Sodium naphthalene sulfonate formaldehyde as raw materials

Acrylic acid, acrylamide, and sodium naphthalene sulfonate formaldehyde as raw materials, ammonium persulfate as an initiator, synthesized by free radical solution copolymerization of a polycarboxylate superplasticizer, as demonstrated by a variety of detection methods for the synthesis of substance is a terpolymer, and its performance was tested. The effects of reaction temperature, the amount of initiator and pH on polymer yield and structure. With a relatively simple synthesis of a high yield and excellent performance sodium naphthalene sulfonate formaldehyde. Also known as dispersants or water reducing agent, plasticizer, is a class of the most common and important concrete admixture. Less than 5% water rate less than 10% of the reducing agent called ordinary water, water reduction rate of more than 10% of the water reducer called sodium naphthalene sulfonate formaldehyde. Superplasticizer as the fifth component of modern concrete, which is widely applied, has become an important means of high-performance concrete.

Polyethylene glycol methyl ether (MPEG), methacrylic acid (MAA), allyl sulfonate (SAS) and ammonium persulfate (APS) as a raw material monomer such as synthesis of a sodium naphthalene sulfonate formaldehyde , the effect of factors that lead to agents, chain transfer agent, monomer fluidity of cement paste, and analyzes the relationship between different superplasticizer concentration and surface tension; studies show that when the amount of the monomer initiator quality 5 %, the chain transfer agent is 0.3%, SAS is 15%, MAA / MPEG molar ratio of 8:00, water reducing agent for cement better dispersion and plasticity of different cement has good adaptability. In recent years, high performance concrete, sodium naphthalene sulfonate formaldehyde attracted widespread attention. And lignin sulfonate superplasticizer and naphthalene superplasticizer compared superplasticizer with high water reduction, high slump resistance, cement adaptability advantages. Polylactic acid is a polymer having a comb structure of surfactant molecules can be designed strong structure, can control the degree of sodium naphthalene sulfonate formaldehyde of the main chain.

By measuring doped sodium naphthalene sulfonate formaldehyde cement paste setting time, chemical shrinkage, the initial heat of hydration, compressive strength, while taking advantage of XRD analysis, the effect of cement hydration under water reducing agent were studied. Effects of sodium naphthalene sulfonate formaldehyde. The results showed that: Polycarboxylate has a strong retarding effect while having good dispersion, effectively inhibit the initial hydration, without affecting the post-hydration.

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Sodium lignosulfonate is second only to cellulose

Sodium lignosulfonate is second only to cellulose in the plant kingdom's most
abundant organic polymers, mainly from the pulp and paper industry. Isolated from the plant each year about 1.4t cellulose, and lignin get 5000t. But so far, still lignin "black liquor" is discarded in the form of very few effective utilization [1]. Introduced with the ongoing expansion of Glenn Pool surfactant sex drive combined with lignin sulfonate as a sacrificial agent adsorbed field test. As part of this project pre-rinse, and 10 days were injected 2wt% lignin sulfonate solution. Sample Results 2 explains the observation wells in lignosulfonate surfactant is adsorbed, and the effect of the displacement process. Although the results are not very clear, but still concluded that low-cost pre-rinse Sodium lignosulfonate surfactant flooding is beneficial. Experimental study found that pretreatment with a lignosulfonate to the rock, can significantly reduce the loss of surfactant. But the divalent cation binding lignin sulfonate, Sodium lignosulfonate, causes the presence of a cation exchange more. Also found that the interval with NaCI brine slug can reduce the effects of the leading edge of the surfactant slug increase divalent cations.

Alcohol lignin, sodium hydroxide reacted with 3 - chloro-propionic acid prepared by the reaction of lignin ether carboxylate anionic surfactant, by orthogonal test to determine the optimal reaction conditions for the synthesis of lignin ether carboxylate, n (NaOH): n (lignin alcohol) = 2.5, n (3 - chloro-propionic acid): n (lignin alcohol) = 1.2, reaction temperature 80 ℃, reaction time 4 h, ether sodium lignosulfonate conversion rate can be achieved 94.8%. Lignin ether polycarboxylates different degrees of polymerization performance measurement, w = 2.5% of the surface tension can be achieved 41.2 mN / m, lime soap dispersion index of 4.8% ~ 8.4%; turpentine emulsion force 31 s, foam height is 30 ~ 50 mm. Ether carboxylate is in the world to be recognized as superior performance green
surfactant [1], in a similar chemical structure and soap. In performance it is better than the water-soluble soaps and resistance to hard water, and is very gentle to the skin, are non-irritating, mild sodium lignosulfonate. Ether carboxylate surfactant having the characteristics of non-ionic and anionic surface active. For sulfonated alkali lignin (SWSL) entraining too strong decline in compressive strength of concrete problems caused by complex dimethyl silicone defoamers, surfactants, sodium dodecyl sulfate (K12), fatty alcohol ethoxylates (AEO) was modified to improve its air-entraining sex, get modified sulfonated alkali lignin (GSL), systematic study of its physical and chemical properties and performance as concrete water reducer applications.

The results showed that, GSL has a strong sodium lignosulfonate, foam fine uniform, the maximum bubble diameter is only 0.5mm. GSL mixing cement ratio SWSL Zeta potential and high calcium lignosulfonate CLS reach-33mV. Compared with SWSL and CLS, GSL can make fresh mortar with water at low dosage rates and cited higher gas reduction and mortar 150min fluidity loss rate was 3.8%. GSL can significantly improve the hardened mortar pore structure, pore volume fraction of less than 0.02mm holes up to 81.5%. Wood sodium lignosulphonate. Content w (GSL) = 0.25%, the concrete water-reducing rate of 13.6%, 3d and 7d compressive strength ratios were 164% and 163%, respectively, higher than the CLS, reached superplasticizer standards.

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By radical calcium lignosulfonate solution

By radical calcium lignosulfonate solution copolymerization reaction at the surface of calcium lignosulfonate grafted acrylic acid, maleic anhydride,
polyethylene glycol (400) and other monomers synthesized new modified lignin calcium sulfonate superplasticizer, and their structures were characterized; study the new modified calcium lignosulfonate water reducing agent for entraining solution interface parameters and properties, adsorption surface of cement particles and Zeta potential dispersion of cement particles and cement paste reduction performance impacts, and analyzes the mechanism of action. The results show that the new modified calcium lignosulfonate calcium lignosulfonate itself to overcome the entraining too much, retarding defects, and water reduction effect is obvious, that in its content is 0.5% under conditions of reduced water rate of 23.7%; cement paste 7 days and 28 days respectively,
the compressive strength of 94.6 MPa and 107.3 MPa. Calcium 
lignosulfonate from pulp waste liquor is lignin sulfonate obtained by a series of processing paper products, pulp digestion and waste paper pulp processing, reduce river pollution, environmental protection of an important environmental products.

Efficient application of calcium lignosulfonate pulp and paper industry is an important driving force for sustainable development, but nevertheless, calcium lignosulfonate most widely used. Using multiple hydroxyl sulfonating agent for alkali lignin was modified lignin preparation sulfonate superplasticizer cement, by optimizing the modification process to determine the optimal process conditions: the solid content of 40% of the lignin-containing black liquor, adjusting the pH to 12, increasing the temperature to 60 ℃, adding 1% of the mass fraction of black liquor concentration of 30% hydrogen peroxide, the reaction 2 0min, warmed to 12 0 ℃, 9% mass fraction of black liquor is added to the polyhydroxy sulfonating agent, sulfonated 3h. Alkali lignin dispersant performance can reach the current level of calcium lignosulfonate market. Old small soda pulp and paper companies pollute the water environment is very serious. Water pollution mainly from the pulp and waste produced during chemical pulping, commonly known as "black liquor" black liquor contains a lot of organic and inorganic, high COD value and chroma. In recent years, as people on a higher level of environmental concerns, research on treatment methods to explore a lot of black liquor.

With straw or wood pulp alkali lignin as raw material, through Mannich reaction with aliphatic polyamines, acylation of oil and sulfomethylation chloride reacts with the synthesis of a series of modified calcium lignosulfonate acid amide-containing structures salt surfactant. interfacial properties of the modified lignin sulfonate were tested, discussed the impact of the mass fraction of surfactant and alkali content of the interfacial tension results showed that
the modified product has a very good surfactants, Calcium lignosulphonate is a natural polymer, alone You can use the range of variation in the surfactant mass fraction and mass fraction of a wide base to form ultra-low oil - water interfacial tension, comply with the basic requirements of tertiary oil recovery.

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Sodium naphthalene sulfonate formaldehyde years

Sodium naphthalene sulfonate formaldehyde years there has been bleeding,
segregation and slump loss with time and other shortcomings. We find that, by (1) to extend the condensation time (2) adding acid modified S two ways to reduce the slump loss at the same time, can significantly reduce bleeding; and analysis found that adding 11% of modified S carboxyl content of the finished product, yield increased after acid, sulfonated increased by 10%. Naphthalene superplasticizer have raw cheap, simple synthesis process and low cost advantages. However, the disadvantage of sodium naphthalene sulfonate formaldehyde is also well known, such as bleeding, segregation, slump when big loss, poor adaptability to different cement. Years of study at home and abroad
to improve its shortcomings [1-3] a lot, but most of the time focused on improving the slump loss. Focus describes the condition of the characteristics of superplasticizer, research and development. Some issues to be raised further study and research trends sodium naphthalene sulfonate formaldehyde. Ultra-fine mineral admixture is inorganic non-metallic materials.

Superplasticizer is currently the most widely used research and a concrete admixtures, concrete admixtures has become other than cement, sand, stone fifth part of [1]. One is to improve the concrete mixing water reducing admixtures rheological properties of water reducer in concrete slump is basically the same and does not affect sodium naphthalene sulfonate formaldehyde the workability conditions, with less water, raising the temperature effect of admixtures. Synthesized by molecular design various functional groups containing carboxylic acid copolymer (CoPoCa-300) admixtures, and naphthalene sulfonic acid formaldehyde condensates get a new series of complex composite superplasticizer
CoPoCa-NSF series. Superplasticizer compound reduces the amount of sodium naphthalene sulfonate formaldehyde and produces ultra-additive effect of
the composite water reducer has a high water reduction (24% to 28%) and good slump retention, can significantly improve the strength of the concrete 40% to 50%. Currently widely used in domestic superplasticizer mainly naphthalene sulfonic acid formaldehyde condensate (referred naphthalene superplasticizer), amino acid salt series polycarboxylate polymers and superplasticizer [1].
Polycarboxylate superplasticizer series is widely recognized as a new, green high-performance water-reducing agent [2-4], the biggest advantage of this type of water-reducing agent is water reducing rate.

Concrete slump loss with time small paper describes the structure of
the type commonly used sodium naphthalene sulfonate formaldehyde, performance characteristics and application of research status at home and abroad; analyzes the development and application of naphthalene superplasticizer problems. Process for the sodium naphthalene sulphonate formaldehyde. Single-factor test, based on a systematic study of the molar ratio of the monomers, the various stages of reaction time, reaction temperature, acidity and other process parameters and material for naphthalene superplasticizer performance, determine the optimal synthesis of process parameters.

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Standard solution Weigh the calcium lignosulphonate

Glucose standard solution Weigh the calcium lignosulphonate 140mg, was dissolved in 500ml of water. Disodium hydrogen phosphate solution of disodium hydrogen phosphate heptahydrate take 19g, was dissolved in 100ml of water.
Weigh accurately a sample 1g, dissolved i50ml water, with sodium hydroxide solution or acetic acid to adjust the pH to 6.9 to 7.2. The gradual addition of basic lead acetate solution, to no longer feel there is progress = step precipitation occurs. After adding calcium lignosulphonate water to 250.0ml mix well: the mixture was centrifuged; moved into the supernatant 10ml 50ml volumetric flask, and then diluted to about 35rnl. Plus disodium hydrogen phosphate solution 2ml or more, ˉ to no precipitation occurs. Diluted to 50ml after mixing.

Centrifuged at 2100 times gravity 10min. 5ml of the supernatant into a suction tube, add notes reagent solution 5ml, and mixed. The mouth of the tube loosely
stuffed 40min ± 10s placed in a boiling water bath. After heating, the tube immediately in cold water in the cooling calcium lignosulphonate. Plus 2.5% potassium iodide solution 2ml and 2mol / L sulfuric acid 1.5ml. After thoroughly mixed with 0.005mol / L sodium thiosulfate, using starch indicator, record the consumption volume of anger. Repeat, recording glucose standard solution (glucose standard solution 5rnl plus copper reagent 5ml) the consumption volume of ‰. Above every titration, and with 5ml of calcium lignosulphonate and bml copper reagent solution as a blank, blank titration, set the consumption volume of ‰.

2 spindle at 20r/min by a Brookfield viscometer A.Packing: PP woven bag lined with plastic film topical double packaging, net weight 25kg / bag Storage: Store
in a dry and ventilated place, should pay attention to moisture and moisture. Long-term storage is not bad, Calcium lignosulphonate pulp and paper industry, if agglomeration, crushing or dissolving the transport does not affect the results: This product non-toxic, non-flammable and explosive dangerous goods department.

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The list of devices sodium gluconate

This report from the list of devices sodium gluconate, consumption of raw materials, production processes, material balance, pollution intensity analysis,
pollution prevention measures, waste water, waste gas, solid waste, emissions of major pollutants summary, material balance and emission points, etc. many aspects of the environmental elements of sodium gluconate a detailed discussion of the evaluation report can be used as an industrial environment of sodium gluconate. According to the requirements of the investment system, the government will no longer approve the feasibility study report corporate investment projects, market prospects, economic, funding, product technology programs by companies independent decisions.

When the project application report shall be submitted to become a corporate investment and construction projects approved by the Government, in order to obtain project approval authority for the proposed project's administrative license shall be submitted by the approved project feasibility reports. "Sodium gluconate project business plan," according to "People's Republic of China Administrative Licensing Law", the "Decision of the State Council on Reform of Investment System", "corporate investment projects approved by the Interim
Measures," "foreign investment projects approved by the Interim Management Measures" and the "International financial organizations and foreign government loans investment project Sodium gluconate Management Interim Measures "project
application report prepared by the provisions of general purpose text, focusing on the layout of the proposed project from planning, resource utilization, land on migration, environment, economic and social impacts such as a comprehensive demonstration Sodium gluconate, provide the asis for the relevant departments of the enterprise investment projects to be approved.

The project business plan can be combined with the actual situation of the project itself, as required for generic text content appropriate adjustments; If the proposed project does not involve one of the content, you can not explain the situation in detail after the demonstration. Help companies to prepare the project to achieve Sodium gluconate the project approval system project application report. Company team of experts sodium gluconate. Ben can be issued by the machinery and equipment, electronic information, petrochemicals, energy, metallurgical industry, environmental protection, food, agriculture, forestry, industry, light industry, aviation, transportation industry, pharmaceutical, medical and other industries "Class Engineering
Consulting Certificate" .

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