scheme, in the classification step of described step 2, the granularity of the ore pulp after the described classification of 90% ~ 98% weight percent is 2 μm;
In described step 2 classification step, described whizzer is horizontal spiral centrifuge.
In technique scheme, in described step 3 precipitation step, the described environmentally temperature control settlement time, be specially: when envrionment temperature is 20 DEG C ~ 50 DEG C, the settling time is 48h ~ 72h; When envrionment temperature is 0 DEG C ~ 20 DEG C, the settling time is 50h ~ 85h.
In technique scheme, in described step 4 filter-press dehydration step, the moisture content controlling filter cake is 20% ~ 36%.
In technique scheme, in described step 5 drying step, filter cake obtained for step 4 is carried out drying by airing is air-dry, and to control moisture content be 5% ~ 15%, i.e. the catalytic cracking catalyst kaolin of obtained low quartz content.
In technique scheme, in described steps A blanching step, the pH value of slurry controlling bleaching is 2.6 ~ 3.0, and in the slurry controlling bleaching the content of ferric oxide for being less than 0.8%.
Compared with prior art, beneficial effect is in the present invention:
(1) the catalytic cracking catalyst production technology of a kind of low quartz content provided by the invention, not only can control the content of quartz below 3.6%, and quartzy content can be controlled below 1.5%, why the present invention can reduce the kaolinic quartz content of catalytic cracking catalyst of produced low quartz content, this is the dispersed kaolin raw ore of step one, the classification of step 2 and the synergistic result of sedimentation of step 3, in the dispersed kaolin raw ore step of step one, if dispersion effect is bad, coarse particles then in kaolin raw ore can not be separated, quartz can exceed standard, in addition, the classification of step 2 and the sedimentation of step 3 are the crucial factors guaranteeing the further classification of ore pulp disperseed, namely the crucial factor that can quartz up to standard.
(2) the catalytic cracking catalyst production technology of a kind of low quartz content provided by the invention, in step one dispersed kaolin raw ore step, the pH value of ore pulp and the effect of proportion that control dispersion are respectively: the pH value controlling the ore pulp of dispersion mainly ensures the dispersion effect of the ore pulp disperseed; The proportion controlling the ore pulp of dispersion has 2 effect: a, if the proportion of the ore pulp of dispersion is too small, namely the ore pulp disperseed is too rare, slurry in the ore pulp of dispersion very little, industrial chemicals is wasted in the process that bleaching is produced, waste the electricity charge and time in the process of filter-press dehydration, reduce production efficiency, improve production cost; B, if the proportion of the ore pulp of dispersion is excessive, affects dispersion effect, and dispersion is abundant not, and the catalytic cracking catalyst of produced low quartz content kaolinic granularity and quartz content can be caused to exceed standard.
(3) the catalytic cracking catalyst production technology of a kind of low quartz content provided by the invention, in step 3 precipitation step, the environmentally temperature control settlement time, very crucial with kaolinic quartz content for the catalytic cracking catalyst controlling the low quartz content produced, when envrionment temperature is 20 DEG C ~ 50 DEG C, settling time at least controls as 48h, the catalytic cracking catalyst of the low quartz content that guarantee is produced is less than 3.6% with kaolinic quartz content, settling time at least controls as 65h, the catalytic cracking catalyst of the low quartz content that guarantee is produced is less than 1.5% with kaolinic quartz content,
When envrionment temperature is 0 DEG C ~ 20 DEG C, settling time at least controls as 50h, the catalytic cracking catalyst of the low quartz content that guarantee is produced is less than 3.6% with kaolinic quartz content, settling time at least controls as 78h, and the catalytic cracking catalyst of the low quartz content that guarantee is produced is less than 1.5% with kaolinic quartz content.
(4) the catalytic cracking catalyst production technology of a kind of low quartz content provided by the invention, has production technique simple, and can be applicable to the feature of scale operation.
Embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Wherein, the proportion of the ore pulp of the dispersion that the present invention mentions, is the relative density of the ore pulp of dispersion.
Wherein, the proportion of the water glass that the present invention mentions, is the relative density of water glass.
embodiment 1.
A catalytic cracking catalyst production technology for low quartz content, it comprises the following steps:
Step one, dispersed kaolin raw ore: kaolin raw ore and dispersant are evenly carried out dispersion step, the ore pulp of obtained dispersion, and the pH value and the proportion that control the ore pulp of dispersion; In the present embodiment, dispersion agent by weight ratio be the water glass of 50:2:1, caustic soda and Sodium hexametaphosphate 99 form; Wherein, the proportion of water glass is 40; In the present embodiment, the pH value controlling the ore pulp of dispersion is 8; The proportion controlling the ore pulp of dispersion is 1.14;
Step 2, classification: utilize the ore pulp of whizzer to the dispersion that step one obtains to carry out classification, obtain the ore pulp after classification; The granularity of the ore pulp after the classification of 95% weight percent is 2 μm; Wherein, whizzer is horizontal spiral centrifuge;
Step 3, sedimentation: the ore pulp after classification is put into settling bowl and carries out sedimentation, and environmentally temperature control settlement time, obtain settled slurry; In this step, environmentally the temperature control settlement time, be specially: when envrionment temperature is 30 DEG C, the settling time is 60h; When envrionment temperature is 10 DEG C, the settling time is 68h;
Step 4, filter-press dehydration: the settled slurry that step 3 is obtained carries out filter-press dehydration, obtained filter cake, and the moisture content controlling filter cake is 28%, i.e. the catalytic cracking catalyst kaolin of obtained low quartz content.
The catalytic cracking catalyst production technology of a kind of low quartz content of the present embodiment, the catalytic cracking catalyst of the low quartz content produced is 2.0% with kaolinic quartz content.
embodiment 2.
A catalytic cracking catalyst production technology for low quartz content, it comprises the following steps:
Step one, dispersed kaolin raw ore: kaolin raw ore and dispersant are evenly carried out dispersion step, the ore pulp of obtained dispersion, and the pH value and the proportion that control the ore pulp of dispersion; In the present embodiment, dispersion agent by weight ratio be the water glass of 40:1:0.5, caustic soda and Sodium hexametaphosphate 99 form; Wherein, the proportion of water glass is 38; Wherein, the pH value controlling the ore pulp of dispersion is 7.5; The proportion controlling the ore pulp of dispersion is 1.13;
Step 2, classification: utilize the ore pulp of whizzer to the dispersion that step one obtains to carry out classification, obtain the ore pulp after classification; In the present embodiment, the granularity of the ore pulp after the classification of 90% weight percent is 2 μm; Wherein, whizzer is horizontal spiral centrifuge;
Step 3, sedimentation: the ore pulp after classification is put into settling bowl and carries out sedimentation, and environmentally temperature control settlement time, obtain settled slurry; In the present embodiment, environmentally the temperature control settlement time, be specially: when envrionment temperature is 20 DEG C, the settling time is 48h; When envrionment temperature is 0 DEG C, the settling time is 50h;
Step 4, filter-press dehydration: the settled slurry that step 3 is obtained carries out filter-press dehydration, obtained filter cake, and the moisture content controlling filter cake is 20%;
Step 5, dry: the filter cake that step 4 is obtained carries out drying by airing is air-dry, and to control moisture content be 10%, i.e. the catalytic cracking catalyst kaolin of obtained low quartz content.
The catalytic cracking catalyst production technology of a kind of low quartz content of the present embodiment, the catalytic cracking catalyst of the low quartz content produced is 3.5% with kaolinic quartz content.
embodiment 3.
A catalytic cracking catalyst production technology for low quartz content, it comprises the following steps:
Step one, dispersed kaolin raw ore: kaolin raw ore and dispersant are evenly carried out dispersion step, the ore pulp of obtained dispersion, and the pH value and the proportion that control the ore pulp of dispersion; In the present embodiment, dispersion agent by weight ratio be the water glass of 60:3:1.5, caustic soda and Sodium hexametaphosphate 99 form; Wherein, the proportion of water glass is 45; Wherein, the pH value controlling the ore pulp of dispersion is 8.5; The proportion controlling the ore pulp of dispersion is 1.15;
Step 2, classification: utilize the ore pulp of whizzer to the dispersion that step one obtains to carry out classification, obtain the ore pulp after classification; In the present embodiment, the granularity of the ore pulp after the classification of 98% weight percent is 2 μm; Wherein, whizzer is horizontal spiral centrifuge;
Step 3, sedimentation: the ore pulp after classification is put into settling bowl and carries out sedimentation, and environmentally temperature control settlement time, obtain settled slurry; In the present embodiment, environmentally the temperature control settlement time, be specially: when envrionment temperature is 50 DEG C, the settling time is 72h; When envrionment temperature is 20 DEG C, the settling time is 85h;
Step 4, filter-press dehydration: the settled slurry that step 3 is obtained carries out filter-press dehydration, obtained filter cake, and the moisture content controlling filter cake is 36%;
Step 5, dry: the filter cake that step 4 is obtained carries out drying by airing is air-dry, and to control moisture content be 5%;
Step 6, pulverizes: pulverized by dried for step 5 filter cake, i.e. the catalytic cracking catalyst kaolin of obtained low quartz content.
The catalytic cracking catalyst production technology of a kind of low quartz content of the present embodiment, the catalytic cracking catalyst of the low quartz content produced is 1.3% with kaolinic quartz content.
embodiment 4.
A catalytic cracking catalyst production technology for low quartz content, it comprises the following steps:
Step one, dispersed kaolin raw ore: kaolin raw ore and dispersant are evenly carried out dispersion step, the ore pulp of obtained dispersion, and the pH value and the proportion that control the ore pulp of dispersion; In the present embodiment, dispersion agent by weight ratio be the water glass of 45:1.5:0.8, caustic soda and Sodium hexametaphosphate 99 form; Wherein, the proportion of water glass is 42; Wherein, the pH value controlling the ore pulp of dispersion is 7.8; The proportion controlling the ore pulp of dispersion is 1.13;
Step 2, classification: utilize the ore pulp of whizzer to the dispersion that step one obtains to carry out classification, obtain the ore pulp after classification; In the present embodiment, the granularity of the ore pulp after the classification of 92% weight percent is 2 μm; Wherein, whizzer is horizontal spiral centrifuge;
Step 3, sedimentation: the ore pulp after classification is put into settling bowl and carries out sedimentation, and environmentally temperature control settlement time, obtain settled slurry; In the present embodiment, environmentally the temperature control settlement time, be specially: when envrionment temperature is 25 DEG C, the settling time is 55h; When envrionment temperature is 15 DEG C, the settling time is 60h;
Steps A, bleaching: the settled slurry utilizing SYNTHETIC OPTICAL WHITNER obtained to step 3 is bleached, the slurry of obtained bleaching, and the pH value controlling the slurry of bleaching is 2.8, and in the slurry controlling bleaching the content of ferric oxide for being less than 0.8%;
Step 4, filter-press dehydration: the settled slurry that step 3 is obtained carries out filter-press dehydration, obtained filter cake, and the moisture content controlling filter cake is 30%;
Step 5, dry: the filter cake that step 4 is obtained carries out drying by airing is air-dry, and to control moisture content be 15%;
Step 6, pulverizes: pulverized by dried for step 5 filter cake, i.e. the catalytic cracking catalyst kaolin of obtained low quartz content.
The catalytic cracking catalyst production technology of a kind of low quartz content of the present embodiment, the catalytic cracking catalyst of the low quartz content produced is 3.0% with kaolinic quartz content.
embodiment 5.
A catalytic cracking catalyst production technology for low quartz content, it comprises the following steps:
Step one, dispersed kaolin raw ore: kaolin raw ore and dispersant are evenly carried out dispersion step, the ore pulp of obtained dispersion, and the pH value and the proportion that control the ore pulp of dispersion; In the present embodiment, dispersion agent by weight ratio be the water glass of 55:2.5:1.2, caustic soda and Sodium hexametaphosphate 99 form; Wherein, the proportion of water glass is 43; Wherein, the pH value controlling the ore pulp of dispersion is 8.2; The proportion controlling the ore pulp of dispersion is 1.14;
Step 2, classification: utilize the ore pulp of whizzer to the dispersion that step one obtains to carry out classification, obtain the ore pulp after classification; In the present embodiment, the granularity of the ore pulp after the classification of 97% weight percent is 2 μm; Wherein, whizzer is horizontal spiral centrifuge;
Step 3, sedimentation: the ore pulp after classification is put into settling bowl and carries out sedimentation, and environmentally temperature control settlement time, obtain settled slurry; In the present embodiment, environmentally the temperature control settlement time, be specially: when envrionment temperature is 35 DEG C, the settling time is 60h; When envrionment temperature is 10 DEG C, the settling time is 80h;
Steps A, bleaching: the settled slurry utilizing SYNTHETIC OPTICAL WHITNER obtained to step 3 is bleached, the slurry of obtained bleaching, and the pH value controlling the slurry of bleaching is 2.6, and in the slurry controlling bleaching the content of ferric oxide for being less than 0.8%;
Step 4, filter-press dehydration: the settled slurry that step 3 is obtained carries out filter-press dehydration, obtained filter cake, and the moisture content controlling filter cake is 34%;
Step 5, dry: the filter cake that step 4 is obtained carries out drying by airing is air-dry, and to control moisture content be 12%;
Step 6, pulverizes: pulverized by dried for step 5 filter cake, i.e. the catalytic cracking catalyst kaolin of obtained low quartz content.
The catalytic cracking catalyst production technology of a kind of low quartz content of the present embodiment, the catalytic cracking catalyst of the low quartz content produced is 2.5% with kaolinic quartz content.
embodiment 6.
A catalytic cracking catalyst production technology for low quartz content, it comprises the following steps:
Step one, dispersed kaolin raw ore: kaolin raw ore and dispersant are evenly carried out dispersion step, the ore pulp of obtained dispersion, and the pH value and the proportion that control the ore pulp of dispersion; In the present embodiment, dispersion agent by weight ratio be the water glass of 58:2.8:1.3, caustic soda and Sodium hexametaphosphate 99 form; Wherein, the proportion of water glass is 43; Wherein, the pH value controlling the ore pulp of dispersion is 8.2; The proportion controlling the ore pulp of dispersion is 1.14;
Step 2, classification: utilize the ore pulp of whizzer to the dispersion that step one obtains to carry out classification, obtain the ore pulp after classification; In the present embodiment, the granularity of the ore pulp after the classification of 94% weight percent is 2 μm; Wherein, whizzer is horizontal spiral centrifuge;
Step 3, sedimentation: the ore pulp after classification is put into settling bowl and carries out sedimentation, and environmentally temperature control settlement time, obtain settled slurry; In the present embodiment, environmentally the temperature control settlement time, be specially: when envrionment temperature is 32 DEG C, the settling time is 72h; When envrionment temperature is 13 DEG C, the settling time is 83h;
Steps A, bleaching: the settled slurry utilizing SYNTHETIC OPTICAL WHITNER obtained to step 3 is bleached, the slurry of obtained bleaching, and the pH value controlling the slurry of bleaching is 3.0, and in the slurry controlling bleaching the content of ferric oxide for being less than 0.8%;
Step 4, filter-press dehydration: the settled slurry that step 3 is obtained carries out filter-press dehydration, obtained filter cake, and the moisture content controlling filter cake is 34%;
Step 5, dry: the filter cake that step 4 is obtained carries out drying by airing is air-dry, and to control moisture content be 12%;
Step 6, pulverizes: pulverized by dried for step 5 filter cake, i.e. the catalytic cracking catalyst kaolin of obtained low quartz content.
The catalytic cracking catalyst production technology of a kind of low quartz content of the present embodiment, the catalytic cracking catalyst of the low quartz content produced is 1.0% with kaolinic quartz content.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although done to explain to the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (10)
1. a catalytic cracking catalyst production technology for low quartz content, is characterized in that: it comprises the following steps:
Step one, dispersed kaolin raw ore: kaolin raw ore and dispersant are evenly carried out dispersion step, the ore pulp of obtained dispersion, and the pH value and the proportion that control the ore pulp of dispersion;
Step 2, classification: utilize the ore pulp of whizzer to the dispersion that step one obtains to carry out classification, obtain the ore pulp after classification;
Step 3, sedimentation: the ore pulp after classification is put into settling bowl and carries out sedimentation, and environmentally temperature control settlement time, obtain settled slurry;
Step 4, filter-press dehydration: the settled slurry that step 3 is obtained carries out filter-press dehydration, obtained filter cake, and control the moisture content of filter cake, i.e. the catalytic cracking catalyst kaolin of obtained low quartz content.
2. the catalytic cracking catalyst production technology of a kind of low quartz content according to claim 1, it is characterized in that: after described step 4 filter-press dehydration step, also comprise step 5, dry: the filter cake that step 4 is obtained carries out drying, and control certain moisture content, i.e. the catalytic cracking catalyst kaolin of obtained low quartz content.
3. the catalytic cracking catalyst production technology of a kind of low quartz content according to claim 2, it is characterized in that: after described step 5 drying step, also comprise step 6, pulverize: dried for step 5 filter cake is pulverized, i.e. the catalytic cracking catalyst kaolin of obtained low quartz content.
4. the catalytic cracking catalyst production technology of a kind of low quartz content according to claim 2, it is characterized in that: between described step 3 precipitation step and step 4 filter-press dehydration step, also comprise steps A, bleaching: the settled slurry utilizing SYNTHETIC OPTICAL WHITNER obtained to step 3 is bleached, the slurry of obtained bleaching, and control the pH value of slurry of bleaching, and the content of ferric oxide in the slurry controlling bleaching.
5. the catalytic cracking catalyst production technology of a kind of low quartz content according to claim 1, it is characterized in that: in described step one dispersed kaolin raw ore step, described dispersion agent by weight ratio be the water glass of 40 ~ 60:1 ~ 3:0.5 ~ 1.5, caustic soda and Sodium hexametaphosphate 99 form;
The proportion of described water glass is 38 ~ 45;
In described step one dispersed kaolin raw ore step, the pH value controlling the ore pulp of dispersion is 7.5 ~ 8.5; The proportion controlling the ore pulp of dispersion is 1.13 ~ 1.15.
6. the catalytic cracking catalyst production technology of a kind of low quartz content according to claim 1, is characterized in that: in the classification step of described step 2, and the granularity of the ore pulp after the described classification of 90% ~ 98% weight percent is 2 μm;
In described step 2 classification step, described whizzer is horizontal spiral centrifuge.
7. the catalytic cracking catalyst production technology of a kind of low quartz content according to claim 1, it is characterized in that: in described step 3 precipitation step, the described environmentally temperature control settlement time, be specially: when envrionment temperature is 20 DEG C ~ 50 DEG C, the settling time is 48h ~ 72h; When envrionment temperature is 0 DEG C ~ 20 DEG C, the settling time is 50h ~ 85h.
8. the catalytic cracking catalyst production technology of a kind of low quartz content according to claim 1, is characterized in that: in described step 4 filter-press dehydration step, and the moisture content controlling filter cake is 20% ~ 36%.
9. the catalytic cracking catalyst production technology of a kind of low quartz content according to claim 2, it is characterized in that: in described step 5 drying step, the filter cake that step 4 is obtained carries out drying by airing is air-dry, and to control moisture content be 5% ~ 15%, i.e. the catalytic cracking catalyst kaolin of obtained low quartz content.
10. the catalytic cracking catalyst production technology of a kind of low quartz content according to claim 4, it is characterized in that: in described steps A blanching step, the pH value of slurry controlling bleaching is 2.6 ~ 3.0, and in the slurry controlling bleaching the content of ferric oxide for being less than 0.8%.
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