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Method for producing organic clay

A production method and organoclay technology, applied in the field of organoclay production, can solve problems such as air pollution, non-clean production, and difficulty in governance, and achieve the effects of good product quality and reduced production costs

Active Publication Date: 2006-08-23
浙江华特新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although this process does not produce or only produces a small amount of industrial wastewater, the quaternary ammonium salt still contains a large amount of organic solvents, and volatilizes with water vapor into the air during the drying process, causing air pollution and is difficult to treat, so it is not a clean production method; In addition, due to the low degree of purification of the dry process, the quality of the organic bentonite product is not high, which limits the scope of use of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Take bentonite raw ore with a water-to-soil ratio of 10:1, beat for 2 hours, add modification additives and continue beating for 3 hours, dilute and settle for 4 hours, and purify the upper suspension with a centrifuge at a differential speed of 15 and a speed of 2500r / min, flow 20m 3 / h. The purified slurry has a solid content of 2.4g / 100ml, a solid content of 120kg, and a cation exchange capacity of 92mmol / 100g.

[0028] (2) Add 2200kg of tap water to a 3000L jacketed reaction kettle equipped with a circulation pump and a spraying device, heat it to 65°C with a steam jacket, and put in 560kg of a mixture of octadecyl / hexadecimal tertiary amine, of which C 18 Accounting for 68.2%, C 16 Accounted for 27.1%. Turn on the circulating pump to spray, open the pressure reducing valve of the methyl chloride cylinder, and slowly introduce the methyl chloride. As the reaction progresses, the temperature gradually rises to 90°C, and the air pressure in the reactor is cont...

Embodiment 2

[0032] (1) Take bentonite raw ore and sepiolite in a weight ratio of 2:1, put into beating, water: soil is 15:1, beating for 1 hour, after adding modification additives, continue beating for 3 hours, dilute with water to solid content After stirring and settling for 6 hours, carry out centrifugation and purification according to step (1) in Example 1. After purification, the suspension test has a solid content of 1.8g / 100ml, a total solid content of 90kg, and a total amount of cation exchange of 77mmol / 100g .

[0033] (2) The clay suspension prepared in (1) is heated to 85° C., according to 0.8 times of the total amount of cation exchange, add 108 kg of the quaternary ammonium salt solution in step (2) in Example 1, react for 0.5 hours, and then Dehydration, drying, crushing, grading and packaging.

[0034] In this example, industrial wastewater COD Cr It is 72mg / L; the product is tested according to HG / T2248 standard and the viscosity of type I is 3.5Pa.s.

Embodiment 3

[0036] (1) Get bentonite raw ore and attapulgite, put into beating for 3: 1 by weight, water: soil is 15: 1, beating for 2 hours, continue beating for 2 hours after dropping into modification additives, dilute with water to solid content of 4 %, after stirring and settling for 6 hours, carry out centrifugation and purification by step (1) in Example 1, the suspension test after purification contains solid content 1.2g / 100ml, solid content total amount 100kg, cation exchange total amount 85mmol / 100g.

[0037] (2) Add 1500kg of tap water to a 3000L reactor with a jacket and equipped with a circulating pump and spraying device, heat it to 65°C with a steam jacket, and put it into C 18 、C 16 、C 14 、C 12 Tertiary amine mixture 540kg, of which C 18 70%, C 16 23%, C 14 4.5%, C 12accounting for 1.5%. Turn on the circulating pump to spray, open the pressure reducing valve of the methyl chloride cylinder, and slowly introduce the methyl chloride. As the reaction progresses, the t...

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PUM

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Abstract

The present invention discloses organic clay producing process, which includes the steps of: pulping clay mineral, deposition and centrifuging purification to obtain clay suspension; preparing quaternary ammonium salt aqua of 10-30 wt% concentration with tertiary amine as material, water as solvent and introduced chloromethane; adding quaternary ammonium salt aqua into clay suspension for modification; and dewatering the modified solution, drying and crushing to obtain organic clay product. Thus produced organic clay product has high quality and the production process has low waste water CODCr index, and is one clean low-cost production process.

Description

technical field [0001] The invention relates to a material production method, in particular to a modified organic clay production method. Background technique [0002] At present, the process of producing organoclay at home and abroad generally includes the following process steps: raw ore clay wet dispersion, modification, purification, the purified suspension is modified with quaternary ammonium salt containing organic solvent, dehydration, drying and grading packaging. [0003] The organoclay produced by this process is stable in quality, but the modifying agent usually adopts more than 70% quaternary ammonium salt solution. Alcohols, etc.) are not adsorbed. These solvents enter the industrial wastewater during the dehydration process, making COD Cr Reach 2500 ~ 4000mg / L, bring environmental water pollution. [0004] Invention patent application 00101420.X discloses a production method of organic bentonite, the steps of which are beneficiation, crushing and concentrati...

Claims

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Application Information

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IPC IPC(8): C01B33/44C04B33/04
Inventor 汪平华
Owner 浙江华特新材料有限公司
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