N-Vinyl-2-pyrrolidone CAS NO.88-12-0

hebei yanxi chemical  co., LTD who registered capital of 10 million yuan, nearly to $2 million, we have a pharmaceutical raw materials factory production of pharmaceutical raw materials, and a reagent r&d center, and we do research and development production of reagent tens of thousands of species. our aim is quality strives for the survival. Seek development by credit reputation. Our products have big price advantage in Europe South America and so on .and Our company also has the advantage of high quality in Africa. in the past two years our products has reached more than 30 countries in the world, Europe. South America. North America, southeast Asia, Africa, etc. We welcome all over the world with the best quality and lowest price friend common cooperation and common development!

1:Safe shipping (TNT;EMS;FEDEX;DHL;UPS;EUB)

2:Safe payment(Btc;MoneyGram;WU)

3:Safe packing (Paraffin coating; Double aluminum foil bag; Vacuum packaging)

4:Fast delivery (3-10 DAYS fast home delivery service )

5:Best quality (Without any doping, all products are pure)

6:Safety guarantee (we do this business long time ,we know how to disguise let the product through customs)

8:New international transportation system(Pls see the pic,The transportation line reaches every corner of the world)

9:Huge Supply(We have many raw materials and processing centers,Each day can provide dozens of kilogram-hundreds of kilograms of different products.)

10:Low Price(All the products are factory prices it can let you have a bigger profit margin)

1.lowest price 

2.good service

3.best quality 

4.rich experience 

5.support sample

Overview:
N-Vinyl-2-pyrrolidone (N-Vinyl-2-pyrrolidone) for short NVP, also known as 1-vinyl-2-pyrrolidone, n-vinyl-2-pyrrolidone. At room temperature, it is a colorless or light yellow transparent liquid with a slight odor, easily soluble in water and other organic solvents. N-vinylpyrrolidone is widely used because it can increase the physical and chemical properties of products: in radiation medicine, wooden flooring industry, paper or paperboard industry, packaging materials, screen ink industry through the use of NVP to improve the physical properties of products.

Preparation:
A preparation process for N-vinylpyrrolidone comprises the following steps:
1, the preparation of dehydration catalyst The dehydration catalyst contains silver sulfate, sodium aluminosilicate, white carbon black, zeolite and polyoxide, the ratio is: 0.5:5:5:10; The multioxide is a mixture of vanadium pentoxide and zirconium oxide, tin oxide, rhenium heptoxide and manganese dioxide at least one of them; The polyoxide may be selected as a mixture of vanadium pentoxide and zirconia, vanadium pentoxide and tin oxide, vanadium pentoxide and zirconia and manganese dioxide. In this embodiment, the polyoxide is selected as a mixture of vanadium pentoxide, zirconia, tin oxide and rhenium heptoxide, and the mixing ratio is 0.2:1:2:1. The production steps of the dewatering catalyst are as follows: silver sulfate, zeolite and polyoxide are mixed in proportion, and then added to 1 times the volume of distilled water, with sulfuric acid and ammonia to adjust the pH value to 6.5 ~ 7, and then add sodium aluminosilicate and white carbon black in proportion, heating and stirring to make a uniform solution; The solution is concentrated and dried under stirring in a water bath, dried at 100 ~ 120℃ for 6 ~ 8h, and then roasted at 400 ~ 450℃ for 3 ~ 5h.
2, the preparation of N-hydroxyethylpyrrolidone (NHP) 1) The intermediates were prepared by mixing gamma-butyrolactone, monoethanolamine and ammonia water according to the molar ratio of 1.2:1:0.2, reacting at 0.5MPa and 40℃ for 4h; 2) Activated 0.1wt % molecular sieve and 0.1wt % diethylene glycol dimethyl ether were added, and the temperature was raised to 180℃, and the dehydration reaction was carried out in the retention state for 12h; The molecular sieve is 10X molecular sieve or 13X molecular sieve, and the molecular sieve is selected as 10X molecular sieve in this method; 3) Vacuum distillation, vacuum degree of 0.095MPa, collect the boiling point of 210 ~ 216℃ fractions, the main component of the fraction is N-hydroxyethylpyrrolidone;
3. The dehydration reaction of N-hydroxyethylpyrrolidone makes the distillate obtained in the preparation of N-hydroxyethylpyrrolidone into steam, and mixes it with alkaline gas, acetylene gas and nitrogen to obtain a gaseous raw material mixture with a mixing ratio of 1:0.5:1:0.1; The gaseous raw material mixture is loaded through a fixed bed reactor with dewatering catalyst at a temperature of 350℃, pressure of 0.01MPa and gas phase space velocity of 50 ~ 300h-1, and the dewatering catalyst in the fixed bed reactor is heated to 390℃. After the dehydration reaction reaches equilibrium, The N-vinylpyrrolidone (NVP) product is expelled from the fixed bed reactor. The alkaline gas is at least one of ammonia, methylamine, dimethylamine, trimethylamine and ethylamine. N-vinylpyrrolidone products prepared by this method were analyzed by gas chromatography with γ-butyrollactone as internal standard and ethanol as solvent. NHP conversion, NVP selectivity and NVP yield were calculated. The test conditions of gas chromatograph were as follows: TCD detector, stainless steel column, polyethylene glycol succinate fixative liquid, nitrogen as carrier gas, silanized 102 white support, gasification chamber temperature 280℃, TCD detector temperature 165℃, column temperature 190℃; The NHP conversion rate was 92.8%, NVP selectivity 91.5% and NVP yield 85.6%.

Company Introduction

hebei yanxi chemical  co., LTD who registered capital of 10 million yuan, nearly to $2 million, we have a pharmaceutical raw materials factory production of pharmaceutical raw materials, and a reagent r&d center, and we do research and development production of reagent tens of thousands of species. our aim is quality strives for the survival. Seek development by credit reputation. Our products have big price advantage in Europe South America and so on .and Our company also has the advantage of high quality in Africa. in the past two years our products has reached more than 30 countries in the world, Europe. South America. North America, southeast Asia, Africa, etc. We welcome all over the world with the best quality and lowest price friend common cooperation and common development!

Our advantages

1) Timely communication, reply within 12 hours.You can leave any messages on our whatsapp or send email to us.

2)Selecting raw materials strictly,our products are the highest purity.

3)Reasonable and competitive price.

4) Free sample for your evaluation.Customers only need to undertake the shipping fee for delivery the samples to your destionation.

5)OEM/ODM Available.Trial order is available for testing after samples.

6) Packaging can be customized according to each buyers' special request.

We guarantee that your package will pass 100% through the Mexico US, UK, Australia, Netherlands, Canada, France, Germany, Spain, Belgium, Sweden, Poland, Russian, Ukraine, Kazakhstan, Czech Republic, Slovakia, Portugal.

We have freight forwarders in these countries, and our customs clearance company will clear your parcels without any customs issues, sometimes even 1000 kg. Door to door service. Make sure you receive 100% of the goods. Let you have a good experience of our strong freight capacity.

After Sales Service

1) Best quality in your requirement

2)Competitive price in china market

3)Mature technical support

4)Professional logistic support

5 )Full experience of large numberscontainers loading in chinese sea port

6 )Fast shipment by reputed shipping line

7) Packing with pallet as buyer's special request

8) Best service after shipment.

9) Cargoes together with container after-sales service available

10) Full experience in export

11)Raw materials from chinese origin

FAQ

1.What is the way you ship

Express: FedEx, UPS, EMS, DHL, USPS, TNT, DPD, Aramex etc

Our way of shipping the products is universal and secure.

The company name and other contents related to pharmacy are not written on the package slips.

The way of packing is regularly changed for a secure delivery.

The packages are small in order to avoid unwelcomed questions . If the order is big, then it will be divided into two or more packages

2.Can the packages be trackable

YES, we provide tracking number and you can track on internet.

3.Where do you ship to

Worldwide.

4.Do you offer domestic shipping/remail shipping

Yes we can ship to USA/UK/Canada/Australia/Germany etc warehouse first then to you.

5.Do you ensure your packing, what about customs, what happens if the package is retained

We concern a lot about our safety system, we pack the orders as secure as possible. If a package is seized at customs, reships of seized orders will be done provided you have a copy of the letter to show us. If you receive a seizure letter, please contact us immediately with a scanned copy of the seizure letter, and also a new address to have your order reshipped to.

6.Which payment options are available

Bitcoin,,Bank wire,MoneyGram