How to solve the problem of excessive "chlorine" in chlor-alkali chemical companies?

Liquid chlorine, hydrochloric acid, hyposodium, benzene chlorination, pesticides

Our company doesn't have enough chlorine. Even the tail chlorine and waste chlorine are used to produce hydrochloric acid and subsodium. However, our hydrogen is really of no use.

If there is too much chlorine, it can only be sold at a low price. If there is too much hydrogen, the simplest way is to vent it. Secondly, you can buy a hydrogen boiler to produce steam. It is best to sell industrial hydrogen, but the investment cost is very high.

The combustion of hydrogen and chlorine generates hydrogen chloride as a raw material for the production of VCM. Usually the excess of hydrogen is 1.05~1.1. Generally, there is no excess hydrogen, resulting in the by-product liquid chlorine. Nowadays, "chlorine" makes us very worried. This post was last edited by limingshuguang on 2009-2-8 21:41 ]

The chlorine produced by chlor-alkali chemical industry is mainly used for subsequent product applications, and will not only produce caustic soda and liquid chlorine. Follow-up products generally include: Liquid chlorine, sodium hypochlorite, HCL (mainly used in the production of vinyl chloride---PVC resin), hydrazine hydrate, epichlorohydrin, chloroacetic acid, trichlorosilane and other products.

Our company uses electrolysis of water to produce hydrogen, balancing more chlorine

Brother, did you remember it wrong? Do you control excess chlorine when producing VCM? ? ?

It is mainly balanced according to the chlorine consumption of each product. Our excess chlorine is made into liquid chlorine for sale. Other chlorine-consuming products can also be produced

Hydrogen can be used to make hydrogen peroxide. Our hydrogen peroxide is very profitable!

What they are talking about upstairs is whether chlorine is good or not. Excessive chlorine only increases the cost. It is difficult to sell frozen liquid chlorine under the tide of economic crisis. The best way is to reduce the current of IM DM. The most practical way haha

Most of our company's liquid chlorine is first used by customers, and they pay for it! hehe

Due to safety issues, our company does not have a liquid chlorine device. We can only use a good alkali to absorb excess chlorine to make subsodium. It is a pity.

Years ago, our company had too much chlorine, so we could only liquefy as much as possible, and then sell it in cylinders. However, our hydrogen was never enough. This post was last edited by limingshuguang on 2009-2-8 21:39 ]

If there is too much hydrogen, it can be used to make hydrogen peroxide. I have seen that many chlor-alkali plants are now involved in hydrogen peroxide projects.

This situation should be divided by region. For chlor-alkali companies close to developed areas in the east, because there are many downstream chlorine-consuming product development companies, product demand is large, and there is no problem of unsalable liquid chlorine, there is a lot of room for choice when adjusting the chlor-alkali balance. In addition, chlorine is easier to collect than hydrogen, so hydrogen venting is chosen without adding equipment to produce more liquid chlorine and alkali. For most northern enterprises, they mainly produce alkali and PVC, and the downstream chlorine-consuming products are single. At the same time, due to the transportation of hazardous chemicals, liquid chlorine can easily encounter a backlog of liquid chlorine in production, and they are forced to reduce flow or use methods such as sub-production sodium discharge to preserve production. Xinjiang Tianye has a good solution to this problem, which is to install a hydrogen production device to combine it with chlorine gas to produce hydrogen chloride for production by PVC factories and balance it internally.

Regarding the original poster’s question, in Sichuan you need to investigate which chlorine products are best sold downstream and then go into production, so that the sales pressure will be less! Also consider the cost of auxiliary raw materials!

I don’t quite understand what you mean by the sentence in red above. Are you using an ion membrane or diaphragm process? Under normal circumstances, chlorine will not cause any trouble. As long as there is no leakage, there is usually no problem. It can produce liquid chlorine, subsodium, hydrochloric acid, etc. Under what circumstances would it be redundant?

Your unit is wasting the finished alkali. When the alkali market is very good, the alkali you waste is enough for liquid chlorine. Hehe~~~ Improve it. This is not an option in the long run. This post was last edited by limingshuguang on 2009-2-8 21:41 ]

You misunderstood. Ha ha. What he said to you means the same thing, not what he said 1: Is it 1.05? The excess chlorine is what is left after the synthesis of hydrochloric acid.

There are two ways to deal with excess chlorine in chlor-alkali enterprises: One is to make liquid chlorine for takeaway ； The second is to supplement hydrogen to balance excess chlorine to achieve the purpose of producing more VCM. This is what we do in Xinjiang Tianye and Zhongtai. We use natural gas to produce hydrogen to balance excess chlorine to increase VCM production. When the liquid chlorine market is promising, we stop producing hydrogen and sell liquid chlorine.