CN1328959A - Laminate sodium metasilicate and its production method - Google Patents
Laminate sodium metasilicate and its production method Download PDFInfo
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- CN1328959A CN1328959A CN 00117776 CN00117776A CN1328959A CN 1328959 A CN1328959 A CN 1328959A CN 00117776 CN00117776 CN 00117776 CN 00117776 A CN00117776 A CN 00117776A CN 1328959 A CN1328959 A CN 1328959A
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- sodium metasilicate
- production method
- molecular structure
- adjuvant
- surfactant
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- Silicates, Zeolites, And Molecular Sieves (AREA)
- Detergent Compositions (AREA)
Abstract
The present invention relates to a laminar sodium metasilicate and its production method. It is characterized by that it uses sodium metasilicate whose molecular structure exhibits beta form and substituted molecular structure is alpha form used as detergent phosphor substitute adjuvant, and can raise its compatibility with other surfactant and adjuvant, and can be directly mixed to form a paste, and can be sprayed and dried so as to produce the hollow granular washing powder with lower apparent density. It possesses stronger synergistic action with surfactant in the fields of dispersion, emulsification and detersive power. This invention uses liquid sodium silicate and caustic soda as main raw materials, under the action of catalyst, it makes the above-mentioned materials produce reaction, and adopts the spray-drying process so as to obtain the finished product.
Description
The present invention relates to a production formula and a production process of layered sodium metasilicate.
The layered sodium metasilicate has two crystal forms of anhydrous substance and pentahydrate according to whether crystal water is contained in the molecular structure, the molecular structures are both β -shaped, and compared with α -shaped sodium metasilicate pentahydrate and sodium metasilicate nonahydrate, the layered sodium metasilicate has the characteristics of convenience in use, detergency, dispersibility, emulsibility, bleaching property, hard water resistance, corrosion resistance and strong pH value buffer capacity, and can replace α -shaped sodium metasilicate to become an important phosphorus-substitute auxiliary agent in the detergent industry.
The layered sodium metasilicate with α -shaped molecular structure replaces phosphate auxiliary agents in the detergent industry, makes a prominent contribution to reducing water eutrophication of rivers and lakes, but has a lower melting point, is not suitable for producing spray-dried washing powder, can only produce low-phosphorus or phosphorus-free washing powder by adopting an agglomeration method, has larger apparent density, nonuniform particles, poor fluidity and easy caking, and can also influence the softness of washed clothes.
The layeredsodium metasilicate can also be applied to the grinding-aid enhancement of ceramics and refractory materials, cement admixture auxiliary agents, electroplating pretreatment and pH value buffering, cotton yarn cooking bleaching, petroleum pipeline dredging and industrial and mining equipment corrosion prevention, and has wide application.
At present, soluble solid sodium silicate can be produced by producing sodium metasilicate pentahydrate, sodium metasilicate nonahydrate and layered sodium silicate (also called layered two-crystal sodium silicate and light sodium silicate) in China, but manufacturers for producing the layered sodium metasilicate do not exist, and technical reports of the aspect are not available. The invention designs the laminated sodium metasilicate with the production capacity of 5000 to 10000 tons every year, and no three wastes are discharged in the production.
The invention takes liquid industrial sodium silicate and caustic soda as main raw materials to react under the action of a catalyst, and the reaction equation is as follows:
wherein n represents the modulus of sodium silicate; m represents the amount of crystal water.
The production formula of the invention is as follows (weight percentage W%):
industrial sodium silicate (n ═ 3, 40B): 56
Liquid caustic soda (30%): 44
The production equipment and facilities adopted by the invention are as follows:
a carbon steel reaction kettle with a jacket and a coil pipe, a polypropylene plate-and-frame filter press and a high-speed centrifugal spray dryer.
Auxiliary facilities: steam boiler, hot-blast furnace, basin, cement pond.
The production process flow of the invention is shown in the attached figure 1 of the specification.
Example (b): and (3) inputting liquid sodium silicate and liquid caustic soda into a cement pool by using a metering pump according to a formula ratio, mixing, and filtering the mixed solution by using a plate-and-frame filter press. Then the filtrate is put into a reaction kettle, steam is introduced for heating while stirring, and when the temperature of the liquid in the kettle rises to 80 ℃, 0.05 percent of catalyst is added. When the concentration of the liquid is increased to 35 Baume degrees, the heating is stopped, the liquid is input into a high-speed centrifugal spray dryer for dehydration and drying, and finished product particles can be weighed and packaged through screening.
Claims (3)
1. A layered sodium metasilicate and its preparation method are provided. The method is characterized in that the reaction equation of the layered sodium metasilicate is as follows:
2. the method as claimed in claim 1, wherein the layered sodium metasilicate is produced in a formulation (W%) comprising:
liquid sodium silicate (n ═ 3, 40 Be): 56
Liquid caustic soda (30%): 44
3. The method as claimed in claim 1, wherein the production process of the layered sodium metasilicate comprises the following steps:
mixing → filtering → reacting → spray drying → sieving → weighing and packaging
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00117776 CN1328959A (en) | 2000-06-18 | 2000-06-18 | Laminate sodium metasilicate and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00117776 CN1328959A (en) | 2000-06-18 | 2000-06-18 | Laminate sodium metasilicate and its production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1328959A true CN1328959A (en) | 2002-01-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00117776 Pending CN1328959A (en) | 2000-06-18 | 2000-06-18 | Laminate sodium metasilicate and its production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1328959A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570936A (en) * | 2009-05-21 | 2009-11-04 | 张家港贝丰化工有限公司 | Formulation of instant layered sodium metasilicate and production process thereof |
| CN112442429A (en) * | 2020-11-13 | 2021-03-05 | 苏州德韬科技有限公司 | Industrial cleaning agent and preparation method thereof |
-
2000
- 2000-06-18 CN CN 00117776 patent/CN1328959A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570936A (en) * | 2009-05-21 | 2009-11-04 | 张家港贝丰化工有限公司 | Formulation of instant layered sodium metasilicate and production process thereof |
| CN112442429A (en) * | 2020-11-13 | 2021-03-05 | 苏州德韬科技有限公司 | Industrial cleaning agent and preparation method thereof |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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